A decade of state housing bills made ADUs legal almost everywhere in Los Angeles. Here's the plain-English roundup of the laws that matter in 2026 — and the parts the headlines get wrong.
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If you've looked into building an accessory dwelling unit in Los Angeles, you've probably run into a wall of bill numbers — SB 13, AB 68, AB 1033, SB 9 — with no clear picture of what each one actually changed. The short version: over the last several years, a series of California state laws stripped away the local rules that used to block ADUs, and the result is one of the most permissive ADU environments in the country. In the City of LA, roughly one in three newly permitted homes now includes an ADU (CA YIMBY, 2024).
This guide walks the key California ADU laws as they stand in 2026, bill by bill, with a summary table you can scan. Just as important, it flags the two places homeowners get burned by the new laws: the "60-day approval" promise (a statute, not reality for custom builds) and the CalHFA $40,000 grant (currently paused). We're a vetted directory of licensed LA builders, not attorneys — treat this as an orientation, and verify specifics with California HCD's ADU Handbook and your city.
California's ADU laws (SB 13, AB 68/881, AB 2221/SB 897, AB 1033, SB 9, and now SB 543) make ADUs ministerial — meaning approval is by-right, not discretionary. There's no minimum lot size, parking is waived near transit, the state guarantees up to 800 sq ft / 16 ft on any single-family lot, and as of Jan 1, 2026, cities must tell you within 15 business days whether your application is complete. The catch: the famous "60-day" approval is a deadline that only kicks in once your application is complete — real LA custom builds still run roughly 3–6 months to permit.
Here's every major California ADU bill, what year it took effect, and what it actually changed. Detailed notes on each follow below.
| Bill | Year | What it changed |
|---|---|---|
| SB 13 | 2020 | 60-day ministerial review; impact-fee waiver for ADUs under 750 sq ft |
| AB 68 / AB 881 | 2020 | Removed minimum lot size; cut or eliminated most parking rules; streamlined approvals |
| AB 2221 / SB 897 | 2023 | Raised height limits (16–18+ ft near transit); barred parking near transit; required objective review; addressed front-setback denials |
| AB 1033 | 2024 | Lets ADUs be sold separately as condos — only where a city opts in |
| SB 9 | 2022 | Urban lot splits / duplexes in single-family zones (up to ~4 units); does NOT override HOA rules |
| SB 543 | 2026 | City must determine application completeness within 15 business days |
Sources: CA HCD ADU Handbook and Holland & Knight, 2026 housing laws.
SB 13 is the foundation. It made ADU permits ministerial — meaning a city must approve a code-compliant application on a staff level without a public hearing or discretionary review — and it set a 60-day deadline for that decision once an application is complete. Critically, it also exempted ADUs under 750 sq ft from impact fees, and scaled fees for larger units to the size of the primary home (HCD ADU Handbook). On a typical LA ADU, that fee waiver alone can save thousands.
This pair gutted the local rules cities used to quietly block ADUs. They removed minimum lot size requirements (you can build an ADU on essentially any single-family or multifamily lot), cut or eliminated most parking requirements, and tightened approval timelines so cities couldn't slow-walk applications. Before these bills, a city could demand replacement parking or claim your lot was "too small" — both excuses are now off the table.
The 2023 cleanup bills closed loopholes cities were using to deny projects. They raised height limits — generally to 16 ft, and up to 18 ft or more near major transit stops or on multifamily lots — barred parking requirements within one-half mile of transit, required cities to use objective (not subjective) review standards, and addressed cities denying ADUs over front-setback technicalities. In transit-rich LA, the parking waiver is a big deal: no more carving up your yard for a mandatory stall (Holland & Knight; see also our guide to ADU vs. JADU rules).
AB 1033 is the headline-grabber: it allows homeowners to sell an ADU separately from the main house as a condominium. The catch most articles bury is that it's opt-in by city — the law only applies where the local government has adopted an ordinance to permit condo conversions. LA participation varies, and you can't assume it's available at your address. Treat AB 1033 as a "maybe, locally" item and confirm with your city before building around it.
