County directory

Riverside County ADU rules

Each place name links to that city or county's own ADU page. Places with a 'See our rules summary' button also have our plain-language summary of the local ADU rules, with sources. Each place below says whether we show local rules or California state rules.

Places in Riverside County

Banning (opens the government site in a new tab)See our rules summary
Showing California state rules, plus Banning details
The size, setback, height, and parking figures are California state rules. The Banning section lists the local details we have on file, like plans, forms, and contacts.
Beaumont (opens the government site in a new tab)See our rules summary
Showing Beaumont city rules
These are Beaumont's own ADU rules on file, shown with the California state rules they build on. Each item says which is which.
Where a Beaumont rule may conflict with state law or is being challenged, we show the California state rule instead. This covers owner-occupancy rules for junior ADUs.
Blythe (opens the government site in a new tab)
Showing California state rules because Blythe's local rules may conflict with state law or are being challenged
We show the state rules for an outdated rule that the owner must live in the main house. Check with Blythe about how it handles this today.
Calimesa (opens the government site in a new tab)
Showing California state rules because Calimesa's local rules may conflict with state law or are being challenged
We show the state rules for a one-ADU-and-one-junior-ADU limit, a two-detached-ADU limit on multifamily lots, a 50% size cap for attached ADUs, and owner-occupancy rules for junior ADUs. Check with Calimesa about how it handles this today.
Canyon Lake (opens the government site in a new tab)See our rules summary
Showing California state rules because Canyon Lake's local rules may conflict with state law or are being challenged
The size, setback, height, and parking figures are California state rules. The Canyon Lake section lists the local details we have on file, like plans, forms, and contacts.
Where a Canyon Lake rule may conflict with state law or is being challenged, we show the California state rule instead. This covers a step that requires homeowners association sign-off as part of the ADU application.
Cathedral City (opens the government site in a new tab)See our rules summary
Showing Cathedral City city rules
These are Cathedral City's own ADU rules on file, shown with the California state rules they build on. Each item says which is which.
Where a Cathedral City rule may conflict with state law or is being challenged, we show the California state rule instead. This covers a size cap for attached ADUs (850 sq ft for a studio or one bedroom, or 1,000 sq ft for more than one bedroom, or 50% of the existing home, whichever is less) without the 800 square foot minimum state law “guarantees”, a rule keeping attached and larger detached ADUs to the rear or side of the home, and a 5-foot separation from other buildings.
Coachella (opens the government site in a new tab)
Showing California state rules because Coachella's local rules may conflict with state law or are being challenged
We show the state rules for a size cap for attached ADUs (50% of the home, up to 1,200 sq ft) described on the City's ADU page; the City's code could not be read for this summary. Check with Coachella about how it handles this today.
Corona (opens the government site in a new tab)See our rules summary
Showing Corona city rules
These are Corona's own ADU rules on file, shown with the California state rules they build on. Each item says which is which.
Where a Corona rule may conflict with state law or is being challenged, we show the California state rule instead. This covers owner-occupancy rules for junior ADUs and a related deed restriction.
Desert Hot Springs (opens the government site in a new tab)See our rules summary
Showing California state rules because a local rule change is pending
The size, setback, height, and parking figures are California state rules. The Desert Hot Springs section lists the local details we have on file, like plans, forms, and contacts.
Where a Desert Hot Springs rule may conflict with state law or is being challenged, we show the California state rule instead. This covers a rule against ADUs on septic lots smaller than 1 acre.
A local rule change is pending. A draft update to the city's ADU rules (Chapter 17.08) is waiting for a City Council vote. We'll add the new local rules after they take effect and we've reviewed them.
Eastvale (planning page) (opens the government site in a new tab)
Showing California state rules because a local rule change is pending
A local rule change is pending. The City adopted new ADU rules in 2026 (Ordinance 26-01) after a February 2025 state housing department letter on its earlier rules, and the new text in its online code could not be read for this summary. We'll add the new local rules after they take effect and we've reviewed them.
Hemet (opens the government site in a new tab)See our rules summary
Showing California state rules, plus Hemet details
The size, setback, height, and parking figures are California state rules. The Hemet section lists the local details we have on file, like plans, forms, and contacts.
Indian Wells (opens the government site in a new tab)See our rules summary
Showing Indian Wells city rules
These are Indian Wells's own ADU rules on file, shown with the California state rules they build on. Each item says which is which.
Indio (opens the government site in a new tab)
Showing California state rules because Indio's local rules may conflict with state law or are being challenged
We show the state rules for an ADU ordinance on file from 2020 that may be out of date. Check with Indio about how it handles this today.
