Choose a County
88 incorporated cities + unincorporated areas
Los Angeles County
Choose the city that contains the property, or use the County path for an unincorporated address.
View Los Angeles County18 incorporated cities + unincorporated areas
San Diego County
Choose the city that contains the property, or use the County path for an unincorporated address.
View San Diego County34 incorporated cities + unincorporated areas
Orange County
Choose the city that contains the property, or use the County path for an unincorporated address.
View Orange County24 incorporated cities + unincorporated areas
San Bernardino County
Choose the city that contains the property, or use the County path for an unincorporated address.
View San Bernardino CountyFind your City
Search by City name. If the property is outside an incorporated City, open its County page and use the unincorporated-area starting point.
Agoura HillsLos Angeles CountyAlhambraLos Angeles CountyArcadiaLos Angeles CountyArtesiaLos Angeles CountyAvalonLos Angeles CountyAzusaLos Angeles CountyBaldwin ParkLos Angeles CountyBellLos Angeles CountyBell GardensLos Angeles CountyBellflowerLos Angeles CountyBeverly HillsLos Angeles CountyBradburyLos Angeles CountyBurbankLos Angeles CountyCalabasasLos Angeles CountyCarsonLos Angeles CountyCerritosLos Angeles CountyClaremontLos Angeles CountyCommerceLos Angeles CountyComptonLos Angeles CountyCovinaLos Angeles CountyCudahyLos Angeles CountyCulver CityLos Angeles CountyDiamond BarLos Angeles CountyDowneyLos Angeles CountyDuarteLos Angeles CountyEl MonteLos Angeles CountyEl SegundoLos Angeles CountyGardenaLos Angeles CountyGlendaleLos Angeles CountyGlendoraLos Angeles CountyHawaiian GardensLos Angeles CountyHawthorneLos Angeles CountyHermosa BeachLos Angeles CountyHidden HillsLos Angeles CountyHuntington ParkLos Angeles CountyIndustryLos Angeles CountyInglewoodLos Angeles CountyIrwindaleLos Angeles CountyLa Canada FlintridgeLos Angeles CountyLa Habra HeightsLos Angeles CountyLa MiradaLos Angeles CountyLa PuenteLos Angeles CountyLa VerneLos Angeles CountyLakewoodLos Angeles CountyLancasterLos Angeles CountyLawndaleLos Angeles CountyLomitaLos Angeles CountyLong BeachLos Angeles CountyLos AngelesLos Angeles CountyLynwoodLos Angeles CountyMalibuLos Angeles CountyManhattan BeachLos Angeles CountyMaywoodLos Angeles CountyMonroviaLos Angeles CountyMontebelloLos Angeles CountyMonterey ParkLos Angeles CountyNorwalkLos Angeles CountyPalmdaleLos Angeles CountyPalos Verdes EstatesLos Angeles CountyParamountLos Angeles CountyPasadenaLos Angeles CountyPico RiveraLos Angeles CountyPomonaLos Angeles CountyRancho Palos VerdesLos Angeles CountyRedondo BeachLos Angeles CountyRolling HillsLos Angeles CountyRolling Hills EstatesLos Angeles CountyRosemeadLos Angeles CountySan DimasLos Angeles CountySan FernandoLos Angeles CountySan GabrielLos Angeles CountySan MarinoLos Angeles CountySanta ClaritaLos Angeles CountySanta Fe SpringsLos Angeles CountySanta MonicaLos Angeles CountySierra MadreLos Angeles CountySignal HillLos Angeles CountySouth El MonteLos Angeles CountySouth GateLos Angeles CountySouth PasadenaLos Angeles CountyTemple CityLos Angeles CountyTorranceLos Angeles CountyVernonLos Angeles CountyWalnutLos Angeles CountyWest CovinaLos Angeles CountyWest HollywoodLos Angeles CountyWestlake VillageLos Angeles CountyWhittierLos Angeles CountyCarlsbadSan Diego CountyChula VistaSan Diego CountyCoronadoSan Diego CountyDel MarSan Diego CountyEl CajonSan Diego CountyEncinitasSan Diego CountyEscondidoSan Diego CountyImperial BeachSan Diego CountyLa MesaSan Diego CountyLemon GroveSan Diego CountyNational CitySan Diego CountyOceansideSan Diego CountyPowaySan Diego CountySan DiegoSan Diego CountySan MarcosSan Diego CountySanteeSan Diego CountySolana BeachSan Diego CountyVistaSan Diego CountyAliso ViejoOrange CountyAnaheimOrange CountyBreaOrange CountyBuena ParkOrange CountyCosta MesaOrange CountyCypressOrange CountyDana PointOrange CountyFountain ValleyOrange CountyFullertonOrange CountyGarden GroveOrange CountyHuntington BeachOrange CountyIrvineOrange CountyLa HabraOrange CountyLa PalmaOrange CountyLaguna BeachOrange CountyLaguna HillsOrange CountyLaguna NiguelOrange CountyLaguna WoodsOrange CountyLake ForestOrange CountyLos AlamitosOrange CountyMission ViejoOrange CountyNewport BeachOrange CountyOrangeOrange CountyPlacentiaOrange CountyRancho Santa MargaritaOrange CountySan ClementeOrange CountySan Juan CapistranoOrange CountySanta AnaOrange CountySeal BeachOrange CountyStantonOrange CountyTustinOrange CountyVilla ParkOrange CountyWestminsterOrange CountyYorba LindaOrange CountyAdelantoSan Bernardino CountyApple ValleySan Bernardino CountyBarstowSan Bernardino CountyBig Bear LakeSan Bernardino CountyChinoSan Bernardino CountyChino HillsSan Bernardino CountyColtonSan Bernardino CountyFontanaSan Bernardino CountyGrand TerraceSan Bernardino CountyHesperiaSan Bernardino CountyHighlandSan Bernardino CountyLoma LindaSan Bernardino CountyMontclairSan Bernardino CountyNeedlesSan Bernardino CountyOntarioSan Bernardino CountyRancho CucamongaSan Bernardino CountyRedlandsSan Bernardino CountyRialtoSan Bernardino CountySan BernardinoSan Bernardino CountyTwentynine PalmsSan Bernardino CountyUplandSan Bernardino CountyVictorvilleSan Bernardino CountyYucaipaSan Bernardino CountyYucca ValleySan Bernardino County
Why the exact jurisdiction matters
County boundaries do not tell you which building department reviews the project. An incorporated City normally has its own local process, while the County generally handles land outside City boundaries. Confirm this before relying on a setback, fee estimate or permit timeline.
- Confirm the jurisdiction.Use the property address and parcel information, not only the mailing city.
- Read the local starting page.Identify the responsible planning and building departments and current submittal instructions.
- Discuss the whole project.Ask a qualified local professional about feasibility, early total budget and a realistic approval-to-completion schedule.
Coverage and source notes
City membership was checked against official County sources on . A page in this directory is a starting point, not a legal determination that a property is eligible for an ADU.