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Residential Addition / Remodel Permit in Unincorporated Campbell County, Wyoming

Required for additions, alterations, and remodels to existing one- and two-family dwellings in unincorporated Campbell County. Governed by the 2024 IRC per Chapter 4 Section 4. Same no-fee structure and exemption logic as new construction applies (the platted-subdivision Building Permit requirement, and the rural-property exemption, both govern additions/remodels the same way they govern new construction).

Verified 2026-07-01 · Source

When you need this permit

  • Building Permit & Zoning Certificate Application, marked 'Update/Expansion of Existing Structure' or 'Interior Remodel Only'
  • Site plan showing the existing structure(s), proposed addition footprint, and setbacks
  • Foundation plans and soils report if new footings are part of the addition and the property is in a platted subdivision
  • Electrical, mechanical, and plumbing permits as applicable for any trade work included in the remodel

Required documents

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Fee schedule

Residential Addition/Remodel PermitChapter 4 Section 1.8.E 'All Other Permits: No fees.'
No fee

Review timeline

Plan reviewUnincorporated Campbell County’s published plan-review target
3–10 business days

How long did your Residential Addition / Remodel Permit permit actually take in Unincorporated Campbell County?

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

Inspection process

  1. 1

    Footing/Foundation (if new footings)

    Before concrete pour

  2. 2

    Rough-In (framing, electric, plumbing, HVAC)

    Before walls closed

  3. 3

    Final

    All work complete per approved plans

See the full Unincorporated Campbell County inspection guide — scheduling & re-inspection fees →

Tips

  • The same Building Permit & Zoning Certificate Application form used for new construction is used for additions/remodels — just check the appropriate 'Application Type' box.
  • There is no fee for the building permit portion of an addition/remodel in the unincorporated county.

Frequently asked questions

Yes if it involves structural, electrical, plumbing, or mechanical work — submit a Building Permit & Zoning Certificate Application marked 'Interior Remodel Only.' There is no fee for the permit.

In Unincorporated Campbell County, the published Residential Addition/Remodel Permit is: No fee. These are the jurisdiction's own published figures — see the fee schedule table and source citations on this page.

Unincorporated Campbell County's published plan-review target for a residential addition / remodel permit is 3–10 business days.

You'll need: Building Permit & Zoning Certificate Application; Site Plan. See the required-documents checklist on this page for details on each.

Unincorporated Campbell County requires 3 inspection(s) for a residential addition / remodel permit, in order: Footing/Foundation (if new footings), Rough-In (framing, electric, plumbing, HVAC), Final. Schedule each through Campbell County Department of Public Works — Building, Planning & Zoning Division ((307) 682-1970).

Apply through Campbell County Department of Public Works — Building, Planning & Zoning Division at 500 S. Gillette Ave., Suite 1500, Gillette, WY 82716. Phone: (307) 682-1970, email: septic@campbellcountywy.gov (Small Wastewater System applications); planning@campbellcountywy.gov (Planning & Zoning); general Public Works (307) 685-8061. Office hours: Mon–Fri, 8:00 a.m.–5:00 p.m.. Official information: https://www.ccgov.net/286/Building-Division.

Unincorporated Campbell County, Wyoming has adopted: 2024 International Building Code (IBC) — including Appendices C and J, adopted by Campbell County Chapter 4 Rules Regulating Construction, Section 3 (Amended June 2026); 2024 International Residential Code (IRC) — including Appendices A, B, C and E, adopted Chapter 4 Section 4 (Amended June 2026); 2024 International Mechanical Code (IMC) — including Appendix A, adopted Chapter 4 Section 5; 2024 International Plumbing Code (IPC) — including Appendices A and B, adopted Chapter 4 Section 6 — NOTE: Campbell County uses the IPC, not the Uniform Plumbing Code; 2024 International Fuel Gas Code (IFGC) — all appendices, adopted Chapter 4 Section 7; 2024 International Fire Code (IFC), adopted Chapter 4 Section 8 (enforced by Campbell County Fire Department for Fire Code permits); 2024 International Existing Building Code (IEBC), adopted Chapter 4 Section 9; National Electrical Code (NFPA 70), 2026 Edition — including Informative Annex H, adopted Chapter 4 Section 10; Liquefied Petroleum Gas Code (NFPA 58), 2020 Edition, adopted Chapter 4 Section 11; Wyoming DEQ Water Quality Rules and Regulations Chapter 25 (Septic Tanks, Soil Absorption Systems, and Other Small Wastewater Systems) — adopted as Chapter 4 Appendix 1, administered by Campbell County under delegated authority from Wyoming DEQ (W.S. 35-11-304). Local amendments apply — see the Unincorporated Campbell County overview page for the full list.

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

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Residential Addition / Remodel Permit in other cities

Casper, WyomingCheyenne, WyomingEvanston, WyomingGillette, WyomingGreen River, WyomingJackson, WyomingLaramie, WyomingRiverton, Wyoming

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