Auburn Zoning, Planning & Building Codes

Last reviewed: July 1, 2026

Overview

Auburn regulates land use under Title XV: Land Use; its core Auburn Zoning rules are in Chapter 159, the “Zoning Law of the City of Auburn,” which applies citywide and implements the Auburn Area General Plan . The zoning map is adopted and maintained by the Planning Department and City Clerk, and any unzoned or newly annexed land defaults to the R-1 district until rezoned . Development standards (setbacks, height, coverage, parking) are organized by district in Appendix A to Chapter 159, with additional citywide standards in related subchapters and chapters of Title XV . Auburn also runs a formal Auburn Design Review program for commercial, multifamily, and projects in historic/design areas, and maintains subchapters for Auburn Parking, Auburn Signage, Auburn Historic Preservation, density bonus, and more .

How Auburn’s code is organized

• Title XV’s Chapter 159 is the zoning “hub.” It opens with general provisions and the Planning Commission’s interpretive powers and fee authority for development applications . The chapter then:
  • Establishes districts and the zoning map (159.015–.019), and sends all base dimensional rules to Appendix A via § 159.016 (“Height, Lot Width, Lot Frontage, Yards, Area Per Unit, Lot Area, Lot Coverage and Off-Street Parking”) .
  • Organizes use tables and special categories (e.g., manufactured/mobile homes, planned unit developments) in discrete subchapters, including Design Review (159.110–.125), Airport Zoning (159.140–.151), Auburn Parking (Off‑Street Parking & Loading, 159.165–.175), Auburn Signage (159.185–.198), Official Plan Lines (159.220–.229), Auburn Nonconforming Uses (159.240–.246), Second Residential Units/ADUs (159.325–.329), Residential Density Bonus (159.335–.342), Use Permits (159.405–.409), Auburn Variances and Exceptions (159.420–.426), Amendments/Notice/Enforcement, and Auburn Historic Preservation (159.490–.507) .
• Related Title XV chapters that commonly apply to development:
  • Chapter 158 (Subdivisions): design standards and tentative/final map procedures; the “Advisory Agency” approves tentative maps and parcel maps with appeal to Council . Tentative maps must show utilities, fire access/hydrants and proposed zoning/use; additional soils/geology data may be required, and filing fees are set by Council resolution .
  • Chapter 155 (Grading): grading permits must conform to the General Plan/specific plans and applicable ordinances; discretionary zoning approvals are required before grading permits issue .
  • Chapter 153 (Landscaping): citywide minimums and plant standards apply to site development (see “Citywide development standards,” below) .

Zoning district families

Auburn’s districts are created in § 159.015. The list below uses Auburn’s own names and abbreviations, including “combining” and design-control districts used as overlays or special areas :

• Residential: R‑1 (Single‑Family), R‑2 (Two‑Family/Duplex), R‑3 (Medium Density Multifamily), R‑4 (High Density Multifamily) .
• Commercial/Mixed: C‑1 (Neighborhood Commercial), C‑2A (Central Business‑A), C‑3 (Central Business), C‑3‑ES (Regional Commercial – Emergency Shelter), HS (Highway Service), OB (Office Building) .
• Industrial/Campus: M‑1 (Industrial Park), M‑2 (Industrial), AI‑DC (Airport Industrial Design Control) .
• Civic/Resource/Agricultural: S (Special Public Service), OSC (Open Space & Conservation), A‑1 (Exclusive Agricultural), AR (Agricultural Residential) .
• Design/History/Scenic: DC (Auburn Dam Overlook Civic Design Control), DH (Auburn Historic District) .
• Combining and special overlays: –5, –7, –8.5, –10, –15, –1A, –2A, –P (Combining Districts), and the Mineral Extraction Combining District (ME) at §§ 159.370–.377 .

District uses and any district‑specific exceptions live in the “Uses Permitted” subchapter (159.030–.047) and Appendix A (district regulations) . The adopted zoning map is part of the ordinance and is maintained by the Planning Department and City Clerk; newly annexed/unmapped land is R‑1 until rezoned (§§ 159.017–.018) .

