San Diego — Historic Preservation

Last reviewed: July 2, 2026

Overview

San Diego’s land-use regulations embed historic preservation as a formal designation and review process inside the Land Development Code (Title 11–13/Chapter 12 of the Municipal Code). Designation and protection are administered by the Historical Resources Board; preservation affects which development permit is required (Neighborhood Development Permit or Site Development Permit), what findings must be made, and—in some cases—development incentives and maximums (for example, floor area ratios) that may not be increased for properties in historic districts. See the City’s zoning overview for context at the San Diego zoning & planning overview.

What the code says — core rules & where to find them

• Designation: the City uses a formal nomination/designation process to create a designated historical resource; nominations can come from the HRB, City Manager, City Council or the public and require a research report; owners must be noticed before the HRB hearing. See § 123.0202.

• Recordation / appeals / recission: after final designation the City must record the designation with the County Recorder within 90 days (§ 123.0204); the HRB decision is appealable to City Council per § 123.0203; the HRB may amend or rescind a designation under the same procedure (§ 123.0205).

• Who decides: the Historical Resources Board (11 members) is established by the Municipal Code and must be multidisciplinary; the Board identifies and designates resources and reviews development proposals affecting designated resources (§ 111.0206).

• Permit triggers and processing:

  • Many routine projects on previously conforming sites use ministerial or simple discretionary processes, but where historic resources are present the Code requires different permit types and extra findings. See § 126.0401–§ 126.0404 for Neighborhood Development Permit (NDP) rules.
  • An NDP is specifically required where a project contains a designated historical resource (or contributing resource) and includes a historic-preservation development incentive as described in Section 143.0240; when that applies the decision maker must make the standard NDP findings and additional supplemental findings for historic resources (§ 126.0402(o) and § 126.0404).
  • For larger/sensitive projects a Site Development Permit is required; when deviations (relocation, substantial alteration, or new construction within a historic district) are requested the decision maker must make the supplemental historic‑resource findings in addition to the standard Site Development Permit findings (§ 126.0502, § 126.0505 and the supplemental findings in Division 6).

• Definitions: The Code defines designated historical resource broadly to include historical buildings, structures, objects, landscapes, important archaeological sites, traditional cultural properties, and historic districts that have been designated by the HRB or that are on state/federal registers. See the Land Development Code definitions (Definitions Division) for the precise wording.

• Floor area and development limits: the Code contains a bright‑line restriction: for development within a historic district or on a property listed on the State Historic Resources Inventory, “the maximum floor area ratio shall not increase.” See § 131.0444 (development regulations referencing historic districts and FAR limits).

• Abatement and emergency actions: designated historical resources cannot be substantially altered/demolished/relocated as part of an abatement action without first obtaining an NDP or Site Development Permit (§ 121.0419).

• Standards & guidelines: the HRB adopts specific guidelines used to evaluate designation and development proposals; the Land Development Manual includes Historical Resources Guidelines and submittal requirements that are referenced in the Code and used during reviews (see the Land Development Manual notice in § 111.0107).

• State code interactions: projects involving qualified historical buildings may use the California Historical Building Code (Part 8 / Title 24) alternatives; the City applies the CHBC in cooperation with local enforcement as appropriate. See the California Historical Building Code for technical building-code relief for historic properties.

Notes on wording in the Code: the ordinance consistently treats historic designation as a separate status layered on top of whatever base zone applies; base‑zone uses and most dimensional standards still apply unless the Code or a specific permit requires a deviation or imposes a restriction (see § 132.0104 and § 131.0444).

District-by-district breakdown (where preservation rules interact with zones / overlays)

The Land Development Code applies base-zone regulations plus overlays. Below are San Diego-specific districts/overlays that the Code explicitly links to historic‑resource rules; each subsection states the Code purpose, typical uses, the preservation-specific rules that affect that district, and where it applies.

