Tier-1 Authoritative Guides
Deeply-researched regulatory + cost pillars for homeowners who want to hire one vetted GC, not twelve strangers. Each guide maps the real permit stack, license verification, and cost reality in its city — with sourced citations from the authorities themselves.
Service Pillars
Phoenix ADU + Casita Construction
Arizona HB 2720 made ADUs by-right on every Phoenix SFR lot. $120K–$350K range, 60-day PDD plan-review clock, ROC B-3 verification, HOA architectural-review gate.
Miami Hurricane Impact Windows — HVHZ NOA Guide
Miami-Dade + Broward are the only HVHZ counties in the US (FBC Chapter 16 §1620). NOA format, 3-component NOA requirement, PGT / CGI / WinDoor / ES Windows cost bands, OIR-B1-1802 wind-mit 10–45% premium credit, SB 4-D milestone + SB 2-A AOB reality.
Ventanas de Impacto en Miami — Guía NOA + Prima de Seguro
Ventanas HVHZ homologadas Miami-Dade. Qué es un NOA, cómo verificarlo, y 10-45% de ahorro con la inspección OIR-B1-1802. SB 4-D Milestone post-Surfside. SB 2-A eliminación AOB residencial post-2023. Un instalador verificado, no doce.
Brooklyn Brownstone Whole-Home Renovation
Brownstone gut reno reality — $300K-$2M+. LPC Certificate of Appropriateness 3-6 months vs CNE 20-40 days, DOB ALT-1 filing, landmark district material matching, foundation settlement on the Park Slope moraine, chimney flue re-lining at $6-12K each. One vetted GC who closed 5+ Brooklyn brownstones.
London Loft Conversions — Mansard, L-shape, Dormer, Velux
The 5 loft conversion types with real 2026 cost bands (£45K Velux → £120K mansard). GPDO 2015 Class B 40m³/50m³ volume rule, Article 4 Directions in Hampstead/Canonbury/Dulwich, Party Wall Act Section 3 steels, Part B fire-escape £3K-£8K trap. One vetted GC with NHBC/LABC Warranty.
Rénovation d'appartement haussmannien — Le guide complet
Le double verrou copropriété + ABF (couvre 94% du Paris intra-muros). Seuils DP/PC 5/20/40/150m², TVA 10% vs 5,5%, assurance décennale obligatoire. Stack d'aides MaPrimeRénov' + CEE + Éco-rénovons Paris+ up to €10K par copro. Un artisan vérifié, pas douze.
Austin ADU Builder — Post-HOME Initiative Guide
HOME Initiative Phase 1 + 2 (Dec 2023 + May 2024) made ADUs by-right on most Austin SFR lots. Texas has NO state GC license — Baily verifies TDLR trades + COI + TWCA + municipal registration instead. $180K-$350K new-build, $120K-$220K garage conversion, AEGB mandatory.
Singapore BTO Keys-Collection Renovation — The 8-Week Plan
BTO keys-collection renovation sequencing. 3-year hacking restriction, BCA CR06 + HDB RRC dual-registration filter, LEW trigger math, SCDF household-shelter rules, statutory noise hours, CaseTrust-RCMA 20% deposit protection. $25K-$80K+ by flat size.
Berlin Altbausanierung — Gründerzeit renovieren
Gründerzeit Altbau-Sanierung in Berlin. Meisterpflicht HwO Anlage A, Handwerkskammer-Registereintrag, Denkmalschutz + Milieuschutz (73 Gebiete), § 559 BGB Modernisierungsumlage, GEG § 48 10%-Regel, AfA § 7i EStG. €1.400-€2.200/m².
Chicago Condo Renovation — IL IDFPR + Board Alteration Agreement
Illinois has no state GC license — Baily verifies Chicago DOB registration + IDFPR plumbers/roofers + COI + IL Workers' Comp instead. 765 ILCS 605/18.4 board authority, Chicago Landmarks Ordinance, RLTO rental obligations, pre-1978 EPA RRP certification. $40K-$350K+.
Toronto Laneway Suite Construction — CPLS + HCRA + Tarion
Toronto CPLS by-law 2018 + Garden Suites expansion 2022. HCRA builder licensing + Tarion 1/2/7-year warranty, Committee of Adjustment minor variance, Heritage + ravine overlays. CAD$350K-$550K mid-finish laneway, ESA electrical + TSSA gas mandatory.
Seattle ADU + DADU Construction — 2019 Ordinance + WA L&I
Seattle 2019 ADU Ordinance (HALA) allows 2 ADUs per SFR lot. WA L&I contractor bonding $12K+, SDCI permit 4-8 weeks (+Design Review if 1,000+ sqft), 2024 Seattle gas ban requires heat pump, Tree Protection Ordinance + ECA overlays. $180K-$400K DADU, $80K-$150K garage AADU.
Brickell Condo Kitchen Remodel — HOA + SIRS + Post-Tension Reality
Brickell condo kitchens have unique constraints: post-tension concrete slab (NO structural hacking), plumbing risers fixed vertically, wet-wall stacking rules, HOA alteration agreement + SB 4-D Milestone/SIRS impact, service-elevator booking 4-8 weeks ahead. $60K-$180K mid-to-premium, Spanish-fluent GC preferred (68% Hispanic Miami-Dade).
Sydney Renovation — NSW HBL + HBCF Insurance + Fair Trading
NSW Home Building Act 1989 mandatory licensing over A$5K + HBCF compulsory insurance over A$20K. Fair Trading Builder classes, CDC (5-10 day) vs DA (3-6 month) permit paths, Strata Schemes Management Act 2015 for apartments, BAL bushfire ratings, heritage + coastal overlays. A$100K-$750K+.
