Residential Building Permit (New Construction / Addition / Alteration / Repair) — Troy, Montana · Requirements sheet
Verified 2026-07-04 · Source: https://cityoftroymontana.com/wp-content/uploads/2023/10/Building-Permit-Application-2022.pdf
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.
Residential Building Permit (New Construction / Addition / Alteration / Repair) in Troy, Montana
Required for new single-family home construction, additions, alterations, and repairs within Troy city limits. Issued by the City of Troy under its DLI-certified local Building (B), RESIDENTIAL ONLY, program, using the City's own City of Troy Building Permit Application, reviewed by Building Inspector David Jones.
Verified 2026-07-04 · Source
When you need this permit
- Complete the City of Troy Building Permit Application: property location, owner/contractor/designer/electrician/plumber contact information, type of project (Residential, New/Addition/Alteration/Repair/Move/Demolition), description of the nature of the project, and estimated total cost (labor and materials)
- Submit one set of drawings/plans and specifications defining the scope, intent, and method of construction, typically including: (A) a site plan showing property lines, location of structures, existing/proposed utilities, parking areas, and adjacent streets/alleys; (B) floor plans showing use and relationship of spaces, sizes, doorways, windows, fixtures, stairways, and handicapped-accessible features if needed; (C) a section view through the building detailing size/type of materials and assembly method; (D) additional information may be required for commercial and multi-family structures or unusual/hazardous structures
- Construction may not begin until fees are paid and the permit is issued; separate electrical, plumbing, and mechanical permits issued by the State of Montana are required
- A Certificate of Occupancy must be issued before the building can be used
Required documents
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Fee schedule
Review timeline
Inspection process
- 1
Foundation Inspection
To be made after the footings are poured and any required forms for foundations are in place. Per City of Troy Inspection Record card.
- 2
Concrete Slab or Underfloor Inspection
To be made after all in-slab service equipment is in place but before any concrete is poured, or after all service equipment is installed in a crawlspace.
- 3
Frame Inspection
To be made after the roof, all framing, fire blocking, and bracing are in place; all vents, chimneys, ductwork, and piping are in place; rough-in plumbing and rough-in electrical must be approved.
- 4
Energy Conservation Inspection
To be made after all air barriers, ceiling and wall insulation, floor insulation or crawlspace insulation, HVAC, and basement insulation are installed.
- 5
Gypsum Board Inspection
To be made after all gypsum board is in place but before any plastering is applied to joints and fasteners.
- 6
Final Inspection
To be made after the building is substantially completed and ready for occupancy; a Certificate of Occupancy is required before the building can be used. Per the City's Inspection Record card, the permit holder must notify the building official when work is ready for inspection.
See the full Troy inspection guide — scheduling & re-inspection fees →
Tips
- The City's Inspection Record card in the current public-facing packet still cites '2009 IBC-IRC' even though the statewide code now in force is the 2021 edition — call Building Inspector David Jones at (406) 295-9851 to confirm current applicable figures before finalizing a budget.
- Separate electrical, plumbing, and mechanical permits are always required from the State of Montana DLI Building Codes Bureau (not the City) for any Troy project, since the City is not certified in those trades.
- Fences under 6 feet, play houses/storage sheds under 120 square feet, cosmetic finish work, residential re-siding, retaining walls under 4 feet, and walks/slabs/flat work under 30 inches above grade do not require a City building permit.
- Troy's fee table includes a $1,000,000-$5,000,000 valuation tier and a $5,000,001-and-over tier not seen printed on Libby's otherwise-identical fee schedule — confirm the exact tier structure directly if your project involves a very large valuation.
Frequently asked questions
Sources & verification
Verified against official sources. Last reviewed 2026-07-04.
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 Troy building department before you submit. PermitBase is an independent reference and is not affiliated with any government agency.
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