Image from the LADBS listing
Footprint, to scale
About 37 × 27 ft, from 921 sq ft
See what you can build on your property
A free report for any address in Southern California: the ADUs that fit, where they go, the fees, the plans already approved, and how ready the property is for fire season.
Free. On screen in seconds, no account needed. Full reports in Los Angeles County; Orange and San Diego counties get the state rules with the parcel, the home outline and the fire zone.
Aerial imagery © Mapbox © Maxar
Where ADUCheck works
Every report says which rules it used, so you always know what we checked.
Tell me when my city is added- Full reports
City of Los Angeles and unincorporated LA County. More cities each month.
- Coming soon
State rules now. City rules for Irvine, Anaheim, Santa Ana and Huntington Beach first.
- Coming soon
State rules now. City of San Diego first.
Three free checks
- What you can build
Detached, attached and junior ADUs, conversions, and a backyard office. Where each one fits, with its height, setbacks and fees.
Check my property - Fire check
Your fire hazard zone, the Zone 0 rules for the first 5 ft around the home, and the work that matters most.
Check fire readiness - Plans that fit
City pre-approved plans and backyard offices that fit the space behind your home, drawn to scale.
Browse plans
What the report tells you
Everything a designer would ask you on the first call, checked against your property and the rules in force today.
- Your zone and your property
Zone, size and shape of the property, the existing home and garage, and whether you are in a hillside, fire, coastal or historic area.
- Which ADUs fit, one by one
A detached ADU, a garage conversion, an attached ADU and a junior ADU inside the home, each with the size and height allowed.
- Where a detached ADU can go
A drawing of your property with the space a detached ADU can use, 4 feet from the side and back.
- Which fees you pay
Which fees apply and which do not. Since January 2026 there are no city impact fees on an ADU of 750 square feet or less.
- Pre-approved plans that fit
The LA City and LA County plans that fit your property, ready to submit, so you skip most of the design time.
Every pre-approved plan in one place
LA City and LA County have approved plans from local architects. Pick one and the city reviews only how it sits on your property.
Image from the LADBS listing
Footprint, to scale
About 29 × 21 ft, from 569 sq ft
Image from the LADBS listing
Footprint, to scale
About 25 × 19 ft, from 430 sq ft
Image from the LADBS listing
Footprint, to scale
About 32 × 23 ft, from 696 sq ft
From address to permit
- Step 1Check your property
Free report in seconds: what fits, where it goes, what fees apply.
- Step 2Choose a plan
Filter the pre-approved plans by size, bedrooms and stories. Save the ones you like.
- Step 3Get quotes
Ask our partner architects and builders for a price. You choose who to talk to.
- Step 4Submit to the city
The city has 15 business days to say if your application is complete and 60 days to decide.
What changed for ADUs in 2026
New state laws took effect this year. Every report applies them.
Read the full guide- SB 543Lower fees for smaller ADUs
No impact fees on an ADU of 750 sq ft or less, or a junior ADU of 500 sq ft or less, measured as interior living space. No school fees at 500 sq ft or less.
- SB 543A faster answer from the city
15 business days to tell you if the application is complete, with a list of what is missing. A written appeal if you disagree.
- SB 543Combine ADU types
On a single-family property you can build a converted ADU, a junior ADU and a detached ADU together.
- AB 1154Junior ADUs without the owner rule
If the junior ADU has its own bathroom, the owner no longer has to live on the property. Rentals must be longer than 30 days.
Room for more than one home?
If your property is zoned RD or R3, or large enough to split, it may fit several new homes. Vivienda builds four homes on a typical 50 by 150 foot property and buys property to do it.
Shown in your report when it applies
ZoneRD1.5-1
Property7,500 sq ft
Small lot subdivisionMay qualify
Homes that may fitUp to 5
Talk to ViviendaFree review
Architects, builders and trades: meet homeowners who are ready to build.
List your pre-approved plans for free and get requests from people who already know what fits.