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◍ Bay Area · San Francisco

ADU permits in San Francisco

Permit timelines, zoning quirks and design-build field notes for San Francisco.

Photo: Wikimedia Commons

Typical timeline

SF Department of Building Inspection (DBI) + Planning: 14–22 weeks for a typical ADU; longer with neighbor notification.

What changes about the permit here

San Francisco permits are the slowest in our Bay Area service area, but they're predictable once you pick the right track. State ADU Law gives ministerial approval at 60 days from a complete submittal. The SF Local Program is more flexible (allows unlimited ADUs in some multifamily buildings) but adds Section 311 neighborhood notification and Planning review on top of DBI. The schedule variables are which track you choose, whether exterior changes trigger 311, and the DBI queue.

  • State ADU Law track: ministerial 60-day review, one detached + one JADU per single-family lot.
  • SF Local Program: allows unlimited ADUs in some buildings but triggers Section 311 neighborhood notification (30 days).
  • DBI plan check queue: typically 8–14 weeks; pre-application meetings shorten the round-trip.
  • Rent Ordinance: pre-1979 multifamily units cannot be demolished without invoking the Ellis Act or Costa-Hawkins — we map existing units before drawing.
  • Mandatory Soft-Story Retrofit Program (MSSRP) on pre-1978 wood-frame buildings of 3+ stories and 5+ units.

On-the-ground notes

  • SF runs two ADU tracks — State ADU Law (faster) and SF Local Program (slower, but allows more units in some buildings).
  • Neighborhood Notification (Section 311) adds 30 days to most projects with exterior changes.
  • Rent control applies to most pre-1979 multifamily — adding ADUs is allowed but demolition is not.
  • DBI plan check queue is the most common delay; pre-app meetings shorten the round-trip.

Cost ranges (2026)

Detached new-build
$240–$310/sqft
Garage conversion
$190–$250/sqft
  • Highest Bay Area construction cost — small lots, narrow streets, parking impossible.
  • Hillside / downslope lots (Diamond Heights, Twin Peaks, Bernal Heights east) add $40–150k in retaining and access.
  • SFPUC water + sewer connection fees are the highest in the region.
  • Soft-story retrofit pairing on a multifamily building can add $80–200k tied to the ADU permit.

Zoning highlights

  • RH-1, RH-2, RH-3, RM zones — state ADU law applies across all residential zones.
  • RC, NCT, Mission Dolores SUD — neighborhood commercial / mixed-use overlays add design standards.
  • Coastal Zone applies to the Ocean Beach / Sunset / Richmond strip.
  • Rent Ordinance (Chapter 37) caps demolition of pre-1979 units.

Stage-by-stage timeline

  1. Survey + design + pre-app · 4–8 weeks

    DBI pre-app shortens later round-trips.

  2. Section 311 notification (if triggered) · 4–5 weeks

    Skip on State ADU Law track with no exterior change.

  3. DBI + Planning plan check · 8–14 weeks

    Queue is the single biggest variable.

  4. Construction · 20–30 weeks

    Small lots, narrow access, weather sensitivity.

