Fresno Zoning and ADU Guide for Homeowners and Sellers

Last updated November 13, 2026. Reviewed by the Cash Home Buyers CA team. Information comes from the City of Fresno Planning Department; sources are listed at the end.

Fresno runs an ADU program with five free pre-approved plans, and both pre-approved and custom ADU plans now go straight to a Building Permit application without a separate Zone Clearance. Whether a backyard unit on your property is legal depends on whether it went through that permit process.

Fresno ADU rules at a glance

Who administers it	City of Fresno Planning Department, ADU Program
Permit needed	Yes. Applications are submitted directly for a Building Permit
Zone Clearance	No longer required for pre-approved or custom ADU plans
Pre-approved plans	Five free plans, with three design elevations for each
Pre-approved plan sizes	From 340 square feet (Plan 1) to 1,015 square feet (Plan 5)
ADU program phone	(559) 621-8077
Building permits phone	559.621.8084
Guidebook	The city publishes an ADU and Small Home Guidebook covering development and building requirements

How does the Fresno ADU program work?

The city offers five pre-approved plans, ranging from a 340-square-foot unit to one of 1,015 square feet, each with design elevations to choose from. Homeowners can use one of them or submit a custom design. Either way, the application goes directly in as a Building Permit.

The city’s ADU and Small Homes Guidebook explains development and building requirements for units on a lot, so check that before assuming a space is allowed.

The city’s code enforcement page lists improper zoning use and construction without permits as violations it handles, so an unpermitted unit can draw a complaint as well as a buyer’s questions. See our Fresno code enforcement guide for how that process works.

How ADUs and zoning affect selling a house in Fresno

A permitted ADU can be a selling point, but a converted garage or backyard unit with no permit is something buyers’ inspectors and lenders flag. In California, sellers generally have to disclose known unpermitted work. Your choices are to permit the unit, remove it, discount the price, or sell as-is to a cash buyer who accounts for the risk.

How to sell a house in Fresno with an unpermitted ADU

1. Check the permit history. Search the address in the Accela portal to see whether the unit was ever permitted.
2. Check for complaints. Make sure no code case is open on the property.
3. Weigh the options. Permit it, convert it back, sell with a credit, or sell as-is.
4. Disclose honestly. A cash offer does not change what you must disclose, but it removes repairs and inspections from the timeline.

We buy Fresno houses as they are, including houses with converted garages and backyard units. Read how selling a house as-is in Fresno works, or see our Fresno cash-offer process. For permit history see our Fresno building permits guide.

Not sure whether your unit is legal? Call (424) 435-2326 or request a cash offer. There is no cost and no obligation.

The five pre-approved plans in detail

The city’s ADU Program page lists Plan 1 as a studio with one bath at 340 square feet; Plan 2 as one bedroom, one bath at 499; Plan 3 as one or two bedrooms with one bath at 625; Plan 4 as the Plan 3 layout over a garage; and Plan 5 as a three-bedroom, two-bath unit of 1,015 square feet.

Each comes in Craftsman, Contemporary and Gable elevations. A pre-approved ADU cost estimator is available to download from the program page, and questions can go to adu@fresno.gov or (559) 621-8077.

Size limits in the city’s guidebook

The ADU and Small Home Guidebook says a new attached ADU may be up to 50 percent of the size of the existing home or 1,200 square feet, whichever is less. It also covers converting an existing detached structure or part of the main home, and walks through researching your property before you design. Use the current guidebook rather than an older summary, because state ADU law changes often.

Sheds are not ADUs

The city’s single-family page says a one-story detached accessory structure used as a tool or storage shed or playhouse generally does not need a building permit when it does not exceed 120 square feet, is no taller than 12 feet and meets setbacks.

A structure with sleeping, cooking or bathroom facilities is a different matter, and a converted shed that people live in is a common source of unpermitted-unit problems at sale.

What buyers and lenders ask about an ADU

• Is the unit permitted and finaled, or only built?
• Does it have its own entrance, kitchen and utilities, and is it rented?
• Does the listed square footage include it?
• Is there a pending or past code complaint?

For how California sellers approach unpermitted improvements in general, see our California guide to selling as-is with unpermitted work.

Fresno zoning and ADU FAQ

Does Fresno offer pre-approved ADU plans?

Yes. The city offers five free pre-approved plans with three design elevations for each.

Do I need a Zone Clearance for a Fresno ADU?

No. Pre-approved and custom ADU plans no longer need a Zone Clearance, and applications go straight in for a Building Permit.

Can I sell a Fresno house with an unpermitted ADU?

Yes. The sale is not legally blocked, but you should disclose the unit. A cash buyer can purchase the house as-is with the unit unpermitted.

Who do I call about Fresno ADU questions?

The city’s ADU Program page lists (559) 621-8077. For building permits, call 559.621.8084.

What sizes are the Fresno pre-approved ADU plans?

The city lists Plan 1 at 340 square feet, Plan 2 at 499, Plan 3 at 625 and Plan 5 at 1,015, with Plan 4 using the Plan 3 layout over a garage.

Does Fresno list a size limit for an attached ADU?

The city’s ADU and Small Home Guidebook says a new attached ADU may be up to 50 percent of the size of the existing home or 1,200 square feet, whichever is less.

Sources

• City of Fresno: ADU Program
• City of Fresno: ADU and Small Home Guidebook
• City of Fresno: Code Enforcement

This guide is general information, not legal advice. ADU rules change often; confirm requirements with the City of Fresno Planning Department.