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Solar Photovoltaic (PV) Permit in Castle Rock, Colorado

Castle Rock's own Development Services Fee Schedule (effective July 1, 2026) has no dedicated solar/photovoltaic fee line -- confirmed directly against the Building Permit Fees page, which itemizes air conditioner/water heater/furnace replacement ($75 each), re-roof permits (based on valuation), demolition ($100), and generators over 5kW ($75), but nothing for solar. A rooftop or ground-mount solar PV installation in Castle Rock is billed across the Town's existing valuation-based Building Permit (racking/structural) and Electrical Permit (interconnection) processes, both issued directly by the Town's Development Services Building Division. The Town's 2023 Colorado Model Electric-Ready and Solar-Ready Code (Municipal Code Chapter 15.15) and local amendment IRC R105.2.4.1 require the electrical rough-in inspection to specifically verify any solar-ready conduit/prewiring to the panel. Any Town-assessed fee is also capped by Colorado's statewide solar permit fee law, C.R.S. § 24-48.5-113 (HB21-1284): $500 residential / $1,000 commercial.

Verified 2026-07-20 · Source

When you need this permit

  • Building Permit required for the racking/structural mounting portion, using the Town's standard valuation-based Building Permit Fee tiers (2024 IRC/IBC as locally amended)
  • Electrical Permit required separately for grid interconnection, governed by the 2026 NEC as locally administered by the Town
  • Where the property has an existing solar-ready zone, the electrical rough-in inspection must verify conduit/prewiring from that zone to the panel, per local amendment IRC R105.2.4.1 (2023 Colorado Model Electric-Ready and Solar-Ready Code, Municipal Code Chapter 15.15)
  • Contractor registration with the Town is required; homeowners may self-permit electrical work only on their own owner-occupied primary residence Owner-builderContractor
  • Any fee the Town assesses is capped by Colorado's statewide solar permit fee law, C.R.S. § 24-48.5-113 (HB21-1284): $500 for a residential system, $1,000 for a commercial system
  • Submitted electronically via the eTRAKiT Development Portal, same as other Castle Rock trade/building permits

Required documents

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Fee schedule

Building Permit Fee (racking/structural, valuation-based)No standalone flat solar fee line was found in the Town's Development Services Fee Schedule (effective July 1, 2026), confirmed by direct review 2026-07-20 -- solar racking/structural work is billed under the same general valuation-based Building Permit Fee tiers as any other structural scope, subject to Colorado's statewide $500 residential / $1,000 commercial solar fee cap (C.R.S. § 24-48.5-113)
$23.50 minimum, scaling per the Town's standard valuation table
Electrical Permit Fee (interconnection, valuation-based)Same standalone-trade-permit fee structure used for other Castle Rock electrical work; also subject to the statewide solar fee cap
$23.50 minimum, scaling per the same valuation table
Plan Review FeeApplies to both the Building and Electrical components, per the Town's Fee Schedule
65% of the Building Permit Fee

Review timeline

Plan review
Not published — contact the department

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

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

Inspection process

  1. 1

    Structural/Racking (Building)

    Roof penetrations and mounting-system attachment verified per the Building Permit

  2. 2

    Electrical Rough-In

    Wiring and conduit verified; if a solar-ready zone was previously installed, conduit/prewiring routing to the panel is specifically checked per local amendment R105.2.4.1

  3. 3

    Final Electrical

    Interconnection, grounding, and disconnects verified per the 2026 NEC before the system is energized

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

Tips

  • Budget for two separate Castle Rock permits on a solar PV install: a Building Permit (racking/structural, valuation-based) and an Electrical Permit (interconnection, valuation-based) -- both subject to the same 65% plan-review surcharge, and both capped by Colorado's statewide $500 residential / $1,000 commercial solar fee law (C.R.S. § 24-48.5-113).
  • If your home already has a solar-ready zone under the 2023 Colorado Model Electric-Ready and Solar-Ready Code, the electrical rough-in inspection specifically checks for conduit/prewiring from that zone to the panel -- plan the rough-in accordingly.
  • Castle Rock is not currently listed as a Colorado SolarAPP+ participating jurisdiction, so an automated/same-day solar plan-review path is not confirmed to be available -- expect the Town's standard eTRAKiT review process instead.
  • Re-chased 2026-07-20: the Town's own Development Services Fee Schedule (effective July 1, 2026) was re-confirmed live and publishes real valuation-based Building/Electrical Permit fee tiers ($23.50 minimum) and a 65% Plan Review surcharge, plus Colorado's statewide solar fee cap (C.R.S. 24-48.5-113) applies as the binding ceiling. Upgraded to verified on that basis.

