Local zoning · Merced

Merced — Historic Preservation

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

Last reviewed: July 2, 2026

Overview

Merced treats historic preservation as a discrete planning entitlement that plugs into its Zoning Ordinance (Title 20). The code references a local historic-preservation chapter (Chapter 17.54) and processes “Design Review / Historic Preservation” actions through the same discretionary review path used for design review (planning commission as the decision-maker for most cases). Key cross-links in the zoning code show historic resources can affect sign rules, wireless siting, ADU handling, and design-review boundaries. See the specific review and permitting rules in § 20.64.030, § 20.68.030, § 20.58.040, § 20.62.220, and § 20.42.010 for how those programs interact with preservation.

Note: the actual local preservation regulations (the text of Chapter 17.54) were not included in the retrieved materials; where the zoning code references Chapter 17.54 the ordinance cross-references it but the Chapter 17.54 text itself is Not found in retrieved materials (see “Information Gaps” below). Verify final designation criteria and application forms with the jurisdiction.

How Historic Preservation is implemented in the zoning ordinance (short synthesis)

Historic matters are treated as a discretionary “Design Review / Historic Preservation Permit” in the same review table that assigns decision authority for other permits; the planning commission is the primary decision body for those permits per § 20.64.030.
Design review rules that apply to downtown and adjacent areas (Figure 20.68‑1) set the geographic scope where design/historic review is typically required; the Design Review chapter lists findings and principles used to judge appearance, materials, and neighborhood compatibility (see § 20.68.030). Use the design review guidance when you prepare historic-project submittals.
Several operational sections of Title 20 rely on the historic chapter for specific exceptions and prohibitions: signs designated as historic are exempt from ordinary sign rules (§ 20.62.220), wireless support towers are prohibited on historic resources (§ 20.58.040), and ADU standards must respect historic resources per state and local rules as implemented in the ADU chapter (§ 20.42.010 and § 20.42.030). Link to signage, parking, and development standards when considering related changes.

District-by-district notes (how historic-preservation review interacts with common Merced zoning districts)

For each below, the “Where it applies” line points to typical places Merced expects historic/design review attention (downtown and mapped overlay areas) and the code sections that govern review authority and applicability.

R-1 (Single-Family Residential)

Purpose (base): neighborhood, single-family homes and small infill. See residential development standards in Chapter 20.08.
Typical permitted uses: single-family dwellings, accessory structures (including ADUs per § 20.42.030).
Key dimensional standards: front setback commonly 30 ft or 15–30 ft depending on subdistricts; maximum height 35 ft; lot coverage varies by R-1 type (see Table 20.08 series). These dimensional standards are established in the residential tables in § 20.08.030 and associated tables. (See § 20.08.030)
Where it applies for preservation: exterior alterations to designated local resources in R-1 are subject to the Design Review/Historic Preservation process and any applicable overlay; design review boundaries (downtown/adjacent) are shown in Figure 20.68‑1 and in § 20.68.030 (exceptions exist for single‑family detached dwellings in some design-review areas). (See § 20.68.030)

R-2 / R-3 / R-4 (Higher-density Residential)

Purpose: multi-family housing and mixed-density residential. Dimensional standards and density limits are in the residential tables (Tables 20.08‑2 / 20.08‑3). (See § 20.08.030)
Typical permitted uses: duplexes, multi-family, accessory units (ADUs), and compatible community uses. (See § 20.08.030; § 20.42.030 for ADUs)
Historic interaction: exterior work to buildings designated as historic (or within a locally designated historic district) triggers design/historic review; ADU work on historic lots is allowed but may be subject to objective standards to avoid adverse impacts (local ADU chapter and state law). (See § 20.42.010 & § 20.42.030)

C‑C, C‑N, C‑SC (Commercial zones; including Downtown C-C)

Purpose: commercial activity, with the downtown/regional center emphasis in C‑C. Table 20.10‑2 sets setbacks and heights by commercial district. (See § 20.10 (commercial standards))
Typical uses: retail, offices, restaurants, civic uses (subject to use tables in Part 2). (See Table 20.10‑2)
Historic interaction: downtown buildings in C‑C often fall into the design-review area; historic storefronts and historic signs are explicitly treated: a sign designated as a historic resource per Chapter 17.54 is exempt from usual sign controls per § 20.62.220. Design Review/Historic Preservation Permit will be used for façade changes in the downtown area.

