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Solar Permit in Unincorporated Jefferson County, Idaho

Unlike some other Idaho counties in this corpus, Jefferson County issues its own distinct county-level 'Solar Permit' (internal Permit Type code BP-SOLAR) for residential rooftop and ground-mounted PV installations in unincorporated Jefferson County, processed through the same Cityworks portal and valuation-based Total Valuation fee formula as the county's general Residential Building Permit. This is directly confirmed by the county's own published April 2026 Monthly Building Statistic Report, which lists three separate BP-SOLAR 'Solar Permit' cases issued that month (case numbers 26-0113, 26-0133, 26-0160), with recorded system valuations of $35,000 and $25,000. As with all other trades in unincorporated Jefferson County, the electrical interconnection portion is separately permitted and inspected by the Idaho Division of Occupational and Professional Licenses (DOPL), not the county.

Verified 2026-07-20 · Source

When you need this permit

  • Solar Permit (BP-SOLAR) required for rooftop or ground-mounted PV installations in unincorporated Jefferson County — confirmed as an actively issued, distinct county permit type via the county's own April 2026 Monthly Building Statistic Report
  • Apply through the Jefferson County Cityworks public portal (same portal used for the Residential Building Permit), following the same general application requirements: site plan, project valuation, and contractor information (Idaho Contractor's License or Contractor Exemption form for owner-installers) Contractor
  • Recorded warranty deed or other proof of ownership/authorization to build, per the county's standard building-permit application package
  • Electrical interconnection (arrays, inverters, point of connection) requires a separate Idaho DOPL Electrical Permit — not issued by Jefferson County — per the same statewide DOPL mechanism documented for other Idaho counties in this corpus
  • Access Permit from Jefferson County Public Works (county roads) or Idaho Transportation Department (state highways) if the project requires new/modified access
  • If in a mapped flood zone: Flood Plain Development Permit and Elevation Certificate

Required documents

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Fee schedule

Building permit fee — Total Valuation (same fee-bracket formula as the general Residential Building Permit)Jefferson County Fee Schedule 2026, Exhibit A (adopted 4-6-2026). No distinct 'solar' valuation rate is published in the Fee Schedule — BP-SOLAR permits use the same general Total Valuation table as other building permits, confirmed by real recorded valuations ($35,000 and $25,000) in the county's own April 2026 Monthly Building Statistic Report.
Valuation-based per Jefferson County Fee Schedule 2026, Exhibit A — e.g. $75.96 for the first $2,000 plus $12.13 per additional $1,000 up to $40,000 (a typical range for the $25,000-$35,000 system valuations recorded in the county's own April 2026 permit log)
Plan Review Fee, GIS/Mapping Fee, Technology Fee, Inspection FeeJefferson County Fee Schedule 2026, Exhibit A — same add-on fees documented for the general Residential Building Permit, applicable to every building-permit-type application including BP-SOLAR.
15% of Building Permit Fee (Plan Review) + $30 (GIS/Mapping) + $30 (Technology) + $90 (Inspection)
DOPL Electrical Permit (interconnection, separate from the county Solar Permit)Rules of the Idaho Electrical Board, IDAPA 24.39.10 — issued by DOPL, not Jefferson County, per the same statewide mechanism documented for unincorporated Gem County in this corpus.
Statewide Idaho Electrical Board fee schedule — 'Other Installations': wiring cost up to $10,000: $60 + 2%; $10,001-$100,000: $260 + 1% of excess; plus a $65/hr (1-hr minimum) plan review fee for grid-tied systems

Review timeline

Plan reviewUnincorporated Jefferson County’s published plan-review target
15–15 business days

How long did your Solar Permit permit actually take in Unincorporated Jefferson County?

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

Inspection process

  1. 1

    Layout / Footing (ground-mount only)

    For ground-mounted arrays requiring foundation work; roof-mounted systems typically proceed directly to framing/mounting inspection

  2. 2

    State Rough-In Electrical Inspection

    Performed by Idaho DOPL, not the county — verifies wiring, combiners, and disconnects before concealment

  3. 3

    State Final Electrical Inspection

    Final DOPL sign-off on the interconnection and point of connection

  4. 4

    Final Inspection by Building Department

    County sign-off on the mounting/structural work and overall permit closeout; minimum 24 hours' notice required to schedule