San Francisco, in short

How much does an ADU cost in San Francisco?
Most detached SF ADUs land between $375K and $550K all-in. Garage conversions typically run $200K–$310K. SFPUC connection fees and tight site access push costs above other Bay cities.
State ADU Law or SF Local Program — which track?
State ADU Law is faster (ministerial, no 311 notification) but caps the unit count. SF Local allows more units in qualifying multifamily but adds Section 311 + Planning review. We pick the track during feasibility based on building type and unit goal.
Will my ADU trigger Section 311 neighborhood notification?
On the SF Local Program track, almost always. On State ADU Law track, only if the project includes exterior changes visible from a public right-of-way. We design to stay inside the state track when timeline matters.
Can I build an ADU in a rent-controlled building?
Yes, adding ADUs is allowed and often encouraged. What's not allowed is demolishing or substantially altering an existing rent-controlled unit. We map all existing units before any design work begins.
How long does DBI plan check actually take?
8–14 weeks is typical. Pre-application meetings cut down on round-trip corrections. Complete, well-documented packages move faster than the average.
Does the soft-story retrofit ordinance affect my building?
If your building is on the MSSRP list (pre-1978, wood-frame, 3+ stories, 5+ units), yes — the retrofit is typically permitted alongside the ADU on a coordinated inspection schedule.
How long does a San Francisco ADU permit really take in 2026?
14–22 weeks for a clean ministerial submittal. San Francisco permits are the slowest in our Bay Area service area, but they're predictable once you pick the right track. State ADU Law gives ministerial approval at 60 days from a complete submittal. The SF Local Program is more flexible (allows unlimited ADUs in some multifamily buildings) but adds Section 311 neighborhood notification and Planning review on top of DBI. The schedule variables are which track you choose, whether exterior changes trigger 311, and the DBI queue. Compare against other Bay cities in the California permit directory.
What does a San Francisco detached ADU cost in 2026?
$240–$310/sqft installed for a detached ADU, $190–$250/sqft for a garage conversion. Plug your lot into the ADU cost calculator for a tighter band, and cross-check the 2026 cost report.
Which services do you offer in San Francisco?
ADUs, whole-home remodels, kitchens, bathrooms, additions, and roofing — all under the Bay Area studio. Browse the city-level service pages from the San Francisco hub.
Where's the deeper San Francisco permit, zoning, and timeline detail?
Each topic gets its own dedicated page; the umbrella is the San Francisco city hub. Reach out from the contact page when you're ready to walk a lot.
Which San Francisco neighborhoods do you build in most often?
Active across the entire city — slope, hillside, and historic overlays we handle weekly. The San Francisco city hub lists the typical neighborhoods we visit; full studio coverage is on the Bay Area studio page.
Are there San Francisco-specific code quirks I should know about?
Yes — every California city diverges from the state baseline on at least one of: setbacks, fire-zone egress, energy ( Title 24), stormwater, or historic preservation. The permit directory tracks San Francisco's deltas; the San Francisco city hub surfaces what trips up local owners.
How does San Francisco stack up against other Bay Area cities on permit speed?
Speed depends on plan-check load and electronic submittal maturity. Side-by-side ranges live in the California permit directory; the field journal tracks shifts in real time.
Can I phase a San Francisco project to spread cost across years?
Sometimes — kitchens, baths, and ADUs can stand alone; structural and envelope work usually can't be split safely. We map phasing options during the schematic design phase.
What's the typical San Francisco client profile?
Long-tenure homeowners adding an ADU for family or rental, mid-career families remodeling for space, and small commercial owners doing tenant improvements. See real $San Francisco-adjacent work on the projects index.
How do I check San Francisco zoning for my lot before I call you?
The San Francisco city hub links the San Francisco planning portal. The glossary defines FAR, setback, and height-limit terms in plain English so the portal makes sense.
Does San Francisco allow short-term rental of an ADU?
Most California cities prohibit STR of a new ADU for the first owner-occupancy period; San Francisco's exact rule is in the permit directory. We never advise on rental strategy without confirming current local ordinance.
What insurance and bond coverage do you carry on San Francisco jobs?
General liability, workers' comp, and an active CSLB surety bond on every San Francisco project. Certificates land in your inbox before the proposal, not after. Request them here.
Which San Francisco resource is best for a first-time ADU owner?
Start with the San Francisco city hub, then read the 2026 California cost report and one or two posts from the field journal. The glossary handles every term you'll hit along the way.
What's the most efficient next step for a San Francisco project?
Run the ADU cost calculator for a number, then request a discovery call. We'll pull the San Francisco parcel before we get on the phone.

Deep dives — San Francisco

Services in San Francisco

Other Bay Area cities

Book a San Francisco site walkBack to the Bay studio

Foreman's notebook · San Francisco

What we know walking onto a San Francisco lot

Field map · San Francisco, CA
Checking conditions…
From Oakland yard
22 min
Jobs finished here
3
Build window
May–October. Fog + wind slow exterior finishes year-round.

Today's daylight window

Sunrise

5:59 AM

Golden hour

7:55 PM

Sunset

8:33 PM

Day length

14h 34m

Permit counter

SF DBI Permit Center

49 South Van Ness Ave, San Francisco, CA 94103

Phone
(628) 652-3200

Hours
Mon–Fri 8am–4pm

Our typical wait: 14–20 weeks (longer for over-the-counter exceptions)

Site
Mixed everything. Hills bedrock, flats fill, SoMa liquefiable.

Crane / staging
Special Traffic Permit + neighbor sign-off. Mini-crane on most narrow lots.

Crew spot
Sightglass Coffee — SoMa

City dossier · the 20 things we track

Locals call it
The City
Architectural DNA
Victorian · Edwardian · stucco marina
Our signature spec
Painted Hardie shingle · steel moment frame retrofit
Fire hazard zone
Non-VHFHSZ (hills exception)
Nearest fault
San Andreas Fault · 8 mi
Title 24 climate zone
Title 24 Zone 3
Median lot
2,800 sf
Typical setbacks
0ft side (lot line) · 25% rear yard
New 1BR ADU rents
$3,200–$3,800 /mo
Resale lift w/ ADU
+7–10%
Iconic landmark
Golden Gate Bridge · 4.5 mi
Street sweeping
Twice weekly per block
Trash / dumpster day
Tuesday (Recology)
Solar yield
1,480 kWh / kW · yr
Avg summer high
67°F
Avg winter low
47°F
Lots inside an HOA
3%
Nearest ER
UCSF Parnassus / SF General
Jobsite radio
KPOO 89.5 + KQED 88.5
Protected trees
All trees on city sidewalks (DPW permit to remove)
Crew lunch spot
El Farolito — 24th St Mission

10 things we already know about this area

  • DBI plan check is the slowest in the Bay — budget time and pre-app meetings.
  • Soft-story retrofit list — many multifamily ADU conversions trigger combined permits.
  • ADU State Density Bonus stacks with HCD — apply for both.
  • Liquefaction zones in SoMa, Mission Bay, Marina — pile foundations.
  • Pre-1906 wood-frame Victorians — full-dimension lumber + historic preservation reviews.
  • Western Addition + Mission have rent-controlled units — strict eviction protections.
  • Parking is brutal — staging requires a Special Traffic Permit from SFMTA.
  • SFPUC water + SF DPW + SFMTA = three agencies on a typical curb cut.
  • Crane swings over neighbors need formal sign-off, not just notice.
  • Hetch Hetchy water pressure varies block by block — survey early.

