Local zoning · Agoura Hills

Agoura Hills — Historic Preservation

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

Last reviewed: July 3, 2026

Overview

Agoura Hills' zoning ordinance embeds historic- and cultural-resource protections in several places: the Old Agoura (OA) Design Overlay District, nonconforming-structure rules, the city's cultural-resources standards (including tribal treatment), and a dedicated oak-tree/landmark-tree program. Expect design-review or conditional-use controls in overlay areas, special reconstruction rules for named Old Agoura landmarks, and trigger-based cultural-resource investigations for projects that involve ground disturbance. See the ordinance provisions for the controlling text: § 9551–9555, § 9708.3.C, § 9663.3, and § 9657 for the oak-tree rules.

When reading this page, note inline links to related local topics you will likely need: design review, overlay district rules, ADU rules, development standards, parking, nonconforming uses, and the California Building Standards Code.

design review: Agoura Hills Design Review
overlay rules: Agoura Hills Overlay Districts
ADU rules: Agoura Hills ADUs
development standards / setbacks: Agoura Hills Development Standards
parking: Agoura Hills Parking
nonconforming treatment: Agoura Hills Nonconforming Uses
state building code references: California Building Standards Code

District-by-district breakdown

Old Agoura Overlay District (OA)

Purpose: Preserve the unique, rural/equestrian character of Old Agoura and establish special public improvement and design guidelines. § 9551.
Typical permitted uses: Generally, “all uses permitted in the underlying district” are allowed, but Subarea 11 (Old Agoura Commercial Center Area) is limited to a list of small-scale community-serving commercial uses as enumerated in § 9552 / § 9552.1. § 9552–9552.1.
Key development/design standards: Maximum building height generally 35 ft / 2 stories in the OA special area (§ 9553.2); building coverage set by discretionary review but not to exceed 50% except in specific cases (§ 9553.1); signage and materials standards designed to perpetuate a rural character (§ 9553.5–9553.6). § 9553.1–9553.6.
Where it applies: The OA overlay is geographically described in § 9552 (Subarea 11 area south of the Ventura Freeway, west of Chesebro Road, etc.). § 9552.
Historic-specific rules inside OA: Certain Old Agoura structures are explicitly identified as historic/nonconforming and receive special reconstruction treatment (see below under Nonconforming uses). § 9552.2 (identified subarea and mapping).

Practical note: projects in the OA district are routinely subject to discretionary design review; expect to supply design elevations, materials palettes, and sign programs consistent with § 9553.

Nonconforming Historic Structures (Old Agoura examples)

Purpose / special allowance: The code lists specific Old Agoura features/structures that are treated as historic for nonconforming-structure rules — explicitly: "Amazing Kate's", "Old Post Office", "Stage Door Theatre", and the "Agoura Sign". For these, rehabilitation or reconstruction after damage may be permitted up to 100% of pre-damage size if restoration begins within 1 year and architectural design is approved by the Director. § 9708.3.C.
Where it applies: Old Agoura (map/list in § 9552.2). § 9552.2.

Practical note: If you own one of the named structures or an identified Old Agoura parcel, the city allows reconstruction to historic footprint under the director’s review; verify time limits and design review conditions in § 9708.3.

Citywide cultural- and archaeological-resource rules (applies to all districts)

What triggers the rules: Projects with ground disturbance or where a Phase I cultural resource report identifies significant resources must either preserve resources in situ or implement a data-recovery plan prepared by a qualified archaeologist. § (cultural resources — preservation / data recovery).
Tribal involvement: If Native American or tribal cultural resources exist, the applicant must enter a cultural resources treatment agreement with an affiliated tribe recognized by NAHC; the agreement must address monitoring, handling of artifacts/remains, compensation, and the tribe’s authority to stop/redirect grading to assess finds. § (tribal treatment agreement).
State/National Register protection: No historic resource eligible for listing on the California Register or the National Register shall be removed or altered in a way that causes loss of eligibility unless it is adequately documented and treated per the State/National Register procedures and the Secretary of the Interior standards. § (state/national register protection).

Practical note: these rules are typically enforced at the discretionary review/CEQA or entitlement stage; plan to budget for a Phase I and potential mitigation if you will disturb native soils.

Oak-tree / landmark-tree protections (historic landscape resources)

Permit requirement: No removal or encroachment into the protected zone of a protected oak tree (generally trees > 2" diameter at 3.5 ft) is allowed without an oak tree permit from Planning/PC. § 9657.1–9657.2.
Landmark trees and replacement standards: Landmark tree defined by size (diameter ≥ 48 inches); replacement planting schedules require large container stock for landmark removals and specific replacement ratios for healthy vs. hazardous trees. See the Oak Tree Preservation Guidelines / Appendix A. § 9657 and Appendix A.

