ADU Construction in Gillette, WY
Accessory dwelling units, garage conversions and in-law suites in Gillette, WY: tell us the job once and we connect you with a contractor for it. Accessory dwelling units built to code - detached builds, garage conversions and basement suites - from feasibility and zoning through final occupancy. Gillette has a mixed housing stock: 51% detached houses, 8% attached or townhouse units and 15% in buildings of five or more units.
- No obligation on quotes
- Local permit knowledge
- Clear change-order process
- Licensed and insured contractors only
ADU Construction cost in Gillette
Typical Gillette range: $85,000 - $310,000 per unit. Reflects Wyoming labor and material costs. Estimate for planning, not a quote - call (844) 624-3161 for a written scope.
An ADU is a zoning project before it is a construction project. Setbacks, lot coverage, parking relief, owner-occupancy rules and utility capacity decide what can legally go on your lot, and they vary street by street.
Deep frost depth and heavy snow load shape everything structural here, from footing depth to ice-dam protection at the eaves.
Garage conversions read as the cheap route and often are, but the slab usually sits below the required floor height and lacks a moisture barrier, so the real scope includes the floor system most quotes leave out.
What the job includes
- Zoning and feasibility review
- Plan sets and permit submittal
- Detached, attached and garage conversions
- Separate utility metering
- Kitchen and bath rough-in
- Final inspection and occupancy sign-off
Homes in Gillette and adu construction work
Public figures for the city of Gillette in Campbell County, not the metro, and the general practice that follows.
Gillette has a mixed housing stock: 51% detached houses, 8% attached or townhouse units and 15% in buildings of five or more units.1 On a mixed stock, feasibility turns on the individual lot - detached houses on larger parcels are the usual candidates; attached homes rarely qualify. Building permits in Gillette are normally issued by the city building department.2,3 ADU plan review and permits go through the city building department; the contractor prepares the plan set and submits it.
73% of occupied homes in Gillette are owner-occupied (72% statewide).1 Most of Gillette's housing is recent: only 31% of units predate 1980 (U.S. 50%) and 16% were built since 2010.1 Gillette sits in IECC climate zone 6B (Cold).4 In this cold climate zone, foundation insulation and air sealing are major energy-code items for a new unit.
The median owner-occupied home in Gillette is valued at $264,500 (ACS), below the Wyoming median of $309,700.1 With values below the state median, phased scopes - the essential work first - are a common way to keep a project sensible. Heating dominates the year: about 7,497 heating degree days against 519 cooling degree days (base 65°F).5,6 In a heating-led climate, insulation and air sealing carry most of the energy-code weight for any work that opens the envelope.
| Before 1940 | 1.5% |
|---|---|
| 1940-1959 | 1.7% |
| 1960-1979 | 27.5% |
| 1980-1999 | 26.8% |
| 2000-2009 | 26.9% |
| 2010 or later | 15.7% |
Sources and notes (6)
- U.S. Census Bureau, American Community Survey 5-year estimates (ACS 2020-2024 5-year (released 2026-01))
- U.S. Census Bureau population estimates (Vintage 2024)
- U.S. Census Bureau geographic code files (2020)
- Guide to Determining Climate Zones by County: Building America and IECC 2021 Updates (PNNL-33270) (September 2022 (IECC 2021 county map))
- NOAA NCEI U.S. Climate Normals, nearest station (1991-2020 normals (published 2021))
- NOAA NCEI normals station inventory (1991-2020)
- Climate figures are for NOAA station Gillette Campbell Ap, 5.1 miles from the place center; housing figures are ACS ACS 2020-2024 5-year with 90% margins of error in the source tables.
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Gillette and nearby
Requests for Gillette go through our national line, (844) 624-3161; we confirm whether a contractor can take the job. How a referral works.
ADU Construction nearby
Straight-line distances between place centers, not drive times. All ADU Construction in Wyoming
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Open Gillette, WY in Google MapsADU Construction questions in Gillette
How much does adu construction cost in Gillette, WY?
Most adu construction projects in Gillette, WY land between $85,000 and $310,000, depending on scope, access and material grade. That is an estimated range for planning, not a quote - call (844) 624-3161 and we will scope your job properly.
Can I legally build an ADU on my lot?
That depends on your zoning, setbacks, lot coverage and utility capacity. Feasibility review comes first, before any design spend.
What kind of housing does Gillette have?
Gillette has a mixed housing stock: 51% detached houses, 8% attached or townhouse units and 15% in buildings of five or more units. 73% of occupied homes in Gillette are owner-occupied (72% statewide). Census figures for the place itself, not the metro.
Who issues building permits in Gillette?
Building permits in Gillette are normally issued by the city building department. Whether a specific job needs one is decided by that office; the contractor confirms it before work starts.
Other services in Gillette
Get a free Gillette ADU Construction quote
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