Do I Need a Permit for a Commercial Tenant Improvement in Idaho?
Commercial tenant improvement permit requirements. When a TI needs a permit, the permit stack, stamped drawings, contractor licensing, and change-of-occupancy triggers.
Almost always yes — a commercial tenant improvement needs a building permit, usually with electrical, mechanical, and fire permits alongside it.
Idaho-specific rules
Idaho REGISTERS contractors rather than licensing them: the Idaho Contractor Registration Act (Idaho Code Title 54, Chapter 52) makes it unlawful to engage in the business of contracting without being registered, and registration turns on proof of workers' compensation insurance rather than a trade examination. The consequence that matters most on a commercial tenant improvement is financial: an unregistered contractor is deemed to have CONCLUSIVELY WAIVED any right to place a mechanic's lien on the property. Registered contractors must display their registration number on contracts, permits and advertising.
Sources: Idaho Code Title 54 Chapter 52 — Idaho Contractor Registration Act, Idaho Code 54-5205 — Registration required
When a Tenant Improvement Needs a Permit
Nearly any commercial tenant improvement that moves a wall, changes the electrical or mechanical layout, or alters exits needs a building permit. Cosmetic work — paint, carpet, and like-for-like fixture swaps — usually does not. The line is structural and life-safety impact, not cost: relocating a single non-bearing partition can trigger a permit while a far more expensive finish package does not. Because a tenant improvement is commercial rather than residential, plan review is typically more involved and the accessibility and fire provisions apply in full.
The Permit Stack
A tenant improvement rarely means one permit. The building permit is the parent, and electrical, mechanical, and plumbing permits are usually pulled alongside it by the respective subcontractors. Fire sprinkler and fire alarm work commonly needs separate review, sometimes by a fire district rather than the building department. Expect each trade permit to carry its own inspections, and expect the certificate of occupancy or completion to depend on all of them passing — one open trade permit can hold up the whole space.
Stamped Drawings and Who Prepares Them
Most jurisdictions require plans prepared by a licensed architect or engineer for commercial work, with the threshold set by floor area, occupant load, or the nature of the change rather than by a single national rule. Structural modifications almost always need an engineer stamp. Energy compliance documentation for the mechanical and lighting scope is commonly required as well. Confirm the stamping threshold with the building department before you commission drawings, because redrawing a set to add a stamp is slower and more expensive than commissioning it stamped.
Contractor Licensing Is a State Question
Who may legally perform a tenant improvement is decided at the state level, and the rules differ more than most people expect. Some states license contractors centrally and separate commercial from residential qualification; some register contractors instead, tied to workers compensation rather than a trade exam; and some leave general contracting to city or county licensing while still licensing the electrical and mechanical trades at state level. The consequences of getting it wrong range from a failed inspection to a contractor losing the right to lien the property. Check the requirement for your state before signing, not after.
Assume a commercial tenant improvement needs a building permit plus trade permits, and budget for plan review. Confirm three things early: whether your drawings need an architect or engineer stamp, whether the work changes the building's occupancy classification, and how your state licenses or registers the contractor doing the work.
Permit fees by city in Idaho
Verified from each city’s published fee schedule. Where a city has no separate fee listed for this project, open the city page for the current requirements and amount.
