Local zoning · Pleasant Hill

Pleasant Hill — Historic Preservation

Q: If my lot is zoned **R-10-H**, which rules control: R-10 or the overlay?

Both apply. The base R-10 development standards (setbacks, height, lot coverage) remain in force, but the historic overlay’s conservation plan and requirements govern alterations affecting historic integrity; if there is a conflict the overlay plan controls ( § 18.40.020 E ). See residential standards in § 18.15.030 .

Q: Are incentives available if I put my property under historic conservation?

Pleasant Hill endorses financial incentives such as the Mills Act and encourages investigation of federal, state and private funding sources; the overlay section references Mills Act support ( § 18.40.020 E.5 ).

Historic Preservation under the Pleasant Hill local zoning and planning code, with the controlling citations.

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Last reviewed: July 2, 2026

Overview

Pleasant Hill’s Zoning Ordinance establishes two overlay tools for local preservation: the Historic Overlay (H) and the Cultural Resource Overlay (CR). These overlays are applied on top of any base zoning district and add a preservation review layer (including Certificate of Appropriateness and demolition review) administered primarily by the Architectural Review Commission and implemented through the Planning Commission and City Council as described in § 18.40.020.

The city keeps a local register, uses a historic district conservation plan when an “H” district is adopted, and relies on state and federal guidance (for example, the Secretary of the Interior’s Standards) and the State Historical Building Code for designated resources. § 18.40.020 describes purpose, procedures, required findings, and exemptions.

How the H / CR overlays work (quick)

An overlay is shown on the Zoning Map by adding -H or -CR to the base district (for example R-10-H or NB-CR) — § 18.40.020 C.
A Certificate of Appropriateness is required before development, exterior alteration, restoration, relocation, or demolition affecting appearance/cohesiveness unless an exemption applies — § 18.40.020 K.
The Architectural Review Commission leads review and recommendation; Planning Commission and City Council take specified actions for map amendments and major approvals — § 18.40.020 B, F.

District-by-district breakdown

Pleasant Hill’s preservation overlays are designed to be combined with any of the base zoning districts listed in Title 18. Below are the common base districts (actual district symbols used in the Code are bolded) with the preservation-relevant summary (purpose, typical uses, key dimensional points from the ordinance, and where the overlay would apply). For each district the practical effect is: the base district’s uses and dimensional standards continue to apply unless the H/CR ordinance or the district’s conservation plan modifies them; where there is a conflict the historic overlay controls (see § 18.40.020 E).

R-20, R-15, R-10, R-10A, R-7, R-6 (Residential districts)

Purpose / typical permitted uses: single-family and multifamily residential depending on the code classification; accessory uses such as Accessory Dwelling Units (ADUs) are regulated under § 18.15.050. See the residential use table for exact allowances. § 18.15.020–.030.
Key dimensional standards (decision-relevant examples drawn from Table 18.15-B): front setback 20 ft (typical for R-10), side setback 5 ft, rear setback 15 ft, building height 35 ft, lot coverage ranges (e.g., 30%–35% depending on specific residential district). These numbers are set in § 18.15.030 (Table 18.15-B). Bolded numeric values above reflect the ordinance table.
Where it applies: an -H or -CR can be added to any of these districts (example: R-10-H) and would require review of exterior changes through a Certificate of Appropriateness where applicable — § 18.40.020 B.2 & K.

Relevant links (first natural mention): see the city’s pages for Pleasant Hill ADUs and for base district standards in Pleasant Hill Development Standards.

NB (Neighborhood Business), RB (Retail Business), PAO (Professional & Administrative Office), C (General Commercial), LI (Limited Industrial)

Purpose / typical permitted uses: retail, neighborhood-serving commercial, offices, light industrial uses as mapped in Table 18.25-B and the land-use tables. § 18.25.030–.040.
Key dimensional standards (Table 18.25-B examples): front setbacks commonly 25 ft for NB/RB, building height 35 ft, and gross floor area / FAR for commercial uses typically 0.35–0.40 depending on district; minimum site landscaping standards also apply. See § 18.25.030 and Table 18.25-B for specifics.
Where it applies: overlay designators -H or -CR may be combined with these commercial districts; when they are, any exterior work requires the Certificate of Appropriateness and demolition requires Architectural Review Commission approval per § 18.40.020.

If your project triggers parking or change-of-use questions, check Pleasant Hill Parking as parking standards still apply to projects in historic overlays.

PUD / PPD and HPUD (Planned Unit / Hillside Planned Unit Development)

Purpose / typical permitted uses: site-specific master plans or hillside-specific development; HPUD applies where slope and hillside conditions require special regulation — § 18.30 and § 18.35.
Key standards: HPUD and PUD plans set site-specific development standards; architectural and development plans must be consistent with the approved HPUD plan and are subject to Architectural Review — § 18.35.080.
Where it applies: historical overlays can be combined with PUD/HPUD; in case of conflict the overlay’s conservation plan governs (see § 18.40.020 E).

