Commercial Tenant Improvement (TI) Permit — Flagstaff, Arizona · Requirements sheet
Verified 2026-07-29 · Source: https://www.flagstaff.az.gov/DocumentCenter/View/42127/Commercial-Review-Process-Timeframe-and-Checklist
PermitBase is an independent reference and is not affiliated with any government agency. Requirements change and vary by project — confirm current details with the building department before you submit.
Commercial Tenant Improvement (TI) Permit in Flagstaff, Arizona
Flagstaff's Commercial Plan Review document explicitly defines 'Commercial Tenant Improvement Plans' as a genuinely distinct review track from full new commercial construction ('Commercial Building /Civil Plan Review') — with its own, faster Administrative Completeness Review (10 working days vs. 15) and Substantive Review (25 working days vs. 50) timeframes, for an overall 35 working days vs. 65, and its own dedicated submittal checklist (existing + proposed floor plans, a vicinity map at minimum, and only the framing/structural plans relevant to the scope of interior work). It is billed under the same general valuation-based Building Permit Fee methodology (Resolution 2017-21) as other Building Permits, since Flagstaff publishes no separate flat TI fee schedule — though the underlying ICC Building Valuation Data itself notes it is 'not intended to apply to alterations or repairs to existing buildings,' the same caveat that applies to the City's residential-addition-remodel permit type.
Verified 2026-07-29 · Source
When you need this permit
- A Commercial Tenant Improvement Permit is required for interior build-out, remodel, or alteration of an existing commercial tenant space, reviewed under the 2018 Suite of Codes as adopted by City of Flagstaff Resolution 2019-26 / Ordinance 2019-16
- Application for Commercial Building/Grading Permit is used, with 'Tenant Improvements' checked as the project category on the accompanying Owner Authorization Form (distinct from 'New Build')
- Tenant Improvement Plans checklist requires: Standard Code Summary Block on the cover sheet, a vicinity map at minimum, and BOTH the existing floor plan and the proposed floor plan with each room labeled for its intended use
- Construction plans must be sealed by an Arizona registrant per A.R.S. 32-143 if the project is over 3,000 sq ft, has 20 or more occupants, or has structural members greater than 20 feet
- Floor/wall/roof framing plans and structural calculations are required only if the TI scope adds a mezzanine/second floor, changes wall framing (with approved fire-rated assemblies when required), or makes structural changes/additions/repairs; a foundation plan is required only if adding structural support
- Elevation drawings are required only if the TI project includes exterior work
- Restaurants, medical marijuana facilities, pools, and similar uses require separate approval documentation from the Coconino County Health Department
- Plan re-submittals (changes to already-approved TI plans) require a description of proposed changes, a field copy of the 'Approved Plans,' and — if adding new work — a new application and permit rather than a resubmittal
- Fire sprinkler and fire alarm system TI work (e.g., adding/relocating sprinkler heads or alarm devices) requires a separate Fire Prevention Permit from the Flagstaff Fire Department, billed by sprinkler-head-count or device-count tiers distinct from this Building Permit
- Apply through the Citizen Access Portal, or submit directly to the Building Safety & Code Compliance Section (211 W Aspen Avenue)
Required documents
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Fee schedule
Review timeline
Inspection process
- 1
Rough-In (Mechanical/Electrical/Plumbing)
Rough-in inspection of any new mechanical, electrical, or plumbing work before concealment, scoped to the TI work performed
- 2
Final
Interior build-out complete per approved TI plans; required before occupancy of the modified tenant space
See the full Flagstaff inspection guide — scheduling & re-inspection fees →
Tips
- Tenant Improvement plan review is genuinely faster than new commercial construction: 10 working days Administrative Completeness Review + 25 working days Substantive Review = 35 working days overall, versus 15 + 50 = 65 working days for full 'Commercial Building /Civil Plan Review.' Confirmed directly from the raw text of the City's Commercial Plan Review PDF, not a summarized rendering.
- The TI submittal checklist is genuinely different from the new-construction checklist: it requires BOTH an existing floor plan and a proposed floor plan (to show what's changing), a vicinity map at minimum, and only the structural/framing plans relevant to the actual scope of interior work — full site plans, landscape plans, and grading documentation (required for new construction) are not listed as TI checklist items.
- If a TI project adds new scope beyond an approved plan set, City policy requires submitting an entirely new application/permit for the additional work rather than folding it into a plan resubmittal.
- A change in occupancy classification triggered by a TI project (e.g., retail space becoming a restaurant) requires the separate Change of Occupancy process — see the certificate-of-occupancy-permit entry — in addition to the TI Building Permit.
Frequently asked questions
Sources & verification
Verified against official sources. Last reviewed 2026-07-29.
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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