Modesto — Historic Preservation

Last reviewed: July 2, 2026

Overview

This page explains how Modesto's zoning ordinance treats historic preservation inside the city’s zoning and downtown form-based code. The Downtown Zones and several general zoning provisions include specific controls for historic preservation sites, limits on demolition/relocation, compatibility controls for new development, and carve-outs for existing historic nonconforming structures. The rules to watch are in the Downtown article (Title 10, Article 7, Chapter 5) and the nonconforming uses article (Title 10, Chapter 3).

What the Modesto ordinance actually says (synthesis)

• The Downtown form‑based code explicitly intends to "preserve and enhance downtown's historic buildings and sites" and identifies Historic Preservation sites for special treatment in that article (§ 10-7.505).

• A defined term points the reader to the Historic Preservation rules: Historic Preservation Site is defined by cross‑reference to § 10-7.515(c) (the code text treats those sites as “special areas”). See § 10-7.516(p) for the definition pointer.

• For properties designated as Historic Preservation Sites, relocation or demolition is not permitted except in accordance with Modesto Municipal Code Title 9, Chapter 10 and the state CEQA/PRC rules referenced in the zoning language — the downtown article treats demolition/relocation of listed resources as controlled by the City’s historic‑resource/demolition procedures. § 10-7.515(c)(i) (zoning article text).

• New development adjoining historic resources has a measured compatibility rule: new development shall be no greater than two (2) stories higher or lower than the historic building. This is an express compatibility limit in the Downtown special areas rules (§ 10-7.515(c)(ii)).

• All new development in the Downtown Zones is subject to Development Plan Review, and the Downtown article supersedes conflicting Title 10 standards when applicable; Downtown Zones have a specific administration and process path. §§ 10-7.502, 10-7.501.

• Existing legally established downtown buildings get a limited exception: repairs, remodels, and expansions up to 25% of building or site area may use “Downtown Modesto Historic Zoning Designation” standards that were previously in effect; expansions above 25% default to the current article unless an administrative exception is granted. § 10-7.503.

• The nonconforming‑uses provisions protect historic buildings from amortization: nonconforming structures certified as historic by the City, County, State, or National Register are exempt from amortization termination rules that otherwise require termination or short continuance. See the nonconforming rules/amortization provisions (notably the amortization exemptions). § 10-3.505 (amortization / exemptions).

• Downtown projects that touch historic sites remain subject to the City's Design Guidelines (applied via the zoning article) and sign, utility‑screening, and frontage standards — the downtown article explicitly folds design guidelines into review for compatibility. § 10-7.515(d)(1) and related downtown provisions.

Notes on sources: the downtown form‑based code refers specifically to § 10-7.515(c) for the Historic Preservation Site rules and defines the term in § 10-7.516(p); the literal Figure 7.5‑1 (historic zoning designation map) and some figures were omitted from the extracted file, so parcel‑level mapping must be verified with the City.

District-by-district breakdown (Downtown Zones)

Below are the Downtown Zones that carry historic preservation language. Each subsection cites the Modesto ordinance where that zone is described and/or where the historic rules apply. For parcel‑specific mapping, verify with the City's zoning map and Figure 7.5‑1.

Central Downtown — CD

• Purpose: most intensive downtown center; explicitly contains Historic Preservation sites on the General Plan landmark list and receives special consideration in the Downtown article. § 10-7.505(a) and § 10-7.506 describe the CD zone.
• Typical permitted uses: mixed commercial/residential uses per the Downtown code; uses are controlled by the Downtown article (form‑based use tables). § 10-7.506 (see Downtown use tables).
• Key dimensional/administrative standards: development in Downtown requires Development Plan Review and must follow Downtown frontage/building‑type rules; historic sites in CD are subject to the special areas rules (no demolition/relocation except per Title 9 Chapter 10). §§ 10-7.502, 10-7.515(c).
• Where it applies: downtown core — see zoning map and Downtown Figure 7.5‑1 (verify map with Planning Dept.).

Transition Downtown — TD

• Purpose: intensive but reduced scale relative to CD; contains Historic Preservation sites as well. § 10-7.505(b) and § 10-7.507.
• Uses & standards: same Downtown review regime; historical special areas language applies (compatibility/height adjacency limits, demolition controls). §§ 10-7.502, 10-7.515(c).

