1 bedroom
One-bedroom with kitchen island
1 bed1 bath
Home · Service areas · Fullerton
ADU design-build · FullertonADUs in Fullerton
Historic neighborhoods, a university town and deep lots near downtown: Fullerton suits family ADUs as much as rentals for students and staff.
What applies to your lot
Building an ADU in Fullerton
Who approves your ADU
City of Fullerton: ADUs follow Chapter 15.17 of the Fullerton Municipal Code, reviewed by Community and Economic Development. State law applies everywhere: a decision within 60 days of a complete application, no public hearing, and at least 800 sq ft with 4 ft side and rear setbacks.
Up to 1,200 sq ft detached
A new detached ADU can reach 1,200 sq ft, with 800 sq ft guaranteed, 4 ft side and rear setbacks, and the height allowed in the zone.
Residential Preservation Zones
Several historic neighborhoods are Residential Preservation Zones. ADUs are allowed there, following the city design guidelines for these districts.
Parking relief
No extra parking within half a mile of public transit, or when parking would harm a preservation zone or a listed historic resource.
California law, everywhere
The rules every city must respect
800 sq ft
Every city must allow at least an 800 sq ft detached ADU with 4 ft setbacks.
4 ft
Maximum side and rear setback for a new detached ADU.
750 sq ft
No impact fees up to this size.
60 days
To approve or deny a complete application, without a hearing.
Ideas for your lot
Plans that suit Fullerton lots
2 bedrooms
Two-bedroom rectangle
2 beds1 bath
2 bedrooms
Two bedrooms, two baths
2 beds2 baths
FAQ
ADU questions in Fullerton
Who approves an ADU in Fullerton?
The City of Fullerton. We check zoning and whether your home sits in a Residential Preservation Zone before drawing.
Can I build in a historic neighborhood?
Yes. Preservation zones allow ADUs; the design simply follows the city guidelines for those streets.
Do you come to my property?
Yes. The visit is free: we look at the lot, the access and the utilities, then give you a realistic estimate.
Nearby areasAnaheimWhittierGarden Grove
Free feasibility call
Book a free 15-minute feasibility call
A project lead reviews your address, tells you what your lot can hold and gives you a first look at your financing eligibility.
What you get
- Free, with no obligation
- A clear answer on what your lot can hold
- A first look at financing eligibility, by phone or at your property
- A site visit only if it makes sense
Prefer to talk now? (424) 448-4895
Email: [email protected]
Los Angeles, CA · We come to your property
1 · Preferred time2 · Your property3 · Confirmed
Preferred day (Pacific time)
Preferred time
Tell us when to call you. A project lead calls you back at that time of day (Pacific time).
Your call is booked
We’ll confirm by text or phone. No obligation.
Service areas
Serving homeowners across Los Angeles
Los Angeles, the South Bay and Orange County, within about 40 miles of Paramount. Farther on request.
Service areas
ADU rules, city by city
Permits, fire and coastal zones, pre-approved plans: see what applies in the 36 cities we serve.
Central Los AngelesSan Fernando ValleyThousand OaksSimi ValleyParamountWest AdamsMid-CityCulver CityLong BeachDowneyWhittierNorwalkTorranceInglewoodComptonCarsonAnaheimSanta AnaIrvineHuntington BeachPasadenaGlendaleBurbankRialto (on request)Garden GroveOrangeFullertonCosta MesaNewport BeachTustinSherman OaksEncinoVan NuysWoodland HillsNorthridgeCalabasas