Westlake Village — Historic Preservation

Last reviewed: July 3, 2026

Overview

Westlake Village does not have a stand‑alone historic‑preservation chapter in its zoning ordinance. Historic and cultural resources are protected indirectly through several existing rules that affect design review, hillside development, heritage trees, planned development review, nonconforming‑building rules, and public/institutional uses (museums). Key controls for projects that might affect historic resources are design review, planned development permits, the Hillside Development Standards, and the Oak/Heritage Tree rules. Where the code is silent on a local landmark/district process, verify with the City; the text below cites the controlling local sections and explains how they operate in practice. For the City’s zoning overview see Westlake Village Zoning & Planning Overview.

What the ordinance says (top‑level rules)

• Design review is required for any permit or zoning clearance that authorizes new construction or exterior modifications; see § 9.15.010 for purpose and applicability.
• Planned Development Permits (PDPs) are the main discretionary vehicle the City uses to review major projects in the R‑1, RPD, MHP, CPD, CR, BP, OS, and PI zones; see § 9.25.020 for where PDPs are required.
• Hillside Development Standards expressly require maintaining “important historic or cultural man‑made features” where feasible; see § 9.17.030(2).
• Oak tree / Heritage tree protections identify trees as historical/aesthetic resources and impose preservation procedures; see § 9.21.010 and the Oak Tree standards.
• There is a nonconforming buildings/uses program (limits on restoration, replacement and modification) that controls what can be done to older structures; see § 9.22.010–§ 9.22.020.
• The PI (Public/Institutional) zone specifically allows publicly owned museums and libraries, providing a clear route for cultural uses; see § 9.12.020(1).

Practical links you’ll hit while pursuing a preservation project:

• If your work touches exterior design, expect city design review under the Design Standards (link to Westlake Village Design Review).
• If your building is older or large, expect discretionary PDP rules under planned development (link to Westlake Village Zoning).
• Tree and landscape issues are handled via the Oak/Heritage Tree chapter and the Westlake North Specific Plan tree requirements (link to Westlake Village Landscaping and Screening).
• If you plan to add an ADU, follow the ADU rules (link to Westlake Village ADUs) and ministerial ADU procedures that may limit discretionary review.
• Building work must still meet the California Building Standards Code (link to California Building Standards Code) even where historic exceptions apply.

(First natural mention of each of the linked topics above includes the internal link: Westlake Village Design Review, Westlake Village Zoning, Westlake Village Landscaping and Screening, Westlake Village ADUs, California Building Standards Code.)

District‑by‑district breakdown — how the code interacts with historic preservation

Note: the entries below summarize where historic‑resource concerns appear in each zone’s rules. For code language, each line cites the controlling ordinance § and the file search result.

R‑1 (Single‑Family Residential)

• Purpose: preserve single‑family character and neighborhood scale — § 9.1.020 and R‑1 development standards in § 9.14.020 (A).
• Typical permitted uses: single‑family dwellings and accessory uses; ADUs are allowed under the ADU rules in § 9.14.070.
• Key dimensional standards relevant to preservation: maximum height 2 stories / 35 ft, front yard 20 ft, minimum lot area 8,000 sq ft, minimum lot width 65 ft (development standards) — see § 9.14.020 (A).
• Where it applies: citywide single‑family neighborhoods as mapped on the Official Zoning Map — § 9.3.010.
• Practical effect for historic buildings: exterior changes to older single‑family homes still trigger design review where a zoning clearance or permit authorizes exterior modification (§ 9.15.020).

RPD (Residential Planned Development)

• Purpose: flexible planned residential development reviewed by PDP to protect neighborhood character — § 9.6.010.
• Typical permitted uses: single‑family, multifamily, apartments (permitted with a PDP) — § 9.6.020.
• Key standards: height 2 stories / 35 ft (same basic yard rules as R‑1 unless modified by PDP), multifamily yards 20 ft from public right‑of‑way — § 9.6.020 and § 9.14.020 (B).
• Where it applies: planned residential developments, including areas covered by Westlake North Specific Plan (see Planning Areas) — § 9.6.010 and specific plan chapters.
• Practical effect: PDP review is the primary avenue for discretionary design guidance and conditions (including preservation‑minded conditions) — see PDP findings § 9.25.080.

