Local zoning · Westminster

Westminster — Historic Preservation

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

Last reviewed: July 3, 2026

Overview

Westminster's Zoning Code (Title 17) does not establish a standalone "historic preservation ordinance" but it embeds historic-preservation controls across land‑use review and nonconforming-structure rules. Key triggers are the Development Review and Design Review processes (which explicitly call out the demolition or redevelopment of historic structures) and a Planning Commission certification process that affects rebuilding after substantial destruction. See the code provisions on Development Review, Design Review, and Nonconforming Structures for the operative rules. § references below cite the Westminster Zoning Code text.

This page interprets what the Westminster Zoning Code requires (and what it does not say) about historic buildings, demolition, and related review. It links to related local topics like zoning, land use, development standards, and design review so applicants can follow the procedural path the City expects. Westminster Zoning Westminster Land Use Westminster Development Standards Westminster Design Review

How the ordinance treats "historic" resources — the operational rules

Demolition or redevelopment of a historic structure is an explicit Development Review trigger: Demolition of historic structures requires Development Review under § 17.520.010(A)(6). That means an application and the full Development Review process apply (with applicable noticing, environmental review, and findings).
The Design Review Board has a specific role for historic structures: demolition of historic structures, redevelopment of historic structures, and exterior changes to larger buildings are matters for the Design Review Board to review or make recommendations about under § 17.600.020. In practice, projects involving historic resources will be routed to design review.
The Planning Commission can certify a residential structure as "historically significant" for the narrow purpose of rebuilding after major destruction; if so certified before damage, the structure can be rebuilt to its original configuration even where other nonconforming rules would otherwise limit rebuilding (see § 17.610.025(C)(2)(c)). This is a case-specific certification, not a general registry.
The Community Development Director has discretion to require public noticing or to refer Development Review applications to the Planning Commission based on possible historic significance or other impacts; this discretion is spelled out in the public hearings/administrative review provisions (§ 17.630.010) and in the Development Review chapter. Expect referral/notice if a project could affect an apparent historic resource.
State-lists and SB‑9: Westminster's SB‑9 ministerial two‑unit path is explicitly restricted where a parcel "is located within a historic district or property included on the State Historic Resources Inventory" or "designated or listed as a City landmark or historic property or district pursuant to a City ordinance" — see § 17.400.122(B)(4). That is, parcels already designated as historic by state or local ordinance are excluded from SB‑9 ministerial eligibility.
Signage and historic-site placards: the code restricts what may be displayed for historic sites (notes to the sign tables indicate only building name, date of construction, or historical data may be displayed on historic sites and suggest material/installation standards); see the sign provisions and notes (referenced in the sign table notes). Verify precise sign rules in the sign chapter.
CEQA remains applicable: Development Review and design review matters that are not CEQA‑exempt will require environmental review (the Development Review chapter references CEQA and the Environmental Assessment procedures). Expect CEQA screening when historic resources might be affected. § 17.520.005; § 17.500.030.

Practical note: Westminster treats "historic issues" as process‑triggers (referral, Development Review, design review, possible Commission hearings and CEQA) rather than generating a citywide inventory or comprehensive preservation standards inside Title 17. Where Title 17 refers to historic status it relies on either evidence presented to the Commission, an outside recommendation (e.g., Westminster Historical Society), or state inventories.

District-by-district breakdown (what to know about preservation risk by zone)

The Zoning Code creates many primary districts. The code does not apply a citywide "historic overlay" in the parts of Title 17 retrieved here; instead, historic issues are processed through general review rules listed below. The districts most likely to be relevant for residential historic properties are the residential zones; downtown/commercial corridors and certain overlay districts bring additional procedural controls.

R1 — Single‑Family Residential
- Purpose: single‑family detached homes; implements low‑density General Plan designations.
- Typical permitted uses: single‑family dwelling (permitted subject to Zoning Clearance), accessory uses including ADUs subject to ADU rules. See Westminster ADUs for ADU interplay with historic resources.
- Key dimensional standards: minimum lot size 6,500 sf (corner) / 6,000 sf (other); maximum height 2 stories / 35 ft. See Table 2‑3 / § 17.210.015.
- Where historic controls apply: Demolition of a historic house in R‑1 triggers Development Review per § 17.520.010(A)(6) and may also require Design Review. Verify whether the parcel sits in any overlay or specific plan that adds requirements.
R2 / R3 / R4 / R5 — Multi‑family Residential (medium → high density)
- Purpose and density bands: R2 (8–12 du/ac), R3 (13–14 du/ac), R4 (15–18 du/ac), R5 (19–25 du/ac). Table 2‑1 / § 17.200.010.
- Typical permitted uses: multi‑family dwellings; accessory uses per Article 4. See the zoning use tables for permitted/AUP/CUP distinctions.
- Key dimensional / density standards: maximum densities are listed in Table 2‑3 (see R‑district columns for units/lot formulas). Table 2‑3 / § 17.210.015.
- Where historic controls apply: demolition or major exterior work on an identified historic multi‑family property is subject to Development Review and may be referred to the Design Review Board; redevelopment of historic structures also triggers specialized review in the Design Review Board duties.
MU36 / MU40 — Mixed‑Use districts with mandatory review
- Purpose: mixed‑use districts intended for combined commercial/residential development; the Code requires that all development in MU36 and MU40 obtain Development Review (§ 17.520.010(A)(9)). This makes historic/resource review de facto mandatory for any project in these districts.
PD — Planned Development Overlay
- Purpose: project‑specific standards for large or integrated developments; PD acts as an overlay that establishes its own development standards (see § 17.250.030). Historic preservation obligations in a PD depend on the approved Comprehensive Plan and PD conditions.
Other overlays (e.g., Little Saigon, Civic Center)
- Purpose: overlays add site‑specific rules. Overlays can add design standards or additional review routes; check the applicable overlay map and overlay chapter before assuming the standard review path. Westminster Overlay Districts

