ADU — Attached ADU Cost in New York City, 2026

Why attached adu × New York City produces this band

A attached adu scope for a adu in New York City 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, New York City runs 65% above the national median — so the attached adu band comes in 5% below the mid-range, then scales 65% above the national median on top of that. Permit timelines for residential work in New York City typically run 10-22 weeks, which is the window you plan your design and decision sequence against. This page gives you the actual 2026 New York City 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 New York City different

• Labor — NYC DOB-licensed general contractors and plumbers carry the highest hourly rates in the U.S. (roughly 1.8× national median).
• Labor — Union jurisdiction is strict — electrical work in most five-borough multi-family requires Local 3 IBEW.
• Labor — Hoisting and delivery logistics add labor time on everything delivered above the 5th floor.
• Material — Cabinet and stone slab delivery into Manhattan often requires after-hours crane crews — 15-25% uplift vs suburb.
• Material — Dumpster and construction-debris permits are metered daily.

New York City rules that affect this scope

• NYC DOB requires a Registered Design Professional (RA or PE) on permit submissions for most kitchen and bath work.
• Co-op and condo alteration agreements typically require a 12-18% owner contribution for building-wide risk (separate from the NYC permit).
• Local Law 152 gas-piping inspections affect any remodel touching gas lines.
• Pre-war rent-stabilized units have separate tenant-protection filings that add 3-8 weeks to the alteration path.

Scope your adu with Baily.

Baily asks the eight questions that determine where your project lands inside the $282K-$596K band for New York City 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 New York City?

  $282,150-$595,650, with the median landing near $438,900. The range reflects finish tier and layout complexity within the attached adu scope; the New York City labor multiplier of 1.65× vs national median is baked in.

• How long does a attached adu scope adu take in New York City?

  22-32 weeks of on-site construction for the attached adu scope, plus 10-22 weeks of permit review in New York City 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.