Sunnyvale — Historic Preservation

Last reviewed: July 2, 2026

Overview

Sunnyvale's historic preservation rules are codified in the city's zoning code (commonly Title 19) under the Heritage Preservation chapter. The ordinance establishes a Heritage Preservation Commission, criteria and procedures for designating heritage resources, local landmarks, and heritage/resource districts, and a permit/review regime that controls exterior work, demolition, relocation and changes of use for designated properties. Key authorities and procedural rules appear in § 19.96.010–§ 19.96.160 and the related combining-district rules for HH heritage housing, among other sections .

How the ordinance is structured (quick map)

• Purpose and findings: § 19.96.010 (heritage preservation goals)
• Commission: § 19.96.020–§ 19.96.030 (heritage preservation commission duties)
• Criteria for designation: § 19.96.050 (NRHP criteria + local criteria)
• Designation procedure: § 19.96.060 (public hearings, notices)
• Permit/review rules for landmarks/resources: § 19.96.090, § 19.96.095, § 19.96.100 (alteration permits, inventoried-structure demolition notices)
• Ranking of significance (Local landmark → Designated heritage resource → Heritage resource): § 19.96.065
• Heritage-housing combining district (HH): § 19.26.060–§ 19.26.080 (purpose, demolition/replacement rules)

Note: the city integrates these rules with general application procedures in Chapter 19.98 and other chapters referenced in the heritage chapter .

District-by-district breakdown (what matters to applicants)

Local Landmark / Local Landmark Resource

• Purpose: Protect individual properties judged to "materially benefit the historical character" of Sunnyvale; designation made by the city council after HPC recommendation § 19.96.060 and defined in § 19.96.040 .
• Typical permitted uses: Uses otherwise allowed by the underlying zoning remain in force; however, any change of use or introduction of multiple residential units in a landmark or landmark district requires a special development permit first § 19.96.070 .
• Key review/dimensional rules: Any material exterior change, demolition, relocation or construction affecting a landmark requires a landmark alteration permit and a public hearing before the Heritage Preservation Commission § 19.96.090 . Reconstruction "as originally constructed" can be exempted from setback and height limits; additions may obtain exceptions if the Commission makes the findings in § 19.96.080 .
• Where it applies: To individually designated properties listed on the city's Local Register of Heritage Resources (designation by council) § 19.96.060 .

Designated Heritage Resource / Designated Heritage Resource District

• Purpose: Resources recognized at the city level and also by state/federal registers; highest-ranked category after local landmark in the city's ranking § 19.96.065 .
• Typical permitted uses: Underlying zoning controls uses; but alterations/demolition require a resource alteration permit and compliance with state or federal requirements where applicable § 19.96.065(b) .
• Key review: Resource alteration permit and HPC review required before material exterior changes § 19.96.095 .
• Where it applies: Properties recognized by city and state/federal registers, as listed on Local Register or state/federal lists § 19.96.065 .

Heritage Resource / Heritage Resource District

• Purpose: Preserve broader categories of historically/significant places, views, landscapes, groups of properties § 19.96.050 .
• Typical permitted uses: Underlying zone uses apply; exterior work that materially changes appearance is subject to HPC review and a resource alteration permit § 19.96.095 . Minor modifications may be processed through staff-level miscellaneous plan permits, but appeals go to the HPC (see § 19.82.030(a) cross-reference) .
• Key review/dimensional standards: Same permit requirement for material exterior changes; exceptions for reconstruction/additions may be made by the HPC under the findings listed in § 19.96.080 .
• Where it applies: Geographically definable areas designated by city council as heritage resource districts § 19.96.060 .

Heritage Housing Combining District — HH

• Purpose: A combining district applied to residential areas to "preserve, protect, enhance and perpetuate the appearance of certain historic residential neighborhoods" § 19.26.060 .
• Typical permitted uses: Underlying residential zoning remains; the HH combining district layers additional demolition/replacement controls and policy-based design expectations (policy statements for each HH district) § 19.26.060 .
• Key dimensional/administrative standards: Demolition of a residential structure in an HH district requires HPC approval via public hearing (findings include whether demolition will adversely impact historic character and whether replacement plans are consistent with district policy); when demolition is allowed under findings, a building permit for replacement may be required before demolition § 19.26.080 . Exceptions to normal permitting may also be available in reconstruction circumstances under § 19.96.080 .
• Where it applies: Only on residential properties explicitly zoned with the HH combining district § 19.26.060 .

Decision‑relevant standards and permits (quick table)

How this interacts with other local rules (practical notes)

• Dimensional standards and development standards (setbacks, height, coverage) remain in the underlying zone and the city's Sunnyvale Development Standards apply, except where the heritage rules explicitly allow exceptions for reconstruction/additions under § 19.96.080 .
• Parking requirements for a project on a designated property remain governed by Sunnyvale's parking rules; however, planning‑level relief or special permits may be necessary where preservation constraints make conformance difficult (verify with staff) .
• Minor exterior changes may be eligible for staff processing under the miscellaneous plan permit route (see cross‑reference to Chapter 19.82.030(a)) but appeals from those staff approvals go to the HPC rather than the Planning Commission § 19.96.095 .
• Work that requires building permits still must comply with the California Building Standards Code (Title 24) even if the HPC approves an alteration in principle; structural and life‑safety requirements are enforced by building inspection (verify with building staff). Not found in retrieved materials: specific Title 24 interactions beyond that reminder; verify with the building division.

Linking note: where the heritage rules cross‑reference other planning processes, applicants should consult the city's pages on design review, overlay districts, and ADUs as those processes may also apply to the same property.