Historical district (designated by the Historical Resources Board)

• Purpose: Protect and preserve concentrations of historically/significant resources identified by the Historical Resources Board. See the designation procedures in § 123.0201–§ 123.0206.
• Typical permitted uses: Uses continue to be those of the underlying base zone; designation does not itself rezone the property but triggers special review and permit requirements for development and alterations (HRB review, permit findings). See § 111.0206 and the permit divisions.
• Key dimensional / regulatory impacts: The Code prohibits increasing the maximum floor area ratio (FAR) for development within a historic district or a property on the State Historic Resources Inventory (§ 131.0444). Projects proposing relocation, substantial alteration, or new construction in a historic district require supplemental findings for Site Development Permits (§ 126.0505(i)).
• Where it applies: Any area the HRB designates; HRB maintains the City register of designated resources and the City must record designations within 90 days (§ 123.0204).

Community Plan Implementation Overlay Zone (CPIOZ) — example: Sherman Heights / Grant Hill

• Purpose: overlays that implement community plan policies; the CPIOZ maps identify areas where supplemental rules apply (the Code’s CPIOZ mapping specifically calls out Sherman Heights and Grant Hill Historic Districts in the list of community plan areas). See Table references in Division 14 (CPIOZ mapping).
• Typical permitted uses: Uses remain those of the underlying base zones; where the CPIOZ requires, projects must comply with additional community‑specific standards or obtain the permits identified in Table 132‑14B.
• Key preservation impacts: CPIOZ areas can include historic districts that require HRB review and additional submittals per the Land Development Manual; when CPIOZ maps identify special rules, the HRB’s designations and recommendations are required prior to certain decisions (§ 126.0504(b)(2)).
• Where it applies: See the Official Zoning Map and Table 132‑14B for community‑specific applicability; Sherman Heights and Grant Hill appear in the CPIOZ mapping tables.

Coastal Overlay Zone (COZ)

• Purpose: protect Coastal resources; the Code applies COZ supplemental regulations where base zones and overlays interact. See § 132.0102–132.0104.
• Typical permitted uses: Governed by base zone plus COZ adjustments; coastal development permits and HRB designations can overlap.
• Key preservation impacts: Historic resources in the COZ are still subject to HRB designation procedures and the City’s historical resources guidelines; some amendments or incentives adopted citywide may not apply in the COZ until Coastal Commission certification (editor’s notes in the ordinance). When a historic resource lies in the COZ, compliance must also track Local Coastal Program requirements—verify with Coastal staff.

Base residential and mixed‑use zones (example: R-1, RM, RX, RT)

• Purpose: regulate allowed uses, setbacks, height, FAR, lot coverage for residential types (see Chapter 13 development tables).
• Typical permitted uses: single‑family in R‑1, multi‑unit in RM, mixed/residential with commercial in RX/RT; specific use tables in Chapter 13 apply to each zone.
• Key preservation impacts: A designation by HRB does not change the base‑zone uses automatically, but any proposed enlargement, relocation, demolition, or substantial alteration may require an NDP or Site Development Permit and HRB recommendation; FAR increases are specifically prohibited within historic districts (§ 131.0444). Also, previously‑conforming structure rules (Chapter 12/Article 7) control how reconstruct/alteration is processed for older buildings (§ 127.0104).

Note: The Code is structured so the applicable base zone’s dimensional rules remain in force; historic resource status typically adds procedural requirements (HRB recommendation, special findings, and limits such as the FAR rule) rather than creating a new base‑zone dimensional schedule. See the Development Standards and the base zone tables for numerical setbacks, heights, and FARs in Chapter 13.