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

Tips

  • Jefferson County is one of the few counties in this corpus's Idaho coverage to issue its own distinct 'Solar Permit' (BP-SOLAR) building-permit case type, rather than treating solar purely as a DOPL-only electrical matter — confirmed by real, recently-issued permit records (3 solar permits in April 2026 alone), not just a policy statement.
  • Budget for BOTH the county's valuation-based Solar Permit (plus its 15% plan review, $30 GIS, $30 technology, and $90 inspection fees) AND a separate Idaho DOPL Electrical Permit for the interconnection wiring — these are two distinct permits from two distinct agencies.
  • Owner/self-contractor solar installations are permitted in Jefferson County — real April 2026 case records show at least one BP-SOLAR permit issued to an owner/self-contractor alongside others issued to a licensed solar contractor (Big Dog Renewable Energy LLC).

Frequently asked questions

Unincorporated Jefferson County requires a solar permit for: Solar Permit (BP-SOLAR) required for rooftop or ground-mounted PV installations in unincorporated Jefferson County — confirmed as an actively issued, distinct county permit type via the county's own April 2026 Monthly Building Statistic Report; Apply through the Jefferson County Cityworks public portal (same portal used for the Residential Building Permit), following the same general application requirements: site plan, project valuation, and contractor information (Idaho Contractor's License or Contractor Exemption form for owner-installers); Recorded warranty deed or other proof of ownership/authorization to build, per the county's standard building-permit application package; Electrical interconnection (arrays, inverters, point of connection) requires a separate Idaho DOPL Electrical Permit — not issued by Jefferson County — per the same statewide DOPL mechanism documented for other Idaho counties in this corpus; Access Permit from Jefferson County Public Works (county roads) or Idaho Transportation Department (state highways) if the project requires new/modified access; If in a mapped flood zone: Flood Plain Development Permit and Elevation Certificate. If your project isn't listed, confirm with Jefferson County Planning, Zoning & Building Department at 208-745-9220 before starting work.

There is no separate published solar rate — the county's Solar Permit (BP-SOLAR) uses the same valuation-based Total Valuation fee table as its general Building Permit (e.g., roughly $75.96 plus $12.13 per additional $1,000 for a system valued between $2,000 and $40,000), plus the standard 15% plan review fee, $30 GIS fee, $30 technology fee, and $90 inspection fee. A separate DOPL Electrical Permit fee applies for the interconnection wiring. Source: Jefferson County Fee Schedule 2026, Exhibit A.

Unincorporated Jefferson County's published plan-review target for a solar permit is 15–15 business days.

You'll need: Building Permit Application (Cityworks Public Portal, BP-SOLAR permit type); Idaho Contractor's License or Contractor Exemption Form. See the required-documents checklist on this page for details on each.

Unincorporated Jefferson County requires 4 inspection(s) for a solar permit, in order: Layout / Footing (ground-mount only), State Rough-In Electrical Inspection, State Final Electrical Inspection, Final Inspection by Building Department. Schedule each through Jefferson County Planning, Zoning & Building Department (208-745-9220).

Apply through Jefferson County Planning, Zoning & Building Department at 210 Courthouse Way, Suite 170, Rigby, ID 83442. Phone: 208-745-9220. Office hours: Mon–Fri 9:00 AM – 5:00 PM. Official information: https://www.jcgov.us/231/Planning-Zoning-Building.

Unincorporated Jefferson County, Idaho has adopted: 2018 International Building Code (IBC) — adopted by Jefferson County Ordinance 2022-02, effective March 7, 2022; 2018 International Residential Code (IRC) — adopted by Jefferson County Ordinance 2022-02, effective March 7, 2022. Local amendments apply — see the Unincorporated Jefferson County overview page for the full list.

Yes. Jefferson County issues a distinct 'Solar Permit' (internal type code BP-SOLAR) through its Cityworks portal, valued and fee'd under the same Total Valuation formula as its general Building Permit. This is confirmed by real case records in the county's own April 2026 Monthly Building Statistic Report. Separately, the electrical interconnection work still requires an Idaho DOPL Electrical Permit, since Jefferson County does not issue electrical permits itself. Source: Jefferson County Planning, Zoning & Building Department, April 2026 Monthly Building Statistic Report.

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

Other permits in Unincorporated Jefferson County

Residential Building Permit (Single-Family Dwelling / New Construction, Additions, ADUs)EV Charger / EVSE Permit

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