Frequently asked questions

Castle Rock requires a solar photovoltaic (pv) permit for: Building Permit required for the racking/structural mounting portion, using the Town's standard valuation-based Building Permit Fee tiers (2024 IRC/IBC as locally amended); Electrical Permit required separately for grid interconnection, governed by the 2026 NEC as locally administered by the Town; Where the property has an existing solar-ready zone, the electrical rough-in inspection must verify conduit/prewiring from that zone to the panel, per local amendment IRC R105.2.4.1 (2023 Colorado Model Electric-Ready and Solar-Ready Code, Municipal Code Chapter 15.15); Contractor registration with the Town is required; homeowners may self-permit electrical work only on their own owner-occupied primary residence; Any fee the Town assesses is capped by Colorado's statewide solar permit fee law, C.R.S. § 24-48.5-113 (HB21-1284): $500 for a residential system, $1,000 for a commercial system; Submitted electronically via the eTRAKiT Development Portal, same as other Castle Rock trade/building permits. If your project isn't listed, confirm with Town of Castle Rock Development Services, Building Division at 720-733-3527 before starting work.

No. The Town's own Development Services Fee Schedule has no solar/PV line item. A solar installation is billed across the Town's existing valuation-based Building Permit (racking/structural) and Electrical Permit (interconnection), both subject to Colorado's statewide solar permit fee cap of $500 residential / $1,000 commercial (C.R.S. § 24-48.5-113).

Castle Rock does not publish a plan-review timeline for this permit. Contact Town of Castle Rock Development Services, Building Division at 720-733-3527 for current turnaround.

You'll need: Plan Review and Construction Permit Application (eTRAKiT) -- Building; Plan Review and Construction Permit Application (eTRAKiT) -- Electrical. See the required-documents checklist on this page for details on each.

Castle Rock requires 3 inspection(s) for a solar photovoltaic (pv) permit, in order: Structural/Racking (Building), Electrical Rough-In, Final Electrical. Schedule each through Town of Castle Rock Development Services, Building Division (720-733-3527).

Apply through Town of Castle Rock Development Services, Building Division at 100 N. Wilcox St., Castle Rock, CO 80104. Phone: 720-733-3527, email: buildingcounter@crgov.com. Office hours: Development Services Building Counter (Town Hall): Monday-Friday, 8 a.m. to 5 p.m. Inspection scheduling line: 303-660-1341.. Official information: https://www.crgov.com/1887/Building.

Castle Rock, Colorado has adopted: The Town of Castle Rock is a home-rule municipality that runs its OWN Building Division — it is a separate prequalified building department from Douglas County (confirmed via the Colorado Division of Fire Prevention and Control's Prequalified Building Departments list, which shows both 'Douglas County' and 'Town of Castle Rock' as distinct entries; Joseph Montoya is the Town of Castle Rock's listed prequalified contact, jmontoya@crgov.com, 720-733-2225). Source: Colorado DFPC Prequalified Building Departments list, https://dfpc.colorado.gov/sites/dfpc/files/Current%20Prequalified%20Building%20Departments.pdf; 2024 International Building Code (IBC), as amended by Ordinance No. 2026-017, adopted by Town Council June 2, 2026, effective June 30, 2026 (amending Castle Rock Municipal Code Title 15, Chapter 15.04); 2024 International Residential Code (IRC) for One- and Two-Family Dwellings, as amended by Ordinance No. 2026-017 (Castle Rock Municipal Code Chapter 15.06); 2024 International Plumbing Code (IPC); 2024 International Mechanical Code (IMC); 2024 International Fuel Gas Code (IFGC); 2024 International Fire Code (IFC), enforced by Castle Rock Fire and Rescue Department; 2024 International Existing Building Code (IEBC); 2024 International Swimming Pool and Spa Code (ISPSC); 2021 International Energy Conservation Code (IECC) — Castle Rock has adopted the 2024 editions of most I-Codes but retains the 2021 IECC rather than a newer edition; 2023 Colorado Model Electric-Ready and Solar-Ready Code, adopted by reference as new Castle Rock Municipal Code Chapter 15.15 via Ordinance No. 2026-017; applies to all new residential and commercial buildings and to additions/substantial remodels requiring a building permit; 2026 National Electrical Code (NEC); 2017 ICC A117.1 Accessible and Usable Buildings and Facilities (Ordinance No. 2026-017 adds a new Section 1102, Compliance, specifying the 2017 edition); 1997 Uniform Code for the Abatement of Dangerous Buildings; ASME A17.1-2022 (Safety Code for Elevators and Escalators), ASME A18.1-2020 (Platform Lifts and Stairway Chairlifts), ASME A17.3-2023 (Existing Elevators and Escalators); 2021 Automated People Mover Standards (ASCE 21, Parts 1-4); 2025 Colorado Wildfire Resiliency Code, effective July 1, 2026 (Castle Rock Municipal Code Chapter 15.20, per Ordinance No. 2026-017 amendments); Source for the full current adopted-code list and effective dates: Town of Castle Rock Adopted Building Codes page, https://www.crgov.com/2178/Adopted-Building-Codes, and Ordinance No. 2026-017 (full amendment text), https://www.crgov.com/ArchiveCenter/ViewFile/Item/2870. Local amendments apply — see the Castle Rock 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 Castle Rock building department before you submit. PermitBase is an independent reference and is not affiliated with any government agency.

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