Practical note: If your project affects mature oaks, an oak-tree report, consultant, and likely on-site mitigation/planting and monitoring will be required before occupancy clearance.

Applicability to specific zoning districts (RS, RL, RV, RM-15, CS-MU, PD)

Historic protections and cultural-resource triggers are cross-cutting and can apply regardless of the underlying zone. For example, special housing exemptions or standards explicitly exclude projects located within a historic district or on parcels listed on a historic inventory. See § 9293.2.F and related housing-project standards. § 9293.2–9293.3.
Planned Development (PD) parcels follow their specific plan/regulatory document; historic resource rules still apply where the property is listed or a resource is found. § 9496–9497 (PD purpose and permitted uses); verify PD-specific regs for historic treatments.

Practical note: Even on PD or RM-15 sites, cultural-resource reports, design review, and oak-tree rules may be required when triggered by the project scope or site conditions. Verify the PD or specific-plan text for added constraints. Verify with the jurisdiction.

Key decision-relevant standards (quick reference table)

Topic	Most-relevant rule/limit	Code Reference
Old Agoura overlay purpose and limited commercial list	Preserve Old Agoura character; Subarea 11 permitted uses enumerated	§ 9551–9552
OA max height (special area)	35 ft / 2 stories (except where another provision applies)	§ 9553.2
OA max building coverage (commercial lots)	Discretionary; generally not to exceed 50%	§ 9553.1
Nonconforming historic structures (Old Agoura)	Reconstruction up to 100% of pre-damage size if commenced within 1 year; director review for design	§ 9708.3.C
Cultural resources (archaeology)	Preserve in situ or implement data-recovery plan; tribal treatment agreement required if tribal resources found	§ (cultural resources preservation / tribal agreement)
Oak-tree permit trigger	No removal/encroachment into protected oak zone without permit; protected tree > 2 in DBH at 3.5 ft	§ 9657.1 / Appendix A
ADUs in historic areas	ADUs are allowed in historic districts but objective standards can be applied to avoid adverse impacts	ADU standards (see ADU rules) § (ADU provisions)

Checklist (what an applicant must satisfy for a project affecting historic resources)

Confirm whether the parcel lies in the Old Agoura Overlay (OA) or is listed on any local/state historic registry; consult the mapping in § 9552.2. Verify with the jurisdiction.
Provide required drawings/material samples for design review where OA or other overlay triggers apply; follow the OA design standards in § 9553–9555.
Submit a Phase I cultural resources (archaeological) report if ground-disturbing work is proposed; if significant resources are found, preserve in situ or submit a data-recovery plan per the ordinance. § (cultural resources preservation).
If tribal resources are present, execute a cultural resources treatment agreement with an NAHC-recognized affiliated tribe addressing monitors, treatment, and disposition. § (tribal treatment agreement).
If a protected oak tree is affected, obtain an oak tree permit and submit the oak-tree report and replacement/compensatory plan as required in § 9657 and Appendix A.
If your project involves repair/reconstruction of a named Old Agoura historic structure, comply with reconstruction timing (start within 1 year of damage) and director review per § 9708.3.C.
Provide parking solutions consistent with city [parking] standards and any OA modifications (parking can be approved off-site by discretionary review). Agoura Hills Parking
For ADUs on historic properties, follow local ADU provisions and any objective standards intended to prevent adverse impacts. § (ADU provisions).

Risks & Ambiguities

Issue	Why it matters	What to verify
Is a feature “local historic” (i.e., on a local registry)?	Determines whether statewide exemptions/limits apply and whether demolition/alteration is prohibited or limited	Verify with the City—local registry/map is referenced in § 9663.3 and § 9552.2.
Whether a resource is eligible for the State or National Register	Eligibility invokes Secretary‑of‑the‑Interior documentation standards and may limit demolition	Confirm professional determination and follow the state/national treatment requirements cited in the code. § (state/national register protection).
Oak‑tree “landmark” status and replacement caliper	Landmark trees carry larger replacement/planting burdens and special stock-size requirements	Confirm tree diameter measurement protocol and replacement schedule in § 9657 and Appendix A.
Whether the project triggers an archaeological Phase I	Under-design or late-phase discovery can delay projects and add mitigation cost	If grading/ground disturbance is proposed, plan for a Phase I; see cultural-resources rules. § (cultural resources preservation).
Applicability of Old Agoura discretionary standards vs. underlying zone	OA overlay often replaces/augments development limits (setbacks, coverage, FAR) and imposes design expectations	Verify whether your parcel lies within Subarea 11 and which standard (OA vs underlying zone) governs; see § 9552–9555.
Time limits for rebuilding damaged historic structures	Missed deadlines (the one‑year start rule) can change whether a reconstruction is permitted	Confirm the 1‑year commencement rule and possible director-approved extensions in § 9708.3.C.