Urban General Downtown — UGD

• Purpose: link between Central Downtown and outer areas, supportive of housing and mixed uses. § 10-7.505(c).
• Historic treatment: Historic Preservation Site protections and design guidelines apply when a historic resource is present. § 10-7.515(c).

Main Street Downtown — MSD

• Purpose: smaller scale, main‑street commercial character; accommodates residential uses. § 10-7.505(d).
• Historic treatment: the Downtown special areas rules apply to historic resources in MSD. § 10-7.515(c).

East Neighborhood Downtown — END

• Purpose: transition area originally residential but changing to commercial; has parts with Historic Preservation sites. § 10-7.505(e).
• Special rules: Downtown design guidelines and historic special area protections apply where resources exist. § 10-7.515(c).

Traditional Neighborhood Downtown — TND

• Purpose: residential character, compatible with historic single‑family neighborhood traits. § 10-7.505(f).
• Historic treatment: where historic resources exist the Downtown special areas rules apply; TND also has equivalencies to R‑2 when applying some expansion standards. § 10-7.503(iv).

(If your property is outside the Downtown Zones, historic controls may still appear elsewhere in Title 10 or in Title 9 historic preservation regulations — see Risks & Ambiguities below for what to verify.)

Quick reference table — most decision‑relevant standards

Practical guidance / plain‑English interpretation (original analysis)

• If your property is in Downtown (CD/TD/UGD/MSD/END/TND) and is listed as a historic or landmark site on the General Plan or local inventory, expect two parallel threads of review: (1) the Downtown form‑based Development Plan Review (to check form, frontage, and use), and (2) historic‑resource procedures for any exterior work, demolition, or relocation. Both must be satisfied. §§ 10-7.502, 10-7.515(c).

• Small repairs that keep the original materials and style and do not expand beyond the 25% threshold are more likely to be approved administratively under the existing‑development exception; larger additions typically trigger full review and could be required to meet compatibility (including the two‑story adjacency limit). § 10-7.503.

• If a property is certified as historic by a recognized authority, the nonconforming‑use amortization tools cannot be used to force removal — the code explicitly exempts historic structures from amortization. That protects occupancy/use rights for certified historic structures. § 10-3.505(c)(2)(a).

• The Downtown code points to the City's design standards — you must apply the City of Modesto Design Guidelines during review. Where the downtown article and the design guidelines intersect, the Downtown article governs form and uses while design guidelines drive material and aesthetic decisions applied in review. § 10-7.515(d)(1).

• For projects that also touch planning matters like parking, signs, ADUs, or variances, those topic rules still apply (and may have historic‑specific exceptions). For example, ADU permitting rules exist and state law governs historic‑resource treatment for ADUs; always confirm whether an ADU will trigger additional historic review. See the city's ADU and nonconforming sections when planning accessory units. (See checklist below.) §§ 10-4.503; 10-3.505.

Links: the zoning/permit topics you will commonly touch in a historic project include design review, parking, development standards, overlays, ADUs and the building code; see the City topic pages for procedural details on each:

• design review: Modesto Design Review
• parking: Modesto Parking
• development standards: Modesto Development Standards
• overlay districts: Modesto Overlay Districts
• ADUs: Modesto ADUs
• California Building Standards Code: California Building Standards Code
• nonconforming uses: Modesto Nonconforming Uses
• variances: Modesto Variances and Exceptions

(Each of the above is linked at its first natural mention in the guidance above.)

Checklist — what an applicant must assemble and satisfy

• Confirm whether the property is within a Downtown Zone (CD, TD, UGD, MSD, END, TND) and whether it is listed as a Historic Preservation Site or on the local/General Plan landmark list (see § 10-7.505 and Figure 7.5‑1).
• Review § 10-7.515(c) special areas rules: if the property is listed, plan for historic‑resource review; demolition/relocation require compliance with Title 9, Chapter 10 procedures and CEQA processes.
• Prepare for Downtown Development Plan Review submittal (plans, elevations, materials, site plan, and any design‑guideline responses). § 10-7.502.
• If proposing repairs/expansions, calculate whether the change is ≤ 25% of building or land area to determine whether the existing‑development exception applies (§ 10-7.503).
• If proposing adjacent new development, confirm the project massing respects the ±2‑story adjacency limit next to historic buildings (§ 10-7.515(c)(ii)).
• If the resource is certified historic, document the certification (City/County/State/National) to apply exemptions from amortization. § 10-3.505(c)(2)(a).
• Coordinate any sign, parking, ADU, or utility changes with the applicable chapters (sign code, parking standards, ADU rules); provide required studies or CEQA documentation if demolition or substantial alteration is proposed. Verify specifics with staff.