I‑L / I‑H (Light / Heavy Industrial)

Purpose: industrial operations. Standards and industrial buffer rules are in Chapter 20.12 and Table 20.12‑2. (See § 20.12)
Typical uses: manufacturing, warehousing, distribution.
Historic interaction: the design-review chapter excludes I‑L and I‑H from design‑review and instead routes development to site-plan review (§ 20.68.030.B.1–2). Additionally, installation of wireless support towers on a historic resource is expressly prohibited (§ 20.58.040).

Overlay zones (Urban Residential Overlay, Historic Overlays)

Purpose: overlays add area‑specific rules on top of the base zoning; the ordinance states overlay rules control when they conflict with base zoning (§ 20.22.010). Use the overlay districts guidance.
Historic overlay: The code references historic overlay tools (Chapter 17.54), but the actual text and mapped boundaries for a local historic overlay were Not found in retrieved materials. See “Information Gaps.” Verify overlay maps with Development Services.

Decision‑relevant table (quick reference)

Topic	Rule or practical effect	Code reference
Who decides a Design Review / Historic Preservation Permit?	Planning Commission is the decision-making authority for Design Review/Historic Preservation Permits (with appeals to City Council).	§ 20.64.030
Where Design Review is required	Design Review required for most new structures/modifications in downtown and immediately west as shown in Figure 20.68‑1; exceptions for single‑family detached dwellings and accessory structures.	§ 20.68.030
Historic signs	A sign designated as a historic resource under Chapter 17.54 is exempt from ordinary sign code requirements (except building permits).	§ 20.62.220
Wireless facilities on historic resources	Support towers on a local/state/national historic resource are prohibited; antenna attachments must comply with Chapter 17.54.	§ 20.58.040(C)(1)
ADUs and historic properties	ADUs are allowed on lots in historic districts and on lots with historic primary residences; local objective standards to avoid adverse impacts may apply but must conform to state ADU law as implemented in Chapter 20.42.	§ 20.42.010 and § 20.42.030
Application procedure & fees	Permit applications follow Chapter 20.66 procedures; pre‑application conferences recommended; fees per the Planning Fee Schedule.	§ 20.66.020 – § 20.66.030

Checklist (what an applicant should prepare for a historic-preservation submittal in Merced)

Confirm whether the property or feature is listed or designated in the city’s historic resource inventory (verify with Development Services). Not found in retrieved materials: procedure for listing in Chapter 17.54. Verify with jurisdiction.
Complete the City permit application and pay fees per § 20.66.030; request a pre‑application meeting (recommended by § 20.66.020).
Determine whether the site falls inside the city’s Design Review boundaries (Figure 20.68‑1); if yes, prepare a Design Review/Historic Preservation submittal per § 20.68.030 (plans, materials, elevations, photos).
Prepare an impact analysis addressing design review findings (consistency with General Plan, neighborhood compatibility, materials/texture/color, and public welfare) per design‑review findings in § 20.68.030(G–H).
If proposing signage changes to a designated historic sign, include historic sign documentation — the sign may be treated under special rules in § 20.62.220.
If the project involves wireless equipment or antennas, confirm compatibility with § 20.58.040 (support towers prohibited on historic resources).
If proposing ADUs on a historic lot, follow Chapter 20.42 ADU rules and be prepared to show that objective standards prevent adverse impacts (and that state law requirements are met). Link to ADUs.
Expect public notice/public hearing rules: discretionary actions follow Chapter 20.70 (notice & hearing) and may require hearings before the Planning Commission; appeals go to City Council.