Note: The code’s zoning tables (Tables 2‑2, 2‑4, 2‑6) enumerate permitted uses by district. If a use or action (like demolition) affects a building that the City or a recognized body identifies as historic, the project will be pulled into the discretionary review tracks identified above.

Decision‑relevant standards & triggers (quick reference table)

Decision question	Relevant code requirement	Code Reference
Does demolition of a historic structure need development review?	Yes — Demolition of historic structures is listed as a Development Review trigger.	§ 17.520.010(A)(6)
Is design review involved for historic structure demolition or redevelopment?	Yes — Design Review Board duties include demolition and redevelopment of historic structures.	§ 17.600.020
Can a substantially destroyed historic house be rebuilt to original form?	Possibly — Planning Commission may have previously certified a residential structure as "historically significant," allowing rebuild to the original configuration after major destruction.	§ 17.610.025(C)(2)(c)
Will the City require public hearing/notice for projects affecting historic resources?	Director may require noticing or defer to Commission for Development Review based on historic significance (and other impacts).	§ 17.630.010; § 17.520.010(B)
Is SB‑9 ministerial two‑unit approval allowed on historic‑designated parcels?	No — SB‑9 two‑unit ministerial path excludes parcels in historic districts or those listed on State/local historic inventories.	§ 17.400.122(B)(4)

Checklist — what an applicant must satisfy for projects affecting a historic resource

Confirm whether the property is listed, designated, or has an official determination of historic significance (verify City records and State Historic Resources Inventory). (Verify with the jurisdiction.) Not a Title 17 automatic registry.
Prepare a Development Review application if the project includes demolition of a historic structure or otherwise meets Development Review triggers. § 17.520.010(A)(6).
Be ready for Design Review (Design Review Board review/recommendation) for demolition, redevelopment, or exterior alterations to historic structures. § 17.600.020.
Provide historic documentation or a professional historic assessment if claiming historic significance (the Commission may rely on evidence or a Westminster Historical Society recommendation for certification). § 17.610.025(C)(2)(c).
Anticipate CEQA screening and environmental analysis when historic resources may be affected; submit environmental materials as required in the Environmental Assessment procedures. § 17.500.030.
If pursuing SB‑9 or other ministerial ministerial housing exemptions, confirm the parcel is not located in a historic district or listed as a historic resource. § 17.400.122(B)(4).
If sign or plaque work is proposed for a historic site, check the signage chapter for allowed content/materials. (See sign-table notes.)

Practical tip: early pre‑application meetings with Community Development are advised so the Director can indicate likely referral to Commission and required submittals. The Director’s interpretation/decision may be appealed. § 17.120.015; § 17.630.010.

Risks & Ambiguities

Issue	Why it matters	What to verify
Historic designation status (Is the property "historic" to the City?)	Triggers discretionary review, possible CEQA issues, and can block ministerial pathways (e.g., SB‑9).	Verify whether the City or Planning Commission has formally designated the property or it is on the State inventory. (Verify with the jurisdiction.) Not found in retrieved materials for a citywide list.
What qualifies as "historically significant" in practice	The code allows Commission certification based on evidence or a recommendation, but the ordinance does not list objective thresholds.	Obtain City guidance on evidentiary standards; request an official interpretation if unclear. See § 17.610.025(C)(2)(c) and § 17.120.015.
SB‑9 exclusion applicability	SB‑9 ministerial relief is barred for properties in historic districts/listed resources; misclassification risks denial after submittal.	Confirm historic district boundaries and State/local inventory status before relying on SB‑9 ministerial path. § 17.400.122(B)(4).
Signage/interpretive plaque content	Sign rules include a special note for historic sites but the exact sign code cross‑references must be read.	Check sign chapter sections referenced in Table notes for exact limitations and permit requirements.
Rebuilding after disaster	Only pre‑certified historically significant residential structures receive special rebuild treatment under nonconforming rules; otherwise normal rules apply.	If rebuilding after damage, verify whether a prior Commission certification exists; otherwise standard nonconforming/destruction rules apply. § 17.610.025.

Plain‑English Summary

If your Westminster building is considered historic (by the City, the Planning Commission, or state listings), expect discretionary review: demolition or major work will typically require Development Review and likely Design Review, CEQA screening may apply, and some ministerial housing shortcuts (like SB‑9) won't be available; the Planning Commission can grant a narrow pre‑damage "historically significant" certification that affects rebuilding after destruction. Verify designation status early with the City.