Almost every bill above shares one goal: making ADUs ministerial / by-right. That means a compliant project can't be killed by a neighbor's objection or a planning commission's mood — it's approved on objective standards. It's the legal reason LA went from 80 ADU permits in 2016 to roughly 7,160 in 2022 (CA YIMBY).
SB 9 is often grouped with ADU law, but it's a different tool. It lets owners in single-family zones do an urban lot split and/or add a duplex — potentially turning one lot into up to roughly four units. It's powerful for the right property, but it comes with conditions (owner-occupancy, lot-size minimums for splits) that ADUs don't have.
This trips people up. SB 9 strips away city zoning barriers — it does not override a homeowners association's CC&Rs. If you're in an HOA, its recorded restrictions can still legally block or limit a lot split or duplex. Read your CC&Rs before counting on SB 9. (State ADU law generally limits how much HOAs can restrict ADUs, but SB 9 is a separate statute — don't assume they work the same way.)
The newest piece, effective January 1, 2026, attacks a common stalling tactic: cities sitting on applications without saying whether they're even complete. SB 543 requires a city to make a completeness determination within 15 business days — it must tell you whether your application is complete (and if not, exactly what's missing) within that window (Holland & Knight, 2026 housing laws). That matters because the 60-day approval clock only starts once your application is deemed complete — so a faster completeness check tightens the whole timeline.
You'll see "ADUs approved in 60 days!" everywhere. Here's what's actually true. The 60 days is a statutory deadline from SB 13 — the legal maximum a city has to issue a ministerial decision after your application is deemed complete. It is not the start-to-finish timeline for a custom build, and treating it as one sets you up for disappointment.
In the real world, custom LA ADU permitting runs roughly 3–6 months, and end-to-end (design through permit through construction) is more like 8–14 months. The Terner Center measured LA County at about 147 days from application to permit outside the coastal zone, and 260 days inside it. Where the fast number is real is pre-approved standard plans: those can hit roughly 21–30 days, and AB 1332 requires cities to approve pre-approved plans within 30 days.
If a builder or salesperson promises your custom ADU will be permitted in 60 days, treat it as a red flag — it confuses a legal deadline with reality. A vetted, honest builder will quote you a realistic 3–6 month permit window (faster on a standard plan) and walk you through the gating items. For the full breakdown, see how long it really takes to build an ADU in LA and our LA ADU permit guide.
Send us your address and we'll run a free desk check — zoning, lot size, setbacks, transit-parking waivers, overlays — and tell you straight whether an ADU is viable, before you spend a dollar on plans.
Request an intro to a verified builderBecause it comes up constantly: the CalHFA ADU Grant Program — the well-known program that offered up to $40,000 toward predevelopment and closing costs — is currently paused / out of funds. The last round of funding was fully allocated back in December 2023, and there is no confirmed relaunch as of 2026. It may reopen if the state appropriates new money, but you should not build your financing plan around it today.
Do not assume the CalHFA grant is available. Check the program's current status directly at calhfa.ca.gov/adu (background and context: RenoFi's CalHFA grant overview). For ways to fund an ADU that don't depend on a paused grant, see our ADU financing guide for LA.
Strip away the bill numbers and here's the practical takeaway for your property:
The laws cleared the path; the work now is doing the project right — confirming your specific zoning, sizing the unit to your goals, and hiring a licensed builder who knows LADBS. That's where most homeowners want a second set of eyes. If you're still at the "could I even build one?" stage, start with can I build an ADU in Los Angeles, then read up on the different types of ADUs in California and, if the term is new to you, what an ADU actually is.
California passes new housing bills almost every legislative session, and cities adopt local ordinances on top of the state floor. The roundup above is accurate for 2026, but always confirm current rules, fees, and program status with LADBS, CSLB, and CalHFA — or let us run your address through a free check so you're working from your property's actual numbers, not a generic article.
Before you spend a dollar on permits, let us check your address — zoning, lot size, setbacks, overlays — and tell you straight whether an ADU is viable. If it looks good, we connect you with a vetted, California-licensed LA builder for a free on-site feasibility assessment. No cost, no commitment.
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