Plain-English Summary

If your Agoura Hills project affects a building, landscape feature, or ground that might be historic, expect extra review: Old Agoura has its own overlay design rules and named landmarks get special reconstruction allowances; cultural-resource reports and tribal agreements may be required; and mature oaks (including landmark oaks) are protected and need permits and replacement planting plans. Follow the OA design guidance and meet the archaeological and oak‑tree requirements before building.

Source References

Old Agoura Overlay District purpose and permitted uses — § 9551–9552.
Old Agoura special development and design standards (height, coverage, signage) — § 9553–9555.
Nonconforming and reconstruction rules, including named Old Agoura historic structures — § 9708.3.C.
Citywide cultural- and archaeological-resource requirements and tribal treatment agreement language — (cultural resources preservation / tribal agreement provisions).
Oak Tree Preservation ordinance and Appendix A (permit triggers, definitions, replacement schedules) — § 9657 and Appendix A.
Definitions (including “historic property”) and the division with objective design standards — § 9663.3 and related objective‑design sections.
ADU rules and the section stating ADUs are allowed in historic districts but subject to objective standards to prevent adverse impacts — ADU provisions.
Housing-project exceptions referencing historic-district exclusions — § 9293.2.F.

Sources

Retrieved passages

Agoura Hills Zoning Code (section 9652.5) High relevance
Agoura Hills Zoning Code (section 9552.2) Medium relevance
Agoura Hills Zoning Code (section 7050.5) Medium relevance
Agoura Hills Zoning Code (section on) Medium relevance
Agoura Hills Zoning Code (article shall) Medium relevance
Agoura Hills Zoning Code (chapter does) Medium relevance
Agoura Hills Zoning Code (§ 9657) Medium relevance
Agoura Hills Zoning Code (section shall) Medium relevance
Agoura Hills Zoning Code (section 9552.2) High relevance
Agoura Hills Zoning Code (§ 2) Medium relevance
Agoura Hills Zoning Code (§ 2) Medium relevance
Agoura Hills Zoning Code (chapter shall) Medium relevance

Cited sections

Official Agoura Hills code library

Frequently asked questions

What protections exist for Old Agoura's historic buildings?

Old Agoura is an overlay with design and use controls intended to preserve its rural character; certain Old Agoura structures are explicitly identified as historic and get special treatment for reconstruction (e.g., allowed to be rebuilt to their pre‑damage footprint if work begins within one year). See § 9551–9555 and § 9708.3.C.

Do I need a cultural‑resource (archaeology) report for grading in Agoura Hills?

If a Phase I cultural resources screen or city rules indicate potential resources or your project involves ground disturbance, the code requires preservation in situ or a data‑recovery plan prepared by a qualified archaeologist. See the cultural‑resource provisions.

Are oak trees treated as “historic” resources in the code?

Yes. The Oak Tree Preservation sections require permits to remove or encroach into protected oak zones and include replacement schedules and special rules for large “landmark” oaks (diameter thresholds and nursery stock requirements). See § 9657 and Appendix A.

If my house is in a historic district, can I build an ADU?

Yes — ADUs are allowed in historic districts under the local ADU provisions, but the city may apply objective design and development standards that prevent adverse impacts on historic resources. See the ADU provisions for the local standards and exemptions.

What happens if a named Old Agoura structure is damaged by fire?

For the named Old Agoura historic structures, the ordinance allows rehabilitation or reconstruction up to 100% of pre‑damage size if restoration starts within one year and the design is approved by the Director of Planning and Community Development. See § 9708.3.C.

Does the city require tribal monitoring if Native American resources are found?

Yes. If tribal or Native American cultural resources are present, the applicant must enter a cultural resources treatment agreement with an affiliated tribe acknowledged by the NAHC; the agreement covers monitoring, treatment, scheduling, compensation, and the tribe’s authority to pause grading for evaluation. See the tribal agreement provisions.

Where are OA signage and materials rules described?

Sign materials, illumination limitations, and sign‑off hours for some OA areas are listed in the OA sign and design standards; see § 9553.5–9553.6 for materials and illumination constraints. § 9553.5–9553.6.

Are there objective height/coverage numbers I can rely on in Old Agoura?

Yes — the OA special area sets a typical maximum building height of 35 ft / 2 stories and contemplates building coverage levels approved through discretionary review (generally not exceeding 50% for commercial lots). See § 9553.2 and § 9553.1.

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