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GoldenStateADU

Permitting · 11 min read · February 4, 2026 · 562 words

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.

Key takeaways

  • Rear setback: 4 ft maximum.
  • Side setbacks: 4 ft maximum.
  • Front setback: must match the underlying zone — no state preemption.

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

California ADU law is a moving target. The state framework lives in Government Code §65852.2 and is interpreted locally by LADBS for properties inside the City of LA. Between 2023 and 2025 the legislature passed AB 976, AB 1033, AB 1332, and SB 477 — each one nudging the rules toward faster, by-right approvals. This guide decodes what's actually enforceable in LA in 2025. For the project calendar that follows from these rules, see the week-by-week timeline.

By-right approval and the 60-day clock

Under state law, a complete ADU application must be approved or denied within 60 days. LADBS publishes its current intake checklist in the ADU Information Bulletin, and the clock only starts when the submittal is deemed complete. The most common reason the clock doesn't start: a missing site plan with setbacks dimensioned, or a Title 24 energy compliance form that hasn't been signed by a registered CEA — the Title 24 guide covers what that form needs to contain.

Setbacks, height, and the four-foot rule

State law caps rear and side setbacks at four feet for new detached ADUs. LA can't require more, even in single-family zones. Height limits are tiered: 16 ft baseline, 18 ft on lots within a half-mile of major transit, 25 ft for two-story attached ADUs that match the primary dwelling. The California Department of Housing and Community Development ADU Handbook is the canonical reference.

  • Rear setback: 4 ft maximum.
  • Side setbacks: 4 ft maximum.
  • Front setback: must match the underlying zone — no state preemption.
  • Lot coverage: ADU exempt from the standard cap if under 800 sq ft.

Owner-occupancy and the AB 1033 condo path

Owner-occupancy requirements are suspended statewide through January 1, 2025 and LA has not reintroduced them. AB 1033 also opens a new path: cities may opt in to allow ADUs to be sold separately as condos. LA hasn't opted in yet, but the California YIMBY tracker is the fastest place to watch for that change. If a separate sellable parcel is the actual goal, compare against the SB9 lot split guide first.

Fees, school district levies, and the 750 sq ft line

ADUs under 750 sq ft are exempt from impact fees citywide. Above 750 sq ft, fees are proportional to the primary dwelling. School district fees apply above 500 sq ft and are set by LAUSD Developer Fees.

The application packet that actually clears intake

  1. Site plan to scale, with all setbacks dimensioned and existing structures shown.
  2. Floor plan + elevations, signed by the design professional.
  3. Title 24 Part 6 energy compliance forms (CF1R), signed by a CEA.
  4. Structural calculations stamped by a CA-licensed engineer for two-story or hillside lots — see hillside soils for what's expected on slopes.
  5. Soils report on lots with a slope greater than 20%.
  6. Sewer capacity letter or septic certification — covered in the utility connection guide.

Sources

  1. California Government Code §65852.2 · California Legislature
  2. LADBS ADU Information Bulletin · LA Department of Building and Safety
  3. California ADU Handbook · California HCD
  4. LAUSD Developer Fees · LA Unified School District
  5. AB 1033 (2023) Bill Text · California Legislature

Next chapter · 01 of 03

Permitting · 7 min read

The LA ADU permit timeline, week by week

Now map those 2025 rules onto the actual 22-week calendar — and see exactly where projects stall.

From signed agreement to building permit in 14–22 weeks: what happens, who is doing it, and the three places projects stall.

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 Beverly Hills?
    City of Beverly Hills Community Development runs plan check 120–180 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 Beverly Hills?
    Plan check, building permits, and final inspections go through City of Beverly Hills Community Development. 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 Beverly Hills?
    In Beverly Hills, 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 120–180 days off the schedule.
  4. Does state ADU law override Beverly Hills rules for my ADU?
    For qualifying ADU and JADU scopes, California Government Code §65852.2 and §65852.22 preempt most local discretionary review — Beverly Hills 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 Beverly Hills for a ADU?
    Where Beverly Hills 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 Beverly Hills?
    City of Beverly Hills Community Development runs plan check 120–180 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 Beverly Hills?
    Plan check, building permits, and final inspections go through City of Beverly Hills Community Development. 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 Beverly Hills?
    In Beverly Hills, 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 120–180 days off the schedule.
  9. Does state ADU law override Beverly Hills rules for my garage conversion?
    For qualifying ADU and JADU scopes, California Government Code §65852.2 and §65852.22 preempt most local discretionary review — Beverly Hills 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 Beverly Hills for a garage conversion?
    Where Beverly Hills 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 Beverly Hills?
    City of Beverly Hills Community Development runs plan check 120–180 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 Beverly Hills?
    Plan check, building permits, and final inspections go through City of Beverly Hills Community Development. 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: aggregated from real California ADU and residential construction projects, 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 · 8 min

    ADU vs SB9 lot split: which path actually fits your lot

    Two state laws now let LA homeowners add density. SB9 splits the lot and creates a separately sellable parcel; ADU law adds a unit. The decision turns on three numbers — and one local opt-out.

    Read chapter →

  2. 03 / 03

    Process · 8 min

    How to vet any LA ADU contractor in 8 minutes

    A repeatable protocol for verifying license, bond, insurance, and complaint history before you sign anything — using only free public databases.

    Read chapter →

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