Local zoning · Fresno County

Fresno County — Historic Preservation

Q: If my house is in the HP overlay, can I demolish or replace it?

Demolition, alteration, or additions to structures in the HP Overlay are subject to review by the Fresno County Historic Landmarks and Records Advisory Commission and require a Certificate of Appropriateness; only emergency health/safety work is excepted without Commission authorization. § 818.2.090.A.2–4

Historic Preservation under the Fresno County local zoning and planning code, with the controlling citations.

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Last reviewed: July 3, 2026

Overview

This page explains how the Fresno County Zoning Ordinance regulates historic preservation in the unincorporated areas of Fresno County. The County uses a designated overlay, specific review procedures, and a Certificate of Appropriateness process to protect inventoried historic resources; the overlay works on top of the underlying base zone standards and does not automatically change permitted uses. See the Fresno County Zoning page for the ordinance context and code structure.

How to read this page

All rules below are limited to unincorporated areas of Fresno County.
Every ordinance reference includes the controlling code paragraph (bolded) and a citation to the uploaded Fresno County Zoning Ordinance text.
Links in the text point to Fresno County topic pages you will commonly need (zoning, overlays, parking, design review, development standards) and to the state ADU and building-code pages where noted.

District-by-district breakdown

HP (Historic Preservation) Overlay — purpose, process and effect

Purpose: The HP (Historic Preservation) Overlay is intended to promote preservation of resources listed in the resource inventory maintained by the Fresno County Historic Landmarks and Records Advisory Commission (the Commission) and to recognize unique architectural and historic places in unincorporated areas. § 818.2.090 .
How it gets placed: A property owner whose property appears on the Commission’s resource inventory may submit an Amendment (Rezone) Application to place the HP Overlay on the parcel. All sites in the overlay are treated as historic. § 818.2.090.A .
Review required: Demolition, alteration, or addition to any structure in the HP Overlay is subject to review by the Commission; no structural or other alterations are permitted without Commission authorization except to address immediate health or safety issues. § 818.2.090.A.2–4 .
Permit type: The Commission issues a Certificate of Appropriateness that may approve, conditionally approve, or deny proposed demolition/alteration/addition. Commission approvals are final; denials are appealable to the Board of Supervisors. § 818.2.090.B .
Required findings: Approvals require findings including (1) no adverse effect on significant architectural features/character; (2) consistency with CEQA; (3) consistency with applicable zoning provisions (or that inconsistencies are addressed); and (4) consistency with General Plan policies. § 818.2.090.C .
Interaction with underlying zone: Except where the overlay imposes specific review restrictions, “all provisions of the underlying Zone District shall apply.” That means base-zone permitted uses, setbacks, heights, and other development standards remain in effect unless specifically modified by an approved land use action. § 818.2.090.A.5 .
Practical note: The HP overlay is an overlay/combining zone; see the County overview of Overlay Districts for procedural context.

(First natural mention of "Overlay" above links to the Fresno County Overlay Districts page.)

How the overlay interacts with commonly-encountered base zones

Fresno County applies the HP Overlay over whatever underlying base zone the parcel already carries. Below are the common base zones you will encounter in inventory areas and where to find their permitted uses and standards.

R-1 (Single-Family Residential) — purpose and permitted uses: See § 810.2.010 and permitted-uses lists in § 810.2.020 for the R-1 district; general development standards (setbacks, heights, lot coverage) are in § 810.2.030. Work inside an HP overlay in R-1 remains subject to the HP Certificate of Appropriateness process in addition to the base-zone rules. § 810.2.010–030 .
C- (Commercial zones) — purpose and uses: See § 812.2.010–030 for the County’s commercial zones (permitted commercial uses and dimensional standards). Any construction or alteration in a commercial parcel with the HP overlay must comply with both commercial zone standards and the Commission’s Certificate of Appropriateness findings. § 812.2.010–030 .
AE (Exclusive Agricultural) and other Agricultural zones — purpose and uses: The agricultural zones and their development standards are summarized in § 808.2.010–040; if a farmstead or rural structure is inventoried and the owner requests the HP overlay, agricultural-use rules still apply, plus historic-review constraints. § 808.2.010–040 .
Where to find underlying rules: The County’s base-zone and development standards live in the Zoning Ordinance (see Table 2‑1 and the chapter indexes); consult the Fresno County Development Standards page and the specific chapters cited above for exact setbacks, coverage, and height limits. § 806.2.010 .

(First natural mention of "Fresno County Development Standards" above links to that internal page.)

