Local zoning · Red Bluff

Red Bluff — Historic Preservation

Q: What are the setback and lot-size requirements for the **HR** district?

The residential lot standards table in § 25.53 lists HR minimums: typical side yard 5 ft , street side 8 ft , rear 10 ft , normal lot area 5,750 sq ft , lot width 50 ft ; use the table for your parcel’s exact values. § 25.53 .

Q: What can I build on an **HC** lot downtown?

Uses listed in the H‑C column of the commercial use table ( § 25.79 ) are permitted per that table; dimensional rules for downtown are in the commercial standards table ( § 25.80 ) which allows very small lot widths, no front setback, high coverage (up to 100% ) and up to 50 ft in height. § 25.79 , § 25.80 .

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

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Last reviewed: July 2, 2026

Overview

Red Bluff’s zoning code embeds historic-preservation policy primarily by creating targeted historic districts (residential and commercial) and by requiring design-review compliance for development within those districts. The municipal code establishes HR (Historic Residential) and HC (Historic Commercial) districts, ties their permitted uses and dimensional standards to the zoning tables, and references separate Historic Design Review Guidelines adopted by council resolution for architectural/streetscape decisions. Key procedural details (landmark designation, formal local register, demolition-delay rules) are not contained in the retrieved zoning chapters. See the district rules and design-review triggers below for what the zoning code actually requires.

What the code says, district by district

HR — Historic Residential District (where applied)

Purpose: to protect “historically significant residences and buildings” and to apply a residential zoning regime appropriate to older neighborhoods; intended for areas designated “R‑M” on the General Plan land-use map. § 25.06.13.
Typical permitted uses: uses listed under the HR column of the residential permit table; consult § 25.52 for the permit list and for when a CUP/AUP is required. § 25.06.13, § 25.52.
Key dimensional standards (selected; full table at § 25.53): front yard typically set by the table entry for HR, side yard 5 ft, street side yard 8 ft, rear yard 10 ft; minimum lot area 5,750 sq ft (normal lot), lot width 50 ft, maximum height 45 ft, maximum building coverage 60%, minimum landscaped area 25%. See § 25.53 for the complete chart.
Where it applies: applied to parcels mapped as HR on the zoning map; boundaries are on the adopted zoning map (zoning-map rules in § 25.13). § 25.02.1, § 25.13.
Design-review requirement: all development proposed in HR districts must comply with the City’s design-review guidelines adopted by council resolution (see § 25.06.28 and Chapter 7 implementing rules). § 25.06.28.

Practical guidance: Expect an architectural / materials / streetscape review for additions, new primary buildings, and many accessory projects; be prepared to show how changes preserve character-defining features. For dimensional specifics and parking requirements, use the residential lot standards table at § 25.53 and off-street rules in Article XXIII. § 25.53, Article XXIII.

HC — Historic Commercial District (downtown core)

Purpose: to protect the “unique commercial, architectural, historic and aesthetic value” of the downtown core; intended for properties designated “C” on the General Plan land‑use map. § 25.08.11.
Typical permitted uses: uses under the H‑C column in the commercial permit table; see § 25.79 for the use matrix and how temporary/commercial accessory uses are handled. § 25.08.11, § 25.79.
Key dimensional standards (selected; full table at § 25.80): front yard: None, side yard: None, lot area minimum: 2,875 sq ft, lot width: 25 ft, building coverage: up to 100%, maximum height: 50 ft, parking and loading requirements are use‑driven in Article XXIII. See § 25.80 (commercial lot standards). § 25.80.
Where it applies: parcels zoned HC on the zoning map; commercial development in the downtown core is also subject to the design-review guidelines referenced for commercial districts. § 25.08.11, § 25.08.30.
Design-review requirement: “Unless specifically exempted, all development proposals for commercial districts shall comply with the design review guidelines.” § 25.08.30.

Practical guidance: Downtown projects often have 0 setbacks and high building coverage — the planning review will focus on façade treatment, signage, pedestrian improvements, and streetscape details under the Historic Design Review Guidelines. Check parking impacts under the parking rules and bring a streetscape/landscape plan. § 25.80, Article XXIII.

Quick comparison table (most decision-relevant standards)

Topic	HR (Historic Residential)	HC (Historic Commercial)	Code Reference
Minimum lot area (normal)	5,750 sq ft	2,875 sq ft	§ 25.53, § 25.80
Front setback	Table entry (varies; see § 25.53)	None	§ 25.53, § 25.80
Side setback (minimum)	5 ft	None (notes may apply)	§ 25.53, § 25.80
Height limit	45 ft (HR)	50 ft (HC)	§ 25.53, § 25.80
Building coverage	60%	100% allowed	§ 25.53, § 25.80
Design review	Mandatory for HR and for commercial districts unless exempted	Mandatory for HC unless exempted	§ 25.06.28, § 25.08.30
Parking	Use-driven; consult Article XXIII	Use-driven; consult Article XXIII	Article XXIII (see § 25.47, § 25.74)