Houston Whole-Home Renovation — Post-Harvey Chapter 19
Houston whole-home reality: no zoning but deed restrictions bind, post-Harvey Chapter 19 elevation (500-yr +2 ft, 100-yr +1 ft), gumbo clay foundation, TDLR sub-trade verification, four-bayou drainage design, WPI-8 on coastal builds. $180K-$650K.
Remodelación de Casa Completa en Houston — Capítulo 19 Post-Harvey
Remodelación completa Houston: sin zonificación pero con restricciones de escritura, elevación post-Harvey Capítulo 19, suelo gumbo, TDLR para subcontratistas, diseño de drenaje de bayous. $180K-$650K. Un contratista verificado, no doce.
SF Victorian Whole-Home Renovation — Balloon Framing + K&T + Planning
SF Victorian gut reno. Balloon framing pre-1920 fire-spread risk, knob-and-tube rewire $25K-$60K, galvanized plumbing re-pipe $20K-$45K, EPA RRP lead abatement, cripple-wall + chimney seismic retrofit, SF Planning Article 10/11 discretionary review, Rent Ordinance §37.9 passthrough block. $350K-$1.2M.
London Rear Extension — GPDO Class A, Prior Approval, Party Wall
The biggest London home-improvement keyword after loft conversion. GPDO 2015 Class A 3m/4m PD limits, 6m/8m Prior Approval + Neighbour Consultation Scheme, Article 4 Directions by borough, Party Wall Act §3/§6/§10, structural steels, Part L 2023 + Future Homes Standard. £75K-£250K.
Denver ADU Builder — Group Living + Municipal GC + DORA Trades + WUI
Colorado has no statewide GC license. Denver Class A/B/C/D municipal contractor licensing, CO DORA licenses trades only (electricians + plumbers), Denver 2022 Group Living, WUI Chapter 7A foothill ignition-resistant, radon-resistant construction, CZ 5B thermal envelope. $45K-$350K ADU.
Sydney Home Extension — CDC vs DA, BASIX, BAL, Strata
Sydney rear/second-storey/granny-flat extensions. Complying Development Certificate (5-20 business days) vs Development Application (6-18 weeks), BASIX mandatory, 33 LGAs with 33 LEPs, BAL bushfire overlay, Strata Schemes Management Act for apartments. A$180K-A$800K.
Melbourne Renovation — VBA + Domestic Building Insurance + VicSmart
VBA builder class DB-U/DB-L/DB-M, Domestic Building Contracts Act 1995, Domestic Building Insurance (A$16K+ threshold, NOT HBCF), VicSmart 10-business-day planning, 79 Melbourne council planning schemes, 6-Star+ energy mandatory, BAL on rural-fringe. A$180K-A$1.8M.
London Basement Conversion — RBKC CL7, BIA, Party Wall §6
London downward extension. Planning always required (no PD), RBKC Basement Impact Assessment + Policy CL7 single-level limit, Westminster + Camden restrictive policies, BIA £12K-£45K, Party Wall §6 triggers on every excavation, BS 8102:2022 Type A+C, NHBC/LABC warranty. £200K-£900K typical; luxury Notting Hill/Hampstead £1.2M-£5M+.
Vancouver Laneway House + Seismic — 2024 By-law, BC Step Code, HPO
First Vancouver pillar. 2024 laneway by-law expansion (2-storey, basement, corner-lot), BC Energy Step Code 3+ mandatory, high seismic zone retrofits for pre-1980 houses, HPO Residential Builder Licensing + 2-5-10 warranty, Tree Protection By-law 9958, no strata-title (unlike Toronto). CAD$450K-$850K.
Singapore HDB Resale Renovation — No Hacking Ban, RRC, S$10K-S$180K
Singapore's 2nd pillar. HDB resale (vs BTO): NO 3-year hacking ban, structural walls still off-limits, HDB Renovation Permit + BCA CR06 + HDB-RRC + LEW + PUB-licensed plumber. Asbestos in pre-1980s flats. CaseTrust-RCMA S$10K deposit cap. 8-12 week typical reno. S$10K-S$180K by flat type.
London Side-Return Extension — GPDO Class A, Article 4, Party Wall §6
London's 5th pillar. Side-return = Victorian/Edwardian terrace alley filled. 2nd-highest London keyword (5,400 MSV after rear-extension's 9,900). GPDO 2015 Class A typical PD, Article 4 trap in Hackney/Camden/Islington, Party Wall Act §1/§2/§6 always triggered, RSJ + lateral restraint + foundation underpinning, Part L 2023 + 2025 Future Homes Standard. £30K-£350K wrap-around.
Phoenix Kitchen Renovation — AZ ROC, BSD Permits, GFCI/AFCI, $15K-$400K
Phoenix's 2nd pillar (joins /phoenix/adu). Arizona Registrar of Contractors B-1/B-2 + R-class licensing under ARS Title 32, Phoenix Building & Safety Department plan-check 4-12 weeks, kitchen-specific code (GFCI/AFCI/dedicated circuits/range hood), MPC ARC approval (Anthem/Verrado/Estrella), summer heat construction reality, asbestos pre-1980 + lead paint pre-1978 traps. $15K-$400K.
Austin Home Addition — DSD Permits, Tree Code, Floodplain, $80K-$900K
Austin's 2nd pillar (joins /austin/home-initiative-adu). Texas no-state-GC reality + TDLR, City of Austin Development Services Department plan-check 6-14 weeks, Tree Protection Ordinance Chapter 25-8 (19"+ DSH threshold), floodplain elevation 1 ft above BFE, Heritage Conservation Districts (Hyde Park, Bouldin, Old West Austin), summer heat construction. $80K-$900K.
