Fence and Retaining Wall Permit (Minor Improvement Permit) in Flagstaff, Arizona
VerifiedFences and retaining walls in Flagstaff are regulated by height, with most fences and shorter retaining walls handled via a Zoning-issued Minor Improvement Permit ($80 flat fee) rather than a full Building Permit.
Verified 2026-07-03 · Source
When you need this permit
- Fences and walls (non-retaining) up to 7 feet high: Minor Improvement Permit (Zoning), $80 flat fee; fences over 7 feet require a full Building Permit; fences over 6 feet require a zoning variance
- Fences in the front setback area are capped at 3 feet (solid wall/fence) or 4 feet (vinyl-coated chain link)
- Corner lots require an intersection sight triangle per Engineering Standards Section 10-06-020 (Intersection Sight Triangles, Clear View Zones)
- Retaining walls 4 feet or less (measured from bottom of footing to top of wall): Minor Improvement Permit (Zoning), $80 flat fee
- Retaining walls over 4 feet high, or any wall supporting a surcharge or impounding Class I/II/IIIA liquids regardless of height, require a full Building Permit
- Site plan required showing north arrow, property lines/dimensions, existing structures, easements, and adjacent street names
Required documents
- Required
Application for Minor Improvement Permit (PDF, updated April 16, 2020)
City of Flagstaff Community Development Division form for fences, walls, retaining walls, decks, accessory structures, landscape modifications, and exterior/facade modifications
- Required
Site Plan
Showing height/location of existing and proposed fence or wall, setback from front property line, and materials
Fee schedule
| Fee type | Amount | Notes |
|---|---|---|
| Minor Improvement Permit Application Fee | $80.00 | City of Flagstaff Minor Improvement Permit Application checklist (flat fee, covers fences/walls, retaining walls, decks, accessory structures, landscape and exterior/facade modifications) |
| Building Permit Fee (valuation-based, for fences over 7 ft or retaining walls over 4 ft) | Project valuation x 0.01 permit fee multiplier, plus 65% plan review fee | City of Flagstaff Resolution 2017-21 general fee methodology |
Review timeline
Not published
Flagstaff does not publish a plan-review timeline — contact the building department for current turnaround.
Inspection process
- 1
Final
Code Compliance Program inspects completed fence/wall against approved Minor Improvement Permit application; contact (928) 213-2147 or codecompliance@flagstaffaz.gov to schedule
Tips
- The Minor Improvement Permit ($80 flat fee) covers not just fences and retaining walls but also decks, accessory structures/storage containers, landscape modifications, and exterior/facade modifications — check the box for your specific project type.
- Fences over 6 feet require a zoning variance in addition to any permit — confirm with the Planner of the Day before finalizing plans.
Frequently asked questions
- Do I need a building permit for a fence in Flagstaff?
- Fences up to 7 feet high need only a Minor Improvement Permit (Zoning, $80 flat fee), not a Building Permit. Fences over 7 feet require a full Building Permit, and fences over 6 feet require a zoning variance. Source: City of Flagstaff Minor Improvement Permit Application checklist and 'When is a building permit needed?' (PDF).
Sources & verification
Verified against official sources. Last reviewed 2026-07-03.
- City of Flagstaff Building Safety Section (Planning & Development Services, Community Development Division) — official building department
- Application for Minor Improvement Permit (PDF) | City of Flagstaff
- When is a building permit needed? (PDF) | City of Flagstaff
- Current Planning | City of Flagstaff
Fees, timelines, and adopted codes are researched from each jurisdiction's published records — see how we verify. Requirements change and vary by project, so always confirm the current details with the Flagstaff building department before you submit. PermitBase is an independent reference and is not affiliated with any government agency.
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