Cathedral City Zoning and ADU Guide for Homeowners

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Last updated November 13, 2026. Reviewed by the Cash Home Buyers CA team.

Cathedral City allows one ADU and one junior ADU on a single-family lot, and acts on a complete ADU building permit application within 60 days. This guide summarizes Chapter 9.114 of the Cathedral City Municipal Code for homeowners, including size, height, setbacks, parking, rental rules and fees, and explains what an ADU or unpermitted garage conversion means when you sell.

Cathedral City ADUs at a glance

Governing code	Cathedral City Municipal Code Chapter 9.114 (Accessory Dwelling Units)
Single-family lot	One ADU and one JADU, with the primary home making a maximum of three units
Multifamily lot	Conversion ADUs up to 25 percent of existing units (at least one); two detached ADUs; no JADUs
Review	Permit application acted on within 60 days of a completed application
Pre-approved plans	City of Cathedral City Pre-Approved ADU Program
Rentals	May be rented separately; not as a short-term vacation rental (Chapter 5.96)
Contact	Building and Safety, (760) 770-0340

Cathedral City ADU standards

JADU size	150 to 500 sq ft, inside the primary home; not allowed in an accessory structure
New detached ADU	850 sq ft for a studio or one bedroom; 1,000 sq ft for more than one bedroom; no more than two bedrooms
New attached ADU	Same caps, or 50 percent of the primary dwelling, whichever is less
Conversions	An existing legal accessory structure has no size cap; converting part of the home is limited to 50 percent of its floor area or 1,000 sq ft, whichever is less
Height	Not above the primary home, except detached units up to 16 feet; 18 feet near major transit (plus two feet to match roof pitch) or on multistory multifamily lots; attached units 25 feet or the zone limit, whichever is lower, and no more than two stories
Setbacks	Front per the zoning district; 4 feet side and rear; detached ADU 5 feet from the main home and other structures; none for conversions except fire and safety

Parking

The code requires one new parking space per ADU, with several exceptions.

No added space is required if the unit is within a half mile walking distance of public transit, in a historic district, part of the existing home or an accessory structure, in an area where on-street permits are required but not offered to the occupant, within one block of a car-share vehicle, or applied for together with a new home on the same lot.

Spaces may be in setback areas or tandem. When a garage or carport is converted or demolished for an ADU, those spaces do not have to be replaced. A JADU needs no added parking.

Fees

Applications must include the fee set by city council resolution. The city may not charge an impact fee on an ADU under 750 square feet. For an ADU of 750 square feet or more, any impact fees are charged proportionately to the square footage of the primary home.

Where ADUs are not allowed

The code bars ADUs on lots that are not zoned for one-family or multiple-family residential use and that do not include a proposed or existing primary dwelling. JADUs are not allowed on multifamily lots, and a JADU cannot be placed in an accessory structure.

How the Cathedral City process works

Check your lot. Confirm zoning and development standards, including setbacks and lot coverage.
Consider the Pre-Approved ADU Program. The city accepts pre-approved plans that meet Chapter 9.114 standards, which may shorten design time.
Apply for the permit. Submit the building permit application with the fee. The city has 60 days from a complete application.
Pay fees and inspect. Schedule inspections Monday through Thursday through Building and Safety.
Final sign-off. Keep the finaled permit with your records.

ADUs, garage conversions and selling a Cathedral City house

Many older homes have a converted garage or backyard unit built without permits, and the city lists illegal garage conversions and other added structures among its common code violations. Buyers and lenders ask about them, and California sellers generally disclose known unpermitted work. Our guide to selling as-is with unpermitted work explains the rules, and our Prop 13 guide explains how new construction can affect property tax. A short checklist:

Check city records for permits on any ADU, conversion or addition.
Ask Planning whether the structure could qualify under Chapter 9.114.
Estimate plans, fees and corrections needed to legalize it.
Compare that with selling as-is and letting a cash buyer take on the legalization.

Questions to ask Planning before you design

Does my lot’s zoning allow an ADU, and what lot coverage limits apply?
Does a pre-approved plan fit my lot?
What impact fees apply for the size I am considering?
Can my existing garage or accessory structure be converted without changing its footprint?

Why ADUs matter for resale

A permitted ADU can add rental income and appeal for some buyers, but an unpermitted one can complicate financing and appraisal. Lenders typically want permitted living area, and an appraiser may not count unpermitted space. Because Cathedral City allows an ADU to be rented separately but not as a short-term vacation rental, buyers who plan to use a unit for nightly stays should read Chapter 5.96 first.

How to sell a house in Cathedral City

Check which structures on the property are permitted ADUs, conversions or unpermitted.
Collect permits, plans and any city notices.
Request a no-obligation cash offer for the house as it stands.
Choose your closing date.
Close with no legalization, repairs or showings required.

Our local pages cover related situations in Cathedral City, including selling as-is, selling fast, relocating and the cash offer process. See also our Cathedral City page and the Riverside County hub.

Own a Cathedral City home with an ADU or garage conversion? Sell as-is for cash.

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Frequently asked questions

How many ADUs can I have on a Cathedral City single-family lot?

One ADU and one junior ADU, so the lot can hold a maximum of three units including the primary home.

How long does the city take to review an ADU permit?

The code says the building permit application must be acted on within sixty days of receiving a completed application when a home already exists on the lot.

How big can a Cathedral City ADU be?

New detached ADUs are up to 850 square feet for a studio or one bedroom and 1,000 square feet for more, with no more than two bedrooms. JADUs are 150 to 500 square feet.

Does an ADU need parking?

One space per ADU is required unless an exception applies, such as being within a half mile walking distance of transit. A JADU needs none.

Can I rent my Cathedral City ADU?

Yes, separately from the main home, but not as a short-term vacation rental under Chapter 5.96.

Are there impact fees for ADUs?

No impact fee applies to an ADU under 750 square feet. Larger ADUs are charged proportionately to the primary home’s square footage.

Can I sell my Cathedral City house with an unpermitted ADU or garage conversion?

Yes. You can disclose it and sell as-is, including to a cash buyer. Our statewide guide explains the disclosure rules.

More guides

Sources

This guide is general information from public sources, not legal advice. Confirm current rules, fees and hours with the city.