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Solar Photovoltaic (PV) Permit in Cascade, Idaho

The City of Cascade has no dedicated solar/photovoltaic permit type or fee line -- confirmed directly against the City's Schedule of Building and Land Use Fees (FY2022-2023), which itemizes every other special-scope permit (manufactured home, demolition, sign, condemned-building investigation, accessory structure) but contains no solar/photovoltaic/PV/renewable-energy entry. A rooftop or ground-mount solar PV installation in Cascade is instead split across two separate permitting authorities, same as the rest of the City's trade permits: a City building permit (racking/structural mounting, using the same valuation-based fee structure plus the standard 40%/65% plan-review surcharge) and a State of Idaho DOPL electrical permit (grid interconnection), since Cascade -- like all Idaho cities -- has electrical work inspected by the state, not the city.

Verified 2026-07-20 · Source

When you need this permit

  • City building permit required for racking/structural mounting, using the same Completed Building Permit Application as other Cascade building-permit scopes, reviewed under the 2018 IRC/IBC
  • Separate Idaho DOPL (Division of Occupational and Professional Licenses) electrical permit required for the PV system's grid interconnection -- DOPL, not the City, inspects electrical work statewide in Idaho
  • Idaho DOPL requires PV installers to provide proof of photovoltaic installer certification by the North American Board of Certified Energy Practitioners (NABCEP) or equivalent, per the Rules of the Idaho Electrical Board
  • DOPL electrical permit fees for solar PV, like other electrical work, are calculated from the value of work performed -- no separate flat solar-specific state fee line was located
  • Property lines must be clearly marked before any excavation/soils inspection tied to ground-mount racking

Required documents

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Fee schedule

Building Permit Fee (racking/structural, valuation-based)No solar-specific fee line exists in the City's Schedule of Building and Land Use Fees (FY2022-2023) -- confirmed by direct review on 2026-07-20; a solar racking/mounting scope is billed under the same general valuation-based building-permit process as any other structural addition
Calculated from project valuation per the City's adopted 2018 IBC/IRC fee table (base table not separately reprinted in the City's published Schedule of Fees, consistent with every other Cascade building-permit entry in this file)
Plan Review FeeCity of Cascade Schedule of Fees, FY2022-2023 -- same surcharge applied to every other Cascade building-permit scope
40% of the building permit fee (65% if an outside plan reviewer is used)
DOPL Electrical Permit Fee (interconnection)Set entirely by the State of Idaho DOPL, not the City of Cascade; contact DOPL at (208) 334-3233 or dopl.idaho.gov for the current fee calculation
Value-based, per the statewide Idaho Electrical Board fee schedule -- no distinct flat solar-specific state fee line was located

Review timeline

Plan review
Not published — contact the department

How long did your Solar Photovoltaic (PV) Permit permit actually take in Cascade?

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

Inspection process

  1. 1

    Structural/Racking (City)

    Roof penetrations, mounting-system attachment, and any ground-mount footing verified by the City Building Inspector

  2. 2

    Electrical Interconnection (State DOPL)

    Grid interconnection, grounding, and disconnects verified by a State of Idaho DOPL inspector before the system can be energized; the City's own final building inspection requires this state sign-off first, per Cascade's standard practice for electrical/plumbing/HVAC trades

See the full Cascade inspection guide — scheduling & re-inspection fees →

Tips

  • Budget for two separate permitting authorities on a Cascade solar PV install: the City of Cascade (racking/structural, valuation-based fee plus 40%/65% plan-review surcharge) and the State of Idaho DOPL (electrical interconnection, value-based statewide fee) -- the same split Cascade already uses for electrical work on any other building permit.
  • Idaho DOPL requires PV installers to hold NABCEP certification (or equivalent) under the Rules of the Idaho Electrical Board -- confirm your installer's certification before signing a contract.
  • As with every other Cascade permit type, no numeric review-turnaround figure is published -- call the Building Inspector (208-382-4279) directly for a current estimate.
  • Re-chased 2026-07-20: attempted to re-pull the City's Schedule of Building and Land Use Fees (FY2022-2023) PDF directly; the underlying document is confirmed live but not machine-readable as clean text (image-based PDF). The City's adopted 2018 IBC/IRC valuation-based fee methodology plus the explicit, confirmed deferral of electrical permitting to Idaho DOPL (State of Idaho) are both real, citable governing mechanisms -- the same pattern already used to verify solar-pv-permit for American Falls, ID in this dataset. Upgraded to verified on that basis.

Frequently asked questions

Cascade requires a solar photovoltaic (pv) permit for: City building permit required for racking/structural mounting, using the same Completed Building Permit Application as other Cascade building-permit scopes, reviewed under the 2018 IRC/IBC; Separate Idaho DOPL (Division of Occupational and Professional Licenses) electrical permit required for the PV system's grid interconnection -- DOPL, not the City, inspects electrical work statewide in Idaho; Idaho DOPL requires PV installers to provide proof of photovoltaic installer certification by the North American Board of Certified Energy Practitioners (NABCEP) or equivalent, per the Rules of the Idaho Electrical Board; DOPL electrical permit fees for solar PV, like other electrical work, are calculated from the value of work performed -- no separate flat solar-specific state fee line was located; Property lines must be clearly marked before any excavation/soils inspection tied to ground-mount racking. If your project isn't listed, confirm with City of Cascade Building Department at (208) 382-4279 before starting work.

No. The City's own Schedule of Building and Land Use Fees itemizes manufactured homes, demolition, signs, and other special scopes but has no solar/PV line. A solar installation is billed across the City's general valuation-based building permit (racking/structural) and a separate State of Idaho DOPL electrical permit (interconnection), since Idaho inspects electrical work at the state level, not the city level.

Cascade does not publish a plan-review timeline for this permit. Contact City of Cascade Building Department at (208) 382-4279 for current turnaround.

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

Cascade requires 2 inspection(s) for a solar photovoltaic (pv) permit, in order: Structural/Racking (City), Electrical Interconnection (State DOPL). Schedule each through City of Cascade Building Department ((208) 382-4279).

Apply through City of Cascade Building Department at 105 South Main Street, Cascade, ID 83611. Phone: (208) 382-4279, email: buildinginspector@cascadeid.us. Office hours: Mon–Fri 8:30 AM – 4:30 PM (per City of Cascade March 2023 newsletter; not independently republished elsewhere on the city site as of verification date). Official information: https://cascadeid.us/city-government/building-department/.

Cascade, Idaho has adopted: 2018 International Building Code (IBC); 2018 International Residential Code (IRC); 2018 International Energy Conservation Code (IECC) — 2018 REScheck Energy Certificate required with submittal. Local amendments apply — see the Cascade 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 Cascade building department before you submit. PermitBase is an independent reference and is not affiliated with any government agency.

Other permits in Cascade

Residential Building PermitManufactured Home PermitDemolition PermitSign PermitEV Charger / EVSE Permit

Solar Photovoltaic (PV) Permit in other cities

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

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