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Tenant Improvement (TI) Permit in Middleton, Idaho

Required for interior alterations to existing commercial space in Middleton — including work to finish and convert a building shell from Certificate of Completion to Certificate of Occupancy, and any project where the occupancy of record has not been previously established. Applied for through the CitizenServe online portal. A $500 Tenant Improvement Building Permit Deposit is required at application (the 65% Commercial Building Plan Review Fee applies toward the deposit, due within 30 days or the deposit is forfeited). Distinct from the City's separate $75 Commercial Occupancy Only Permit, which covers a tenant moving into an already-permitted space of the identical occupancy classification with zero proposed alterations.

Reviewed 2026-08-02 · Source

When you need this permit

  • A Tenant Improvement Permit is required for existing buildings not previously occupied and for work to finish and convert a building shell from Certificate of Completion to Certificate of Occupancy (City of Middleton Commercial Certificate of Occupancy Only Permit & New Tenant Verification form)
  • Also required when occupancy of record has not been previously established, for approval of the proposed Use and Occupancy classification and issuance of a new Certificate of Occupancy
  • $500.00 Tenant Improvement Building Permit Deposit due at submittal (City Fee Schedule, Res. 526-25)
  • Plan set prepared by an Idaho Registered Design Professional per the City's 2018 IBC 'Commercial - NEW or Tenant Improvement' submittal requirements (occupant load calculations, life-safety/means-of-egress analysis, structural engineering, IECC energy COMMchecks, plumbing fixture calculations, accessible-elements design per ICC/ANSI A117.1-2009, etc.) — the same plan-set requirements apply to new commercial construction and TI projects
  • If the scope is limited to a tenant moving into an existing, already-occupied space of the same occupancy group/classification with NO proposed alterations, remodel, or improvements, a $75 Commercial Occupancy Only Permit may apply instead of a full TI Permit — the Building Department determines this during application review
  • Fire protection systems plans submitted separately to the applicable fire district: Middleton Fire District (north-of-river) or Caldwell Fire Dept. (south-of-river)
  • Building permit will not be issued until confirmation is received that Sewer & Water Connection and all applicable Impact, Civil Engineering, and Fire Department fees have been paid

Required documents

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Fee schedule

Tenant Improvement Building Permit DepositDue at application submittal; City Fee Schedule Res. 526-25 (current schedule effective 7/15/2026 per Res. 544-26)
$500.00
Building Permit Fee — valuation-basedCity Fee Schedule Res. 508-24/446-20, Attachment A
Actual Project Value per Certificate of Value (or equivalent BVD per Occupancy Classification and Type of Construction), applied against the same ICC 2021 Building Valuation Data (BVD) table used for new commercial and residential permits
Commercial Building Plan Review FeeMust be paid within 30 days of assessment or the permit deposit is forfeited (City Fee Schedule Res. 526-25)
65% of building permit fee
Electrical/Mechanical/Plumbing Commercial Plan Review Fee (each trade, if applicable)City Fee Schedule Res. 526-25
≤10,000 SF: $200.00; >10,000 to 100,000 SF: $400.00; >100,000 SF: $600.00
Electrical Permit — Other Installations commercial/industrial (Category #6), cost up to $10,000City Fee Schedule Res. 526-25, Attachment B — a copy of the contractor's bid is required
2% of fair market value of labor, equipment and materials, plus $60.00 (1% from $10,001-$100,000 plus $260.00; 0.5% over $100,001 plus $1,160.00)
Plumbing/Mechanical Permit — Other Installations commercial/industrial (Category #5), cost up to $20,000City Fee Schedule Res. 526-25, Attachments C & D
3% of cost of labor/materials/equipment plus $60.00 ($20,001-$100,000: minus $20,000, 2% plus $660.00; over $100,001: minus $100,000, 1% plus $2,260.00)
Commercial Occupancy Only Permit (related, alternate product — no alterations)City of Middleton Commercial Certificate of Occupancy Only Permit form — applies instead of a TI Permit only when moving into an existing, previously-occupied space of the same occupancy classification with zero proposed alterations
$75.00
Temporary Certificate of Occupancy — Commercial OnlyCity Fee Schedule Res. 526-25
$75.00
Public Works Residential/Commercial Building Inspection FeeCity Fee Schedule Res. 508-24
$25.00
Reinspection — Building, second notice of correction for same itemCity Fee Schedule Res. 508-24
$75.00

Review timeline

Plan review
Not published — contact the department

How long did your Tenant Improvement (TI) Permit permit actually take in Middleton?

Anonymous — one question, no email. Answers are combined and only shown once at least 5 people have reported.

