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Solar Energy System — On-Site (Rooftop/Ground-Mount PV) — Zoning Permit in Unincorporated Sweetwater County, Wyoming

Sweetwater County has no separate building-code solar permit (the county has no IBC/IRC building-code enforcement program at all — see zoning-construction-permit). A small on-site solar energy system (roof-mounted under 5 kW nameplate capacity, or ground-mounted with a footprint under 50% of the primary structure) is classified as a Residential or Non-Residential Accessory Use in the 2015 Zoning Resolution (Amended 2/18/25) and is permitted through the same Zoning Permit process as other construction, subject to dedicated solar design standards (height, setback, UL listing, glare). This is distinct from a large commercial 'Solar Energy Facility' (rated capacity over 0.5 MW), which requires a full Conditional Use Permit with siting review, fencing, 1.25-mile residential setback, and Growth Management Area exclusion — out of scope for typical rooftop/residential PV.

Verified 2026-07-20 · Source

When you need this permit

  • On-site solar energy system defined as: roof-mounted with total nameplate capacity under 5 kW, OR ground-mounted with a footprint under 50% of the primary structure's footprint (2015 Zoning Resolution §4.B.3.g)
  • Building- or roof-mounted systems must not exceed the maximum allowed height in the applicable zoning district
  • Ground- or pole-mounted systems must not exceed 15 feet in height at maximum tilt, may not extend into the front/side/rear setback at minimum design tilt, and the total ground-mounted array area may not exceed 10% of the lot/parcel area
  • Electric solar components must have UL listing and comply with the National Electrical Code
  • Panels must be placed so concentrated solar radiation/glare is not directed onto nearby properties or roadways
  • Apply through the Land Use Department's 'Construction' zoning-permit application (same application used for general construction) — no separate solar-specific application form was found published
  • A Solar Energy Facility (commercial, rated capacity over 0.5 MW) is a fundamentally different, much larger-scale use requiring a Conditional Use Permit, perimeter fencing, 1.25-mile setback from residential properties/zoning, 40-acre minimum lot size, and exclusion from the Growth Management Area and Greater Sage Grouse Core Areas — not applicable to typical residential/rooftop PV

Required documents

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Fee schedule

Zoning Permit — Residential districts (RR, R-1, R-2, R-2/SF, R-3, MH, and residential uses in A district)2015 Zoning Resolution Amended 2/18/25, Section H.I.1 — flat zoning-permit fee; on-site solar is an accessory use in these residential districts and was not found to carry a separate, higher fee line. Confirmed by direct PDF text extraction of the county's own published Zoning Resolution.
$50.00
Accessory Use Structures — Non-Residential districts2015 Zoning Resolution Amended 2/18/25, Section H.L.2 — applies where an on-site solar system is installed as an accessory use on non-residential (commercial/industrial/agricultural) zoned property
$500.00
Late Application Fee (if construction starts before permit approval) — Residential / Non-Residential2015 Zoning Resolution Amended 2/18/25, Section H
$500.00 / $1,000.00

Review timeline

Plan reviewTypical estimate — confirm current times with the Unincorporated Sweetwater County building department
~5–20 business days

How long did your Solar Energy System — On-Site (Rooftop/Ground-Mount PV) — Zoning Permit permit actually take in Unincorporated Sweetwater County?

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

Inspection process

    Tips

    • There is no separate 'solar permit' fee or application in unincorporated Sweetwater County — a small rooftop or ground-mount system is processed as an accessory use under the same $50 residential Zoning Permit (or $500 non-residential Accessory Use fee) as any other construction.
    • Because the county has no IBC/IRC building-code enforcement program (see zoning-construction-permit), there is no county-level electrical plan review of the PV interconnection itself — electrical wiring permits for the system go through the Wyoming State Fire Marshal's statewide electrical program (see electrical-permit), not the county.
    • Do not confuse a small residential/rooftop system with a 'Solar Energy Facility' — the latter is a commercial-scale (>0.5 MW) use requiring a Conditional Use Permit, 40-acre minimum lot, 1.25-mile setback from residential zoning, and exclusion from the Growth Management Area.