Chicago Tuckpointing — Freeze-Thaw, Type N vs O Mortar, $8K-$80K+
Chicago's 2nd pillar (joins /chicago/condo-renovation). Freeze-thaw cycle reality 100+ cycles/year, bungalow + greystone + worker's cottage + two-flat masonry stock, Type N vs Type O vs Type K mortar selection (ASTM C270, NPS Preservation Brief 2), CDOB permit + licensed mason, Chicago Landmarks + CHRS contributing-property trap, EPA RRP lead-safe pre-1978. $8K-$80K+.
San Diego ADU + JADU — CCHS Bonus Density, CSLB, CA State Framework, $180K-$600K
San Diego's 2nd pillar (joins /san-diego/coastal-commission-renovation). California state ADU framework (AB 68/881/2221/SB 897) state-pre-emption, Complete Communities Housing Solutions (CCHS) bonus-density tiers 1-4, detached vs attached vs JADU (owner-occupancy gone), DSD electronic plan review, CSLB Class B + HCD-approved prefab pathway, Mills Act + coastal overlay traps. $180K-$600K+.
Atlanta Basement Waterproofing + Finishing — Clay, Hydrostatic, $8K-$80K
Atlanta's 2nd pillar (joins /atlanta/gsblc-historic-renovation). Piedmont red clay + hydrostatic pressure reality, interior vs exterior waterproofing cost trade-off, French drain + sump + vapor barrier stack, GSBLC residential contractor licensing via SOS, GSWCC erosion control, Atlanta Office of Buildings permits, EPA Radon Zone 2 ASD mitigation, IRC R310 egress + 7' ceiling minimums. $8K-$80K+.
London Kitchen Extension — GPDO Class A, Steel Spans, Part L 2023, £75K-£180K
6m wraparound vs 4m rear economics (£75K-£180K all-in), GPDO Class A + Article 4 borough list, 5-7m steel-span calculations to Eurocode 3, LABC vs Approved Inspector, Gas Safe isolation sequence, Part F 2023 cooker-hood extract reality, Part L 2023 fabric U-values, 16-24 week build programme. The design-permit-build vs cowboy build-retrospective sequence. Cites GPDO 2015, Party Wall Act 1996, AD Parts A/B/C/F/L/P, Building Safety Act 2022.
Sydney Granny Flat — SEPP 2009, 60m² + 12m setback, CDC 20-day, A$165K-A$280K
NSW SEPP (Affordable Rental Housing) 2009 — 60m² limit, 12m setback, 3m boundary, single-occupancy lease split rules, BASIX 7-star certificate, Complying Development Certificate vs DA, 20-day CDC turnaround, post-completion HBCF cover, A$165K-A$280K. Cites Home Building Act 1989, RTA 2010 tenancy split rules.
Auckland Minor Dwelling — AUP H3-H6, 65m² GFA Cap, LBP, NZ$180K-NZ$450K
Auckland Unitary Plan H3/H4/H5/H6 zone activity status, 65m² GFA cap inclusions/exclusions, dev standards (site coverage 40-45%, impervious 60-70%, HIRB 2.5m+45°, height 8-11m), Resource Consent vs Building Consent separation, NZBC Acceptable Solutions B1/C/D/E1/E2/E3/F7/G4/G12/H1, H1/AS1 Nov-2022 R6.6 ceilings uplift, LBP Restricted Building Work, Watercare + Auckland Council dev contributions NZ$22K-NZ$65K. 4 cost tiers NZ$180K-NZ$450K.
Phoenix Kitchen Remodeling — ROC B-3, HOA Design Review, $35K-$140K
Phoenix PDD permit lane (SHAPE PHX), ROC B-3 + KB-2 + R-11 + R-37 license stack, HOA architectural review gate in Ahwatukee/Arcadia/Desert Ridge, monsoon schedule trap, scope tiers from $35K refresh to $140K+ architectural remodel.
Phoenix HVAC Heat-Wave Retrofit — Load Calcs, SEER2, Mini-Split Additions, $12K-$45K
Manual J load calculations vs same-tonnage swap, 2023 DOE SEER2 14.3 minimum Southwest region, R-410A → R-454B A2L refrigerant transition (Jan 1 2025), APS/SRP + 25C + HEEHRA rebate stack, variable-speed vs two-stage economics.
Phoenix Pool + Spa Construction — ROC CR-6, Pool Barrier Code, HOA Review, $55K-$180K
ROC CR-6 Swimming Pools license requirement, ARS 36-1681 statewide pool barrier code + Phoenix double-fence amendments, gunite vs fiberglass economics, Scottsdale/Paradise Valley/Tempe/Gilbert/Chandler suburban amendments, 13-22 week construction timeline.
Miami Kitchen + Hurricane-Impact Retrofit — HVHZ, NOA, FL CILB, $65K-$220K
Why Miami kitchens couple to hurricane retrofit — HVHZ (Miami-Dade + Broward) NOA product requirements, OIR-B1-1802 wind-mit 10-45% premium credit, SB 4-D post-Surfside milestone reality, SB 2-A AOB reform. $65K-$220K scope tiers.
Miami ADU + Granny Flat — Miami 21 Zoning, HVHZ, Flood Zone, $165K-$450K
Florida has no statewide ADU law — Miami 21 T3 zoning rules, Coral Gables/Miami Beach/Pinecrest per-jurisdiction frameworks, HVHZ compliance on small new structures, flood-zone AE/VE elevation math, Miami-Dade WASD impact fees, $165K-$450K build.
Miami Pool + Patio Construction — Pool Barrier, HVHZ, Flood-Zone, $75K-$240K
Florida Chapter 515 pool-safety barrier triad (perimeter fence OR door alarms + cover OR window alarms + cover), HVHZ pool cage engineering for 170-180 mph wind, flood-zone equipment-pad elevation, Miami-Dade DERM coordination on groundwater, $75K-$240K+ scope tiers.