Material yards we call here

  • Center Hardware — Mission · lumber
  • Discount Builders Supply — Mission · lumber
  • Cemex SF · concrete

Recent jobs

  • Cabrillo St · Garage ADU in Richmond District
    520sf · 24 weeks · 14 mo ago
"SF is the longest permit in our service area. We sit through the pre-app meeting and never argue with the plan checker."
— Field journal, San Francisco
Local intelligence

28 things we track for every San Francisco job

What changes when the lot is in San Francisco

Same plans drawn three miles apart can cost $80k different. These are the local conditions, ordinances, soils, utilities, and crew realities that decide the number. We update this from our own jobs and the city counter.

Reg

Regulation & permits

Noise / construction hours
Mon–Sat 7a–8p · no Sun · 311 complaint = same-day inspector visit
Historic overlay
Article 10/11 (130+ landmarks) · Telegraph Hill, Russian Hill, Alamo Sq · Mills Act offered
Parking / dumpster permit
SFMTA: $328/wk + meter bag $75/day · steep cost stack vs rest of Bay
Demo diversion mandate
75% mandate (highest tier) · Recology only hauler · C&D cert required
School impact fees
SFUSD: $4.79/sf · charter areas variable · most ADU < threshold = waived
Prop 13 reassessment
Major addition >50% sf = full reassessment · keep one wall (any wall) rule strict
Zoning trajectory
SB9 splits highly contested · ADU mandate · Prop K limits height · density bonus active
ADU pre-approved plans
SF ADU pre-screen program (no full catalog) · permit timeline 18–28 wk regardless
Site

Site & geology

Soil type
Sand dunes (Sunset/Richmond) · serpentine (Twin Peaks) · bay mud (Marina, SoMa, Mission Bay)
Water table
6–15 ft Sunset/Richmond · 4–8 ft Marina/SoMa (high) · sump + waterproofing mandatory
Foundation pier depth
20–40 ft to bedrock (Marina bay mud) · 8–12 ft Sunset sand · friction piles common
Subsurface conflicts
SF Marina = 1906 quake rubble fill · old USTs in Mission/SoMa · methane in Mission Bay
Wildlife / habitat mitigation
Mission blue butterfly (Twin Peaks) · Snowy plover (Ocean Beach) · no work in critical habitat
Seasonal risks
Rain Nov–Mar · fog summer cools cure all day · earthquake retrofit driver · no fire
Street / delivery access
Narrow 22–28 ft streets · steep grades · NO truck access on stair-streets (Filbert)
Airport / flight-path noise
SFO approach over Sunset/Richmond · 10p–7a curfew · BART rumble in Mission
Util

Utilities & energy

Utility upgrade wait
PG&E 200A: 18–28 wk (worst in Bay) · 400A: 28–40 wk · meter relocation huge headache
Seismic retrofit history
~78% soft-story retrofitted (mandatory ordinance complete) · highest in CA
NEM 3.0 / solar export
PG&E: $0.05/kWh export · fog reduces yield 12–18% · battery essential · 11–14 yr payback
Pool permit reality
Almost never (climate + lot size + cost) · spa more common · 16 wk permit if attempted
Crew

Culture & crew

Local salvage / reclaimed
Building Resources (SF), Ohmega Salvage (Berkeley), Heritage Salvage (Petaluma)
Color / palette rules
Painted Lady palettes (Article 10) · facade alteration = HPC review · Mission murals respected
Theft risk on jobsite
EXTREME: tools, copper, lumber, even subs' truck parts · jobsite trailer + 24/7 cam mandatory
Sub-contractor ecosystem
Strong: Victorian restoration, soft-story retrofit, infill specialists · weak: large equipment
Tree protection fines
SF Public Works tree: $5k–25k + 3:1 · landmark tree: full appraised + $35k base
Jobsite language
Spanish + English · Cantonese (Sunset/Richmond/Chinatown jobs) · Tagalog (Daly City crews)
$

Money & momentum

Top cost surprises
Conditional Use Authorization ($14–35k + 6 mo) · neighborhood notification ($3k) · 311 noise complaints
Permit boom indicator
ADU permits steady (slow permit office) · whole-house +12% · DCR (Demolish + Rebuild) flat

Sources: city counter notes, our own permit logs, CalRecycle, CA Title 24, DOGGR, CAL FIRE FHSZ, USGS Q-Fault, PG&E / SCE / LADWP rate sheets, school district fee schedules. Last reviewed by our PMs this quarter.

Authority sources

San Francisco & Bay Area permit resources.

Primary sources we cross-reference on every project — agencies, utilities, and code bodies whose decisions actually move your permit and budget.

Ready to start a Bay Area project?

Send us the address. We’ll pull zoning, setbacks, and feasibility before you spend money on drawings — and the inquiry routes straight to the Bay Area desk.

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