Risks & Ambiguities

Plain‑English Summary

If your Modesto property is listed as a historic landmark or sits inside one of the Downtown Zones with a historic site, demolition is tightly restricted and exterior changes are reviewed for compatibility: expect Development Plan Review, design‑guideline requirements, and special historic procedures — small repairs/25% expansions may follow streamlined rules, but larger work will require full review and likely historic‑resource approvals. Verify listing and map with the Planning Department before designing.

Source References

• Modesto Municipal Code, Downtown Article (Title 10, Article 7, Downtown Zones) — § 10-7.505 (Downtown purpose — preserve historic buildings).
• Modesto Municipal Code, Downtown Article — § 10-7.502 (Administration / Development Plan Review required in Downtown).
• Modesto Municipal Code — § 10-7.503 (Existing development exception; 25% rule).
• Modesto Municipal Code — § 10-7.515(c) (Special Areas: Historic Preservation Sites; demolition/relocation and adjacency limits).
• Modesto Municipal Code — § 10-7.516(p) (definition pointer: Historic Preservation Site; see § 10‑7.515(c)).
• Modesto Municipal Code — § 10-3.505 / 10-3.502 (Nonconforming uses / amortization exemptions for historic structures).
• Design guideline reference in downtown article — § 10-7.515(d)(1) (use of City of Modesto Design Guidelines in downtown review).
• Code cross‑references to demolition procedures — downtown article references Title 9, Chapter 10 for historic resource demolition process (text not included in supplied files).

Retrieved passages

• Modesto Zoning Code (§ 2) High relevance show source text
• Modesto Zoning Code (section of) High relevance show source text
• CMC § 622 High relevance show source text
• Modesto Zoning Code High relevance show source text
• Modesto Zoning Code High relevance show source text
• Modesto Zoning Code (Section 10-6.107) Medium relevance show source text
• CPC § 300 Medium relevance show source text
• Modesto Zoning Code (Section 10-3.502) Medium relevance show source text
• Modesto Zoning Code (Article 4) Medium relevance show source text
• Modesto Zoning Code (Chapter 9) Medium relevance show source text
• Modesto Zoning Code (Chapter 15) Medium relevance show source text
• Modesto Zoning Code (section contains) Medium relevance show source text
• Modesto Zoning Code (Section 10-7.515) Medium relevance show source text
• Modesto Zoning Code (Section 10-7.108) Medium relevance show source text
• Modesto Zoning Code (Section 10-7.515) Medium relevance show source text
• Modesto Zoning Code (Article 5.) Medium relevance show source text
• CFC § 10 (Title shall) Medium relevance show source text
• Modesto Zoning Code (section but) Medium relevance show source text
• Modesto Zoning Code (Section 10-3.505) Medium relevance show source text
• Modesto Zoning Code (Section 10-3.303) Medium relevance show source text
• Modesto Zoning Code (Title or) Medium relevance show source text

Cited sections

• Modesto Municipal Code, Downtown Article (Title 10, Article 7, Downtown Zones) — **§ 10-7.505** (Downtown purpose — preserve historic buildings). (Title 10)
• Modesto Municipal Code, Downtown Article — **§ 10-7.502** (Administration / Development Plan Review required in Downtown). (§ 10-7.502)
• Modesto Municipal Code — **§ 10-7.503** (Existing development exception; 25% rule). (§ 10-7.503)
• Modesto Municipal Code — **§ 10-7.515(c)** (Special Areas: Historic Preservation Sites; demolition/relocation and adjacency limits). (§ 10-7.515)
• Modesto Municipal Code — **§ 10-7.516(p)** (definition pointer: Historic Preservation Site; see § 10‑7.515(c)). (§ 10-7.516)
• Modesto Municipal Code — **§ 10-3.505 / 10-3.502** (Nonconforming uses / amortization exemptions for historic structures). (§ 10-3.505)
• Design guideline reference in downtown article — **§ 10-7.515(d)(1)** (use of City of Modesto Design Guidelines in downtown review). (§ 10-7.515)
• Code cross‑references to demolition procedures — downtown article references **Title 9, Chapter 10** for historic resource demolition process (text not included in supplied files). (article references)
• Modesto_ZoningCode.md
• 2025 California Historical Building Code.md

• Official Modesto code library