Santa Cruz County — Historic Preservation

Last reviewed: July 6, 2026

Overview

Historic preservation in the unincorporated areas of Santa Cruz County is implemented through the County’s Zoning Ordinance (Title 13) via the Historic Landmark L Combining District and several cross-referenced standards that alter how otherwise-applicable site rules work on designated historic resources. Core decision-making on alterations, demolitions, and similar actions for designated resources is referenced to Chapter 16.42 Historic Resource Preservation. This page synthesizes the zoning-side rules and where they plug into related processes like design review, overlay districts, development standards, and parking.

Plain-English anchor: If your property is a designated historic resource in unincorporated Santa Cruz County, your base zoning still applies, but an additional “L” historic landmark overlay attaches special review and a few unique dimensional allowances. Most alteration/demolition decisions are made under Chapter 16.42, referenced throughout the zoning code.

Where historic preservation shows up in the zoning code

• The County uses the L (Historic Landmark) Combining District to flag parcels and improvements formally designated as historic resources; L “rides on top of” base zoning and points permitting to Chapter 16.42. See § 13.10.451–§ 13.10.453; also listed in the Combining Districts table.
• Residential and multifamily districts include a targeted FAR/coverage bump for properties with a designated historic resource: coverage up to 1.25× the district standard and FAR up to 0.6:1 where the standard FAR is 0.5:1. See § 13.10.323(F)(8).
• Nonconforming-structure rules include an express exception for designated historic resources, allowing certain modifications without triggering the usual nonconforming reconstruction thresholds if tight criteria are met. See § 13.10.262(A)(5)(a).
• The sign code allows small historic identification plaques and treats some historic-designated signs differently from standard “nonconforming sign” timelines. See § 13.10.586 and § 13.10.585.
• In the Coastal Zone, several “special community” areas list specific historic structures that “shall not be demolished,” with compatibility requirements for alterations and additions. See § 13.20.143, § 13.20.144, § 13.20.145.
• State-law programs are filtered through historic rules: for example, ministerial two‑unit (SB 9) projects are not eligible on lots designated as a County historic property or district in the County Historic Resources Inventory. See § 13.10.327(C)(3)(b).
• ADUs on historic sites are ministerial only if they meet specific Historic Resource Commission criteria; otherwise, they shift into discretionary review under Chapter 16.42. See § 13.10.681(F)(2).

District-by-district breakdown

L (Historic Landmark) Combining District

• Purpose and scope. The L district preserves and regulates sites, structures, and districts of historic, archaeological, cultural, architectural, or aesthetic significance. It applies where the Board of Supervisors has designated a resource under Chapter 16.42. See § 13.10.451 and § 13.10.452.
• What it controls. In L, any use, alteration, new construction, relocation, demolition, or excavation affecting a historic structure, object, site, or district is subject to Chapter 16.42 procedures and standards (zoning continues to apply as the base layer). See § 13.10.453.
• Typical permitted uses. The L overlay does not change the base zone’s permitted uses; it adds preservation controls. Verify underlying zoning at Santa Cruz County Zoning. Not found in retrieved materials beyond § 13.10.453 cross-reference.
• Key dimensional tweaks countywide for designated resources. Outside of the overlay text itself, the residential standards add a coverage/FAR allowance for parcels with a designated historic resource: up to 1.25× standard lot coverage and up to 0.6:1 FAR where the standard is 0.5:1. See § 13.10.323(F)(8).
• Where it applies. Only to designated historic resources in the unincorporated areas (not in incorporated cities). See § 13.10.452.

Coastal Zone “Special Community” criteria with listed historic structures

• Davenport. Saint Vincent de Paul Catholic Church and Davenport Jail are listed; they shall not be demolished; renovations must respect historic character; additions must be compatible. See § 13.20.143.
• Harbor Area. Parsonage for Twin Lakes Baptist Church and Twin Lakes Library are listed with the same non-demolition and compatibility requirements. See § 13.20.144.
• East Cliff Village tourist area. Buckhart’s Confectionery is listed with the same treatment. See § 13.20.145.

Decision-relevant standards at a glance

Process touchpoints and how it fits with other County reviews

• Historic work in L is routed to Chapter 16.42; separate from but coordinated with any design review that a project might otherwise need under Title 13. See § 13.10.453; § 13.11.010 for design-review purpose.
• In the Coastal Zone, development must also comply with Chapter 13.20. These coastal standards take precedence where they are more protective. See § 13.20.020(C).
• If you need dimensional relief beyond the historic-specific allowances, you may still seek relief via variances and exceptions; note that exceptions don’t typically override combining district standards. See § 13.10.235(B).
• Normal parking, signage, and nonconforming uses rules continue to apply unless a specific historic-related standard says otherwise. See § 13.10.585–§ 13.10.587; § 13.10.262 cross-refs.

Practical guidance

• Start with confirmation: Is your parcel in the L overlay and/or called out in a Coastal “special community” section? Check overlay maps and the Combining Districts table. See § 13.10.451–§ 13.10.453; Table 13.10.400‑1 summary.
• If your resource is designated, consider using the coverage/FAR flexibility to fit needed program into a compatible footprint; make sure your design stays consistent with Chapter 16.42 and the Secretary’s Standards if you plan to rely on nonconforming-structure flexibility. See § 13.10.323(F)(8) and § 13.10.262(A)(5)(a).
• Planning an ADU? On historic sites, read the ADU section’s historic subsection first; ministerial review is only available when the HRC-related criteria are met. See § 13.10.681(F)(2).
• In coastal special communities with named historic buildings, demolition is off the table; work toward compatible rehabilitation instead. See § 13.20.143–§ 13.20.145.
• Separate from zoning, some proposals could invoke the California Building Standards Code (including the Historical Building Code). Verify with the jurisdiction. Not found in retrieved materials.