Chicago Basement Finishing + Waterproofing — Hydrostatic Pressure, CDOB Permits, $30K-$140K
Why Chicago basements are wet — Blue Clay hydrostatic pressure, high water table, combined sewer overflows. Interior drain-tile + sump + backup vs exterior waterproofing economics, CDOB egress-window code, $30K-$140K finishing tiers with phased waterproof-then-finish sequencing.
Austin ADU + Accessory Dwelling — HOME Initiative, DSD, TDLR, $180K-$420K
HOME Initiative Phase 1 + 2 (Dec 2023 + May 2024) by-right ADU framework, Texas no-state-GC licensing reality — TDLR + TSBPE + COI + TWCA + City of Austin registration, Tree Protection Ordinance Chapter 25-8 CRZ math (the #1 budget-killer), AEGB requirements, $180K-$420K+ scope tiers.
Compliance Hubs
NYC Co-op Alteration Agreement — Homeowner Guide
The real 40–80 page legal document your co-op board hands you. DCWP + DOB + DOS triad, Local Law 97 heat-pump mandate, LPC decision tree for landmark districts, and the 7 alteration-agreement requirements no one explains.
London Party Wall + Basement Guide
Party Wall Act 1996 §§ 3, 6, 10 — the real surveyor cost trap. Basement excavation at £3,500–£6,000/m², BIA components, CDM 2015 domestic-client duties, and BS 8102:2022 Type A + Type C waterproofing reality.
Dubai Developer NOC Guide — Emaar, Nakheel, Damac + DM + DCD + DEWA
The 4-authority stack no Dubai homeowner expects: Developer NOC → DM Trakheesi → DCD fire-safety → DEWA load. Decree No. 2 of 2020, Emaar 3-5 day NOC, tenure-first intake (freehold vs leasehold), Resolution 11 of 2025 free-zone mainland ops. VAT flat 5%.
San Francisco Soft-Story Retrofit — CAPSS Tier Compliance
SF 2013 Mandatory Soft-Story Ordinance (Chapter 34B). Tier I-IV deadlines 2017-2020 in active enforcement with DBI liens on non-compliant properties. $60K-$150K typical retrofit. Rent Ordinance §37.9 blocks capital-improvement passthrough. One CSLB B contractor.
Dallas General Contractor Licensing — No State GC License
Texas has no statewide residential GC license. Baily verifies TDLR-licensed electricians (Occ. Code §1305), HVAC (§1302), TSBPE plumbers (§1301), irrigators, plus Dallas BID permit history, COI, bonding, and foundation track record on black-clay soil. $150K-$500K+ whole-home.
Hong Kong Renovation — Authorized Person, RSE, RGBC
Buildings Ordinance Cap. 123 mandatory Authorized Person appointment. Three AP classes (HKIA Architect / HKIE RSE / HKIS Surveyor), Registered Structural + Geotechnical Engineers, RGBC contractor licensing, Minor Works Control System Class I/II/III tiers, Lands Dept lease review. HK$500K-HK$3M.
Boston Back Bay Brownstone — CSL + HIC + BBAC + Lead Law
Massachusetts CSL (Restricted vs Unrestricted) + HIC dual licensing, Back Bay Architectural Commission + BHAC + South End parallel commissions, ISD permit 8-14w + BBAC 3-4mo exterior, MGL c.111 §199A lead strict-liability, MA DEP + NESHAP asbestos, pre-war cast-iron + rubble structural. $350K-$1.5M.
DC Row House Renovation — HPRB + DOB + DLCP + Lead-Safe
DC DOB replaced DCRA in 2022. HPRB vs HPO review tracks, Commission of Fine Arts + NCPC federal viewshed overlay, DLCP Home Improvement Contractor + Master Electrician/Plumber/HVAC stack, DC Lead Hazard Prevention Act, 55+ historic districts. $450K-$1.4M row house.
Permis ABF à Paris — 94% du centre en périmètre, délai 2-4 mois
94% du Paris intra-muros est en périmètre de protection ABF. Avis simple vs conforme, délai 2-4 mois, seuils DP ≤20m² vs PC >20m², matériaux autorisés (pierre, chaux, menuiseries bois), obligation ravalement L132-1 CCH tous les 10 ans.
NYC Condo Alteration — Fee-Simple, Not Co-op, DOB ALT-2, LL97
NYC condo alteration is a different legal regime from co-op. Fee simple title + percentage in common elements (Real Property Law Article 9-B), 10-25 page board agreement, DOB ALT-1/ALT-2/ALT-3 filings, Local Law 97 emissions, LPC if landmarked, shear-wall + sponsor-unit reality. $85K-$800K+.
Mumbai Flat Renovation — BMC IOD, Society NOC, MahaRERA
First India-market pillar. BMC Intimation Letter (15-30 days) vs Amended Plans (2-4 months), mandatory Society NOC under Maharashtra Coop Societies Act 1960, MahaRERA contractor verification, load-bearing vs RCC vs chawl typology, Coastal Regulation Zone in South Mumbai, IS 1893 Zone III seismic, monsoon waterproofing. ₹20L-₹2.5Cr.
LA HPOZ Renovation — 37 Districts, CoC, Cultural Heritage Commission
First LA Phase 17 pillar — Netanel Presman CSLB #1105249 reviewed. 37 Historic Preservation Overlay Zone districts, LAMC §12.20.3, Certificate of Compatibility review (HPOZ Board → Planning → CHC), Contributing vs Non-Contributing status, Secretary of Interior Standards. $350K-$1.8M.