How the review process interacts with historic rules (practical synthesis)

Design-review is the routine mechanism the city uses to protect historic character: the zoning chapters require compliance with the Historic Design Review Guidelines by resolution for HR and for commercial districts — that means most building-envelope and façade changes in HR and HC will undergo discretionary design review or an objective check against those guidelines. § 25.06.28, § 25.08.30.
Dimensional relaxations (setback adjustments, variances) are available but require findings and (often) public hearings. If strict standards preclude reasonable preservation work, you can pursue a setback adjustment under the criteria in § 25.157–§ 25.160 or a variance under Article XV — but expect the City to require findings that the change won’t harm neighborhood character or safety. § 25.157, § 25.150.
Parking, signage, and landscape are governed by the usual zoning and off‑street standards but with specific notes that downtown landscaping and streetscape improvements should be “consistent with Historic Design Review Guidelines” (see § 25.80 notes). § 25.80.

To prepare a complete submittal you should bundle: plans showing compliance with § 25.53/§ 25.80 dimensional rules, a design‑review narrative showing consistency with the Historic Design Review Guidelines, a parking analysis per Article XXIII, and any justification for adjustments/variances per Article XV/XVI. § 25.53, § 25.80, Article XXIII, Article XV/XVI.

Checklist

Confirm the parcel’s zoning and whether it is mapped HR or HC (zoning map; § 25.13).
Meet the dimensional standards in the residential or commercial lot tables (§ 25.53 or § 25.80) — lot area, setbacks, height, coverage.
Prepare off‑street parking plan per Article XXIII and show compliance with § 25.47/§ 25.74.
Produce a design-review package addressing the Historic Design Review Guidelines (required for HR and HC) and reference § 25.06.28 / § 25.08.30. Link to the design review page for local procedures.
If proposing deviations (setback/variance), file under Article XVI or Article XV with required findings and public-notice steps. § 25.157–§ 25.160, § 25.150.
For signage or streetscape changes, check city sign rules and the commercial landscaping notes tied to the Historic Design Review Guidelines; reference § 25.06.27, § 25.08.28, § 25.80 note.
Verify any building-code exceptions for qualified historic structures (State Historic Building Code or CHBC) with building department — see references to building-code exceptions in § 25.80 notes and consult the California Building Standards Code. § 25.80 note; verify with the jurisdiction.

Risks & Ambiguities

Issue	Why it matters	What to verify
Local landmark/individual-property designation process	The zoning code defines HR/HC and requires design review, but it does not provide a local landmark or formal local historic‑register procedure in the retrieved materials — without a formal program, protections and demolition‑delay rules may be elsewhere.	Verify with the Community Development Department or municipal Historic Preservation resolution whether the city maintains a local landmark designation procedure or separate preservation ordinance. Not found in retrieved materials.
Text of the Historic Design Review Guidelines	The zoning code references design‑review guidelines adopted by resolution (Chapter 7) but the guideline document text is not in the retrieved code excerpts. Review decisions will rely on that guideline text.	Obtain the Historic Design Review Guidelines (Council resolution / Chapter 7) from the Planning Department; confirm objective standards for ADUs, paint, signage. Not found in retrieved materials.
Applicability of State Historic Building Code / exceptions	Some commercial/residential table notes reference the State or Uniform Building Code exceptions for historic structures; how these are applied parcel‑by‑parcel is a building‑department determination.	Confirm with Building Division whether a property qualifies for CHBC treatment and how seismic/fire code exceptions interact with zoning § 25.80 note 8.
ADU rules inside historic districts	State ADU law permits ADUs in historic districts but the local implementation (objective standards, review path) is not contained in the retrieved zoning text.	Verify the city’s ADU ordinance for special standards affecting properties in HR/HC and whether design review applies to ADUs. Check ADUs and state ADU law. Not found in retrieved materials.
Which projects are “exempt” from design review	Code says “unless specifically exempted” but does not list exemptions in the retrieved snippets — whether minor repairs, in‑kind replacements, or emergency work are exempt is material to timing.	Request the exemption list in the Design Review guidelines or Chapter 7 implementing rules. Not found in retrieved materials.

Plain-English Summary

If your property is inside Red Bluff’s HR or HC districts, you must build to the dimensional tables in § 25.53 or § 25.80, and your project will generally be reviewed under the city’s Historic Design Review Guidelines (adopted by council resolution) — expect scrutiny of style, materials, and streetscape details; for any deviations use the setback‑adjustment or variance processes and follow the public‑notice rules.