Citywide development standards

• Where the numbers live. Base dimensional standards—setbacks, height, lot width/frontage, area per unit, lot area, lot coverage, and off‑street parking—are not repeated in the body of Chapter 159; they’re centralized in Appendix A and are applied by district via § 159.016 . Use this as your anchor to navigate district‑by‑district rules in Appendix A.
• Off‑street parking. The City’s parking ratios, stall dimensions, loading, and related rules are in §§ 159.165–.175. The code also restricts front‑yard parking placement; for example, bed‑and‑breakfasts must keep all required parking onsite and out of the required front yard, “pursuant to § 159.171” (a cross‑reference to the Off‑Street Parking subchapter) .
• Auburn Landscaping and Screening. At least 5% of the total parcel area must be landscaped, with minimum planting sizes (15‑gallon trees; 5‑gallon shrubs), curbed landscape islands, and average planting widths of 3 ft. Plant mix targets at least 50% evergreen trees/shrubs, and permanent irrigation is required (Ch. 153.06–.08) .
• Planned Unit Developments (citywide option). Auburn’s PUD subchapter sets intensity‑based standards for residential communities; for example, the table in § 159.083 fixes residential parking at 2 spaces per unit, requires open space ratios ranging from 70% (at 3 du/ac) to 35% (at ≥10 du/ac), and caps building coverage from 16% up to 30% as density increases. Related definitions for how to compute open space and coverage are in §§ 159.085–.086 .
• Auburn Signage. Sign regulations, permits, and enforcement are consolidated in §§ 159.185–.198 .
• Auburn Nonconforming Uses. Definitions and rules for uses/buildings that predate current zoning are in §§ 159.240–.246; “non‑conforming use” is defined in § 159.001 as a use lawful on February 7, 1967 but not conforming to current district regulations .

Specific plans & overlays

• Specific plans and the General Plan. While the zoning chapter is the primary regulatory source, Auburn’s Grading Code makes clear that permits must conform to the Auburn Area General Plan and “specific plans adopted thereto,” signaling that adopted specific/area plans can add site‑ or corridor‑specific standards that control permit approvals (§ 155.038(A)(1)) .
• Auburn Overlay Districts of note:
  • Airport Zoning (Ch. 159.140–.151). Height limits and air‑space protections apply near the airport; for example, structures/trees in transitional zones above certain heights can require permits, and any variance must include an FAA determination and may require obstruction marking/lighting (§ 159.148) .
  • Historic Design/Preservation. The code defines a “Historic Design Review District” (Downtown and Old Town districts and designated historic resources) with a dedicated Historic Design Review Commission (§ 159.112), and stand‑alone Historic Preservation regulations appear in §§ 159.490–.507 .
  • Combining districts and design control areas. Auburn employs combining districts such as ME (Mineral Extraction) with its own subchapter (159.370–.377), as well as design‑control districts like AI‑DC and DC established in § 159.015 for specialized industrial/visual controls; consult those subchapters/Appendix A and any mapped overlays for operative limits .
  • Official Plan Lines (159.220–.229) preserve future right‑of‑way corridors that can affect setbacks and access on affected parcels .

Building permits & review

• Zoning clearance and Auburn Design Review. Citywide design review is required for new commercial/office/industrial buildings and multifamily, and for substantial exterior remodels. A Design Review Permit (DRP) is triggered by: new buildings; >20% floor area additions or >2,500 sq ft; or substantial façade remodeling. Minor changes may be approved administratively by the Planning Director (e.g., smaller additions; minor exterior changes; modifications to an existing DRP) (§ 159.114; definitions and authorities in §§ 159.110–.113) .
• Use permits and variances. The Planning Commission can impose conditions and issue use permits for uses requiring them, including adjusting “height, lot width, lot frontage, yards, area per unit, lot area, lot coverage, and off‑street parking,” provided findings and plan consistency are met (§§ 159.405–.407). Use permits typically must be exercised within 24 months unless extended (§ 159.097). Variances and the amendment/hearing procedures are in §§ 159.420–.447 and 159.460–.464, respectively .
• Subdivision and public improvements. The “Advisory Agency” approves tentative maps and parcel maps (appeal to Council) with engineering review by the City Engineer (§§ 158.015–.018). Tentative maps must depict zoning/use statements, utilities, fire access/hydrants, and more; soils/geology reports and fees may be required (§§ 158.033–.036). Subdivision design and improvement standards are in §§ 158.225–.240, including incentives tied to “parkway” street designs that can support reduced building setbacks on a foot‑for‑foot basis where separated sidewalks are provided (§ 158.226) .
• Grading permits. Grading permits may be conditioned for environmental and safety protection and cannot precede required discretionary zoning approvals (§ 155.038). Coordination with other agencies and permits is required (§ 155.039) .
• Building code. Building permits are issued under the California Building Standards Code (Title 24). See the City’s DRP and zoning/use permit requirements above for discretionary layers that may precede building permit submittal.