Inspection process

  1. 1

    Rough-In (Electrical, Mechanical, Plumbing)

    Trade rough-in inspections for any new wiring, ductwork, or piping, requested separately by each trade contractor before walls close

  2. 2

    Framing / Fire-Rated Assemblies

    Interior wall framing and any fire-rated assemblies or penetration firestopping per the approved plan set, if the scope involves interior demising-wall or corridor work

  3. 3

    Final Building

    All work complete per approved plans; a site inspection by Building, Fire, and (for food service) Southwest District Health is required before a Certificate of Occupancy is issued

See the full Middleton inspection guide — scheduling & re-inspection fees →

Tips

  • The $500 TI deposit is half the $1,000 new-commercial-construction deposit — but both are subject to the same 65% Commercial Building Plan Review Fee.
  • Before assuming you need a full TI Permit, ask the Building Department whether your move-in qualifies for the $75 Commercial Occupancy Only Permit instead — it applies only when the space is already permitted for the identical occupancy classification and no alterations are proposed.
  • Even under the lighter Commercial Occupancy Only path, four separate reviewing departments/agencies sign off before a Certificate of Occupancy issues: Planning & Zoning, Building Department, the applicable Fire District, and Southwest District Health (for food storage/service uses).
  • A Certificate of Occupancy is required before opening for business — occupying the space without one is not permitted regardless of which permit path applies.
  • Same-day building inspections are not offered; inspection requests submitted before 4:00 PM in the CitizenServe portal are scheduled for the next business day.

Frequently asked questions

Middleton requires a tenant improvement (ti) permit for: A Tenant Improvement Permit is required for existing buildings not previously occupied and for work to finish and convert a building shell from Certificate of Completion to Certificate of Occupancy (City of Middleton Commercial Certificate of Occupancy Only Permit & New Tenant Verification form); Also required when occupancy of record has not been previously established, for approval of the proposed Use and Occupancy classification and issuance of a new Certificate of Occupancy; $500.00 Tenant Improvement Building Permit Deposit due at submittal (City Fee Schedule, Res. 526-25); Plan set prepared by an Idaho Registered Design Professional per the City's 2018 IBC 'Commercial - NEW or Tenant Improvement' submittal requirements (occupant load calculations, life-safety/means-of-egress analysis, structural engineering, IECC energy COMMchecks, plumbing fixture calculations, accessible-elements design per ICC/ANSI A117.1-2009, etc.) — the same plan-set requirements apply to new commercial construction and TI projects; If the scope is limited to a tenant moving into an existing, already-occupied space of the same occupancy group/classification with NO proposed alterations, remodel, or improvements, a $75 Commercial Occupancy Only Permit may apply instead of a full TI Permit — the Building Department determines this during application review; Fire protection systems plans submitted separately to the applicable fire district: Middleton Fire District (north-of-river) or Caldwell Fire Dept. (south-of-river); Building permit will not be issued until confirmation is received that Sewer & Water Connection and all applicable Impact, Civil Engineering, and Fire Department fees have been paid. If your project isn't listed, confirm with City of Middleton Building Department at (208) 585-3133 before starting work.

A $500.00 Tenant Improvement Building Permit Deposit is required at application submittal, per the City of Middleton Fee Schedule (Resolution 526-25).

No. No numeric plan-review turnaround timeline for Tenant Improvement permits was found on the City's website, fee schedule, or permitting instructions after exhaustive search. Contact the Building Department at (208) 585-3133 for current estimates.

You'll need: Tenant Improvement Permit Application; Floor Plan / Lease Plan; Complete Commercial Plan Set (2018 IBC). See the required-documents checklist on this page for details on each.

Middleton requires 3 inspection(s) for a tenant improvement (ti) permit, in order: Rough-In (Electrical, Mechanical, Plumbing), Framing / Fire-Rated Assemblies, Final Building. Schedule each through City of Middleton Building Department ((208) 585-3133).

Apply through City of Middleton Building Department at 1103 W Main St, Middleton, ID 83644. Phone: (208) 585-3133, email: citmid@middletoncity.org. Office hours: Mon–Fri 8:00 AM – 5:00 PM. Official information: https://middleton.id.gov/Departments/Building.

Middleton, Idaho has adopted: 2018 International Building Code (IBC), with Idaho amendments — adopted by reference via Middleton City Code Title 4, Chapter 1 (state-adopted code); 2018 International Residential Code (IRC), Parts I, II, III and IX — Idaho Residential Code (2020 Edition amendments); 2018 International Existing Building Code (IEBC); 2018 International Energy Conservation Code (IECC) — Idaho Energy Conservation Code (2020 Edition amendments); 2018 International Mechanical Code (IMC); 2018 International Fuel Gas Code (IFGC); 2018 International Residential Code Parts V & VI (mechanical); 2017 Idaho State Plumbing Code (based on 2015 Uniform Plumbing Code); 2023 National Electrical Code (NEC), with Idaho amendments; 2018 International Fire Code (IFC) — administered by the Idaho State Fire Marshal, not the City; ICC/ANSI A117.1-2009 (Accessible and Usable Buildings and Facilities). Local amendments apply — see the Middleton overview page for the full list.

Not necessarily. If you are moving into an already-permitted space of the identical occupancy classification and are making no alterations, remodel, or improvements, the City's $75 Commercial Occupancy Only Permit may apply instead. A TI Permit is required if the space has never been occupied, if you are converting a building shell from a Certificate of Completion to a Certificate of Occupancy, or if the occupancy classification is changing.

Sources & verification

Key facts verified against official sources. Last reviewed 2026-08-02.

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 Middleton building department before you submit. PermitBase is an independent reference and is not affiliated with any government agency.

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