Do I need a permit to finish my basement in Gillette?

Yes, a building permit is required, but City Code § 5-IV-1(b) waives the building permit fee for basement finishes (since the square footage was already charged on the original permit). Plumbing and mechanical permits are also fee-free unless special circumstances apply (e.g., a new water heater or furnace, or opening the floor for new drain lines). A standard-fee electrical permit is required for new circuits/wiring/outlets.

How much does a remodel permit cost in Gillette?

Miscellaneous residential permits (remodels, damage repair, residing) are a flat $20.00 fee per City Code § 5-IV-1(b). True additions that add square footage are charged under the same tiered building-square-footage table used for new construction.

Residential Addition / Remodel Permit in Gillette, Wyoming

Verified

Required for additions, structural alterations, remodels, and miscellaneous residential repairs to existing one- and two-family dwellings in Gillette. Governed by the 2024 IRC (City Code § 5-I-3); fee for additions follows the same building-square-footage table as new construction, while miscellaneous remodels/repairs use a flat $20 fee.

Verified 2026-07-01 · Source

$30–$150+$0.04/sq ft — same tiered table as new constructionBuilding Permit Fee — additions (by resulting building square footage)

When you need this permit

Additions are permitted under the same building-square-footage fee table as new construction
Miscellaneous residential work (remodels, damage repair, residing) is a flat-fee permit
Structural additions require stamped plans/calculations as applicable
Applications submitted via EnerGov Self Service portal
Plot plan required for zoning review of additions that change the building footprint

Required documents

Req
Building Permit Application (via EnerGov Self Service)
Online application for addition/remodel scope
Req
Plot Plan
Required for additions that change the building footprint; example provided in the Residential Addition Guide
Req
Construction Drawings
Scope, dimensions, structural details, connection to existing structure per the Residential Addition Guide

Fee schedule

Fee type	Amount	Notes
Building Permit Fee — additions (by resulting building square footage)	$30–$150+$0.04/sq ft — same tiered table as new construction	City Code § 5-IV-1(b), Building Square Feet fee schedule
Miscellaneous Residential (remodels, damage, repair, or residing)	$20.00	City Code § 5-IV-1(b)
Basement finish — building permit fee	Waived (no charge)	City Code § 5-IV-1(b): a building permit is still required to finish a basement, but the building permit fee itself is waived since the square footage was already charged under the original permit; plumbing/mechanical permits to finish the basement are also fee-free unless special circumstances apply (new water heater/furnace, opened floor for drain lines). A standard electrical permit at the standard fee IS required for new circuits/wiring/outlets.

Review timeline

~0–10 business days

Typical estimate — confirm current times with the Gillette building department

Inspection process

1
Footing / Foundation (if new footings)
Before concrete pour, per soils engineer verification
2
Rough Plumbing / Electric / Mechanical / Gas
Before walls closed
3
Rough Framing
After rough MEP/gas complete and structure weather-tight
4
Final
All work complete per approved plans

Tips

Miscellaneous residential repairs, remodels, and residing are a flat $20 permit — much simpler than the square-footage table used for true additions.
Basement finishes get a free building permit fee waiver, but a permit is still legally required — don't skip applying just because there's no fee.
A standard-fee electrical permit is still required for a basement finish even though the building/plumbing/mechanical fees are typically waived.

Frequently asked questions

Do I need a permit to finish my basement in Gillette?: Yes, a building permit is required, but City Code § 5-IV-1(b) waives the building permit fee for basement finishes (since the square footage was already charged on the original permit). Plumbing and mechanical permits are also fee-free unless special circumstances apply (e.g., a new water heater or furnace, or opening the floor for new drain lines). A standard-fee electrical permit is required for new circuits/wiring/outlets.
How much does a remodel permit cost in Gillette?: Miscellaneous residential permits (remodels, damage repair, residing) are a flat $20.00 fee per City Code § 5-IV-1(b). True additions that add square footage are charged under the same tiered building-square-footage table used for new construction.

Sources & verification

Verified against official sources. Last reviewed 2026-07-01.

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

Other permits in Gillette

Residential Building Permit (New Construction)Electrical Permit Plumbing Permit Mechanical / HVAC Permit Roofing Permit (Reroof)Solar PV Permit Accessory Dwelling Unit (ADU) Permit Demolition Permit Commercial Tenant Improvement / Commercial Building Permit Deck Permit Basement Finish Permit

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