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GoldenStateADU

Permitting · 9 min read · May 24, 2026 · 288 words

San Francisco ADU permitting: the 2026 rulebook

SF runs the most distinctive ADU process in California — Pre-App meetings, mandatory neighbor notification, and the HCD-compliant pathway. A working playbook.

Key takeaways

  • Pre-App meeting scheduling + prep: 6–10 weeks.
  • Plan submittal to first comments: 8–14 weeks.
  • Section 311 notification (if local pathway): 30 days, parallel.

Answered in this guide

Jump straight to the question you came in with — every answer is on this page, with links onward to the deeper guide.

  1. What is SB-9 and does it apply to me?
  2. What about hillside or coastal lots?
  3. I'm in an HPOZ — can I still build?
  4. Do you handle the permitting?
  5. What setbacks and height limits apply?
  6. How long does an ADU project take in Los Angeles?

More across the studio · the full FAQ map · the reference desk

San Francisco has its own ADU program that runs in parallel with the state HCD-compliant pathway. Knowing which lane to file in is the single biggest determinant of your timeline. The local program allows more units but requires neighbor notification under Section 311; the state pathway is faster but caps you at one ADU and one JADU.

Pathway A: HCD-compliant (fast)

Ministerial approval, 60-day statutory clock, no neighbor notification, no discretionary review. Capped at one ADU + one JADU. Best for: single ADU additions on standard SF lots.

Pathway B: Local SF program (more units, slower)

Allows multiple ADUs in existing multi-family buildings, conversions of storage and parking, and waivers from setback and FAR limits. Requires Section 311 neighbor notification (30-day window) and Pre-Application Meeting.

The Pre-Application Meeting

SF Planning requires a Pre-App meeting for most projects above a basic size threshold. Cost: $1,800–$3,200. Lead time to schedule: 4–8 weeks. Output: a written summary of issues to address before formal submittal — invaluable for avoiding RFI cycles.

Section 311 notification

Adjacent property owners get a 30-day window to file a Discretionary Review request. Most ADU projects in established neighborhoods do not draw a DR; controversial projects can add 4–9 months to the timeline.

Realistic timeline

  1. Pre-App meeting scheduling + prep: 6–10 weeks.
  2. Plan submittal to first comments: 8–14 weeks.
  3. Section 311 notification (if local pathway): 30 days, parallel.
  4. Plan check round 2: 6–10 weeks.
  5. Permit issuance: cumulative 5–9 months from Pre-App.

Sources

  1. SF Planning — ADU Program · San Francisco Planning Department
  2. California HCD — ADU Handbook · California HCD

Next chapter · 01 of 03

Cost · 9 min read

The anatomy of a Bay Area ADU build, line by line

How Oakland's process compares — different pathways, different timelines.

Where every dollar of a $360,000 detached 800 sq ft Bay Area ADU goes — and why the same unit costs $35K–$60K more than its LA counterpart.

FAQ · Permitting

Common questions on permitting

The questions readers send us most after this guide.

  1. What is SB-9 and does it apply to me?
    SB-9 (the California HOME Act) lets eligible single-family lots split into two parcels and/or add a duplex. We assess eligibility during the feasibility call — roughly 60% of LA single-family lots qualify on paper, fewer in practice once HPOZ, hillside, and coastal overlays are applied. SB-9 projects can stack with an ADU for up to four units on what was a single-family lot.
  2. What about hillside or coastal lots?
    Hillside requires a Methane District review (where applicable) plus a haul route plan if grading exceeds 1,000 cubic yards. Coastal Zone projects (anything west of Lincoln Blvd in Venice, for example) need a Coastal Development Permit on top of standard LADBS approval. Both are workable; both add 60–90 days.
  3. I'm in an HPOZ — can I still build?
    Yes, but with design review. Historic Preservation Overlay Zones require Certificate of Appropriateness from the cultural heritage commission before permits issue. We've shepherded projects through Miracle Mile, West Adams, Whitley Heights, and Spaulding Square HPOZs. Add 8–12 weeks for the COA process.
  4. Do you handle the permitting?
    Yes. We file with LADBS or your local building department, manage plan check, coordinate utility upgrades, schedule inspections, and deliver final sign-off. You don't visit the counter, we do.
  5. What setbacks and height limits apply?
    Statewide ADU law (AB 68/881) overrides most local restrictions: 4-foot side and rear setbacks, 16-foot height for detached one-story, 18-foot for two-story within ½ mile of transit. Front setbacks follow the underlying zone. We model your envelope at the schematic stage.
  6. How long does an ADU project take in Los Angeles?
    Most detached ADUs run 9–13 months from contract to certificate of occupancy. Garage conversions are typically 4–6 months. Permitting alone is usually 60–120 days at LADBS depending on whether we use a pre-approved standard plan or a custom design that needs full plan check.

Reference desk · Permitting

More answers from the California reference desk

City-specific questions pulled from our 5,000-answer FAQ corpus — every link opens a deeper desk page.