CPD (Commercial Planned Development), CR (Commercial Recreation), BP (Business Park)

• Purpose & uses: each zone establishes the commercial or business use spectrum; CR allows recreation and country clubs; CPD/BP allow retail, offices, business park uses — see respective Chapter summaries and permitted use lists (e.g., § 9.9.020 for CR and § 9.14.020 (C–F) for development standards).
• Key dimensional standards: generally 2 stories / 35 ft, maximum lot coverage 35%, minimum street setback 20 ft and landscaped side setbacks 10 ft — § 9.14.020 (C–F).
• Where it applies: commercial corridors, business park areas and Westlake North Specific Plan areas (see Planning Area tables).
• Practical effect: commercial and park properties with historic elements will be subject to PDP/design review and the Specific Plan design criteria; parking and screening rules often drive preservation‑friendly buffering (see Westlake Village Parking and Specific Plan chapters).

PI (Public/Institutional)

• Purpose & uses: explicitly allows publicly owned museums and libraries, civic uses — § 9.12.010–§ 9.12.020.
• Practical effect: adaptive reuse of public/historic buildings for museums, cultural centers or public programs has a direct, permitted home in PI (subject to PDP/design review).

OS (Open Space)

• Purpose: protect and preserve natural resources and open space; use rules emphasize passive recreation and protective buffers — § 9.13.010–§ 9.13.020.
• Practical effect: archaeological, cultural landscapes or historic open‑land resources are most often managed via OS requirements, the Specific Plan and the Hillside standards § 9.17.

(Official list of zoning districts is established in § 9.3.010.)

Key standards & permitted uses (decision‑relevant table)

Checklist — what an applicant must satisfy when a project affects historic resources

• Confirm zoning of the parcel and whether the property is in an OS, PI, R‑1, RPD, CPD, CR, or BP zone (§ 9.3.010).
• Determine whether the proposal triggers a Planned Development Permit (new structure or significant exterior alteration) per § 9.25.020; if so, prepare PDP package and findings § 9.25.080.
• Prepare design documentation to meet Design Standards and be ready for design review (§ 9.15.010 and § 9.15.020). Link to Westlake Village Design Review.
• Check Hillside Development applicability; if in Hillside Management Area, provide analysis preserving historic/cultural features (§ 9.17.020–030).
• If heritage or oak trees are on site, include an Oak/Heritage Tree Plan prepared by a qualified arborist and comply with tree protection measures (§ 9.21.010 and Oak Tree Plan).
• Confirm nonconforming building status; if the building is nonconforming, determine restoration limits under § 9.22.020 before planning demolition or major repair.
• Prepare public notice / hearing materials and be ready for the required noticing procedures in § 9.32.030 and hearing rules § 9.32.040.
• Coordinate parking, setbacks and landscape requirements tied to the district (see Westlake Village Parking and Westlake Village Development Standards) — parking and setback standards may constrain preservation options.

Risks & Ambiguities

Plain‑English summary

Westlake Village does not have a stand‑alone historic‑preservation ordinance; instead, protection of historic buildings, landscapes and trees happens through the City’s design review, planned‑development permit process, the Hillside Development Standards (for hillside historic features), and the Oak/Heritage Tree chapter. That means preservation outcomes are achieved by negotiating conditions during discretionary review rather than by a local “landmark” listing procedure. Always verify whether a parcel is in a Hillside Management Area, has heritage trees, or is within a Specific Plan area before planning major work.