LA Post-Fire Rebuild — SB 1103 Like-for-Like, CBC 7A WUI, Palisades + Eaton
2025 Palisades + Eaton fire rebuild guide — Netanel Presman reviewed (worked Palisades jobs). SB 1103 like-for-like CEQA exemption, Governor EOs N-25-24/26/27, LADBS Tier 1/2/3 plan-check, CBC Chapter 7A WUI, debris clearance + soil testing, insurance ALE+DR+PP+Ordinance-or-Law. $350-$900/sqft.
LA ADU Sale Under AB 1033 — Condo-Convert + Tract Map + CC&Rs
AB 1033 (CA, 2024) lets homeowners sell ADUs separately as condos. LA opted in via Ordinance 187712 July 2024. 9-step process: build → Tract Map → Davis-Stirling CC&Rs → lender consent → Subdivision Map Act → record. Fannie/Freddie conforming-loan trap. +$25K-$55K incremental. Netanel reviewed.
LA Hillside Construction — LAMC §12.21 C.10, Caissons, $1.2M-$25M+
Baseline Hillside Ordinance covers 67,000 LA parcels. Hollywood Hills, Bel Air, Pacific Palisades, Encino Hills, Mount Washington. RFA sliding scale, grading cut/fill, 28-36 ft height from natural grade, LAFD 20% driveway grade max, Mulholland Specific Plan overlay, $25K-$80K caissons. $1.2M-$25M+. Netanel reviewed.
LA SB 9 + ADU Combined — One Lot Up to 8 Units, $3.3M-$8M
SB 9 (2022) urban lot split + 2-unit-per-parcel + ADU + JADU = up to 8 units on a former single-family lot. LA Ordinance 187119, 3-year owner-occupancy affidavit, Anti-Displacement Provision, HPOZ + coastal + VHFHSZ exemptions. Real-world yield 3-6 units. $3.3M-$8M project. Netanel reviewed.
Tokyo Mansion Renovation — 管理組合 + 一級建築士 + 区分所有法
First Japan-market pillar. 分譲マンション = condo (not luxury house). Common-parts vs exclusive-parts under 区分所有法 Condominium Act, 管理組合 management association approval, LL-45/LL-40 floor-soundproofing, pre-1981 旧耐震 vs post-1981 新耐震, Class 1 Architect (一級建築士). ¥5K-¥1M per sqm.
NYC Local Law 97 — Building Emissions, $268/CO2e Penalty, BSAR
NYC's 4th pillar. Local Law 97 (2019) emissions limits for ~50,000 buildings >25,000 sqft. Phase 1 (2024-2029) + Phase 2 (2030-2034) tighter, $268/ton CO2e penalty, BSAR annual reporting via NYC DOB, three pathways (under cap / RECs / Article 321), heat pump retrofits + envelope + lighting. $1.5M-$8M typical.
San Diego Coastal Renovation — Coastal Act, CDP, La Jolla, $250-$3,000+/sqft
First San Diego pillar — opens 26th city. CSLB applies (Netanel attribution). California Coastal Act 1976, CDP via City LCP or Coastal Commission, La Jolla / Coronado / Encinitas / Del Mar / Cardiff coastal zone, sea-level-rise vulnerability, public access easements §30210, salt-air corrosion + ASCE 7 wind. $250-$3,000+/sqft.
Tel Aviv Tmas 38 (תמ"א 38) — Strengthening vs Demolition-Reconstruction
First Israel-market pillar. Tmas 38 (תמ"א 38) earthquake-retrofit national plan: Tmas 38/1 strengthening (2/3 owner consent) vs Tmas 38/2 demolition + reconstruction (80% consent). Kablan Ressom (קבלן רשום) + Architect + Civil Engineer + Mefakeach Bniyah licensing stack. 2022-2024 reform impact. 12-36 month construction.
Seoul Aparteu Remodeling — 입주자대표회의 + 전문건설업 + 공동주택관리법
First Korea-market pillar — APAC pair with Tokyo. 아파트 (aparteu) high-rise condo. Apartment Management Act (공동주택관리법), Resident Representative Council (입주자대표회의) approval, common-parts (공용부분) vs exclusive-parts (전유부분), Construction Industry Framework Act + Specialty Construction Business (전문건설업) license. ₩100K-₩2.5M per pyeong.
Atlanta Renovation — GSBLC + AUDC Historic Review + Tree Ordinance
First Atlanta pillar — opens 28th US state (GA). Georgia State Licensing Board for Residential & General Contractors (GSBLC) Title 43 Ch 41, Atlanta Urban Design Commission Certificate of Appropriateness for Inman Park / Druid Hills / Grant Park, Tree Ordinance Ch 158 ($5K+ trap), red Georgia clay foundation. $200-$1,400/sqft.
Reforma integral en Madrid — Licencias urbanísticas, COAM, IVA 10%
First Spain-market pillar — es-ES native. Tres categorías de licencia urbanística (Comunicación Previa / Declaración Responsable / Licencia Ordinaria), COAM arquitecto colegiado, Ley de Propiedad Horizontal, Plan Especial Centro Histórico, CTE DB-HE eficiencia, IVA 10% reducido. 250-3.500€/m².
Bangkok Condo Renovation — Juristic Person, BMA Permit, 49% Cap, PDPA
First Thailand-market pillar — opens SEA outside SG/HK. Condominium Act B.E. 2522 personal-vs-common property, Juristic Person (นิติบุคคลอาคารชุด) approval, 49% foreign-ownership cap reality, BMA building permit through 50 district offices, Thai contractor licensing (no nationwide GC license like CSLB), 2024 PDPA. 8K-120K THB/sqm.