Quick standards & decision‑relevant table

Practical guidance (plain‑English synthesis)

• If your property is on or might be on the HRB register, plan for extra time and documentation: research report for designation nominations, HRB hearings, and possible City Council appeal windows (see § 123.0202–§ 123.0204).
• Do not expect to trade historic status for bigger massing: the Code explicitly prevents increasing FAR on historic sites/districts (§ 131.0444); if your project needs FAR relief you will face a strong headwind.
• Expect the HRB to use the Land Development Manual Historical Resources Guidelines for submittal content and review criteria; early consultation reduces surprises. See the Land Development Manual guidance incorporated by reference in the Code (§ 111.0107).
• When a project proposes to relocate, substantially alter, or use development incentives related to historic preservation, the decision maker must make supplemental findings addressing avoidance, mitigation, minimum deviation, and hardship; these are discretionary decisions — plan for Process Three/Four/ Five timing and possible appeals (§ 126.0505).
• If the project is primarily an ADU or small alteration, state ADU law allows ADUs in historic districts but local objective standards that prevent adverse impacts can be applied; check the City ADU rules and state ADU law together. See ADU guidance for interplay with historic resources.

Links you may need while preparing applications: first consult the San Diego zoning & planning overview and the City's San Diego Design Review and Development Standards pages; parking and ADU rules can also be relevant depending on the project. The Code lets the underlying base zone rules (setbacks, height, parking) apply, so consult the Development Standards for numeric dimensions and parking requirements. (Examples: San Diego Development Standards, San Diego Design Review, San Diego Parking, San Diego ADUs, and the California Building Standards Code for CHBC/Title 24 context.) ment pages to consult while planning: San Diego zoning & planning overview, San Diego Zoning, San Diego Development Standards, San Diego Design Review, San Diego Parking, San Diego Overlay Districts, San Diego ADUs, and the California Building Standards Code.

Checklist (what an applicant must satisfy before filing)

• Confirm whether the property is a designated historical resource or contributor to a historical district (HRB register; designation recorded per § 123.0204)
• If the property is not yet designated but may be, prepare a research report consistent with the Historical Resources Guidelines in the Land Development Manual and expect HRB review (§ 123.0202).
• Determine the correct permit: NDP versus Site Development Permit (NDP required where historic preservation development incentives are used; Site Dev Permit required for substantial alteration/relocation) (§ 126.0402(o); § 126.0502).
• Prepare the supplemental findings and mitigation plan required for historic resources (avoidance, minimum deviation, mitigation, Secretary of the Interior Standards where specified) (§ 126.0404, § 126.0505).
• Confirm FAR and other dimensional limits — the Code prohibits increasing maximum FAR for development within a historic district or on State‑listed properties (§ 131.0444).
• If claiming CHBC/Title 24 alternatives, prepare documentation showing qualified historical status and intended CHBC provisions (CHBC guidance applies; see Title 24 Part 8).
• Check for required HRB recommendation timing (HRB recommendations are required before certain Planning Commission/City decisions) and allow time for appeals (§ 126.0504(b)(2); § 123.0203).

Risks & Ambiguities

Information Gaps (items not confirmed in the retrieved materials)

• The full text and specific mechanics of § 143.0240 (the “historic preservation development incentive”) were referenced repeatedly but the ordinance language for that section did not appear in the retrieved excerpts. Verify the full text of § 143.0240 with the City’s online Code or Planning staff. Not found in retrieved materials.
• Any community‑or site‑specific HRB guidelines or a particular district’s adopted design guidelines (these live in the Land Development Manual and HRB resolutions) beyond the Code references — consult the Land Development Manual (Historical Resources Guidelines) and HRB staff.

Plain-English Summary

If your San Diego property is designated (or could be designated) as a historic resource, the Historical Resources Board (HRB) and the Land Development Code add procedural steps, required findings, and limits (for example, you cannot increase FAR within a historic district). Expect HRB review, possible Neighborhood Development or Site Development Permit requirements, and specific findings that require avoidance, mitigation, or demonstration that a deviation is the minimum necessary. Consult the HRB, the Land Development Manual Historical Resources Guidelines, and the Code sections cited before finalizing plans.

