Guides
LA ADU permits, plain English.
How LADBS actually works, what the rules mean for your specific lot, where the gotchas hide. Written from real LA permit data and broker experience.
- ADU sizingJADU
How small can an LA ADU actually be? The real floor most homeowners miss
California law lets ADUs go as small as 150 sqft, but real-world LADBS minimums and the practical floor are different numbers. Here's what actually permits in LA.
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- RoofingVHFHSZ
Roofing permits in LA: when you need one, fire-zone rules, and the solar timing question
Roofing in LA is permitted differently for like-for-like replacement vs. material changes. VHFHSZ areas have stricter rules. Solar timing matters more than most homeowners realize. Plain-language guide.
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- RemodelAddition
LA remodel and addition permits: when you need one, what triggers a full plan check, and the structural gotcha
Cosmetic remodels vs. structural additions are different worlds in LA. Bathroom remodels, kitchen remodels, second-story additions, garage conversions, each has its own permit path. Plain-language guide.
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- HVACTitle 24
HVAC permits in LA: AC replacement, heat pumps, and what duct upgrades actually trigger
LA's HVAC permit process is straightforward for like-for-like replacements but gets complex fast with heat-pump conversions and ductwork. Title 24 energy compliance is the gotcha. Plain-language guide.
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- PlumbingCSLB C-36
Plumbing permits in LA: when you need one, what triggers a sewer connection, and the gas-line gotcha
Plumbing permits in LA are simpler than people think for like-for-like work, but get tangled fast when you're moving fixtures, adding a bathroom, or upgrading gas service. Plain-language guide.
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- LADBSExpress Plan Check
LADBS Express Plan Check: when paying 50% more actually saves you money
LADBS lets you pay a 50% premium on plan check fees to jump the queue. The math, the trade-offs, and when this option pays for itself.
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- LADBSplan check
The LADBS plan check pipeline: who reviews your LA permit and what they're actually looking for
Your LA permit goes through up to 10 different LADBS departments. Each catches different issues. Knowing what each reviewer wants saves you correction cycles.
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- NavigateLAZIMAS
NavigateLA and ZIMAS: how to look up your own LA lot data for free
LA Planning publishes a public mapping tool with every zoning code, overlay, and parcel boundary in the city. Most homeowners never use it. Here's how to in five minutes.
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- jurisdictionsLADBS
LA City vs. LA County vs. independent cities: the jurisdictional gotcha that catches homeowners
Topanga is not LA City. Calabasas has its own building department. Beverly Hills has its own ADU ordinance. Here's which permit authority actually applies to your address.
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- LADBSpermit timeline
Real LA permit timelines: what LADBS actually takes vs. what they advertise
LADBS publishes 60-day plan check targets. Real-world ADU permits in LA average 4 to 7 months. Here's what slows them down, why, and how to estimate your project honestly.
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- LA zoningADU zoning
What LA zoning codes actually allow ADUs? R1, R2, R3, R4, RA, RD explained
A complete breakdown of LA City zoning categories and exactly how many ADUs each one permits. Plus what changed under SB 1211 in 2024 for multifamily lots.
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- LA ADU permitLADBS process
How to get an ADU permit in Los Angeles (the full step-by-step)
Every phase from feasibility check to certificate of occupancy. What LADBS actually wants, in what order, with realistic 2026 timelines and fees.
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- ADU eligibilityLA homeowner
Can I build an ADU at my house in Los Angeles? (Free eligibility checklist)
A 5-step checklist that answers whether your specific LA property can legally permit an ADU. Zoning, overlays, lot size, setbacks, all checked against your actual address.
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- Alquist-Priolofault zones
Alquist-Priolo Fault Zones: the one overlay that can flat-out kill your ADU
California's Alquist-Priolo Act prohibits new habitable structures within 50 ft of an active fault trace. Where these zones are in LA, what triggers them, and your real options if you're inside one.
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- Owner-builderSubcontractors
Sub coordination + draw schedule for owner-builder ADUs: a working template
How to sequence the 8-12 subs on an ADU build, where the LADBS inspection gates sit, and a milestone-based payment schedule (deposit / frame pass / rough pass / final / retainage) that keeps leverage with the owner.
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- Owner-builderMechanic's lien
Mechanic's lien releases for owner-builders: Civil Code §8132/8134 explained
Conditional vs unconditional lien releases, the 90-day filing window, the paperwork chain every sub payment needs, and how owner-builders end up with surprise liens at refinance or sale. Plain-language California guide.