Las Vegas Renovation — NSCB Licensing, HOA ARC, Caliche Soil
First Las Vegas pillar — opens Nevada. Nevada State Contractors Board (NSCB) Class A/B/C under NRS Chapter 624 + bonding $5K-$50K, master-planned community Architectural Review Committee approval (Summerlin/Henderson/Cadence), caliche soil + extreme heat construction realities, SNWA WaterSmart Turf Replacement, Class B-2 specialty pool. $150-$2,000/sqft.
Portland Renovation — Oregon CCB, BDS Permits, Historic Landmark Commission
First Portland pillar — opens Oregon (29th US state). Oregon Construction Contractors Board (CCB) ORS Ch 701 + bonding $20K, Portland Bureau of Development Services permits, Historic Landmark Commission for Ladd's Addition / Alphabet District / Eastmoreland, Residential Infill Project (RIP) 2021 plex by-right, Cascadia seismic retrofit. $200-$1,000/sqft.
Reabilitação em Lisboa — RJUE, ARU, IVA 6%, IMPIC, Ordem dos Arquitetos
First Portugal pillar — pt-PT native (European Portuguese). Comunicação Prévia vs Licença de Obras (RJUE), 87+ Áreas de Reabilitação Urbana com IVA 6% reduzido + IMI bonificado, IMPIC empresas habilitadas, Ordem dos Arquitetos + Engenheiros, DGPC para imóveis classificados, REH eficiência energética + Certificado Energético. 350-8.000€/m².
NYC Rent-Stabilized Renovation — HSTPA 2019, $89,565 IAI Cap, MCI 2%
NYC's 5th pillar. Distinct B2B-adjacent audience: landlords + management companies of ~1M rent-stabilized units. HSTPA 2019 reformed Individual Apartment Improvement (IAI) lifetime cap $89,565 + 1/168 or 1/180 formula, Major Capital Improvement (MCI) 2% annual cap + 35%-stabilized threshold, HCR DHCR registration. $25K-$200K per unit.
Berliner Mietshaus-Modernisierung — § 559 BGB, 8 % Umlage, Härtefall, GEG
Berlins zweiter Pillar. Vermieter:innen + Hausverwaltungen. § 559 BGB Modernisierungsumlage 8 %/Jahr + 2 €/m² Kappung in angespannten Märkten (Berlin), Modernisierungsankündigung § 555c, Härtefallregelung § 559 Abs 4, GEG 65 %-Erneuerbare-Heizungs-Pflicht, Milieuschutz Berlin (73 Gebiete), KfW 261 + BAFA + IBB Förderung. 600-3.500 €/m².
NYC Loft Law Renovation — Article 7-C, IMD Buildings, SoHo/Tribeca
NYC's 6th pillar. NY Multiple Dwelling Law Article 7-C governs ~5,000+ legalized loft units in SoHo / Tribeca / DUMBO / Williamsburg / LIC. NYC Loft Board IMD vs Legalized status, Final Compliance Application $100K-$500K+ per unit owner work, LPC Certificate of Appropriateness in landmark districts, post-legalization rent stabilization. $100K-$1.5M tenant-paid.
Toronto Secondary Suite Legalization — Bill 23, OBC 9.9.10, Tarion
Toronto's 2nd pillar. Distinct from /toronto/laneway-suite (detached). Secondary suites = basement apartments + in-law suites inside existing house. Ontario Bill 23 More Homes Built Faster Act + 3-units-per-lot as-of-right, OBC 9.9.10.1 egress windows, fire separation 5/8" Type X, HCRA + Tarion 2-5-10, MPAC reassessment. CAD$15K-$450K.
Sydney Strata Renovation — Sections 109/110/111 SSMA, Special Resolution
Sydney's 3rd pillar. NSW SSMA 2015 cosmetic (Section 109, no approval) / minor (Section 110, written OC approval) / major (Section 111-112, 75% special resolution) categorization. Form 17 application, by-law compliance, common property vs lot property, AS ISO 717.2 IIC 50+ acoustic, waterproofing membrane ownership reality. A$25K-A$800K+.
LA Title 24 Compliance — 2025 Standards, Heat Pump Mandate, NEM 3.0
LA's 7th pillar (Netanel-attributed). California Title 24 Part 6 + Part 11 CALGreen perpetual concern. 2025 Standards (effective Jan 2026) heat pump mandate, NEM 3.0 solar economics requiring battery storage, HERS rater verification, LADBS Cool Roof Ordinance §99.04.106.1, AB 1279 net-zero 2045 mandate. $1,500-$60K compliance + retrofit cost.
LA Baseline Mansionization Ordinance — FAR 0.45, 45° Envelope, R1
LA's 6th pillar (Netanel-attributed). LAMC §12.21 BMO under 2008/2017/2024 amendments. FAR 0.45 + 50% lot coverage + 45° envelope + 28/32 ft height + setbacks for ~250,000 R1 single-family parcels. Cheviot Hills, Brentwood flats, Encino flats, West LA. AHRO + Density Bonus + SB 9 + AB 1033 exemptions. $400-$700/sqft + $8K-$25K variance.
Boston Condo Alteration — MGL c.183A, Trustee Approval, ISD Permits
Boston's 2nd pillar (joins /boston/back-bay-brownstone, distinct condo audience). MGL Chapter 183A Massachusetts Condominium Act, Master Deed + By-Laws + Trustee approval process, common-vs-limited-common-vs-unit-interior distinction, ISD permit + plan-check, MA CSL + HIC + Lead-Safe, hardwood/HVAC/window trustee restrictions. $40K-$2M+ Seaport luxury.