Jurupa Valley (opens the government site in a new tab)See our rules summary
Showing Jurupa Valley city rules
These are Jurupa Valley's own ADU rules on file, shown with the California state rules they build on. Each item says which is which.
Where a Jurupa Valley rule may conflict with state law or is being challenged, we show the California state rule instead. This covers an extra planning application for ADUs over 800 sq ft.
La Quinta (opens the government site in a new tab)
Showing California state rules because La Quinta's local rules may conflict with state law or are being challenged
We show the state rules for parts of its ADU ordinance, such as how many units are allowed and owner-occupancy rules for junior ADUs (raised in a 2026 state housing department letter). Check with La Quinta about how it handles this today.
Lake Elsinore (opens the government site in a new tab)See our rules summary
Showing California state rules, plus Lake Elsinore details
The size, setback, height, and parking figures are California state rules. The Lake Elsinore section lists the local details we have on file, like plans, forms, and contacts.
Menifee (opens the government site in a new tab)See our rules summary
Showing California state rules, plus Menifee details
The size, setback, height, and parking figures are California state rules. The Menifee section lists the local details we have on file, like plans, forms, and contacts.
Moreno Valley (opens the government site in a new tab)See our rules summary
Showing California state rules because Moreno Valley's local rules may conflict with state law or are being challenged
The size, setback, height, and parking figures are California state rules. The Moreno Valley section lists the local details we have on file, like plans, forms, and contacts.
Where a Moreno Valley rule may conflict with state law or is being challenged, we show the California state rule instead. This covers limits on conversions and on combining ADU types (raised in a 2024 state housing department letter).
Murrieta (opens the government site in a new tab)See our rules summary
Showing California state rules, plus Murrieta details
The size, setback, height, and parking figures are California state rules. The Murrieta section lists the local details we have on file, like plans, forms, and contacts.
Norco (planning page) (opens the government site in a new tab)
Showing California state rules because Norco's local rules may conflict with state law or are being challenged
We show the state rules for a 10 ft separation rule, no ADUs in front yards, a rule that detached ADUs sit behind the home, animal-keeping area rules applied to all ADUs, and a ban on new septic systems for ADUs. Check with Norco about how it handles this today.
Palm Desert (planning page) (opens the government site in a new tab)See our rules summary
Showing Palm Desert city rules
These are Palm Desert's own ADU rules on file, shown with the California state rules they build on. Each item says which is which.
Palm Springs (opens the government site in a new tab)See our rules summary
Showing Palm Springs city rules
These are Palm Springs's own ADU rules on file, shown with the California state rules they build on. Each item says which is which.
Perris (main website) (opens the government site in a new tab)
Showing California state rules because Perris's local rules may conflict with state law or are being challenged
We show the state rules for a one-attached-ADU-and-one-junior-ADU limit, a ban on a junior ADU where part of the home becomes an ADU, a 320 sq ft minimum for conversions and junior ADUs, and size caps (50% of the home for attached ADUs, 75% for detached) without the state 800 sq ft floor. Check with Perris about how it handles this today.
Rancho Mirage (opens the government site in a new tab)
Showing California state rules because Rancho Mirage's local rules may conflict with state law or are being challenged
We show the state rules for an ADU ordinance on file from 2019 that may be out of date. Check with Rancho Mirage about how it handles this today.
Riverside (opens the government site in a new tab)See our rules summary
Showing Riverside city rules
These are Riverside's own ADU rules on file, shown with the California state rules they build on. Each item says which is which.
Where a Riverside rule may conflict with state law or is being challenged, we show the California state rule instead. This covers owner-occupancy rules for junior ADUs.
San Jacinto (code) (opens the government site in a new tab)See our rules summary
Showing San Jacinto city rules
These are San Jacinto's own ADU rules on file, shown with the California state rules they build on. Each item says which is which.
Temecula (opens the government site in a new tab)See our rules summary
Showing California state rules, plus Temecula details
The size, setback, height, and parking figures are California state rules. The Temecula section lists the local details we have on file, like plans, forms, and contacts.
Wildomar (opens the government site in a new tab)See our rules summary
Showing California state rules, plus Wildomar details
The size, setback, height, and parking figures are California state rules. The Wildomar section lists the local details we have on file, like plans, forms, and contacts.
Unincorporated Riverside County (opens the government site in a new tab)
Showing California state rules, plus a summary of Riverside County's own rules
The size, setback, height, and parking figures are California state rules. The Riverside County section summarizes the County's new ADU ordinance (No. 348.5056), which allows some larger sizes than the state figures shown. Where they differ, ask Riverside County which one applies to your project.

All counties in the ADU directory