Source References

Westminster Zoning Code (Title 17), Development Review applicability: § 17.520.010.
Westminster Zoning Code, Development Review purpose & procedures: § 17.520.005.
Westminster Zoning Code, Design Review Board duties (historic-demolition/design review): § 17.600.020.
Westminster Zoning Code, Nonconforming destruction / historically significant rebuild: § 17.610.025.
Westminster Zoning Code, Public hearings and Director discretion (notice/referral for historic significance): § 17.630.010.
Westminster Zoning Code, Zoning district table (R1–R5): § 17.200.010 / Table 2‑1.
Westminster Zoning Code, Residential district development standards (Table 2‑3): § 17.210.015 (R1 lot sizes, heights, densities).
Westminster Zoning Code, PD Overlay: § 17.250.030.
Westminster Zoning Code, SB‑9 two‑unit ministerial exclusions (historic districts): § 17.400.122(B)(4).
Westminster Zoning Code, Sign notes referencing historic site sign content: Sign Table notes (see Article 7 cross‑references).
Environmental assessment procedures for applications (CEQA screening): § 17.500.030.

If you want, I can request the City’s historic property list, Design Guidelines, or the specific sign‑chapter cross references to assemble a parcel‑specific checklist; otherwise, verify all items with City staff because some historic determinations are made case‑by‑case. Verify with the jurisdiction.

Sources

Retrieved passages

Westminster Zoning Code (§ 2) High relevance
Westminster Zoning Code (Chapter 17.520.) High relevance
CBC § 2 (§ 2) Medium relevance
Westminster Zoning Code (§ 2) Medium relevance
Westminster Zoning Code (§ 2) Medium relevance
Westminster Zoning Code (§ 2) Medium relevance
Westminster Zoning Code (Title 17.) Medium relevance
Westminster Zoning Code (§ 2) Medium relevance

Cited sections

Official Westminster code library

Frequently asked questions

What happens if I propose to demolish a house I think is historic in Westminster?

Demolition of a historic structure is an express Development Review trigger in Westminster; your demolition application will go through Development Review and likely to Design Review (Design Review Board involvement) and may require public notice and CEQA screening. See § 17.520.010(A)(6) and § 17.600.020.

Can I rebuild a house that was mostly destroyed (fire, earthquake) to its original historic design?

If the Home was previously certified by the Planning Commission as "historically significant" before the damage, the code allows rebuilding to the original configuration; absent that prior certification, standard nonconforming/destruction rules apply. See § 17.610.025(C)(2)(c). Verify with the jurisdiction (whether such certification exists).

Do I need Design Review for alterations to a historic commercial building?

Yes—Title 17 lists demolition or redevelopment of historic structures and exterior architectural modifications among the Design Review Board’s duties; projects affecting historic commercial buildings are likely subject to Design Review. See § 17.600.020.

Is a property in a Westminster historic district eligible for SB‑9 two‑unit ministerial permitting?

No. Westminster’s SB‑9 ministerial two‑unit provisions explicitly exclude parcels located in a historic district or listed on the State Historic Resources Inventory or designated as a City landmark/historic property. § 17.400.122(B)(4).

Who decides whether a building is "historically significant" for code purposes?

The Planning Commission has authority to certify a residential structure as historically significant (for rebuild after destruction) based on evidence presented or a recommendation (for example, from the Westminster Historical Society). The Code also allows the Director/Commission to interpret and make determinations under § 17.120.015 and § 17.610.025.

Will an application that affects a historic resource automatically require a public hearing?

Not automatically — but the Director has discretion to require noticing and defer Development Review applications to the Commission when historic significance is a potential impact; projects not CEQA‑exempt will be noticed/heard. See § 17.630.010 and § 17.520.010(B).

Where do setback, parking, and other objective standards fit when a building is historic?

Historic issues trigger discretionary review, but underlying objective standards (setbacks, parking, heights) still apply as codified elsewhere in Title 17. You should evaluate parking and dimensional compliance concurrently with your Development Review submittal; see Westminster Parking and Westminster Development Standards.

If a property is listed on the State Historic Resources Inventory, does Westminster treat it differently?

Yes—listings on the State Historic Resources Inventory are specifically cited as a basis to exclude parcels from SB‑9 and to trigger discretionary considerations; any State listing is a factor the City will treat as a historic resource for review triggers. § 17.400.122(B)(4).

Can I put a historic plaque or sign on my building, and do historic signs have special rules?

Sign content for historic sites is limited by the sign chapter notes (the notes indicate only building name, date of construction or historical data may be used and refer to material standards). Check the sign provisions referenced in the code (Article 7 cross‑references) for exact permit requirements.

Where do I start if I want to convert a historic property to a multi‑unit property?

Start with a pre‑application meeting with Community Development; conversion that alters a historic property will likely require Development Review, Design Review, and CEQA screening. Confirm whether the site sits in an overlay or is on any historic registry—the Director may require Commission review. § 17.520.010; § 17.600.020; § 17.630.010.

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