ADU — Detached 2-bedroom Cost in San Francisco, 2026

Why detached 2-bedroom × San Francisco produces this band

A detached 2-bedroom scope for a adu in San Francisco combines two price levers: scope and metro labor rates. A detached 2-bedroom ADU runs 900-1,200 SF with two bedrooms, 1.5-2 baths, in-unit laundry, and usually its own HVAC system. Treated as a small single-family residence on the permit track. Against the national median remodel labor rate, San Francisco runs 55% above the national median — so the detached 2-bedroom band comes in 40% above the mid-range, then scales 55% above the national median on top of that. Permit timelines for residential work in San Francisco typically run 10-26 weeks, which is the window you plan your design and decision sequence against. This page gives you the actual 2026 San Francisco bands for this exact combination, plus the three cost drivers Baily asks about first when scoping the project live.

What drives cost for a detached 2-bedroom scope

• ·Second bedroom adds framing, insulation, windows, door, closet
• ·Second bath adds full rough-in and ventilation
• ·Second HVAC zone or a dedicated system
• ·Larger foundation footprint

What makes San Francisco different

• Labor — Bay Area CSLB-licensed contractor scarcity keeps labor rates the highest in California.
• Labor — Union framing and electrical rates carry a 30-35% premium over national median.
• Labor — Tech-sector remodel demand (Noe Valley, Pacific Heights, Sea Cliff) competes for premium-finish crews.
• Material — Victorian + Edwardian heritage restoration uses specialty millwork and painters — significant premium.
• Material — Title 24 energy code same as rest of CA — envelope + glazing premium.

San Francisco rules that affect this scope

• SF DBI permit process is notably long (10-26 weeks typical; discretionary review on most kitchen/bath >$25K).
• Section 317 (Residential Demolition) controls ADU and addition work — lot merger and demolition ratio tracked.
• Historic Preservation Commission review for Articles 10 + 11 properties adds 8-16 weeks.
• Soft-story retrofit ordinance (SF Ordinance 66-13) affects multi-family properties with tuck-under parking.

Scope your adu with Baily.

Baily asks the eight questions that determine where your project lands inside the $391K-$825K band for San Francisco and hands the scoped brief to one licensed builder.

Related pages

Questions LA homeowners actually ask

• What is the 2026 cost range for a detached 2-bedroom scope adu in San Francisco?

  $390,600-$824,600, with the median landing near $607,600. The range reflects finish tier and layout complexity within the detached 2-bedroom scope; the San Francisco labor multiplier of 1.55× vs national median is baked in.

• How long does a detached 2-bedroom scope adu take in San Francisco?

  32-46 weeks of on-site construction for the detached 2-bedroom scope, plus 10-26 weeks of permit review in San Francisco 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?

  Lot-coverage or FAR limits — if the ADU pushes the site over local coverage max, a variance application adds 3-6 months and $5-9K in engineering + application fees.