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Accessory Dwelling Unit (ADU) Permit in Fresno, California

Fresno runs a pre-approved plan programme: 'The City of Fresno's ADU Program encourages the development of accessory dwelling units (ADUs) by offering a selection of pre-approved plans to homeowners.' There are 'five pre-approved plans and three design elevations to choose from for each plan.'

Verified 2026-09-11 · Source

When you need this permit

  • The pre-approved plans are not limited to accessory use - they 'can also be used to build small primary homes to help first-time buyers enter the housing market or assist those seeking to downsize.'
  • 'Pre-approved plans include plans for solar panels.'
  • Fire sprinklers are conditional, not automatic: 'Fire sprinklers may be required for ADU's under certain circumstances.' - for example where 'the primary residence is fire sprinklered, generally the ADU must also be fire sprinklered, or when the ADU will be too close to a property line or adjacent residence.'
  • Sprinklers can be the cheaper route: they 'are allowed to be installed as a substitute when the location has deficient fire department access or fire water supplies (including hydrant placement).'

Required documents

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Fee schedule

Accessory Dwelling Unit (ADU) Permit feesFresno states 'Payment of all applicable fees shall be due at this time.' at issuance. No dollar figures are published on the Building Permit Center page and none are asserted here.
Due at permit issuance

Review timeline

Plan review
Not published — contact the department

How long did your Accessory Dwelling Unit (ADU) Permit permit actually take in Fresno?

Anonymous — one question, no email. Answers are combined and only shown once at least 5 people have reported.

Inspection process

  1. 1

    Construction inspection

    Fresno's Inspection Services Division. An APPROVED INSPECTION also moves the permit expiration to 180 days from that inspection.

Tips

  • A PRE-APPROVED PLAN IS NOT A PRE-APPROVED SITE. Fresno resolves fire access and water supply when 'the ADU pre-construction site (or plot) plans are submitted for review and approval' - the plan choice does not settle it.
  • SPRINKLERS MAY BE THE CHEAPER ANSWER, not just an extra cost - Fresno says they are allowed as a SUBSTITUTE where fire department access or water supply is deficient.
  • THE PLANS CARRY SOLAR WITH THEM, so the solar design is not a separate exercise for a pre-approved ADU.

Frequently asked questions

Fresno requires an accessory dwelling unit (adu) permit for: The pre-approved plans are not limited to accessory use - they 'can also be used to build small primary homes to help first-time buyers enter the housing market or assist those seeking to downsize.'; 'Pre-approved plans include plans for solar panels.'; Fire sprinklers are conditional, not automatic: 'Fire sprinklers may be required for ADU's under certain circumstances.' - for example where 'the primary residence is fire sprinklered, generally the ADU must also be fire sprinklered, or when the ADU will be too close to a property line or adjacent residence.'; Sprinklers can be the cheaper route: they 'are allowed to be installed as a substitute when the location has deficient fire department access or fire water supplies (including hydrant placement).'. If your project isn't listed, confirm with City of Fresno - Planning and Development Department, Building and Safety Services Division at 559.621.CITY (559.621.2489), or call 311 before starting work.

In Fresno, the published Accessory Dwelling Unit (ADU) Permit fees is: Due at permit issuance. These are the jurisdiction's own published figures — see the fee schedule table and source citations on this page.

Fresno does not publish a plan-review timeline for this permit. Contact City of Fresno - Planning and Development Department, Building and Safety Services Division at 559.621.CITY (559.621.2489), or call 311 for current turnaround.

You'll need: Permit application at the Building and Safety Permit Counter. See the required-documents checklist on this page for details on each.

Fresno requires 1 inspection(s) for an accessory dwelling unit (adu) permit, in order: Construction inspection. Schedule each through City of Fresno - Planning and Development Department, Building and Safety Services Division (559.621.CITY (559.621.2489), or call 311).

Apply through City of Fresno - Planning and Development Department, Building and Safety Services Division at 2600 Fresno Street, Fresno, CA 93721. Phone: 559.621.CITY (559.621.2489), or call 311. Office hours: NOT ASSERTED. No counter hours appear on Fresno's Building Permit Center or Building and Safety pages, so none are stated here.. Official information: https://www.fresno.gov/planning/building-and-safety/.

Fresno, California has adopted: California Building Code as adopted statewide - Fresno quotes Chapter 1 sections 105.1, 105.3, 105.4 and 105.5 directly on its Building Permit Center page. NO EDITION YEAR IS ASSERTED: the page cites the CBC without naming an edition, and Fresno's adopting ordinance was not read.. Local amendments apply — see the Fresno overview page for the full list.

Yes - five pre-approved plans with three design elevations each, and the plans include solar panels. They may also be used to build a small primary home rather than an accessory unit.

Sources & verification

Verified against official sources. Last reviewed 2026-09-11.

Department & other records

Fees, timelines, and adopted codes are researched from each jurisdiction's published records — see how we verify. Requirements change and vary by project, so always confirm the current details with the Fresno building department before you submit. PermitBase is an independent reference and is not affiliated with any government agency.

Fresno's permit history isn't searchable here yet

This page covers what the permit requires. What we don't have for Fresno yet is the record of permits actually issued — the history you'd search by street address. That is a gap in our coverage, not a statement about any particular property.

Your email, and the place — never an address. We only use it to tell you when Fresno lands. Privacy.

Other permits in Fresno

Residential Building PermitElectrical PermitPlumbing PermitMechanical PermitResidential Solar Permit (SolarAPP+)

Accessory Dwelling Unit (ADU) Permit in other cities

Long Beach, CaliforniaOakland, CaliforniaSacramento, CaliforniaSan Diego, CaliforniaSan Jose, CaliforniaAult, ColoradoBennett, ColoradoBerthoud, Colorado

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