77 rows
| Permit fee | Source | |
|---|---|---|
| American Falls | $23.50Verifiedvia Consolidated Building-Development Permit (New Construction, Additions, Alterations, Repairs, Moving, Demolition, Signs, Grading) | Consolidated Building-Development Permit (New Construction, Additions, Alterations, Repairs, Moving, Demolition, Signs, Grading) → |
| Ammon | $40.00 base feeVerifiedvia Commercial Building Permit (New Construction, Additions & Remodels / Tenant Improvement) | Commercial Building Permit (New Construction, Additions & Remodels / Tenant Improvement) → |
| Blackfoot | $100Verified | Commercial Tenant Improvement / Remodel Permit → |
| Boise | $26.37 for the first $500, plus $2.95 per each additional $100 or fraction thereofVerifiedvia New Commercial Building and Commercial Additions Permit (502) | New Commercial Building and Commercial Additions Permit (502) → |
| Buhl | $23.50Verifiedvia Building Permit (Commercial New Construction, Additions, Remodels, Tenant Improvements, Repairs) | Building Permit (Commercial New Construction, Additions, Remodels, Tenant Improvements, Repairs) → |
| Burley | Actual declared project valuation determines the fee (versus an assumed per-square-foot valuation method used for residential)Verifiedvia Commercial Building Permit (New Construction, Additions, Remodels & Tenant Improvement) | Commercial Building Permit (New Construction, Additions, Remodels & Tenant Improvement) → |
| Caldwell | See city page for the current Commercial Tenant Improvement (TI) Permit fee | Commercial Tenant Improvement (TI) Permit → |
| Cascade | See city page for the current Commercial Tenant Improvement (TI) / Remodel Permit fee | Commercial Tenant Improvement (TI) / Remodel Permit → |
| Chubbuck | See city page for the current Commercial Building Permit fee | Commercial Building Permit → |
| City of St. Maries | See city page for the current Commercial Tenant Improvement (TI) / Remodel Permit fee | Commercial Tenant Improvement (TI) / Remodel Permit → |
| Coeur d'Alene | See city page for the current Commercial Tenant Improvement (TI) Permit fee | Commercial Tenant Improvement (TI) Permit → |
| Donnelly | $24.00Verifiedvia Commercial Building Permit (New Construction, Additions, Remodels & Tenant Improvements) | Commercial Building Permit (New Construction, Additions, Remodels & Tenant Improvements) → |
| Driggs | $955Verifiedvia Commercial Building Permit | Commercial Building Permit → |
| Eagle | Cost up to $20,000: multiply by 3% plus $60; cost $20,001–$100,000: subtract $20,000, multiply by 2%, plus $660; cost over $100,001: subtract $100,000, multiply by 1%, plus $2,260Verifiedvia Commercial Building Permit (New Construction / Tenant Improvement) | Commercial Building Permit (New Construction / Tenant Improvement) → |
| Emmett | See city page for the current Commercial Building Permit fee | Commercial Building Permit → |
| Fruitland | Same valuation table as the general Building Permit — see residential-building-permit entry (e.g., $993.75 for the first $100,000.00 of valuation)Verified | Commercial Tenant Improvement Permit (Remodel of Existing Commercial Space) → |
| Grangeville | $15.00Verifiedvia Commercial Building Permit (New Construction, Additions, Remodels & Tenant Improvements) | Commercial Building Permit (New Construction, Additions, Remodels & Tenant Improvements) → |
| Greenleaf | See city page for the current Commercial Building Permit (New Construction / Exterior Remodel) fee | Commercial Building Permit (New Construction / Exterior Remodel) → |
| Hailey | $27.78Verifiedvia Commercial Building Permit (New Construction, Additions, Remodels & Tenant Improvements) | Commercial Building Permit (New Construction, Additions, Remodels & Tenant Improvements) → |
| Harrison | Per Table 1-A of the 1997 Uniform Building Code, applied to project valuation determined from ICBO Building Valuation DataVerifiedvia Commercial Building Permit (New Construction, Additions & Remodels) | Commercial Building Permit (New Construction, Additions & Remodels) → |
| Hayden | See city page for the current Commercial Alteration / Tenant Improvement (TI) Permit fee | Commercial Alteration / Tenant Improvement (TI) Permit → |