Checklist (what an applicant for exterior work or designation must typically satisfy)

• Confirm whether the property is on the Local Register of Heritage Resources or otherwise designated (verify with Community Development) § 19.96.065
• If the work is a material exterior change, prepare and file a landmark alteration permit (landmarks) or resource alteration permit (heritage resources) application § 19.96.090
• Provide documentation to demonstrate how the proposal satisfies the chapter's purposes and will not be detrimental to heritage features (address criteria in § 19.96.050 and the needed findings in § 19.96.090(f))
• For designated or inventoried structures, plan for the demolition advertising and on‑site sign program if demolition is contemplated (60 days) § 19.96.100
• Where an HH district applies, prepare replacement plans consistent with the district policy statement before demolition will be approved § 19.26.080
• Expect a public hearing before the HPC for most alteration/demolition applications; prepare required public notice materials § 19.96.090 and Chapter 19.98 notice rules
• If relief from setbacks/height is needed, make clear why the § 19.96.080 findings apply (reconstruction as‑built or non‑detriment to character)
• Coordinate with building inspection for any permit triggers and Title 24 compliance (structural work, unsafe condition removals) § 19.96.110; verify with building division

Risks & Ambiguities

Information Gaps

• The uploaded materials establish the local heritage chapter and HH combining district rules, but do not contain: an up‑to‑date copy of the city's Local Register of Heritage Resources (parcel list), fee schedule for landmark/resource permit applications, or any local "policy statements" that guide HH district replacement design review. Verify with Sunnyvale DCD. Relevant designation procedures are in § 19.96.060 .
• The ordinance references staff processing under § 19.82.030(a) for minor modifications; the full text of § 19.82.030(a) and any application submittal checklist were not included in the retrieved snippets (verify with Chapter 19.82) .
• Specific monetary incentives, preservation easements, or local grant/loan programs are not present in the retrieved materials. Not found in retrieved materials — verify with the Heritage Preservation Commission staff and the city's web resources.

Plain-English Summary

If your Sunnyvale property is listed as a local landmark, heritage resource, or in a heritage district, most exterior work, demolition, relocation, or changes of use will require a special permit and review by the Heritage Preservation Commission; reconstruction and small repairs have limited exceptions, and demolition of inventoried structures needs a 60‑day relocation/removal advertising program § 19.96.090–§ 19.96.100 .

Source References

• Sunnyvale Zoning Code — Chapter 19.96 Heritage Preservation (purpose, commission, criteria, designation, alteration permits): § 19.96.010–§ 19.96.160, downloaded from eCode360 (City of Sunnyvale) . eCode360 base URL: https://ecode360.com/SU5020
• Heritage Preservation Commission duties and responsibilities: § 19.96.020–§ 19.96.030
• Criteria for evaluation and nomination of heritage resources: § 19.96.050
• Designation procedures (HPC → City Council; notices): § 19.96.060
• Ranking of heritage resources and alteration process: § 19.96.065
• Landmark alteration permit rules and findings: § 19.96.090
• Resource alteration permit rules (heritage resources): § 19.96.095
• Inventoried structures—notice prior to demolition: § 19.96.100
• Exceptions for reconstruction/additions; dimensional exceptions: § 19.96.080
• Heritage housing combining district (HH) purpose and demolition/replacement rules: § 19.26.060–§ 19.26.080
• Cross references to general procedures and public notice: Chapter 19.98 (application processing, public notice, appeals)

Retrieved passages

• Sunnyvale Zoning Code (Section 19.96.090.) High relevance show source text
• Sunnyvale Zoning Code (§ 19.80.085) High relevance show source text
• Sunnyvale Zoning Code (§ 19.96.010) High relevance show source text
• Sunnyvale Zoning Code (§ 19.80.060) High relevance show source text
• Sunnyvale Zoning Code (chapter and) High relevance show source text
• Sunnyvale Zoning Code (§ 19.20.330) High relevance show source text
• Sunnyvale Zoning Code (Section 19.96.090) High relevance show source text
• Sunnyvale Zoning Code (§ 19.96.030) High relevance show source text

Cited sections

• Sunnyvale Zoning Code — Chapter **19.96** Heritage Preservation (purpose, commission, criteria, designation, alteration permits): **§ 19.96.010–§ 19.96.160**, downloaded from eCode360 (City of Sunnyvale) . eCode360 base URL: (§ 19.96.010)
• Heritage Preservation Commission duties and responsibilities: **§ 19.96.020–§ 19.96.030** (§ 19.96.020)
• Criteria for evaluation and nomination of heritage resources: **§ 19.96.050** (§ 19.96.050)
• Designation procedures (HPC → City Council; notices): **§ 19.96.060** (§ 19.96.060)
• Ranking of heritage resources and alteration process: **§ 19.96.065** (§ 19.96.065)
• Landmark alteration permit rules and findings: **§ 19.96.090** (§ 19.96.090)
• Resource alteration permit rules (heritage resources): **§ 19.96.095** (§ 19.96.095)
• Inventoried structures—notice prior to demolition: **§ 19.96.100** (§ 19.96.100)
• Exceptions for reconstruction/additions; dimensional exceptions: **§ 19.96.080** (§ 19.96.080)
• Heritage housing combining district (**HH**) purpose and demolition/replacement rules: **§ 19.26.060–§ 19.26.080** (§ 19.26.060)
• Cross references to general procedures and public notice: Chapter **19.98** (application processing, public notice, appeals)
• Sunnyvale_ZoningCode.md

• Official Sunnyvale code library