State housing law in Auburn

• Auburn ADUs. Auburn implements state ADU/JADU law in §§ 159.325–.329 (repealed & replaced 11/14/2022). Local standards include:
  • A guaranteed path for at least one 800 sq ft, 16 ft-tall ADU with 4 ft side/rear setbacks if other standards would preclude it; minimum one off‑street ADU parking space unless state law waives it (§ 159.325–.329; local standards summarized below) .
  • Typical local ADU setbacks of 20 ft front and 4 ft sides/rear; 10 ft if a garage is attached to an ADU/JADU. Height generally limited to one story and 16 ft unless integrated into existing legal two‑story space, with consistency to Appendix A where applicable (§ 159.325–.329) .
  • Rear‑yard coverage for all accessory structures (including ADUs/JADUs) capped at 30% (§ 159.325–.329) .
  • State overlays you should know: current state ADU law limits local parking imposition and sets state‑wide ceilings on ADU heights (e.g., detached ADUs generally at 16–18 ft; attached up to 25 ft or the primary dwelling’s height if lower) and prohibits denial for minor zoning/building nonconformities unrelated to ADU work, among other provisions (Gov. Code §§ 66321–66336) .
• Density bonus. Auburn codifies a Residential Density Bonus program at §§ 159.335–.342; use this subchapter for local procedures and concessions consistent with state Density Bonus Law .
• SB 9 two‑unit/urban lot split and rent rules. Not found in retrieved materials as a stand‑alone Auburn ordinance; verify with the jurisdiction. For context on statewide requirements, see California housing laws.

Source References

• Chapter 159 “Zoning Law of the City of Auburn”; purpose/authority; Planning Commission powers; development application fees; district establishment; Appendix A reference; zoning map/unclassified land: §§ 159.002–.006, 159.015–.019, 159.016, 159.017–.018 .
• Zoning chapter structure: Uses Permitted; Design Review (159.110–.125); Airport Zoning (159.140–.151); Off‑Street Parking (159.165–.175); Signs (159.185–.198); Official Plan Lines (159.220–.229); Nonconforming Uses (159.240–.246); Second Units/ADUs (159.325–.329); Density Bonus (159.335–.342); Use Permits (159.405–.409); Variances (159.420–.426); Historic Preservation (159.490–.507) .
• Design Review triggers/authorities (DRP; administrative approvals; historic design review terms): §§ 159.110–.114 .
• Off‑Street Parking: 159.165–.175; front‑yard limitation cross‑reference via § 159.171 in B&B standards .
• Landscaping standards (Ch. 153.06–.08): planting sizes/mix; irrigation; minimum 5% landscaped area; maintenance/bonding .
• PUD standards: parking/open space/coverage table and related definitions: §§ 159.083–.087 .
• Airport Zoning permits/variances/marking-lighting: § 159.148 .
• Subdivisions: Advisory Agency roles; tentative map content; additional data; filing/fees; design standards; parkway incentives; street standards: §§ 158.015–.018, 158.033–.036, 158.225–.240 (esp. § 158.226) .
• Grading permits: conformance; sequencing with zoning approvals; interagency approvals: §§ 155.037–.041 (esp. § 155.038) .
• ADUs/JADUs: local program §§ 159.325–.329; local standards for minimum allowable ADU, setbacks, height, coverage, parking .
• State ADU preemptions (height/parking/setback minima; nonconformity limits), 2025 summary: Gov. Code §§ 66321–66336 .