| Heyburn | See city page for the current New or Addition Commercial Building Permit (Commercial/Non-Residential/Multi-Family) fee | New or Addition Commercial Building Permit (Commercial/Non-Residential/Multi-Family) → |
| Idaho City | $23.50Verifiedvia Commercial Building Permit (New Construction & Additions) | Commercial Building Permit (New Construction & Additions) → |
| Idaho Falls | See city page for the current Commercial Remodel / Tenant Improvement (TI) Permit fee | Commercial Remodel / Tenant Improvement (TI) Permit → |
| Jerome | $23.50 minimum ($1-$500 valuation), scaling per the Master City-Wide Fee Schedule building permit tableVerifiedvia Commercial Building Permit | Commercial Building Permit → |
| Kellogg | See city page for the current Commercial Building Permit (New Construction, Additions, Alterations & Tenant Improvement) fee | Commercial Building Permit (New Construction, Additions, Alterations & Tenant Improvement) → |
| Ketchum | The same seven-tier valuation schedule used for the Residential Building Permit, from $24.75 for the first $500 of valuation up to $5,889.25 for the first $1,000,000 plus $3.85 per each additional $1,000Verifiedvia Commercial Building Permit (New Construction, Additions, Remodels & Tenant Improvements) | Commercial Building Permit (New Construction, Additions, Remodels & Tenant Improvements) → |
| Kimberly | See city page for the current Commercial Building Permit fee | Commercial Building Permit → |
| Kootenai County | Valuation from Exhibit B (occupancy-group/construction-type table) minus the shell's already-assessed Shell Valuation, run through the Exhibit A fee formulaVerified | Commercial Tenant Improvement (TI) Permit → |
| Kuna | $200Verifiedvia Commercial Building Permit | Commercial Building Permit → |
| Lewiston | $40.10Verified | Commercial Tenant Improvement / Addition-Alteration Permit → |
| Malad City | See city page for the current Commercial Building Permit (New Construction / Tenant Improvement / Change of Use) fee | Commercial Building Permit (New Construction / Tenant Improvement / Change of Use) → |
| McCall | Same city-wide valuation table used for all building permits: $23.50 (up to $500) through $5,608.75 + $3.65/$1,000 (over $1,000,000)Verified | Commercial Tenant Improvement (TI) / Interior Alteration Permit → |
| Melba | See city page for the current Commercial Building Permit (New Construction, Additions, Remodels & Tenant Improvement) fee | Commercial Building Permit (New Construction, Additions, Remodels & Tenant Improvement) → |
| Meridian | $50 if commercial project value is under $20,000; $150 if project value is $20,000 or moreVerified | Commercial Tenant Improvement (TI) Permit → |
| Middleton | See city page for the current New Commercial Building Permit fee | New Commercial Building Permit → |
| Minidoka County (Building Authority for Unincorporated County and the Cities of Acequia, Minidoka, Paul, and Rupert) | See city page for the current Commercial Tenant Improvement / Remodel Permit fee | Commercial Tenant Improvement / Remodel Permit → |
| Moscow | Per the Total Valuation bracket table (e.g., $79.50 for $2,001-$25,000, plus $14.50 per additional $1,000)Verified | Commercial Tenant Improvement / Alteration Permit → |
| Mountain Home | See city page for the current Commercial Building Permit (New Construction, Additions & Remodels / Tenant Improvement) fee | Commercial Building Permit (New Construction, Additions & Remodels / Tenant Improvement) → |
| Nampa | $22.20 flat (≤$500) up to $5,299.94 for the first $1,000,000 plus $3.45 per additional $1,000 above that — same valuation table used for all Nampa building permitsVerified | Commercial Tenant Improvement (TI) Permit → |
| Notus | See city page for the current Commercial Building Permit (New Construction) fee | Commercial Building Permit (New Construction) → |
| Osburn | Valuation (project-specific, determined by the building official)Verifiedvia Commercial Building Permit (New Construction, Additions, Alterations & Tenant Improvement) | Commercial Building Permit (New Construction, Additions, Alterations & Tenant Improvement) → |
| Payette | Same Resolution No. 2017-04 valuation schedule as the Residential Building Permit (Table 1-A, $24 minimum up to $18,327 + $1.00/$1,000 over $5,000,000)Verifiedvia Commercial Building Permit | Commercial Building Permit → |
