Do I need a building permit to build a home on rural (unplatted) property in Campbell County?

No building permit is required for a one- or two-family dwelling located outside a platted subdivision, per Chapter 4 Rules Regulating Construction § 1.4.A.3. However, you still need electrical, mechanical, plumbing, and Small Wastewater System (septic) permits, a completed Building Permit & Zoning Certificate Application for zoning/addressing purposes, an approved site plan, and proof of your water source.

How much does a residential building permit cost in unincorporated Campbell County?

There is no fee. Per Chapter 4 Section 1.8.E ('All Other Permits'), residential building, electrical, mechanical, plumbing, and small wastewater system permits are issued at no charge. Only Commercial Building Permits carry a $250 fee.

Residential Building Permit (New Construction) in Unincorporated Campbell County, Wyoming

Verified

Required for new single-family and two-family dwellings located INSIDE a Platted Subdivision in unincorporated Campbell County, governed by the 2024 IRC per Chapter 4 Section 4. Building Permits are NOT required for one- or two-family dwellings built OUTSIDE a platted subdivision (Chapter 4 Section 1.4.A.3) — see 'Building a Home on Rural Property' guidance — though electrical, mechanical, plumbing, and septic permits still apply in that case.

Verified 2026-07-01 · Source

No feeResidential Building Permit

When you need this permit

Inside a platted subdivision: Building Permit required; outside a platted subdivision: Building Permit is EXEMPT (Chapter 4 § 1.4.A.3), but electrical/mechanical/plumbing/septic permits are still required
Completed Building Permit & Zoning Certificate Application
Site plan drawn to scale showing setbacks, easements, septic tank/leach field, water/electric service lines, and (for new construction outside a subdivision) driveway mileage to access point
Verification of potable water source: on-lot well permit (WY State Engineer's Office), Shared Well Agreement (signed, notarized, recorded) plus well permit, or Centralized Water System connection letter
Approved Small Wastewater System (septic) permit if not on public sewer
Zoning Certificate (no fee) approved prior to permit issuance for zoned parcels
Inside a platted subdivision: two 24”x36” sets of building plans, plus foundation plans prepared by a Wyoming-licensed Professional Engineer with a soils report
Valid Campbell County-issued address posted before any inspection will be performed
Wyoming 811 (One Call) contacted prior to excavation

Required documents

Req
Building Permit & Zoning Certificate Application
Campbell County Dept. of Public Works application form covering building/site info, applicant info, zoning info, construction info, water source, and sewage disposal method
Req
Site Plan
Drawn to scale or clearly dimensioned; shows north arrow, property lines, structures, wells, septic tank/leach field and future replacement field location, easements/rights-of-way, and utility lines
Opt
Foundation Plans and Soils Report (platted subdivisions)
Foundation plan stamped by a Wyoming-licensed Professional Engineer, with a soils report verifying footing/foundation type
Req
Water Well Permit or Shared Well Agreement
Copy of the State Engineer's Office well permit for the intended use, or a signed/notarized/recorded Shared Well Agreement plus well permit

Fee schedule

Fee type	Amount	Notes
Residential Building Permit	No fee	Campbell County Chapter 4 Rules Regulating Construction, Section 1.8.E 'All Other Permits: No fees.' (Amended June 2026) — applies to one- and two-family residential building permits; only Commercial Building Permits carry the $250 fee under Section 1.8.A.
Zoning Certificate	No fee	Chapter 7 Zoning Regulations, Section 10.25(7)(a)(i)
Work commenced before obtaining required permit	$60.00	Chapter 4 Section 1.8.D

Review timeline

3–10 business days

Unincorporated Campbell County’s published plan-review target

Inspection process

1
Footing
Before concrete pour
2
Stemwall
Foundation stemwall inspection
3
Service Utility Lines
Water, gas, sewer service connections
4
Rough-In (framing, electric, plumbing, HVAC)
After framing and MEP rough-in, before drywall
5
Drywall
Before finishing
6
Small Wastewater System (Septic/Leach field)
Tank, pipe, chambers, and rock left exposed for inspection
7
Final
All work complete; required for Certificate of Occupancy

Tips

If you are building a one- or two-family home OUTSIDE a platted subdivision (rural/acreage property), you do NOT need a Building Permit at all under Chapter 4 § 1.4.A.3 — but you still need electrical, mechanical, plumbing, and septic permits, and you can still opt in to full building inspections to receive a Certificate of Occupancy (useful for lender/mortgage purposes).
There is NO fee for a Certificate of Occupancy in Campbell County, but construction must be compliant with the county's adopted codes.
A jobsite card is issued listing every required inspection — work covered without inspection must be exposed again for inspection.
Call (307) 682-1970 at least 24 hours in advance to schedule inspections; appointments are honored on a first-come, first-served basis.
Campbell County provides two free address plates and two free sets of numbers — install immediately, as inspections will not proceed until the address is posted.

Frequently asked questions

Do I need a building permit to build a home on rural (unplatted) property in Campbell County?: No building permit is required for a one- or two-family dwelling located outside a platted subdivision, per Chapter 4 Rules Regulating Construction § 1.4.A.3. However, you still need electrical, mechanical, plumbing, and Small Wastewater System (septic) permits, a completed Building Permit & Zoning Certificate Application for zoning/addressing purposes, an approved site plan, and proof of your water source.
How much does a residential building permit cost in unincorporated Campbell County?: There is no fee. Per Chapter 4 Section 1.8.E ('All Other Permits'), residential building, electrical, mechanical, plumbing, and small wastewater system permits are issued at no charge. Only Commercial Building Permits carry a $250 fee.

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.

Other permits in Unincorporated Campbell County

Residential Addition / Remodel Permit Electrical Permit Plumbing Permit Mechanical / HVAC Permit Roofing Permit (Reroof)Solar PV Permit Accessory Dwelling Unit (ADU) Permit Demolition Permit Commercial Building Permit / Tenant Improvement Deck Permit

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