Key decision-relevant standards (at-a-glance)

Topic / action	Key rule summary	Code Reference
Establishing HP overlay on a parcel	Owner may apply for an Amendment / Rezone to place the HP overlay if property is on the Commission’s inventory.	§ 818.2.090.A
Review for demolition/alteration/addition	Any demolition, alteration, or addition in the HP overlay requires Commission review; alterations only for health/safety are excepted.	§ 818.2.090.A.2–4
Certificate of Appropriateness	Commission issues Certificate (approve/condition/deny); denials are appealable to Board of Supervisors.	§ 818.2.090.B
Findings the Commission must make	No adverse effect on architectural features; CEQA consistency; zoning compliance or mitigation; General Plan consistency.	§ 818.2.090.C
Site Plan / construction review	For permitted uses, construction activities (additions, alterations) generally require Director-approved Site Plan Review per Chapter § 854.5.	§ 854.5
ADU parking exception within historic districts	Additional parking for ADUs is NOT required if the ADU “is located within a historic district.” (Note: ADU size/other ADU standards are separate.)	§ 834.4.030(e)(3)(ii)
Underlying zone remains effective	Aside from Commission-authorized restrictions, the underlying Zone District provisions continue to apply.	§ 818.2.090.A.5

(First natural mention of "Site Plan Review" above links to the Fresno County Design Review page; first mention of "parking" links to Fresno County Parking. First mention of "ADUs" below links to California ADU law.)

Note: Building permits and compliance with the state building code remain required for structural work; see the California Building Standards Code for building-permit rules.

Practical guidance and interpretation (plain-English synthesis)

The HP Overlay is an opt‑in overlay for inventoried properties — it does not drop from the sky onto all older houses. § 818.2.090.A .
Once the HP Overlay is on a parcel, routine changes that alter the historic fabric (exterior walls, rooflines, significant details) are reviewed by the Commission and require a Certificate of Appropriateness; routine interior work or emergency health/safety repairs are the limited exceptions. § 818.2.090.A.2–4 .
You will generally need to process both the HP review and whatever permits the base zone requires: for construction, expect a Site Plan Review (Director or Commission depending on the project) and any building permits consistent with the California Building Standards Code. § 854.5
Small policy wins: ADUs located within a historic district can qualify for the ADU parking exception; plan ADU proposals with this in mind. § 834.4.030(e)(3)(ii)

(First natural mention of "parking" linked earlier to Fresno County Parking; first natural mention of "design review" linked earlier to Fresno County Design Review.)

Checklist — what an applicant must satisfy (unincorporated Fresno County)

Confirm the property is listed in the Commission’s resource inventory (only listed properties can opt into the overlay). § 818.2.090.A
If not already overlaid, submit an Amendment (Rezone) Application to add the HP Overlay to the parcel (owner-initiated). § 818.2.090.A
For demolition/alteration/addition: prepare submittal materials sufficient for the Commission (plans, elevations, historic description) and apply for a Certificate of Appropriateness. § 818.2.090.B–C
Complete CEQA analysis or determine CEQA exemption as required; the Commission’s findings require CEQA consistency. § 818.2.090.C.2
File any required Site Plan Review and other Director/Department submittals for construction activity (Chapter § 854.5). § 854.5
If proposing an ADU, note the ADU parking exceptions for historic districts and plan parking accordingly. § 834.4.030(e)(3)(ii)
If the Commission denies a Certificate, prepare for an appeal to the Board of Supervisors (if you intend to appeal). § 818.2.090.B

Risks & Ambiguities

Issue	Why it matters	What to verify
Whether a property is actually on the Commission’s inventory	Only inventoried properties can opt into the overlay; assuming coverage can waste time.	Verify inventory listing with the Commission or Department. § 818.2.090.A
CEQA scope for proposed work	CEQA review may be required and can add time/cost; Commission must find CEQA consistency.	Identify whether the project is exempt or requires an EIR/MND. § 818.2.090.C.2
Confusion about base-zone standards vs HP restrictions	Developers often assume the overlay replaces base-zone rules — it generally does not.	Confirm which base-zone standards (setbacks, lot coverage, height) still apply for your parcel in § 810.2 / § 812.2 / § 808.2 as applicable and that the overlay adds review only. § 818.2.090.A.5
Scope of "alteration" that triggers review	The ordinance shields health/safety emergency work but is otherwise broad; scope can be litigated.	Get written confirmation from the Commission/Director for borderline cases. § 818.2.090.A.4
Nonconforming structures or uses	Historic structures may be legally nonconforming; interplay with HP review can be complex.	Check Chapter § 870.6 on Nonconforming Uses, Structures, and Parcels and consult the Department.

