Skip to main content
PermitBase

Solar Panel Permit (Panels on Existing Building) in Unincorporated Valley County, Idaho

Valley County has a distinct, flat-fee permit for installing solar panels on an existing building in unincorporated Valley County: 'Solar Panel on Existing Buildings' at $200.00, which the county's own fee schedule states 'includes plan review and inspection.' This is issued through the Building Department using the same Building Permit Application used for other structures, but billed at the flat solar rate rather than the valuation-based table used for new construction. As with all electrical work in unincorporated Valley County, the electrical interconnection itself is separately permitted and inspected by the Idaho Division of Occupational and Professional Licenses (DOPL/Division of Building Safety), not the county.

Verified 2026-07-20 · Source

When you need this permit

  • Building Permit Application submitted to the Valley County Building Department, noting solar panel installation on an existing building
  • Owner signature required on the application (no permit issued without it, per county policy effective November 7, 2022), except for exempted permit types (wood-stove insert, zero-clearance wood fireplace) which do not include solar
  • Site/roof plan showing panel layout and any structural attachment details as requested by the Building Department
  • Electrical permit for the PV interconnection obtained separately from the Idaho Division of Occupational and Professional Licenses (DOPL), not Valley County — see the county's general electrical-trade sourcing under residential-building-permit
  • Applications currently accepted only by mail (PO Box 1350, Cascade, ID 83611) or drop-off at 700 S. Main Street, Cascade — not by email

Required documents

Check off what you have — your progress is saved on this device.

Not ready yet — 0 of 1 required documents checked.

This checker covers one permit. A full project usually triggers several — our paid checklist will assemble all of them, from $29 →

Fee schedule

Solar Panel on Existing Buildings (includes plan review and inspection)Valley County Building Department Fees, Title 6 (PDF, Revised 11/12/2025) — confirmed by direct PDF text extraction; a flat fee distinct from the county's valuation-based building-permit fee table, and stated to already include both plan review and inspection (no separate plan-review-fee line applies to this permit type)
$200.00

Review timeline

Plan reviewTypical estimate — confirm current times with the Unincorporated Valley County building department
~0–20 business days

How long did your Solar Panel Permit (Panels on Existing Building) permit actually take in Unincorporated Valley County?

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

Inspection process

  1. 1

    Final

    Panel mounting and roof attachment verified against approved plans; included in the flat $200.00 fee per the county's own fee-schedule description

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

Tips

  • Valley County's solar fee ($200.00 flat) already includes both plan review and inspection — unlike most other Valley County building permits, no separate 35%/65% plan-review-fee line is added on top.
  • This fee line is titled 'Solar Panel on Existing Buildings' — for a new-construction residence being built solar-ready or with solar installed at the same time, confirm with the Building Department whether the panels are billed under this flat fee or folded into the new-construction valuation.
  • Electrical work for the PV interconnection itself still requires a separate Idaho DOPL electrical permit — the county's $200.00 fee covers only the structural/building-permit side.

Frequently asked questions

Yes. The county's $200.00 solar fee covers the building-permit side (plan review and inspection of the installation on the structure). Electrical work for the PV interconnection is separately permitted and inspected by the Idaho Division of Occupational and Professional Licenses (DOPL), not Valley County.

$200.00 flat, which the county's own fee schedule states includes both plan review and inspection. This applies to solar panels installed on an existing building. Source: Valley County Building Department Fees, Title 6 (PDF, Revised 11/12/2025).

Plan review for a solar panel permit (panels on existing building) in Unincorporated Valley County typically runs 0–20 business days. This is an estimate, not a published figure — confirm current review times with Valley County Building Department at 208-382-7114.

You'll need: Building Permit Application. See the required-documents checklist on this page for details on each.

Unincorporated Valley County requires 1 inspection(s) for a solar panel permit (panels on existing building), in order: Final. Schedule each through Valley County Building Department (208-382-7114).

Apply through Valley County Building Department at 700 S. Main Street, PO Box 1350, Cascade, ID 83611. Phone: 208-382-7114, email: building@valleycountyid.gov. Office hours: Mon–Fri 8:00 AM – 5:00 PM (inspectors available for public assistance 8:00–10:00 AM; remainder of day governed by daily inspection schedule; after-hours/weekend calls go to voicemail). Official information: https://www.co.valley.id.us/departments/Building.

Unincorporated Valley County, Idaho has adopted: 2018 International Residential Code (IRC) — adopted effective January 1, 2021; 2018 International Building Code (IBC) — adopted effective January 1, 2021; 2018 International Energy Conservation Code (IECC) — adopted effective January 1, 2021; Valley County Code Title 6 — Building Codes, Regulations & Permits; Valley County Ordinance # 05-02 — Outdoor Lighting Ordinance; Valley County Ordinance # 6-1-9 — sanitary sewer/septic evidence requirement for habitable buildings; Valley County Flood Damage Prevention Ordinance (FIRM-mapped flood-prone areas); Valley County Best Management Practices (BMP) Ordinance — erosion/sediment control, required before excavation in Riparian Overlay areas. Local amendments apply — see the Unincorporated Valley County overview page for the full list.

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

Other permits in Unincorporated Valley County

Residential Building Permit (New Construction / Addition / Alteration)Manufactured Home PermitDemolition / Removal PermitAgricultural Building PermitElectric Vehicle (EV) Charging Station / EVSE Permit

Solar Panel Permit (Panels on Existing Building) in other cities

American Falls, IdahoAmmon, IdahoBlackfoot, IdahoBoise, IdahoBuhl, IdahoBurley, IdahoCaldwell, IdahoCascade, Idaho

Compare solar panel permit (panels on existing building) fees across Idaho →

Look up this fee in a different city →

Embed this data card →

Now live

Build your Unincorporated Valley County project checklist

Describe your project once and get every permit, document, and fee it triggers in Unincorporated Valley County — in one checklist. Sign up and pay once to generate it, or go unlimited with Pro.

Get started →