Source References

• Westlake Village Zoning Ordinance (Article 9, Title/General Provisions) — § 9.1.020 (purpose) and district list § 9.3.010.
• Design standards and applicability — § 9.15.010 / § 9.15.020.
• Development standards (R‑1, RPD, CPD, CR, BP, PI, OS) — § 9.14.020 (development standards table and R‑1 specifics).
• RPD zone purpose and permitted uses — § 9.6.010 / § 9.6.020.
• Planned Development Permit applicability and findings — § 9.25.020 and § 9.25.080.
• Hillside Development Standards (historic/cultural features) — § 9.17.010 / § 9.17.030(2).
• Oak Tree and Heritage Tree Preservation — § 9.21.010 and Oak Tree standards.
• Nonconforming buildings & uses — § 9.22.010–§ 9.22.020.
• PI zone permitted uses (museums, libraries) — § 9.12.020(1).
• Notice and hearing procedures — § 9.32.030–§ 9.32.050.

(For the City’s program pages referenced in the text: Westlake Village Zoning & Planning Overview, Westlake Village Zoning, Westlake Village Development Standards, Westlake Village Design Review, Westlake Village Parking, Westlake Village Landscaping and Screening, Westlake Village ADUs, California Building Standards Code.)

Retrieved passages

• Westlake Village Zoning Code (Section 65355.) Medium relevance show source text
• Westlake Village Zoning Code (Chapter 9.35) Medium relevance show source text
• Westlake Village Zoning Code (§ 2) Medium relevance show source text
• Westlake Village Zoning Code (CHAPTER 9.21.) Medium relevance show source text
• CBC § 040 (Article except) Medium relevance show source text
• Westlake Village Zoning Code (Section upon) Medium relevance show source text
• Westlake Village Zoning Code (CHAPTER 9.25.) Medium relevance show source text
• Westlake Village Zoning Code (CHAPTER 9.21.) Medium relevance show source text
• Westlake Village Zoning Code (Section shall) Medium relevance show source text
• Westlake Village Zoning Code (Section 65454) Medium relevance show source text
• Westlake Village Zoning Code (Section governing) Medium relevance show source text
• CBC § 468 (CHAPTER 9.25.) Medium relevance show source text
• Westlake Village Zoning Code Medium relevance show source text
• Westlake Village Zoning Code (Chapter 9.25) Medium relevance show source text
• Westlake Village Zoning Code (Section 9.06.100) Medium relevance show source text
• Westlake Village Zoning Code (Chapter 9.15.) Medium relevance show source text
• Westlake Village Zoning Code (Section 9.25) Medium relevance show source text
• Westlake Village Zoning Code (CHAPTER 9.14.) Medium relevance show source text
• Westlake Village Zoning Code (Section is) Medium relevance show source text

Cited sections

• Westlake Village Zoning Ordinance (Article 9, Title/General Provisions) — **§ 9.1.020** (purpose) and district list **§ 9.3.010**. (Article 9)
• Design standards and applicability — **§ 9.15.010** / **§ 9.15.020**. (§ 9.15.010)
• Development standards (R‑1, RPD, CPD, CR, BP, PI, OS) — **§ 9.14.020** (development standards table and R‑1 specifics). (§ 9.14.020)
• RPD zone purpose and permitted uses — **§ 9.6.010** / **§ 9.6.020**. (§ 9.6.010)
• Planned Development Permit applicability and findings — **§ 9.25.020** and **§ 9.25.080**. (§ 9.25.020)
• Hillside Development Standards (historic/cultural features) — **§ 9.17.010** / **§ 9.17.030(2)**. (§ 9.17.010)
• Oak Tree and Heritage Tree Preservation — **§ 9.21.010** and Oak Tree standards. (§ 9.21.010)
• Nonconforming buildings & uses — **§ 9.22.010**–**§ 9.22.020**. (§ 9.22.010)
• PI zone permitted uses (museums, libraries) — **§ 9.12.020(1)**. (§ 9.12.020)
• Notice and hearing procedures — **§ 9.32.030**–**§ 9.32.050**. (§ 9.32.030)
• WestlakeVillage_ZoningCode.md

• Official Westlake Village code library