    Frequently asked questions

    No separate solar permit exists. A qualifying on-site system (roof-mounted under 5 kW, or ground-mounted under 50% of the primary structure's footprint) is processed as an accessory use through the same Zoning Permit application used for general construction, at the standard $50 residential zoning-permit fee. It must still meet the Zoning Resolution's solar-specific height, setback, UL-listing, and glare standards.

    In Unincorporated Sweetwater County, the published Zoning Permit — Residential districts (RR, R-1, R-2, R-2/SF, R-3, MH, and residential uses in A district) is: $50.00. Additional published fees: Accessory Use Structures — Non-Residential districts — $500.00; Late Application Fee (if construction starts before permit approval) — Residential / Non-Residential — $500.00 / $1,000.00. These are the jurisdiction's own published figures — see the fee schedule table and source citations on this page.

    Plan review for a solar energy system — on-site (rooftop/ground-mount pv) — zoning permit in Unincorporated Sweetwater County typically runs 5–20 business days. This is an estimate, not a published figure — confirm current review times with Sweetwater County Land Use Department (Planning & Zoning) at (307) 872-3914.

    You'll need: Construction & Address Permit Application (Zoning Permit); Site plan. See the required-documents checklist on this page for details on each.

    Apply through Sweetwater County Land Use Department (Planning & Zoning) at 80 W. Flaming Gorge Way, Suite 23, Green River, WY 82935. Phone: (307) 872-3914, email: binghame@sweetwatercountywy.gov. Office hours: Monday - Friday, 8:00 am - 5:00 pm. Official information: https://www.sweetwatercountywy.gov/departments/land_use/index.php.

    Unincorporated Sweetwater County, Wyoming has adopted: No countywide building code and no county building permit for private construction. Sweetwater County has not taken delegated building-code enforcement authority under Wyoming Statute 35-9-121; the Wyoming Dept. of Fire Prevention & Electrical Safety's "Local and State Jurisdictions" chart lists Sweetwater County BLDG INSP/PR as state (S/S), meaning the State Fire Marshal, not the county, holds building-code jurisdiction (https://wsfm.wyo.gov/electrical-safety, chart updated 7/7/2026, re-verified 2026-07-16 — Sweetwater County row still reads Fire Insp L / Fire PR S / Bldg Insp S / Bldg PR S / Elec Insp S / Elec PR S; Rock Springs (L across the board) and Green River (Bldg Insp L, all else S) are separate incorporated-city rows and do not apply to this unincorporated-county file).; Confirmed independently on the county's own site: the Land Use Department's page states construction in unincorporated Sweetwater County requires an approved ZONING permit (not an IBC/IRC building-code permit) — 'All residential, commercial, industrial and mineral construction and use in the unincorporated areas of Sweetwater County requires an approved zoning permit' (https://www.sweetwatercountywy.gov/departments/land_use/index.php).; The county's own Development Codes page lists only land-use/zoning instruments — the 2015 Zoning Resolution, Growth Management Plan, Subdivision Regulations, Comprehensive Plan, and Federal Lands and Resources Plan — with no adopted IBC/IRC/NEC building-code edition (https://www.sweetwatercountywy.gov/departments/land_use/development_codes.php)..

    An on-site system is a small system serving the property itself (roof-mounted under 5 kW or ground-mounted under 50% of the primary structure's footprint), processed as a routine accessory-use zoning permit. A Solar Energy Facility is a commercial-scale project with a rated capacity over 0.5 MW, subject to a full Conditional Use Permit process, 40-acre minimum lot size, fencing, a 1.25-mile setback from residential zoning/properties, and other siting standards under Section 2039 of the Zoning Resolution.

    Sources & verification

    Verified against official sources. Last reviewed 2026-07-20.

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

    Other permits in Unincorporated Sweetwater County

    Zoning/Construction Permit (Land Use) — not a building-code permitSeptic / Small Wastewater System PermitCounty Access / Driveway Permit (Public Works — Engineering)Electrical Wiring Permit (State Program)EV Charger / EVSE PermitSign PermitFire Protection System (Fire Alarm / Fire Sprinkler) Plan Review — State ProgramChange of Use / Establishment Permit (Zoning — No Construction)

    Solar Energy System — On-Site (Rooftop/Ground-Mount PV) — Zoning Permit in other cities

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