Browse the full reference desk →

  1. How long does a ADU permit take in San Francisco?
    City of San Francisco Planning & Building runs plan check 150–240 days on a complete, code-conformant submittal for a ADU. First-cycle approvals depend on three things: a stamped structural set, a Title 24 energy report bound into the package, and a site plan with verified setbacks. Most slippage comes from missing one of those three on first submittal.
  2. Who is the permitting authority for a ADU in San Francisco?
    Plan check, building permits, and final inspections go through City of San Francisco Planning & Building. For state-law ADU scopes there is no discretionary design review — submit to the building counter and timelines are governed by California Government Code §65852.2 ministerial requirements. Outside of pure state ADU law (additions, full remodels, hillside scopes), expect at least one planning-zoning touch.
  3. Why do ADU permits get rejected in San Francisco?
    In San Francisco, the five most common first-cycle corrections are: (1) Title 24 energy compliance not bound to the submittal, (2) site plan setback math off by inches, (3) structural calcs not stamped by a CA-licensed engineer, (4) utility load calculations missing for the panel upgrade, and (5) drainage/grading not addressed for impervious-surface adds. Fixing all five before submittal cuts 150–240 days off the schedule.
  4. Does state ADU law override San Francisco rules for my ADU?
    For qualifying ADU and JADU scopes, California Government Code §65852.2 and §65852.22 preempt most local discretionary review — San Francisco cannot impose owner-occupancy requirements (banned by AB 976), most parking minimums near transit, or stylistic design review. Local jurisdictions still control building-code application, Title 24, utility connection, and impact fee schedules. Non-ADU scopes (full additions, remodels, hillside builds) remain fully under local control.
  5. Are pre-approved standard plans available in San Francisco for a ADU?
    Where San Francisco has adopted a pre-approved standard ADU plan program, using one cuts plan check by 30–60 days and removes the structural review fee. For programs that exist (LADBS, San Jose, San Diego), the trade-off is that floor-plan changes void the pre-approval. Most owners are better off using a standard plan as a starting point and accepting the layout it ships with.
  6. How long does a garage conversion permit take in San Francisco?
    City of San Francisco Planning & Building runs plan check 150–240 days on a complete, code-conformant submittal for a garage conversion. First-cycle approvals depend on three things: a stamped structural set, a Title 24 energy report bound into the package, and a site plan with verified setbacks. Most slippage comes from missing one of those three on first submittal.
  7. Who is the permitting authority for a garage conversion in San Francisco?
    Plan check, building permits, and final inspections go through City of San Francisco Planning & Building. For state-law ADU scopes there is no discretionary design review — submit to the building counter and timelines are governed by California Government Code §65852.2 ministerial requirements. Outside of pure state ADU law (additions, full remodels, hillside scopes), expect at least one planning-zoning touch.
  8. Why do garage conversion permits get rejected in San Francisco?
    In San Francisco, the five most common first-cycle corrections are: (1) Title 24 energy compliance not bound to the submittal, (2) site plan setback math off by inches, (3) structural calcs not stamped by a CA-licensed engineer, (4) utility load calculations missing for the panel upgrade, and (5) drainage/grading not addressed for impervious-surface adds. Fixing all five before submittal cuts 150–240 days off the schedule.
  9. Does state ADU law override San Francisco rules for my garage conversion?
    For qualifying ADU and JADU scopes, California Government Code §65852.2 and §65852.22 preempt most local discretionary review — San Francisco cannot impose owner-occupancy requirements (banned by AB 976), most parking minimums near transit, or stylistic design review. Local jurisdictions still control building-code application, Title 24, utility connection, and impact fee schedules. Non-ADU scopes (full additions, remodels, hillside builds) remain fully under local control.
  10. Are pre-approved standard plans available in San Francisco for a garage conversion?
    Where San Francisco has adopted a pre-approved standard ADU plan program, using one cuts plan check by 30–60 days and removes the structural review fee. For programs that exist (LADBS, San Jose, San Diego), the trade-off is that floor-plan changes void the pre-approval. Most owners are better off using a standard plan as a starting point and accepting the layout it ships with.
  11. How long does a JADU permit take in San Francisco?
    City of San Francisco Planning & Building runs plan check 150–240 days on a complete, code-conformant submittal for a JADU. First-cycle approvals depend on three things: a stamped structural set, a Title 24 energy report bound into the package, and a site plan with verified setbacks. Most slippage comes from missing one of those three on first submittal.
  12. Who is the permitting authority for a JADU in San Francisco?
    Plan check, building permits, and final inspections go through City of San Francisco Planning & Building. For state-law ADU scopes there is no discretionary design review — submit to the building counter and timelines are governed by California Government Code §65852.2 ministerial requirements. Outside of pure state ADU law (additions, full remodels, hillside scopes), expect at least one planning-zoning touch.

Sources & further reading

  • California Government Code §65852.2 — statewide ADU framework (ministerial review, 60-day clock).
  • LADBS — Accessory Dwelling Unit information bulletins and current permit fee schedule.
  • HCD — California Department of Housing & Community Development, ADU handbook (2024 update).
  • Internal data: 120++ ADU projects delivered across Los Angeles County, 2018–2025.

Continue your read · the editorial path

We chained these chapters in the order LA homeowners actually need them. Each one picks up where the last one left a question open.

  1. 02 / 03

    Permitting · 7 min

    Oakland ADU permitting: rules, fees, and timeline

    Oakland runs one of the more streamlined ADU programs in the Bay Area. What to expect on plan check, impact fees, and parking.

    Read chapter →

  2. 03 / 03

    Permitting · 11 min

    The 2025 LA ADU permitting rulebook, decoded

    What [LADBS](https://www.ladbs.org/) and California's HCD actually require in 2025 — by-right approvals, setbacks, owner-occupancy, and the rules that quietly changed this year.

    Read chapter →

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