Source References

Zoning district list and definitions (including HR, HC): § 25.02.1.
Historic Residential district purpose and design-review trigger: § 25.06.13, § 25.06.28.
Residential lot standards, including the HR column (setbacks, lot area, height, coverage): § 25.53.
Historic Commercial district purpose and commercial design-review requirement: § 25.08.11, § 25.08.30.
Commercial lot standards table (HC values): § 25.80 / § 25.08.40.
Off‑street parking references and cross‑citation to Article XXIII: § 25.47, § 25.74, Article XXIII.
Variances and setback adjustments (procedures and findings): Article XV (§ 25.150 ff.) and Article XVI (§ 25.157 ff.).
Zoning-map adoption / boundaries: § 25.13.
Notes referencing building-code exceptions for historic structures (State/UBC): notes to § 25.80 table.
For procedural design-review materials and the actual guideline text: “Design Review Guidelines” (adopted by City Council resolution; guideline text not included in retrieved excerpts). Not found in retrieved materials.

Also consult the following GoCodebook pages for related municipal procedures and cross‑checks while preparing applications: Red Bluff Zoning, Red Bluff Development Standards, Red Bluff Parking, Red Bluff Design Review, Red Bluff Overlay Districts, Red Bluff ADUs, Red Bluff Signage, Red Bluff Variances and Exceptions, and the California Building Standards Code.

Sources

Retrieved passages

Red Bluff Zoning Code (§ 25.01.10) Medium relevance
Red Bluff Zoning Code (§ 25.192) Medium relevance
CMC § 622 Medium relevance
Red Bluff Zoning Code (§ 25.6) Medium relevance
CPC § 300 Medium relevance
Red Bluff Zoning Code (§ 25.239) Medium relevance
CBC § 25.80 (§ 25.80) Medium relevance
Red Bluff Zoning Code (§ 25.52) High relevance
CBC § 25.79 (Article XXIII.) Medium relevance
CBC § 25.80 (§ 25.80) Medium relevance
Red Bluff Zoning Code (§ 25.15.3) Medium relevance
Red Bluff Zoning Code (§ 25.15.3) Medium relevance
Red Bluff Zoning Code (§ 25.01.13) Medium relevance
Red Bluff Zoning Code (§ 25.29) Medium relevance
Red Bluff Zoning Code (§ 25.31) Medium relevance
CBC § 25.16.1 (§ 25.16.1) Medium relevance
Red Bluff Zoning Code (§ 65915) Medium relevance
Red Bluff Zoning Code (§ 25.53) Medium relevance

Cited sections

Official Red Bluff code library

Frequently asked questions

What is allowed in an **HR** lot in Red Bluff?

Permitted uses are those listed under the HR column of the residential use table; residential standards (setbacks, lot area, height, coverage) follow the HR column in § 25.53, and design review applies to all development in HR. See § 25.52 and § 25.53.

What are the setback and lot-size requirements for the **HR** district?

The residential lot standards table in § 25.53 lists HR minimums: typical side yard 5 ft, street side 8 ft, rear 10 ft, normal lot area 5,750 sq ft, lot width 50 ft; use the table for your parcel’s exact values. § 25.53.

What can I build on an **HC** lot downtown?

Uses listed in the H‑C column of the commercial use table (§ 25.79) are permitted per that table; dimensional rules for downtown are in the commercial standards table (§ 25.80) which allows very small lot widths, no front setback, high coverage (up to 100%) and up to 50 ft in height. § 25.79, § 25.80.

Do I need design review for work on a historic district building?

Yes — the code requires compliance with the City’s design‑review guidelines for all development in HR districts and for commercial districts unless specifically exempted (see § 25.06.28 and § 25.08.30). Obtain the guidelines to know the specific application materials required.

Can I get a setback or coverage variance to preserve a historic building?

Possibly. Setback adjustments (Article XVI) and variances (Article XV) exist; both require findings and usually public hearings. The Planning Commission and/or City Council must find that standards would cause undue hardship and that the variance is compatible with the chapter’s purposes. § 25.157 ff.; § 25.150 ff.

Are there special parking rules downtown for historic buildings?

Parking requirements remain “use‑driven” and are located in Article XXIII; the HC table notes that parking and loading are determined by use and that adjacent street landscaping should align with the Historic Design Review Guidelines. § 25.80, Article XXIII.

Is there a local process to formally designate a single building as a landmark in Red Bluff?

Not found in the retrieved zoning chapters. The code sets aside HR and HC districts and requires design review, but a standalone local landmark designation procedure or local historic register is not present in the retrieved materials — verify with the Planning Department. Not found in retrieved materials.

How do State historic-building rules interact with Red Bluff zoning?

The zoning tables include notes referencing the Uniform/State Historic Building Code for exceptions; however, application of the State Historic Building Code (CHBC) is handled at the building‑permit stage — confirm qualification and applicable exceptions with the Building Division and reference the California Building Standards Code. § 25.80 note; verify with jurisdiction.

Are ADUs allowed in historic districts?

State law allows ADUs in historic districts, but the local ADU ordinance and the design-review guidelines control how ADUs are reviewed in Red Bluff. The zoning code references design-review applicability to HR; local ADU-specific objective standards were not contained in the retrieved excerpts — confirm with the city’s ADU rules. Not found in retrieved materials.

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