Dallas Foundation Repair — Black Clay Reality, Concrete Piers, $5K-$100K+
Dallas's 2nd pillar (joins /dallas/tx-licensing-contractor). Black-clay (smectite/montmorillonite) soil expansion/contraction reality, pier-and-beam vs slab-on-grade failure modes, concrete pressed pilings + steel + helical piers, Texas PE engineer-stamped plans (TBPELS), drainage correction, homeowner insurance exclusion trap. $5K-$100K+.
Seattle Seismic Retrofit — Bolt+Brace, Cripple Walls, URM, $3K-$60K
Seattle's 2nd pillar (joins /seattle/adu-dadu). Cascadia Subduction Zone + Seattle Fault reality, Project Impact Bolt+Brace + Emergency Home Retrofit (EHR) standard to FEMA P-50, cripple wall shear-panel + 5/8" anchor bolts + shear-transfer, SDCI permit process, URM mandatory ordinance debate (1,165+ URM buildings). $3K-$60K+.
London Victorian Terrace Renovation — Lath, Lime, Article 4, Listed Building Consent
Victorian fabric (lath-and-plaster, lime mortar, sash windows), CIGA cavity-fill incompatibility on solid walls, Article 4 conservation areas + Listed Building Consent triggers, damp triage (rising/penetrating/condensation), PAS 2035:2023 retrofit pathway, Part L 2023 solid-wall U-values, MEES/EPC constraints. £1,800-£4,800/m². Cites Planning (LBCA) Act 1990, GPDO 2015, BS 7913:2013, BS 5250:2021, AD Part L 2023, Historic England.
Dubai Villa Renovation — Trakheesi, NOC Chain, Civil Defence, AED 350K-AED 1.8M
Trakheesi platform (DM permit portal), 3 permit categories (Light/Heavy/Addition), villa typology (freehold Arabian Ranches/Emirates Hills/Palm Jumeirah, leasehold Mira/Mudon, Emirati villas), 4-step NOC chain (Master Developer → Community → DEWA → Civil Defence), Decree 2/2020 Articles 3/7/12/18, G+1/G+2 classification, RC slab structural reality, >300m² Civil Defence trigger, 6 scope-tier costs AED 350K-AED 1.8M.
Dubai Apartment Fit-out — OA NOC, Trakheesi Light, DEWA MEP, AED 85K-AED 380K
OA NOC primacy over Trakheesi for JBR/Marina/Downtown/Business Bay towers, Law 27/2007 JOP, Light vs Heavy Refurbishment workflow, common-shaft restrictions (chiller/DHW/soil stacks), DEWA MEP approvals, freehold vs leasehold tenant-vs-owner permit responsibility, STC 50+ / IIC 55+ acoustic minimums, 6 scope-tier costs AED 85K-AED 380K. Cites DM Building Code, Decree 2/2020, Decree 26/2007, UAE Fire Code 2018.
Sydney Knock-Down-Rebuild — NSW LEP, FSR, HBCF, Heritage S60, A$650K-A$1.4M
NSW LEP zoning + Floor Space Ratio caps, WorkCover demolition + NSW Asbestos Code 2008, HBCF (Home Building Compensation Fund) for >A$20K work, R-Code subdivision, Section 60 Heritage triggers, sloping-site soil testing, A$650K-A$1.4M typical. Cites EP&A Act 1979, Home Building Act 1989, Heritage Act 1977 NSW, BCA.
Melbourne Period Home Restoration — Heritage Overlay, VBA, Section 137B, A$280K-A$650K
Victorian/Edwardian/Federation typology (1850-1940), Heritage Overlay (HO) under Victoria Planning Provisions VPP 43.01, Council vs Heritage Victoria triggers, lath-and-plaster repair, Baltic pine flooring, original tessellated tiles, slate roofing reinstatement, VBA registered builder >A$10K, Section 137B owner-builder, A$280K-A$650K. Cites Heritage Act 2017, Planning & Environment Act 1987.
Melbourne Domestic Building Insurance — DBCA 1995, A$16K Trigger, VMIA 10/20yr Cover
Domestic Building Contracts Act 1995, mandatory DBI for >A$16K, VBA registered builder triggers >A$10K, BICSA → VMIA 2019 replacement, 10/20-year coverage on structural defects, owner-builder DBI carve-outs, dispute resolution via VCAT/DBDRV, claim caps A$300K, who-pays-what timing.
Singapore Condo Renovation — BMSMA, MCST Deposit, BCA Permits, S$45K-S$120K
BMSMA MCST authority + S$2K-S$5K refundable deposit, BCA structural permits, cement-screed hacking triggers, waterproofing class + 24h ponding test, EMA Licensed Electrical Worker rules, PUB plumber licensing, strata vs common-property wall decision tree, MCST fine schedule, Strata Titles Board appeals. S$45K-S$120K across cosmetic/mid/full/premium tiers.
Singapore Landed Property Rebuild — URA GCB, BCA Green Mark, S$2.5M-S$8M
URA Master Plan zoning + all 39 gazetted GCB areas (1,400m² minimum / 18.5m width / 35% site coverage / 2-storey cap), envelope control non-GCB, conservation house Section A/B/C 25-60% cost premium, BCA Green Mark Platinum mandatory >5,000sqft dwellings, basement underpinning S$2.5K-S$6K/lm, Written Permission vs Permit to Construct sequence, S$2.5M-S$8M.
Auckland Leaky Home Recladding — WHRSA, Section 393 10-yr Longstop, NZ$184K-NZ$450K
1994-2005 monolithic crisis (42K-89K affected homes), Building Act 2004 Section 393 10-year longstop (most pre-2016 homes time-barred), MBIE WHRS framework + closed FAP, why monolithic failed (untreated H1.2 timber + face-fixed cladding + zero-eaves), Auckland Council Building Consent + PS1/PS2/PS3/PS4, NZBC E2/AS1 drained-cavity, 4 replacement systems (EPS/fibre cement/timber/aluminium). 200m² home: NZ$184K-NZ$450K.