Risks & Ambiguities

Issue	Why it matters	What to verify
Text of Chapter 17.54 (designation criteria, demolition review, certificate of appropriateness)	The zoning code repeatedly defers to Chapter 17.54 for historic-resource definitions and special procedures, so the substance lives there. Without it you cannot confirm how landmarks are designated or what treatments are allowed.	The text of Chapter 17.54 and the City’s local historic inventory/map. Not found in retrieved materials — verify with Development Services.
Whether a parcel is inside the Design Review boundary (Figure 20.68‑1)	Determines whether Design Review (and therefore most historic-preservation review) is required; single‑family exceptions may apply.	Check the city’s Figure 20.68‑1/official zoning map and ask planning staff. § 20.68.030.
How “historic sign” status is applied and recorded	Historic sign status triggers specific exemptions and special refurbishment rules under § 20.62.220.	Confirm the list/map of designated historic signs and the application process under Chapter 17.54 (not in retrieved materials).
Demolition controls	Demolition of a designated resource can trigger separate review, but the code references Chapter 17.54 for procedures.	Obtain Chapter 17.54 text to see demolition delay/notice requirements. Not found in retrieved materials.
ADU treatments on historic lots	ADUs are allowed (Chapter 20.42), but state ADU law and local objective standards can both affect review.	Confirm how the city applies objective ADU standards where a property is designated historic; see § 20.42.010 and state ADU guidance.

Plain-English summary

Merced’s zoning code makes historic preservation a discretionary, design-oriented review handled like design review: projects affecting designated resources typically need a Design Review / Historic Preservation permit decided by the Planning Commission and processed under the city’s normal permit rules — but the actual designation rules and details live in Chapter 17.54, which was not included in the retrieved materials, so you must confirm designation criteria, demolition controls, and application forms with Development Services. (See § 20.64.030; § 20.68.030; references to Chapter 17.54.)

Source References

Merced City Zoning Ordinance (Title 20), Administrative responsibility and decision authority table: § 20.64.030.
Merced City Zoning Ordinance, Design Review permit (purpose, applicability, findings): § 20.68.030 (Design Review Boundaries and rules).
Merced City Zoning Ordinance, Wireless facilities / historic resource prohibition: § 20.58.040(C)(1).
Merced City Zoning Ordinance, Historic signs exemptions: § 20.62.220.
Merced City Zoning Ordinance, ADUs (purpose/applicability/design requirements): § 20.42.010 and § 20.42.030.
Merced City Zoning Ordinance, Residential development standards and tables (R‑1–R‑4): § 20.08.030 and Table references (Tables 20.08‑2 / 20.08‑3).
Merced City Zoning Ordinance, Permit application and review procedures: § 20.66.020 – § 20.66.030.
Merced City Zoning Ordinance, Public notice and hearing timing / appeals: Chapter 20.70 (e.g., § 20.70.050–.060).

Additional internal resources you may use on GoCodebook when assembling a full application: Merced zoning & planning overview, Merced Zoning, Merced Land Use, Merced Development Standards, Merced Parking, Merced Design Review, Merced Overlay Districts, Merced Signage, Merced ADUs, California Building Standards Code.

Information Gaps

The full text of Chapter 17.54 (Historic Preservation) — the city code repeatedly defers to Chapter 17.54 for definitions, landmark/district designation criteria, demolition-delay procedures, certificates of appropriateness, and procedures for historic signage. Not found in retrieved materials. Verify with the City of Merced Development Services Department or the municipal code online.
The city’s official local historic-resource inventory/map and any locally adopted historic-overlay boundaries — these are necessary to determine if a parcel is designated. Not found in retrieved materials. Verify with Development Services.
Application forms, fee amounts, and exact submittal checklist used by Merced for historic-designation or historic‑preservation permits (the procedural chapters require a permit but the specific forms/fees are maintained separately). Check the Planning Fee Schedule and the Development Services intake instructions. (See § 20.66.030)

