ADU — Attached ADU Cost in Tampa, 2026

Why attached adu × Tampa produces this band

A attached adu scope for a adu in Tampa combines two price levers: scope and metro labor rates. Attached ADUs share a wall with the primary house. Needs its own entrance, fire-rated separation, and (in most jurisdictions) independent utility metering — but shares the site's foundation-extension cost. Against the national median remodel labor rate, Tampa runs 5% below the national median — so the attached adu band comes in 5% below the mid-range, then scales 5% below the national median on top of that. Permit timelines for residential work in Tampa typically run 4-10 weeks, which is the window you plan your design and decision sequence against. This page gives you the actual 2026 Tampa bands for this exact combination, plus the three cost drivers Baily asks about first when scoping the project live.

What drives cost for a attached adu scope

• ·Fire-rated wall assembly (typically 1-hour, sometimes 2-hour)
• ·Independent utility service drops
• ·Shared-wall sound isolation (STC 50+)
• ·Grading and drainage on the new footprint

What makes Tampa different

• Labor — HVHZ-adjacent — Tampa Bay code is Florida Building Code but not HVHZ; impact windows are optional (and insurance-incentivized) rather than required.
• Labor — Storm-season labor cycles similar to Miami but lower intensity.
• Labor — Retiree-homeowner demand drives steady remodel pipeline year-round.
• Material — Corrosion-resistant hardware recommended for coastal Pinellas and Hillsborough parcels.
• Material — Terracotta roof tile (common in mid-century Tampa Bay) restoration adds specialty material premium.

Tampa rules that affect this scope

• City of Tampa Construction Services Division issues permits — 4-10 week turnaround standard.
• Hillsborough and Pinellas Counties have separate permit processes for unincorporated areas — check jurisdiction before scoping.
• Florida Building Code 2023 wind design: 140 mph ultimate design wind speed in most Tampa Bay zones.
• Flood-zone VE and AE parcels (coastal + riverine) trigger elevation and utility-placement requirements.

Scope your adu with Baily.

Baily asks the eight questions that determine where your project lands inside the $162K-$343K band for Tampa and hands the scoped brief to one licensed builder.

Related pages

Questions LA homeowners actually ask

• What is the 2026 cost range for a attached adu scope adu in Tampa?

  $162,450-$342,950, with the median landing near $252,700. The range reflects finish tier and layout complexity within the attached adu scope; the Tampa labor multiplier of 0.95× vs national median is baked in.

• How long does a attached adu scope adu take in Tampa?

  22-32 weeks of on-site construction for the attached adu scope, plus 4-10 weeks of permit review in Tampa if the scope requires a permit. Cosmetic-only refreshes often skip permits; anything touching plumbing, electrical, or structural does not.

• What is the single biggest budget-overrun risk for this scope?

  Utility separation surprises — some markets require a new electrical service drop from the street, not just a sub-panel. Utility-company coordination adds 6-10 weeks and $8-14K.