Solar Photovoltaic (PV) Permit — Unincorporated Franklin County, Idaho · Requirements sheet
Verified 2026-07-20 · Source: https://codelibrary.amlegal.com/codes/franklincountyid/latest/franklinco_id/0-0-0-1623
PermitBase is an independent reference and is not affiliated with any government agency. Requirements change and vary by project — confirm current details with the building department before you submit.
Solar Photovoltaic (PV) Permit in Unincorporated Franklin County, Idaho
Required for installation of rooftop or ground-mount solar photovoltaic systems in unincorporated Franklin County. No solar-specific fee line item is published; the structural/mounting portion is billed under the same 1% of assessed value Building Permit Fee used for general construction, per Franklin County Code § 150.018. The County's own Building Permit Application packet requires an Electrical Plan as part of the submittal for new construction, but no distinct county-issued electrical permit type is published — consistent with the pattern seen across most other Idaho counties in this database, where electrical interconnection work is routed to the State of Idaho DOPL/Division of Building Safety rather than the county (not independently confirmed for Franklin County specifically in this session).
Verified 2026-07-20 · Source
When you need this permit
- Building Permit Fee is 1% of the assessed value of the proposed building, payable when the application is made, per Franklin County Code § 150.018
- Electrical Plan required as part of the submittal packet, drawn to scale showing all lighting, switches, outlets, meter locations, and inter-connected smoke/carbon monoxide detectors, per the County's own Building Permit Information and Process document
- County Recorder has up to 31 days after receipt of an application to investigate the proposed work (§ 150.017(D)), and a further period to approve, disapprove, or conditionally approve (§ 150.017(E)) — the ordinance text does not make clear whether these periods are concurrent or cumulative
- GENUINE GAP: whether the electrical interconnection permit itself is issued by Franklin County or by the State of Idaho DOPL/Division of Building Safety was not conclusively confirmed on the County's own published pages in this session — confirm directly with the Building Department (208-221-6149) before relying on either path
Required documents
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Fee schedule
Review timeline
Inspection process
- 1
Final Inspection (mounting/roof penetrations)
Racking and roof-penetration compliance verified by Franklin County
See the full Unincorporated Franklin County inspection guide — scheduling & re-inspection fees →
Tips
- Franklin County's Building Permit fee is a flat 1% of assessed value — unlike the tiered valuation tables used by many neighboring Idaho counties, there is no separate rate schedule to look up.
- Confirm directly with the Building Department (208-221-6149 / plans@fcidaho.us) which agency issues the electrical interconnection permit before scheduling a solar installation — this database could not conclusively confirm County vs. State DOPL jurisdiction for Franklin County specifically.
Frequently asked questions
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 Franklin County building department before you submit. PermitBase is an independent reference and is not affiliated with any government agency.
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