OS (Open Space) and REC (Parks and Recreation)

Purpose / typical permitted uses: conservation, recreation and limited public uses — § 18.50 and related chapters.
Key standards: OS and REC typically do not have density limits; development standards are established by the Zoning Administrator consistent with OS purpose; preservation overlays may be applied where cultural/archaeological resources exist — § 18.50.030 and § 18.40.020.

Practical bottom line for district applicability

A historic or cultural overlay is an add-on; it does not automatically change use tables (the base district still controls permitted uses) but imposes review and standards for exterior changes, demolition, maintenance, and conservation plans — see § 18.40.020 E & K.

For the City’s description of overlay types, see Pleasant Hill Overlay Districts and for design review steps see Pleasant Hill Design Review.

Decision‑relevant standards (quick-reference table)

Rule / Action	What the code requires	Code reference
Certificate of Appropriateness required before exterior work that affects appearance/cohesiveness	Must be obtained before issuance of a Zoning or Building Permit unless exempt	§ 18.40.020 K.
ARC approval required for demolition of any structure in an H district or CR	Demolition requires Architectural Review Commission approval (see demolition review provisions)	§ 18.40.020 L (Demolition review)
How overlay is shown on map	Add -H or -CR to the base zoning symbol	§ 18.40.020 C
Waiver of base zone regs to preserve a resource	Planning Commission may grant Use Permit (with ARC recommendation) to waive base-zone land use regs to allow preservation/restoration	§ 18.40.020 I
State historical building code alternative	Work on designated cultural resources may be done under the California State Historical Building Code instead of Title 24	§ 18.40.020 E.3
Design guidance used by ARC	Secretary of the Interior’s Standards for Rehabilitation are used as guidelines	§ 18.40.020 E.4
Owner maintenance obligation	Property owners in H or CR districts must maintain structures in good repair; disrepair definitions provided	§ 18.40.020 J
Historic district adoption requires a conservation plan	An "H" district ordinance must include a historic district conservation plan (maps, inventories, standards for alterations, demolition, signs, landscaping, etc.)	§ 18.40.020 F.2.a–iv

Checklist — what an applicant must satisfy (practical)

Confirm whether the property is on the City’s local register or already designated as -H or -CR (the Architectural Review Commission keeps the local register). § 18.40.020 B.1.c.
If pursuing a new H district designation, prepare or obtain a proposed historic district conservation plan (inventory, maps, photos, guidelines) as required for the map amendment application. § 18.40.020 F.2.a–iv.
Submit a complete application for a Certificate of Appropriateness with required fee to the Zoning Administrator (only the property owner may apply). § 18.40.020 K.3–4.
For demolition work, prepare materials supporting the application since ARC approval is required; check the demolition/performance guidelines in any applicable conservation plan. § 18.40.020 L (Demolition review) and F.2.iv.
If a waiver of base-zone rules is necessary to preserve a resource, apply for a Use Permit and expect ARC and Planning Commission review and findings. § 18.40.020 I.
When preparing structural work on a designated resource, confirm whether the California State Historical Building Code applies instead of the California Building Standards Code (Title 24). § 18.40.020 E.3.

If you need to address signage for a historic commercial façade, consult Pleasant Hill Signage alongside the conservation plan.

Risks & Ambiguities

Issue	Why it matters	What to verify
Whether a parcel is already designated H or CR	Designation triggers Certificate of Appropriateness, demolition review, and maintenance obligations	Confirm the City’s local register and the Zoning Map; contact Planning/Zoning or ARC. § 18.40.020 B.1.c; C.
Whether an alteration is “ordinary maintenance” (exempt)	Ordinary maintenance is exempt, but the line between repair and alteration can be subtle	Ask the Zoning Administrator or ARC to confirm whether the work needs a Certificate of Appropriateness. § 18.40.020 E.1 & K.2.
Conflicts between overlay conservation plan and base district standards	Conservation plans can modify base zoning rules and will govern in conflicts	Review the adopted historic district conservation plan attached to the overlay ordinance; verify which standards control (overlay generally prevails). § 18.40.020 E & F.
Applicability of State Historical Building Code vs Title 24	Using alternative code provisions affects construction permits and plan check	Verify with Building Division and reference § 18.40.020 E.3; “Verify with the jurisdiction” for parcel-specific interpretations.
Whether an ADU is permitted without historic review delays	ADUs are allowed in historic contexts but certain objective standards can apply to avoid adverse impacts	Confirm local ADU standards and whether ARC review is required for appearance changes. See § 18.15.050 for ADUs and § 18.40.020 for overlay review. Verify with the Planning Division.

Plain-English Summary

If your Pleasant Hill property is marked with -H or -CR, you still follow the base zone rules (setbacks, height, parking, etc.), but any work that changes how the building looks on the outside or tears it down will usually need a Certificate of Appropriateness and Architectural Review Commission approval—expect to submit photos, drawings, and sometimes a conservation plan; the rules are in § 18.40.020.