| Plummer | See city page for the current Commercial Tenant Improvement / Change of Use Permit fee | Commercial Tenant Improvement / Change of Use Permit → |
| Pocatello | $23.50 minimum ($1-$500 valuation), scaling per the Building Permit Fees table (e.g., $69.25 for the first $2,000 plus $14.00 per additional $1,000 up to $25,000; see Commercial Building Permit entry for the full table)Verified | Commercial Tenant Improvement / Remodel Permit → |
| Post Falls | Based on a licensed contractor's bid for the proposed workVerified | Commercial Tenant Improvement / Change of Use or Occupancy Permit → |
| Preston | Set by city inspector, based on valuationVerifiedvia Commercial Building Permit (New Construction, Additions, Remodels & Tenant Improvements) | Commercial Building Permit (New Construction, Additions, Remodels & Tenant Improvements) → |
| Priest River | Per Table 1-A of the 1997 Uniform Building Code (valuation-based)Verifiedvia Commercial & Industrial Building Permit (New Construction, Additions, Remodel/TI, Change of Use) | Commercial & Industrial Building Permit (New Construction, Additions, Remodel/TI, Change of Use) → |
| Rathdrum | See city page for the current Change of Occupancy / Tenant Improvement Permit fee | Change of Occupancy / Tenant Improvement Permit → |
| Rigby | $26.46Verifiedvia Commercial Building Permit (New Construction, Addition, Alteration & Tenant Improvement) | Commercial Building Permit (New Construction, Addition, Alteration & Tenant Improvement) → |
| Salmon | $24Verifiedvia Commercial Building Permit (New Construction, Additions & Remodels) | Commercial Building Permit (New Construction, Additions & Remodels) → |
| Sandpoint | See city page for the current Commercial Tenant Improvement Permit fee | Commercial Tenant Improvement Permit → |
| Shelley | $21.00Verifiedvia Commercial Building Permit (New Construction, Additions, Remodels & Tenant Improvement) | Commercial Building Permit (New Construction, Additions, Remodels & Tenant Improvement) → |
| Soda Springs | See city page for the current Commercial Building Permit (New Construction / Addition / Remodel / Tenant Improvement) fee | Commercial Building Permit (New Construction / Addition / Remodel / Tenant Improvement) → |
| Spirit Lake | See city page for the current Commercial Building Permit (New Construction & Tenant Improvement) fee | Commercial Building Permit (New Construction & Tenant Improvement) → |
| Star | $200.00Verifiedvia Commercial Building Permit (New Construction & TI) | Commercial Building Permit (New Construction & TI) → |
| Twin Falls | $22.00Verified | Commercial Tenant Improvement (TI) / Remodel / Change of Occupancy Permit → |
| Unincorporated Ada County | Valuation-based per Ada County 2025 Fee Schedule (Resolution 3149, effective November 2025); see Building-Fees.pdf at adacounty.id.gov/developmentservices/permitting-division/fees/Verifiedvia Commercial Building Permit (New Construction / Tenant Improvement) | Commercial Building Permit (New Construction / Tenant Improvement) → |
| Unincorporated Bannock County | See city page for the current Commercial Building Permit (New Construction, Addition, Demolition, Change of Occupancy, Remodel/Tenant Improvement) fee | Commercial Building Permit (New Construction, Addition, Demolition, Change of Occupancy, Remodel/Tenant Improvement) → |
| Unincorporated Bingham County | See city page for the current Commercial Building Permit (New Construction, Addition, Remodel & Tenant Improvement) fee | Commercial Building Permit (New Construction, Addition, Remodel & Tenant Improvement) → |
| Unincorporated Bonneville County | See city page for the current Commercial Building Permit (New Construction / Tenant Improvement) fee | Commercial Building Permit (New Construction / Tenant Improvement) → |
| Unincorporated Canyon County | $280.00Verifiedvia Commercial Building Permit (New Construction / Addition / Tenant Improvement) | Commercial Building Permit (New Construction / Addition / Tenant Improvement) → |
| Unincorporated Cassia County | Calculated based on square footage using the IBC 2003 Valuation Table 1Verifiedvia Commercial Building Permit (New Construction, Additions & Remodels / Tenant Improvement) | Commercial Building Permit (New Construction, Additions & Remodels / Tenant Improvement) → |
