Building an ADU in Fresno, California

Learn permits, rules, and guides to building in Fresno County

Overview

Fresno is located in Fresno County in California. Fresno has a total population of 494665 over a land mass of 111.96 Square Miles. When it comes to ADUs, the city allows for 1+ ADUs on a given property, and a square footage of 850-1,000 sf

Number of ADUs Allowed

1+

Size of ADU Allowed

850-1,000 sf

Types of ADUs Allowed

Detached, Junior, Attached

Permit Cost

Coming Soon

Number of ADUs allowed

Under state law, each single-family home may now construct at least one Accessory Dwelling Unit (ADU). Owner occupied single-family parcels may construct one Accessory Dwelling Unit (ADU) and one JADU. Multi-family parcels, per every four existing residential units, may construct one Accessory Dwelling Unit (ADU), so long as the existing units were legally established.

Property Requirements

Single-family and multi-family Properties will be allowed to construct up to 850 sq.ft. for a one bedroom ADU or up to 1,000 sq.ft. for a two bedroom ADU, regardless of the underlying zoning standards of the property. A Junior Accessort Dwelling Unit (JADU) up to 500 sq.ft. is allowed. The minimum size of any living unit (including Accessory Dwelling Units and Junior Accessort Dwelling Unit (JADU)s) is 150 sq.ft. according to Califronia Residential Code. ~ Updated: State Law AB-68

Types of ADUs Allowed

Attached ADU

An attached ADU is one that is attached to your house. Also know as Addition ADUs or “bump-out ADUs. These types of ADUs can be accessed from the primary house with a door in the connection point, but also can be independent of the main home.

Dettached ADU

A detached ADU is not connected to your primary house. The dwelling needs to be within your property setbacks and allowable building size (both height and square footage).

Junior ADU

Junior Accessory Dwelling Units (JADUs) are named this way because they are small (up to 500 square feet).

In California, the recent state bills AB68 and AB 881 permits both an ADU and a Junior ADU (JADU) on the same lot with a proposed or existing single-family dwelling. This means you can have two units on your lot: ADU, and JADU.

Property Requirements

Ownership
Owner-occupancy will not be required for new Accessory Dwelling Unit (ADU)s (conversion and new construction) built between 2020 and 2025. ~ Updated: State Law SB-13
Number of ADUs Allowed
Under state law, each single-family home may now construct at least one Accessory Dwelling Unit (ADU). Owner occupied single-family parcels may construct one Accessory Dwelling Unit (ADU) and one JADU. Multi-family parcels, per every four existing residential units, may construct one Accessory Dwelling Unit (ADU), so long as the existing units were legally established.
ADU Size
Residential properties will not be subject to any minimum lot size for Accessory Dwelling Unit (ADU)s by ordinance or of the underlying zoning district. ~ AB-68
Parking
Properties which convert an existing garage to an Accessory Dwelling Unit (ADU) or Junior ADU will not be subject to replacement parking requirements. ~ AB-68
Height
Height will be restricted to the maximum height of the underlying zone.
Fire Safety
The ADU will not require fire sprinklers unless they are also required in the primary home.
Utility Connections
Q. Utility Meters/Addresses. 1. Accessory dwelling Units. Separate gas and electric meters may be permitted if approved by the Building Official and Pacific Gas & Electric. 2. Backyard Cottage and Accessory accessory dwelling. Separate utility meters and/or addresses are not permitted.
Aesthetic
The ADU should resemble the primary home is designed, massing and material selection.
Set backs
The maximum required setback for a detached new construction ADU shall be no more than 4 ft from the rear and side property lines. Setbacks will not be required for ADUs and JADUs converted from existing space that was legally eastablished. Attached ADUs and conversions from existing space to be expanded will be required to comply with the setbacks of the underlying zone. ~ Updated: State Law AB-68

Design Review

An accessory dwelling unit shall be approved through a ministerial review process, according to state law.

Next Steps

To get started on your ADU, here are some first steps.

Call Your City

Search Google for your city’s contact number. An example would “City of Phoenix Residential Permits Contact Number”

You can call the main line and get directed to the permitting department.

Ask these questions...

1) Can I put a secondary home on my lot (Accessory Dwelling Unit)
2) What are my livable setbacks, and ADU size regulations?
3) Can I put a prefabricated guest house on my property?

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