Plain-English Summary

If your property in unincorporated Fresno County is on the County’s historic resource inventory and you (the owner) request the HP overlay, exterior demolition or changes will be reviewed by the Fresno County Historic Landmarks and Records Advisory Commission and require a Certificate of Appropriateness showing no harm to the resource, CEQA consistency, and zoning/General Plan consistency; underlying zoning rules (setbacks, heights, permitted uses) still apply. § 818.2.090

Source References

Fresno County Zoning Ordinance, § 818.2.090 — Historic Preservation (HP Overlay).
Fresno County Zoning Ordinance, § 854.5 — Site Plan Review (construction/site review procedures).
Fresno County Zoning Ordinance, § 834.4.030 — Additional On‑Site Dwellings (ADU parking exception for historic districts).
Fresno County Zoning Ordinance, § 806.2.010 (Zones Established; Table 2‑1 listing R‑1, AE, etc.).
Fresno County Zoning Ordinance, § 810.2.010–030 (Residential zone purpose, permitted uses, development standards).
Fresno County Zoning Ordinance, § 812.2.010–030 (Commercial zone purpose and standards).
Fresno County Zoning Ordinance, § 808.2.010–040 (Agricultural zones).
Fresno County Zoning Ordinance, § 870.6 (Nonconforming Uses, Structures, and Parcels).

Additional internal resources:

Fresno County Zoning & planning overview: Fresno County zoning & planning overview
Fresno County Zoning: Fresno County Zoning
Overlay Districts: Fresno County Overlay Districts
Fresno County Development Standards: Fresno County Development Standards
Site review / design context: Fresno County Design Review
Parking rules (ADU parking exception noted above): Fresno County Parking
ADU law (state guidance): California ADU law
State building code reference: California Building Standards Code

Sources

Retrieved passages

Fresno County Zoning Code (Chapter 818.2) High relevance
Fresno County Zoning Code (Chapter 818.2) High relevance
Fresno County Zoning Code (CHAPTER 818.2) Medium relevance
CBC § 800.1 (Chapter 800.1) Medium relevance
Fresno County Zoning Code (Chapter 819.2) Medium relevance
Fresno County Zoning Code (Article 7) Medium relevance
Fresno County Zoning Code (Section 804.1.020) Medium relevance
Fresno County Zoning Code (Chapter 860.5) Medium relevance

Cited sections

Official Fresno County code library

Frequently asked questions

What is the HP Overlay in Fresno County and how does it get applied?

The HP Overlay is the County’s Historic Preservation overlay for inventoried properties; an owner whose parcel is on the County’s resource inventory may apply for an Amendment (Rezone) to place the HP overlay on the parcel. § 818.2.090.A

If my house is in the HP overlay, can I demolish or replace it?

Demolition, alteration, or additions to structures in the HP Overlay are subject to review by the Fresno County Historic Landmarks and Records Advisory Commission and require a Certificate of Appropriateness; only emergency health/safety work is excepted without Commission authorization. § 818.2.090.A.2–4

Who issues the Certificate of Appropriateness and can I appeal?

The Commission issues the Certificate of Appropriateness; approvals and conditional approvals by the Commission are final, but a denial is appealable to the Board of Supervisors. § 818.2.090.B

Does the HP overlay change the base zone’s setbacks, heights, or permitted uses?

No — except for the overlay’s review/approval requirements, the base-zone provisions continue to apply. You must follow the underlying zone’s development standards (setbacks, coverage, heights) as listed in the applicable zone chapters. § 818.2.090.A.5

Will I still need County Site Plan Review or building permits for work in a historic district?

Yes. Construction activities (additions, exterior alterations) generally require Site Plan Review under Chapter § 854.5, and applicable building permits under the California Building Standards Code. § 854.5

Do ADUs in a Fresno County historic district need additional parking?

An ADU located within a historic district qualifies for the County’s listed parking exception — additional ADU parking is not required in that case. See § 834.4.030(e)(3)(ii) and consult ADU standards before designing. § 834.4.030(e)(3)(ii)

Is the HP overlay automatically applied to older neighborhoods?

No. The overlay is placed only by application (owner-initiated Amendment / Rezone) for properties that are listed in the Commission’s resource inventory. § 818.2.090.A

What findings must the Commission make to approve proposed work?

The Commission must find the proposed work will not adversely affect significant architectural features/character, is CEQA-consistent, is consistent with applicable Zoning provisions or that inconsistencies are addressed, and is consistent with General Plan policies. § 818.2.090.C

If the Commission denies my request, what next?

A denial of a Certificate of Appropriateness may be appealed to the Board of Supervisors where the Board will review the Commission’s action. § 818.2.090.B

Where do I find the base-zone rules (permitted uses, setbacks) that still apply?

Check the specific zone chapters referenced in the Zoning Ordinance (e.g., § 810.2 for residential, § 812.2 for commercial, § 808.2 for agricultural) and Table 2‑1 (Zones Established) in § 806.2.010. § 806.2.010; § 810.2; § 812.2; § 808.2 ---

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