| Unincorporated Elmore County | $200.00Verifiedvia Commercial Building Permit (New Construction / Tenant Improvement) | Commercial Building Permit (New Construction / Tenant Improvement) → |
| Unincorporated Franklin County | See city page for the current Commercial Building Permit (New Construction / Remodel Changing Outside Dimensions) fee | Commercial Building Permit (New Construction / Remodel Changing Outside Dimensions) → |
| Unincorporated Gem County | Same valuation-based schedule as the residential building permit — see Gem County Fee Schedule for Building Permits (2023)Verifiedvia Commercial Building Permit (New Construction / Tenant Improvement) | Commercial Building Permit (New Construction / Tenant Improvement) → |
| Unincorporated Jefferson County | Valuation-based per Jefferson County Fee Schedule 2026, Exhibit A — e.g. $536.90 for the first $40,000 plus $9.92 per additional $1,000 up to $100,000; $1,132.10 for the first $100,000 plus $7.71 per additional $1,000 up to $500,000; see the file's residential-building-permit entry for the full tier tableVerifiedvia Commercial Building Permit (New Construction / Addition) | Commercial Building Permit (New Construction / Addition) → |
| Unincorporated Latah County | See city page for the current Commercial Tenant Improvement / Alteration Permit fee | Commercial Tenant Improvement / Alteration Permit → |
| Unincorporated Madison County | See city page for the current Commercial Building Permit (New Construction, Additions & Remodels) fee | Commercial Building Permit (New Construction, Additions & Remodels) → |
| Unincorporated Nez Perce County | See city page for the current Commercial Building Permit fee | Commercial Building Permit → |
| Unincorporated Power County | See city page for the current Commercial Building Permit (New Construction, Additions & Tenant Improvement/Remodel) fee | Commercial Building Permit (New Construction, Additions & Tenant Improvement/Remodel) → |
| Unincorporated Twin Falls County | Per-square-foot rate varies by occupancy group and construction type (Type IA through VB); e.g. Business (B): $90.88–$132.95/sq ft; Mercantile (M): $63.76–$95.14/sq ft — see full 2025 fee schedule for all groups/typesVerifiedvia Commercial Building Permit (New Construction / Tenant Improvement) | Commercial Building Permit (New Construction / Tenant Improvement) → |
| Unincorporated Valley County | $24.00Verifiedvia Commercial Building Permit (New Construction / Commercial or Community Type Structures) | Commercial Building Permit (New Construction / Commercial or Community Type Structures) → |
| Victor | Commercial Permit Fees Based on Commercial Values per Square Foot — see ICC Building Valuation DataVerifiedvia Commercial Building Permit | Commercial Building Permit → |
| Wallace | See city page for the current Commercial Building Permit (New Construction, Additions, Remodels & Tenant Improvements) fee | Commercial Building Permit (New Construction, Additions, Remodels & Tenant Improvements) → |
| Wilder | $24.00Verifiedvia Commercial Building Permit (New Construction, Additions, Remodels & Tenant Improvements) | Commercial Building Permit (New Construction, Additions, Remodels & Tenant Improvements) → |
| Worley | $1-$500: $16.45 | $501-$2,000: $16.45 for the first $500 plus $2.14 per additional $100 (or fraction), to $2,000 | $2,001-$25,000: $48.48 for the first $2,000 plus $9.80 per additional $1,000 (or fraction), to $25,000 | $25,001-$50,000: $274.23 for the first $25,000 plus $7.07 per additional $1,000 (or fraction), to $50,000 | $50,001-$100,000: $450.63 for the first $50,000 plus $4.90 per additional $1,000 (or fraction), to $100,000 | $100,001-$500,000: $695.63 for the first $100,000 plus $3.92 per additional $1,000 (or fraction), to $500,000 | $500,001-$1,000,000: $2,263.63 for the first $500,000 plus $3.33 per additional $1,000 (or fraction), to $1,000,000 | $1,000,001-$5,000,000: $3,926.13 for the first $1,000,000 plus $2.56 per additional $1,000 (or fraction), to $5,000,000 | $5,000,001-$10,000,000: $14,146.13 for the first $5,000,000 plus $1.93 per additional $1,000 (or fraction), to $10,000,000 | $10,000,001 and up: $23,771.13 for the first $10,000,000 plus $1.40 per additional $1,000 (or fraction)Verifiedvia Commercial Building Permit | Commercial Building Permit → |