Sources

Retrieved passages

Merced Zoning Code (§ 2) High relevance
Merced Zoning Code (§ 2) High relevance
Merced Zoning Code (Section 20.04.030) High relevance
Merced Zoning Code (Chapter 17.36) High relevance
Merced Zoning Code (§ 2) High relevance
Merced Zoning Code (§ 2) Medium relevance
Merced Zoning Code (§ 65915) Medium relevance
Merced Zoning Code (§ 2) Medium relevance
Merced Zoning Code (Chapter 17.54) Medium relevance
Merced Zoning Code (Chapter 20.74) Medium relevance
Merced Zoning Code (section and) Medium relevance
Merced Zoning Code (§ 2) Medium relevance
Merced Zoning Code (Chapter 9.08) Medium relevance
Merced Zoning Code (§ 1) Medium relevance
CBC § 125 (Chapter 20.42) Medium relevance
Merced Zoning Code (§ 1) Medium relevance
CBC § G106 (SECTION G106) Medium relevance
Merced Zoning Code (§ 2) Medium relevance
Merced Zoning Code (Chapter 20.74) Medium relevance
Merced Zoning Code (Section 20.22.040) Medium relevance
Merced Zoning Code (Chapter 20.42) Medium relevance
CBC § 000 (Chapter 20.38) Medium relevance
CBC § 2 (Chapter 6.04) Medium relevance
CBC § 2 (§ 2) Medium relevance
Merced Zoning Code (Chapter 20.50) Medium relevance
Merced Zoning Code (§ 66317) Medium relevance

Cited sections

Official Merced code library

Frequently asked questions

Do I need a historic-preservation permit to change the exterior of a building in Merced?

If the building is a locally designated historic resource or is within a local historic district, the zoning code treats such work through the Design Review/Historic Preservation pathway and the Planning Commission is the decision authority for that permit type under § 20.64.030; design-review requirements and findings are in § 20.68.030. If the property is not designated you generally follow standard design‑review or ministerial rules depending on location.

What can I build on an R‑1 lot in Merced and how does historic status change that?

R‑1 allows single‑family residences and accessory structures (including ADUs); dimensional standards for R‑1 (setbacks, heights, lot coverage) are given in the residential development tables under § 20.08.030. If the R‑1 property is designated historic, exterior work and some alterations will be subject to the Design Review/Historic Preservation process; the code directs applicants to Chapter 17.54 for the preservation rules (text not found in retrieved materials).

What are the Merced setback and height requirements I should budget for on a historic house?

Base setbacks and heights are set in the residential tables (see § 20.08.030 and associated tables — for many R‑1 types front setbacks are commonly 15–30 ft and max height 35 ft). Historic designation does not automatically change those base numbers in Title 20, but design/historic review may impose conditions or require preservation‑sensitive solutions under § 20.68.030. Always verify the specific table applying to your R‑1 subtype.

Are ADUs allowed if my house is in a historic district or is designated historic?

Yes. Merced’s ADU chapter permits ADUs in residential zones and allows ADUs on lots where the primary residence is subject to historic preservation; Chapter 20.42 sets ADU standards and the city notes ADUs must not unreasonably impact historic resources — objective standards may apply. Confirm whether special objective standards apply where a property is designated; the ADU chapter references both local and state rules. (See § 20.42.010; § 20.42.030)

Does a historic designation change the sign rules for my property?

If a sign has been designated a historic resource under Chapter 17.54, that sign (or its reproduction) is exempt from the regular sign chapter requirements except for obtaining necessary building permits, per § 20.62.220. The Planning Commission can require refurbishment conditions for historic signs. However, the mechanics of designating a sign are in Chapter 17.54 (text not in retrieved materials).

Can I put a cell tower or support tower on or next to a designated historic property?

The code prohibits installation of a support tower on a local/state/national historic resource; antenna attachments must comply with Chapter 17.54. Installation near residential zones has additional CUP triggers. See § 20.58.040(C)(1).

Who hears appeals of historic-preservation decisions?

Decisions by the Planning Commission (which typically decides Design Review/Historic Preservation permits) may be appealed to the City Council following the appeals process in Chapter 20.74 and the notice rules in Chapter 20.70. (See § 20.64.030 and Chapter 20.74)

How do I start an application for a historic permit in Merced?

Start with a pre‑application conference and submit a complete permit application under Chapter 20.66 (application contents and fees are covered there); staff will confirm which discretionary route (design review, site‑plan review, CUP) applies. (See § 20.66.020 – § 20.66.030)

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