Fairfax Zoning, Planning & Building Codes

Last reviewed: July 3, 2026

Overview

Fairfax’s land‑use and development rules are contained in Title 17 (the town’s Zoning Code) and are organized into zone chapters, citywide standards, and procedural chapters that together govern permitted uses, dimensional controls, and approvals. § 17.040 collects many of the citywide development standards (setbacks, lot coverage, and related rules) while zone‑specific chapters (for example, the RM and RM‑S residential chapters and the PDD chapter) set use lists and building/site rules. § 17.040.010 § 17.088.010 § 17.112.010

How Fairfax's code is organized

• The code groups rules by subject and by zone: citywide "General Zone Regulations" appear in CHAPTER 17.040 (lot coverage, setbacks, signage cross‑references), permitting and permit‑type rules are in permitting chapters such as § 17.024 (zoning and building permits), and zone‑by‑zone rules appear in individual chapters (e.g., CHAPTER 17.088: RM Multiple‑Family Residential, CHAPTER 17.090: RM‑S Senior Residential, CHAPTER 17.112: PDD Planned Development District). § 17.040.010 § 17.024.030 § 17.088.010 § 17.112.010
• Procedural and state‑law implementation chapters sit alongside zone chapters: the town added a Streamlined Ministerial Approval chapter to implement State streamlined housing review (Chapter 17.026) and an SB 330 procedures chapter (Chapter 17.027). § 17.026.010 § 17.027.060
• Waivers, exceptions, variances, and design review each have their own provisions so a reader can go to the procedural chapter for relief or discretionary review details (for example, waivers are in § 17.044.090–100, and design review criteria are in § 17.020.040). § 17.044.090 § 17.020.040

(For the town’s consolidated zoning navigation, see the Fairfax Zoning page and the town’s development‑standards menus linked below.) Fairfax Zoning Fairfax Development Standards

Zoning district families

Fairfax organizes districts into familiar families; below are the ones that appear in the local code and where they are defined:

• Residential districts
  • RM (Multiple‑Family Residential) — principal permitted uses and density rules are in § 17.088.020 and related building/site rules in § 17.088.050–070. § 17.088.020
  • RM‑S (Multiple‑Family Senior Residential) — senior housing rules, permitted density and occupancy standards are at § 17.090.010–020. § 17.090.010
  • Single‑family and other residential typologies named in the code include RD 5.5‑7, RS 6, RS 7.5, and Upland Residential (UP); these appear in the applicability and residential‑standards text (see § 17.020.030). § 17.020.030
  • Planned and special residential forms include PDD (Planned Development District) and Single‑Family Residential Master Plan zones; PDD procedures and purposes are spelled out in § 17.112.010–120. § 17.112.010
• Commercial / Mixed‑use districts
  • The code explicitly references Central Commercial (CC), Limited Commercial (CL), Highway Commercial (CH), Service Commercial (CS) and Commercial Recreation (CR) in the design‑review and applicability sections. § 17.020.030
  • Mixed‑use capacity and build‑form standards (including special rules for Workforce Housing Overlay areas) are found in the Town Center and mixed‑use design rules (see cross references to Chapter 17.138). § 17.138.420
• Overlays and special districts
  • The code anticipates overlay treatments such as Workforce Housing Overlays (WHO‑A and WHO‑B), a Ridgeline Scenic Corridor / Ridgeline Development regime (Chapter 17.060), floodplain rules (Chapter 17.068), and other special‑purpose map layers that modify base zones. § 17.020.030 § 17.116.070(E) § 17.026.050(D)