Source References

• § 123.0201–§ 123.0206 (Designation procedures; recordation; amendment/recision) —
• § 123.0203 (Appeals from HRB decision) —
• § 111.0206 (Historical Resources Board — composition, powers, duties) —
• § 126.0401–§ 126.0406 (Neighborhood Development Permit procedures and findings) —
• § 126.0501–§ 126.0505 (Site Development Permit procedures and supplemental historic findings) —
• § 121.0419 (Special procedures for abatement actions involving designated historical resources) —
• § 127.0104 (Previously conforming structures rules) —
• § 131.0444 (FAR / development regulations referencing historic districts — “maximum floor area ratio shall not increase”) —
• § 132.0101–§ 132.0104 (Overlay zone rules; applicability of base zone in overlays) —
• Land Development Manual (Historical Resources Guidelines referenced by the Code via § 111.0107) —
• California Historical Building Code (CHBC) / Title 24 (state code relief for qualified historical buildings) —
• ADU guidance re historic resources and state law (California ADU handbook) —

Retrieved passages

• San Diego Zoning Code (§123.0111) High relevance show source text
• CMC § 622 High relevance show source text
• San Diego Zoning Code (Chapter 12) High relevance show source text
• San Diego Zoning Code (Section 143.1403) High relevance show source text
• San Diego Zoning Code (Chapter 11) High relevance show source text
• CBC § 18955 (Section 18955) High relevance show source text
• CBC § 143.0210 (Section 143.0210) High relevance show source text
• San Diego Zoning Code (Section 143.0915) Medium relevance show source text
• San Diego Zoning Code (Chapter 12) High relevance show source text
• San Diego Zoning Code (Section 143.0210) High relevance show source text
• CBC § 132.1515 (Section 132.1515) High relevance show source text
• San Diego Zoning Code (Section 143.0210) High relevance show source text
• San Diego Zoning Code (§111.0206) High relevance show source text
• CBC § 142.0555 (Section 142.0555) Medium relevance show source text
• San Diego Zoning Code (Chapter 11) Medium relevance show source text
• San Diego Zoning Code (Section 131.0464) Medium relevance show source text
• San Diego Zoning Code (Chapter 12) Medium relevance show source text
• San Diego Zoning Code (Section 127.0105) Medium relevance show source text
• San Diego Zoning Code (§126.0403) Medium relevance show source text
• San Diego Zoning Code (§111.0204) Medium relevance show source text
• San Diego Zoning Code (Section 131.0443) Medium relevance show source text
• San Diego Zoning Code (Chapter 13) Medium relevance show source text
• San Diego Zoning Code (Chapter 11) Medium relevance show source text
• San Diego Zoning Code (Section 141.0606) Medium relevance show source text
• CBC § 132.0505 (Chapter 13) Medium relevance show source text
• San Diego Zoning Code (Section 131.0443) Medium relevance show source text

Cited sections

• § 123.0201–§ 123.0206 (Designation procedures; recordation; amendment/recision) — (§ 123.0201)
• § 123.0203 (Appeals from HRB decision) — (§ 123.0203)
• § 111.0206 (Historical Resources Board — composition, powers, duties) — (§ 111.0206)
• § 126.0401–§ 126.0406 (Neighborhood Development Permit procedures and findings) — (§ 126.0401)
• § 126.0501–§ 126.0505 (Site Development Permit procedures and supplemental historic findings) — (§ 126.0501)
• § 121.0419 (Special procedures for abatement actions involving designated historical resources) — (§ 121.0419)
• § 127.0104 (Previously conforming structures rules) — (§ 127.0104)
• § 131.0444 (FAR / development regulations referencing historic districts — “maximum floor area ratio shall not increase”) — (§ 131.0444)
• § 132.0101–§ 132.0104 (Overlay zone rules; applicability of base zone in overlays) — (§ 132.0101)
• Land Development Manual (Historical Resources Guidelines referenced by the Code via § 111.0107) — (§ 111.0107)
• California Historical Building Code (CHBC) / Title 24 (state code relief for qualified historical buildings) — (Title 24)
• ADU guidance re historic resources and state law (California ADU handbook) —
• SanDiego_ZoningCode.md
• 2025 California Historical Building Code.md
• 2025 California ADU handbook.md

• Official San Diego code library