Checklist

• Confirm your parcel is in unincorporated Santa Cruz County and identify the base zone and any overlays via Santa Cruz County Zoning.
• Determine whether the site/resource is designated and mapped in the L Combining District (or listed in Coastal “special community” sections). See § 13.10.451–§ 13.10.453; § 13.20.143–§ 13.20.145.
• Scope the project against Chapter 16.42 triggers (alteration, addition, demolition, relocation, excavation). Not found in retrieved materials; verify with the jurisdiction.
• If residential, check whether the historic FAR/coverage allowance helps you right-size the design: § 13.10.323(F)(8).
• If the structure is nonconforming, see if the historic exception applies to your modification plan: § 13.10.262(A)(5)(a).
• For ADUs, confirm whether your proposal remains ministerial or needs discretionary review under Chapter 16.42: § 13.10.681(F)(2).
• Confirm any needed design review under Chapter 13.11, especially for multifamily/commercial work.
• Check applicable signage allowances (historic plaques) and constraints (historic nonconforming signs): § 13.10.586, § 13.10.585.
• If you need relief beyond historic allowances, evaluate a variance or minor exception. See § 13.10.235.

Risks & Ambiguities

Plain-English Summary

In unincorporated Santa Cruz County, historic designation adds an L overlay that doesn’t change your base zoning but does add preservation review and a few targeted incentives. Expect Chapter 16.42 to govern most decisions about changes to the resource; zoning provides extra flexibility like a small FAR/coverage bump, limited nonconforming-structure relief, and plaque signage—plus special Coastal rules that outright prohibit demolition of a handful of named buildings.

Source References

• Historic Landmark L Combining District purpose, designation, standards: § 13.10.451–§ 13.10.453.
• Combining Districts table listing L: Table 13.10.400‑1.
• Residential historic FAR/coverage allowance: § 13.10.323(F)(8) (note in tables).
• Nonconforming structures—historic exception: § 13.10.262(A)(5)(a).
• Historic identification plaques: § 13.10.586.
• Historic nonconforming signs: § 13.10.585.
• Coastal special community historic listings: § 13.20.143, § 13.20.144, § 13.20.145.
• SB 9 two‑unit ineligibility on County historic properties/districts: § 13.10.327(C)(3)(b).
• ADUs on historic parcels—ministerial vs. discretionary: § 13.10.681(F)(2).
• Design review framework: § 13.11.010.
• Coastal Zone regulations precedence and scope: § 13.20.020.

Retrieved passages

• Santa Cruz County Zoning Code (§ 3) High relevance show source text
• Santa Cruz County Zoning Code (§ 3) High relevance show source text
• Santa Cruz County Zoning Code (Chapter 16.10) Medium relevance show source text
• Santa Cruz County Zoning Code (§ 3) Medium relevance show source text
• Santa Cruz County Zoning Code (chapter within) Medium relevance show source text
• Santa Cruz County Zoning Code (Chapter 13.10) Medium relevance show source text
• Santa Cruz County Zoning Code (§ 1) Medium relevance show source text
• Santa Cruz County Zoning Code (section are) Medium relevance show source text
• Santa Cruz County Zoning Code (Chapter 13.12) Medium relevance show source text
• Santa Cruz County Zoning Code (§ 1) Medium relevance show source text
• CFC § 1270.00 (Chapter 13.16) Medium relevance show source text
• CFC § 1270.00 (Chapter 13.16) Medium relevance show source text
• Santa Cruz County Zoning Code (section shall) Medium relevance show source text
• Santa Cruz County Zoning Code (§ 18.10.210) Medium relevance show source text
• Santa Cruz County Zoning Code (§ 4) Medium relevance show source text
• Santa Cruz County Zoning Code (section is) Medium relevance show source text
• Santa Cruz County Zoning Code (section unless) Medium relevance show source text

Cited sections

• Historic Landmark L Combining District purpose, designation, standards: § 13.10.451–§ 13.10.453. (§ 13.10.451)
• Combining Districts table listing L: Table 13.10.400‑1.
• Residential historic FAR/coverage allowance: § 13.10.323(F)(8) (note in tables). (§ 13.10.323)
• Nonconforming structures—historic exception: § 13.10.262(A)(5)(a). (§ 13.10.262)
• Historic identification plaques: § 13.10.586. (§ 13.10.586.)
• Historic nonconforming signs: § 13.10.585. (§ 13.10.585.)
• Coastal special community historic listings: § 13.20.143, § 13.20.144, § 13.20.145. (§ 13.20.143)
• SB 9 two‑unit ineligibility on County historic properties/districts: § 13.10.327(C)(3)(b). (§ 13.10.327)
• ADUs on historic parcels—ministerial vs. discretionary: § 13.10.681(F)(2). (§ 13.10.681)
• Design review framework: § 13.11.010. (§ 13.11.010.)
• Coastal Zone regulations precedence and scope: § 13.20.020. (§ 13.20.020.)
• SantaCruzCounty_ZoningCode.md

• Official Santa Cruz County code library