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- Mulholland Scenicdesign review
Mulholland Scenic Parkway: the design overlay that catches ridge-lot ADUs by surprise
If your lot is visible from Mulholland Drive, Planning Department design review is required on top of LADBS. Brentwood, Bel Air, Hollywood Hills, Studio City. What gets approved and what doesn't.
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- Coastal ZoneVenice
The Coastal Zone changes everything: ADU permits in Venice, Palisades, and Malibu
If your lot is west of Lincoln Blvd in Venice, anywhere in Pacific Palisades, or in Malibu, you need a Coastal Development Permit on top of the building permit. Timelines, fees, and how to plan.
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- Owner-builderWorkers comp
Workers comp for owner-builders in California: what Labor Code §3700 actually requires
When you legally need workers comp coverage as an owner-builder, the narrow exemptions, what a policy costs from State Fund vs a broker, and the friends-and-family carve-out that gets misused. Plain-language guide.
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- HPOZHighland Park
HPOZ: what the historic overlay actually means for your LA ADU
Highland Park, Whitley Heights, Carthay, Hancock Park. If you're in an HPOZ, your ADU needs Office of Historic Resources approval on top of LADBS plan check. Here's what that looks like in practice.
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- Owner-builderCSLB §7044
Owner-builder declaration in LA: what CSLB §7044 actually requires
Line-by-line walk-through of the LADBS Owner-Builder Verification form, the §7044 exemption rules, primary-residence and 3-year traps, and what LADBS will reject. Plain-language guide for homeowners pulling their own permit.
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- permit expediterDIY
LA permit expediter cost vs. DIY: when each one actually makes sense
What permit expediters charge in LA, what they actually do for the money, and the specific scenarios where DIY beats hiring one. Honest comparison for ADU and remodel homeowners.
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- ADU vs JADUtiny home LA
ADU vs JADU vs movable tiny home vs accessory structure: the LA homeowner's comparison
Side-by-side comparison of every legal small-dwelling-unit category in LA. What each one is, what each one isn't, and which one fits which homeowner goal.
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- glossaryLADBS
LA ADU and permit terminology glossary: 50+ terms LADBS, Title 24, and California state law actually mean
Every LA permitting acronym defined, with citations to LAMC, LADBS Information Bulletins, California Government Code, and Cal HCD. The canonical reference for what Los Angeles permit terminology actually means.
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- LA ADU feesLADBS fee schedule 2026
LA ADU permit fees 2026: every fee, who charges it, and what it actually costs
The full LA ADU fee schedule for 2026. Plan check, building permit, sub-permits, state and city surcharges, LAUSD school fee, sewer cap, grading, with honest ranges and the fee triggers.
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- LA ADU FAQLA ADU questions
The 20 most-Googled questions about LA ADUs, answered (2026 edition)
Real answers to the most common questions LA homeowners ask about ADU permits, costs, timelines, rules, and rental income. Each answer links to a deeper guide.
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- LA ADU trendsADU permits LA history
LA ADU permit trends 2020-2026: what the numbers actually show about LA's ADU boom
Permit volume, timeline, and cost trends for LA ADUs from 2020 through early 2026. Sourced from Cal HCD APR data and LADBS reporting. What drove growth, where it's slowing, and what to expect next.
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- LADBS correctionsplan check
LADBS plan check corrections decoded: what each correction actually means and how to address it
The 30+ most common LADBS plan check corrections in plain language. What each reviewer is asking for, why they're asking, and the cleanest fix. Saves you 1-2 correction rounds.
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- ADU costsLA permit fees
The 750 sqft ADU sweet spot: how one design decision saves LA homeowners $5K–$15K
California waives LAUSD school impact fees + LA's residential development fee for ADUs 750 sqft and under. The math, the rule's history, and when going bigger is worth it anyway.
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- Hillside AreaSFV
South of the Boulevard: why your Sherman Oaks or Encino ADU costs 20% more
LA's Hillside Area designation crosses Ventura Blvd and reshapes every south-side ADU permit. The real cost premium, geotech requirements, and which lots can avoid it.
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Coming next
On the schedule
New guides drop Mondays at 9am PT. Here's what's queued.
Design tricks that make a 500 sqft LA ADU feel like 800
The architectural moves LA designers use to make small ADUs feel double their footprint. Clerestory windows, bi-fold walls, integrated storage, and the trash-can trick.
Where to splurge and where to save on your LA ADU build
The bathroom is the splurge. The kitchen for a rental unit isn't. Here's what LA ADU builders consistently recommend, with specific dollar amounts attached.
What people actually use their LA ADUs for (and the rental income each path generates)
Multi-generational living, midterm rentals on Airbnb, long-term tenants, work-from-home offices, and aging-in-place. Real LA monthly rates and ROI math for each.
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