Los Angeles permit
Garage conversion to ADU in Los Angeles
Convert your garage into an ADU in its current footprint. No replacement parking required. Often the cheapest LA ADU path.
Permit speed
60-90 day plan check
ADU plan check target. YOU-ADU pre-approved plans don't apply (those are detached). Conversions need custom drawings.
Typical cost
$80K-$200K
Detached 2-car garage: $90-160K. Attached garage: $80-140K. Premium finishes / utility upgrades push higher.
License needed
B (general) typical
Licensed B contractor handles structural, electrical, plumbing, framing, finish. Verify at cslb.ca.gov.
Build time
8-16 weeks
Faster than detached ADU because the shell exists. Slower than people expect because of utility runs.
The cheapest LA ADU path (when it works)
Converting a garage skips the most expensive parts of an ADU build: no foundation excavation, no exterior walls + roof from scratch, no new utility-trench runs (if attached), no setback fight (existing footprint is grandfathered). State law protects the conversion path — local zoning can't require you to replace the lost parking spaces, can't require setback compliance for the existing footprint, and can't require demolition + rebuild.
The catch: garages weren't built to be lived in. The conversion adds insulation (Title 24), egress windows, plumbing, electrical subpanel, HVAC, finished floors + walls + ceiling, water heater, smoke + CO alarms — essentially building a small house inside the garage shell. Costs land $80-200K for a typical conversion.
5 LA garage-conversion gotchas before you sign
No replacement parking required (CA Gov Code §65852.2(d)(2))
California state law prohibits LA from requiring you to replace the parking spaces you lose by converting the garage. This used to be a major blocker — gone since 2020. The garage spots disappear, period. Some HOAs try to enforce private parking covenants — those generally don't override state ADU law.
Ceiling height: 7'-0" minimum (CRC R304)
Most LA garages have 8'-0" or higher ceilings — fine for ADU conversion. But older detached garages (1940s-50s) sometimes have 7'-6" or lower, especially after slab replacement raised the floor. If your garage ceiling is below 7'-0", you need to raise the roof (expensive) or skip the conversion. Measure BEFORE you sign with a contractor.
Egress windows in every sleeping room (CRC R310)
Bedrooms in the converted garage need an egress window: 5.7 sqft openable area, 24 in. min height, 20 in. min width, sill ≤44 in. above floor. If your garage door wall becomes a bedroom, the contractor cuts a new opening. Adds $1-3K per window. Plan placement of bedrooms accordingly.
Utility upgrades catch budgets (water, sewer, electrical)
Older detached garages often weren't built for habitation: no water line, no sewer connection, undersized electrical sub-feed. Trenching utilities from the main house to a detached garage runs $5-15K depending on distance + slope. For attached garages it's usually a few thousand. Get an estimate from a plumber + electrician BEFORE the construction contract is signed — these are routine surprise charges.
Title 24 energy compliance is real
The garage has to be insulated to current Title 24 standards (R-19 walls, R-30 ceiling typical). That means new framing inside the existing walls (loses ~6 inches of interior space per side), new windows (dual-pane low-e), new HVAC (mini-split or extended from main house), new water heater. This is where converted-garage ADU costs balloon vs. people's mental model of 'just finish the inside.' A real conversion is a small-scale new build inside an existing shell.
Free drawings from your address
Auto-generated from LA County GIS + LARIAC orthoimagery + Microsoft Building Footprints. Hand to your B-licensed contractor as a starting point.
- Site plan — parcel polygon + existing primary + existing garage outline (auto-detected from MS Footprints). Available now.
- Existing floor plan template — auto-sized from your garage footprint (typical 2-car = 20×20 = 400 sqft). Coming next.
- Proposed floor plan — interactive layout with bedroom + kitchen + bath + closet placement. Honors egress + clear-access rules. Coming with the rules engine.
- Title 24 CF1R energy report — generated from finish specs (insulation, windows, HVAC, water heater). Coming via cf1r-extract.ts integration.
Find an LA ADU contractor
Hand-curated list of LA-area ADU contractors who handle garage conversions. Most are B-licensed generals with multiple conversions in their portfolio.
See LA ADU contractors →Or start with a pre-approved plan
Standard plans (YOU-ADU, ADU1-96) are designed for new detached construction — they don't fit a garage shell. But browsing helps benchmark cost + finish levels for your conversion.
Browse 88 LADBS-approved plans →Check your address first
Get the verdict + zoning + overlays + LADBS forms specific to your lot. Free, no signup.
Run feasibility check →Drawings we generate for you
Auto-drawn from your address using LARIAC orthoimagery, parcel polygons, and Microsoft Building Footprints.
- Site plan
- Existing floor plan
- Proposed floor plan
- Elevations
The permit pathway
Phase 01
Confirm feasibility
Verify your lot can take a detached ADU
California state law (Gov Code §65852.2) lets virtually every single-family lot in LA add at least one ADU. But you need to know your zone, lot size, and any overlays (hillside, HPOZ, fault zone) before committing to a plan.
Phase 02
Confirm your plan
YOU-ADU (free) is selected by default
We've selected YOU-ADU — the City of LA's own 455 sqft / 1-bed / 1-story plan. It's the only fully-free option, comes in 3 façade styles, and skips the architect entirely. Want different? Switch to one of the 80+ designer plans (paid, $2K–$8K license).
Phase 03
Prepare submittal package
Build the plot plan + title sheet
LADBS requires the YOU-ADU drawings PLUS a property-specific title sheet and plot plan. This is the only design work you need to do. Many homeowners hire a draftsperson ($500–$2,000) instead of doing it themselves.
Phase 04
Submit for plan check
Upload to ePlanLA, pay plan check fee, address corrections
Submit electronically through ePlanLA — LADBS engineers review for code compliance. They issue a corrections list; you revise and resubmit. Usually 1–2 rounds for a clean YOU-ADU submittal.
Phase 05
Issue permits
Pay remaining fees, pull all trade permits
Once plans are approved, you pay the balance of the building permit fee plus state/green/records surcharges and pull the trade-specific permits.
Phase 06
Construction & inspections
Build it, inspect at each stage
Now that all permits (building + electrical + plumbing + mechanical + solar) are issued, construction can legally start. Your contractor builds in stages, and each stage stops for an LADBS inspection BEFORE the next can begin. Inspectors verify the work matches the approved plans — they're the verification step. Don't bury anything you haven't passed inspection on (foundation rebar, plumbing rough, electrical rough): you'll have to dig it up.
Phase 07
Certificate of Occupancy
Get the keys
Once all final inspections pass, LADBS issues the Certificate of Occupancy — the legal document that says the ADU can be lived in. Bureau of Engineering assigns the official ADU address. Utility connections (LADWP) finalized.
What the code requires
Typical baseline for an R1 lot with no overlays. The wizard adjusts these for your specific zone + overlays (Hillside, HPOZ, VHFHSZ, Coastal, etc.). Every value cites its source code section.
| Rule | Value | Source |
|---|---|---|
| Max size | 1200 sqft | CA Government Code 65852.2(c)(2)(B) |
Additional requirements
- Conversion stays in the existing garage footprint. No replacement parking required for the converted spots.CA Government Code 65852.2(d)(2)
- Existing garage must meet ADU habitability requirements after conversion: ceiling height, window egress, smoke + CO alarms, energy compliance.CA Residential Code R304-R310