Citywide development standards

• Lot coverage: in residential zones the default maximum building/structure coverage is 35% of lot area unless a variance, waiver, or density‑bonus allows more. § 17.040.010
• Setbacks: the code sets general yards as 10 ft front, 10 ft rear, and 5 ft side as the baseline for most zones (with corner‑lot and narrow‑lot adjustments in the same section). § 17.040.020
  • Commercial/industrial sidewalks have a specific minimum 7 ft front sidewalk setback where no public sidewalk exists. § 17.040.030
  • Stream/creek setbacks: structures adjacent to Fairfax and San Anselmo Creeks are restricted to no closer than 20 ft or two times the average bank depth, whichever is greater, unless authorized by variance. § 17.040.040
• Height and stories: maximum heights and story limits are set in the individual zone chapters (for example UR zone rules limit many principal buildings to 28.5 ft on low‑slope lots and up to 35 ft on downhill lots; see § 17.124.060). § 17.124.060
• Floor Area Ratio / lot coverage for mixed‑use and commercial properties are addressed in the zone‑specific chapters and in Chapter 17.138 for Town Center standards (see the comparative table and notes in the mixed‑use rules). § 17.138.420
• Parking: off‑street parking standards are set out in Chapter 17.052, and multiple zone chapters cross‑reference that chapter for off‑street parking and loading requirements. § 17.116.070(E)(2) Fairfax Parking
• Landscaping, screening, and transparency requirements appear as objective standards in the code and are applied during review and via required checklists. § 17.020.040(B) Fairfax Landscaping and Screening

(For the town’s formal development‑standards tables and the Town Center build‑form matrix see the development‑standards menu.) Fairfax Development Standards

Design review and discretionary controls

• Design review criteria are consolidated and limited to exterior elements with a material effect on appearance — height, massing, setbacks, materials, signs and landscaping — and are enforced through Planning Commission review and objective standards where adopted. § 17.020.040(A)–(B) Fairfax Design Review
• The Planning Director is required to prepare checklists to determine compliance with objective design standards for state‑streamlined ministerial housing projects and other objectively‑regulated projects. § 17.020.040(L)
• Waivers and reasonable accommodations: the Planning Director can grant dimensional waivers up to 10% (and in limited cases more) for setbacks, parking dimensions, lot coverage, and similar objective standards per § 17.044.090–100, subject to findings. § 17.044.090

Specific plans & overlays

• Planned Development Districts (PDD) provide a comprehensive path for large or mixed projects, with preliminary, master and precise plan steps and special density and open‑space rules in § 17.112.010–180. § 17.112.020
• Ridgeline, floodplain, and wildlife protections are handled in dedicated chapters and are cross‑referenced in zone‑level site preparation rules; projects in sensitive areas must meet those chapter standards (for example, ridgeline rules are invoked in the site‑prep chapter § 17.116.070). § 17.116.070(E)
• Workforce Housing Overlays are anticipated and specifically referenced in the code’s applicability sections and in Town Center build‑form rules, with special height and ground‑floor use incentives noted for WHO zones. § 17.020.030(C) § 17.138.420 (notes) Fairfax Overlay Districts

Building permits & review (the practical path)

• Two distinct permits are central: a zoning (or zoning) permit that certifies compliance with land‑use rules and a building permit issued by the building official for construction work; Fairfax requires both where applicable. § 17.024.030 § 17.024.060
• Zoning permits are issued by planning staff if the project conforms with the title and any applicable objective standards; the staff may impose objective, broadly applicable conditions. § 17.024.030
• Discretionary approvals (use permits, variances, design review, tentative maps and similar entitlements) are handled at public hearings by the Planning Commission or Town Council as specified in the zone chapters and procedural sections. § 17.056.020 (definitions)
• For qualifying housing projects that meet the State streamlined ministerial requirements, Fairfax’s Chapter 17.026 provides the ministerial review path and the Planning Director acts as the review authority; subsequent permits may be ministerial if objective standards are met. § 17.026.040–050

(If you are preparing an application, start with preliminary plans as encouraged in § 17.020.060, and expect submittal requirements for site plans, elevations, landscaping, and operational data.) § 17.020.060

State housing law in Fairfax

Fairfax’s code explicitly incorporates and implements several state housing laws and processes:

• Streamlined ministerial approvals (State Gov’t Code § 65913.4): Fairfax implemented local rules in Chapter 17.026; eligible multi‑family and mixed‑use housing projects that meet the state criteria can receive ministerial approval and the town’s Chapter 17.026 defines applicability, eligibility and ministerial procedures. § 17.026.010–050 California housing laws
• SB 330 / Permit timing: Procedures for housing development review timeframes and application completeness are established in Chapter 17.027, including 30/60‑day timelines for housing applications and the Planning Director as review authority for full applications. § 17.027.060–070
• Density bonus and concessions: the code references its Chapter 17.050 as the mechanism for density bonuses and concessions for affordable housing (used in contexts such as lot‑coverage exceptions and increased allowable densities). § 17.040.010 § 17.088.020
• Accessory dwelling units (ADUs) and junior ADUs: ADUs are allowed as accessory residential uses in multiple residential and single‑family zone chapters but are explicitly governed by Chapter 17.048 (the code repeatedly cross‑references Chapter 17.048 for ADU procedures and standards). § 17.088.040(C) Fairfax ADUs California ADU law
• Interaction with the California Building Standards Code: Fairfax applies objective building standards and references the State code where applicable; objective building standards adopted by the town and the California Building Standards Code inform permit conditions and post‑approval modifications. § 17.026 (post‑approval modification language) California Building Standards Code

Important caveats on state law points: the code implements ministerial streamlining and SB 330 procedures, but the local code text we retrieved does not include an explicit SB 9 lot‑split/ministerial two‑unit implementation chapter; verify SB 9-specific local protocols with the Planning Department. Not found in retrieved materials.

Information gaps (what to verify with Fairfax)

• The uploaded excerpts repeatedly reference Chapter 17.048 for ADU standards but the detailed ADU size, setback and parking limits were not present in the snippets I reviewed; review Chapter 17.048 directly to confirm numeric ADU rules. § 17.088.040(C)
• I did not find a local rent‑control ordinance or an explicit SB 9 implementation chapter in the material retrieved; check the town clerk or Planning Department for rent‑control or objective SB 9/lot‑split procedures. Not found in retrieved materials.
• Historic preservation overlay text and a consolidated list of all zoning district map designations (a single map file) were not present in the excerpts; consult the official zoning map and any historic‑preservation chapter for details. Not found in retrieved materials.

Source References

• Fairfax Zoning Code, CHAPTER 17 (uploaded excerpts): examples cited above include § 17.040.010 and § 17.040.020 for lot coverage and setbacks. § 17.040.010; § 17.040.020
• Design review and applicability: § 17.020.030–050 (design review criteria and application). § 17.020.030; § 17.020.040; § 17.020.050
• Planned Development District: § 17.112.010–120 (PDD purpose and procedures). § 17.112.010; § 17.112.020
• RM zone rules and ADU cross‑reference: § 17.088.010–050 (permitted uses and accessory ADU cross‑reference to Chapter 17.048). § 17.088.020; § 17.088.040
• Streamlined ministerial housing (state implementation): CHAPTER 17.026 (purpose, applicability, eligible projects). § 17.026.010; § 17.026.040; § 17.026.050
• SB 330 procedures and timeframes: CHAPTER 17.027, including § 17.027.060–080 on review timeframes and compliance determinations. § 17.027.060; § 17.027.070; § 17.027.080
• Waivers and limits: § 17.044.090–100 (waiver authority and procedures). § 17.044.090; § 17.044.100
• Town site preparation and site‑specific rules, including ridgeline and parking cross‑references: § 17.116.070 and cross references to Chapter 17.052 (parking). § 17.116.070; Chapter 17.052

Fairfax Parking Fairfax Design Review Fairfax Overlay Districts Fairfax ADUs California Building Standards Code Fairfax Development Standards Fairfax Zoning California housing laws