London Mews House Renovation — Article 4, Estate Covenants, BS 8102:2022, £180K-£550K
Mews typology (former coachmen quarters, narrow 4-5m frontage, cobble streetscape), Article 4 Direction stripping PD across Belgravia/Mayfair/Kensington, Grosvenor/Cadogan/Howard de Walden estate covenants, BS 8102:2022 Grade 3 basement waterproofing, three-to-four-neighbour Section 6 party wall reality, Grade II Listed Building Consent regime. £180K-£550K typical.
Sydney Heritage-Listed Renovation — SHR §60, LEP Sched 5, HCAs, A$420K-A$1.1M
Three heritage regimes (State Heritage Register Section 60, LEP Schedule 5 items, Heritage Conservation Areas), Section 157 Heritage Act penalty stack, Federation/Victorian/Edwardian/Art Deco identifiers, Statement of Heritage Impact (SoHI) authoring, HBCF icare insurance, Home Building Act 1989 contractor licensing tiers. A$420K-A$1.1M.
Melbourne Knockdown Rebuild — VBA, Section 137B, Section 29A, A$580K-A$1.3M
Section 29A Report and Consent, VBA DB-U registration >A$10K, VMIA DBI >A$16K, Section 137B owner-builder >A$16K limit, WorkSafe Compliance Code: Removing Asbestos (2018), EPA soil Phase 2 ESA on industrial reclassifications, VHR + Heritage Overlay stack, Property Law Act 1958 Section 84 covenant challenges, NCC 2022 7-star NatHERS. A$580K-A$1.3M (~3.3K MSV).
Singapore EC Renovation — Housing Scheme Act 1996, MOP, MCST, S$45K-S$125K
Executive Condominium Housing Scheme Act 1996, 5-year MOP vs 10-year privatisation, BMSMA 2004 MCST authority for EC blocks, BCA 5m² hacking threshold, URA facade write-in within MOP, PUB Licensed Plumber + EMA Licensed Electrical Worker, 9% GST, CaseTrust deposit protection. S$45K-S$125K across estates Punggol/Sengkang/Tampines.
Auckland Villa Restoration — AUP 33 SCAs, Kauri/Rimu, NZS 3604:2011, NZ$220K-NZ$580K
Auckland Unitary Plan 33 Special Character Areas demolition controls, 1880-1925 villa typology (kauri, rimu, totara timbers), original sash window restoration vs aluminium replacement economics, subfloor rejack + NZS 3604:2011 seismic upgrade, Section 112 Building Act trigger, LBP licensing, Master Build / Halo Guarantee. NZ$220K-NZ$580K. Suburbs: Ponsonby/Grey Lynn/Mt Eden/Devonport/Parnell.
Dubai Townhouse Renovation — OA + Trakheesi + DM, Law 6/2010, AED 165K-AED 480K
Townhouse typology (Arabian Ranches/Mira/Mudon/DAMAC Hills/JVC/JVT), 4-tier approval stack (OA → Master Developer → DM → Trakheesi), Law No. 6 of 2010 joint ownership, UAE Civil Code party-wall framework, DM contractor classification G+1/G+2, VAT 5% Federal Decree-Law 8/2017, Ministerial Resolution 44/2022 midday break. AED 165K-AED 480K typical.
NYC Condo Alteration Agreement Guide — RPL Article 9-B, DOB ALT-2, Local Law 97
NYC condo (not co-op) alteration agreements under Real Property Law Article 9-B, DOB ALT-2 filing through DOB NOW, Local Law 97 indirect effects on unit owners, wet-over-dry stacking rules, NYC DEP backflow prevention, $80K-$1.5M cost bands.
NYC Brownstone Restoration — LPC, DOB, Mortar + Stone, $180K-$1.2M
Brownstone facade restoration reality — Triassic-era sandstone, face-bedding failures, Portland-cement destruction of historic material. LPC Certificate of Appropriateness vs Certificate of No Effect paths, NHL 3.5 lime mortar specification, Dutchman stone replacement, cornice restoration, Park Slope + Clinton Hill + Bed-Stuy + Harlem.
Chicago Bungalow Restoration — Historic Bungalow Initiative, Masonry, $120K-$480K
80,000+ Chicago brick bungalows built 1910-1940. Chicago Historic Bungalow Initiative tax assessment freeze, Commission on Chicago Landmarks district review, NHL 3.5 mortar for soft historic brick, original sash window restoration vs vinyl replacement economics, EPA RRP lead-safe compliance, $120K-$480K+ scope.
Chicago Tuckpointing + Masonry — Lime Mortar, Type N vs O, Greystones, $12K-$95K
ASTM C270 mortar-type trap — Type S Portland cement destroying historic Chicago brick. NHL 3.5 natural hydraulic lime specification, mortar analysis methodology, Chicago bungalow vs greystone vs three-flat restoration patterns, cornice + parapet + chimney rebuild economics.
Austin Pier + Beam Foundation Repair — Expansive Clay, TSBPE Coordination, $12K-$85K
Central Texas expansive clay (PI 40-70+) reality — pier-and-beam vs post-tensioned slab diagnostics, pressed pier vs steel pier vs helical pier tradeoffs, TSBPE master plumber coordination under slab, drainage prevention layer, $12K-$85K+ engineering-led repair path.
More pillars in progress
Phase 17 is authoring 128 Tier-1 pillars across 16 cities through May–September 2026. Homeowners: start a scoping conversation with Baily on the homepage and we'll route you to the right guide — or the right vetted GC if your city's pillar isn't live yet.