Source References

Pleasant Hill Zoning Ordinance, Chapter 18 — Historic Districts and Cultural Resources (full text and requirements), § 18.40.010–.020.
Certificate of Appropriateness procedures and exemptions, § 18.40.020 K.
Historic district conservation plan requirements and adoption procedure, § 18.40.020 F.2.a–iv.
Waiver of base-zone land use regulations (Use Permit for preservation), § 18.40.020 I.
Maintenance obligations and standards for disrepair, § 18.40.020 J.
State Historical Building Code and Secretary of the Interior standards references in overlay section, § 18.40.020 E.3–5.
Development Standards — Residential districts (Table 18.15‑B), § 18.15.030.
Development Standards — Commercial / Office / Industrial (Table 18.25‑B), § 18.25.030–.040.
Zoning district table showing district symbols including H and CR, Table 18.05‑A and related, § 18.05.050.

Sources

Retrieved passages

Pleasant Hill Zoning Code (Chapter 18.180) High relevance
Pleasant Hill Zoning Code (§ 18.40.020) High relevance
Pleasant Hill Zoning Code (Chapter 18.180) High relevance
Pleasant Hill Zoning Code (§ 18.40.020) High relevance
CBC § 18.40.020 (Section and) High relevance
Pleasant Hill Zoning Code (Chapter 18.180) High relevance
Pleasant Hill Zoning Code (Chapter 18.180) High relevance
Pleasant Hill Zoning Code (§ 18.40.020) High relevance
Pleasant Hill Zoning Code (§ 18.35.090.) Medium relevance
Pleasant Hill Zoning Code (§ 18.15.180) Medium relevance
Pleasant Hill Zoning Code (§ 18.30.070.) Medium relevance
Pleasant Hill Zoning Code (Section is) Medium relevance
Pleasant Hill Zoning Code (§ 18.215.070) Medium relevance
Pleasant Hill Zoning Code (§ 18.35.040.) Medium relevance
Pleasant Hill Zoning Code (Chapter 18.70) Medium relevance

Cited sections

Official Pleasant Hill code library

Frequently asked questions

What does the **-H** overlay mean on my Pleasant Hill zoning map?

An -H overlay (Historic Overlay) means the property is within a locally designated historic district and exterior work, demolition, relocation, or restoration that would affect appearance/cohesiveness typically requires a Certificate of Appropriateness and Architectural Review Commission action under § 18.40.020.

Do I always need a Certificate of Appropriateness to paint or replace siding?

Not always. “Ordinary maintenance and repair” that does not change design, material, or external appearance is exempt; if the work alters historic materials, design, or appearance you will need a Certificate of Appropriateness — see § 18.40.020 E.1 and K.2.

Can the City require me to keep my building in a certain condition?

Yes — owners of properties in H or CR districts are obligated to maintain structures in good repair; the ordinance defines standards for “good repair” and “disrepair” and gives the ARC enforcement authority for harmful deterioration (§ 18.40.020 J).

If my lot is zoned **R-10-H**, which rules control: R-10 or the overlay?

Both apply. The base R-10 development standards (setbacks, height, lot coverage) remain in force, but the historic overlay’s conservation plan and requirements govern alterations affecting historic integrity; if there is a conflict the overlay plan controls (§ 18.40.020 E). See residential standards in § 18.15.030.

Can the Planning Commission waive base zoning rules for preservation work?

Yes — the Planning Commission may grant a Use Permit to waive base-zone land use regulations if the waiver is necessary to preserve or restore an historic or architecturally significant building, following ARC recommendation and the Use Permit procedures (§ 18.40.020 I).

Does the State Historical Building Code apply to my designated cultural resource?

Work on buildings designated as cultural resources can be done under the California State Historical Building Code rather than the standard California Building Standards Code (Title 24) when appropriate; confirm applicability with the Building Division and see § 18.40.020 E.3. (Verify with the jurisdiction for parcel-specific applicability.)

Are incentives available if I put my property under historic conservation?

Pleasant Hill endorses financial incentives such as the Mills Act and encourages investigation of federal, state and private funding sources; the overlay section references Mills Act support (§ 18.40.020 E.5).

Will a historic overlay stop me from building an ADU?

Not categorically. ADUs are permitted in residential districts, including properties in historic overlays, but the City may apply objective standards to avoid adverse impacts on historic resources. Check ADU rules and coordinate with ARC for any exterior appearance reviews (§ 18.15.050 and § 18.40.020).

Who maintains the list of local cultural resources and how can I find out if my building is listed?

The Architectural Review Commission maintains the local register of cultural resources, including survey results and records; contact the Planning Division or ARC to request register information under § 18.40.020 B.1.c.

If I want to form a new historic district, what must owners submit?

An application for an H district must include a historic district conservation plan with boundaries, photographs, an inventory of structures, significance statements, a list of alteration categories requiring review, and performance guidelines for demolition and new construction; if not City-initiated the application must include owner consent signatures per § 18.40.020 F.2.a–v.

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