Solar Photovoltaic (PV) System Permit in Aspen, Colorado

Aspen requires a solar photovoltaic (pv) system permit for: DC-side wiring must be installed by a Colorado-licensed electrical contractor, a NABCEP-certified contractor, a COSIA-certified contractor, or the homeowner; AC-side wiring must be installed by a Colorado-licensed electrical contractor or the homeowner; A homeowner performing their own wiring must personally do the work on a property not for sale/rent/lease and not generally open to the public, with all work inspected before concealment and again at completion, and full NEC compliance; At time of application: one-line diagram with wire sizing, circuit voltage, voltage drop, grounding, and fusing; manufacturer specifications and installation documents for module, array, combiner box, inverter, mounting hardware, batteries (if applicable), and disconnect; drawings detailing panel azimuth/zenith alignment, equipment elevations, and site plan; proposed PV system kW capacity rating; City of Aspen Electric Department Interconnect Agreement form must be filled out, signed, and approved prior to permit issuance; 'Fully electric new projects qualify for expediting' per the Building Document and Resource Library, which may include solar/battery-paired all-electric projects. If your project isn't listed, confirm with City of Aspen Community Development Department, Building Division at 970-920-5000 before starting work.

In Aspen, the published Electrical Permit Fee (PV installation) is: Computed via the City's Building Permit Fee Estimator (Excel) referencing the current Municipal Code Fee Ordinance (Title 2). These are the jurisdiction's own published figures — see the fee schedule table and source citations on this page.

Aspen's published plan-review target for a solar photovoltaic (pv) system permit is 7–14 business days.

You'll need: Solar/Electrical Permit Application (Salesforce Permit Portal); One-Line Diagram; City of Aspen Electric Department Interconnect Agreement. See the required-documents checklist on this page for details on each.

Aspen requires 2 inspection(s) for a solar photovoltaic (pv) system permit, in order: Rough-In Inspection, Final Inspection. Schedule each through City of Aspen Community Development Department, Building Division (970-920-5000).

Apply through City of Aspen Community Development Department, Building Division at 427 Rio Grande Place, Aspen, CO 81611. Phone: 970-920-5000, email: buildingsupport@aspen.gov. Office hours: City of Aspen main line 970-920-5000. Building Support (permit requirement inquiries, pre-submittal questions): buildingsupport@aspen.gov, Monday-Friday 9:00am-5:00pm. Builder of the Day (building code/regulations questions): builderoftheday@aspen.gov, 970-429-2735, Monday-Friday 8:30am-4:30pm. Planner of the Day (zoning, floor area, net leasable, signage, mountain view plane, exterior design): planneroftheday@aspen.gov, 970-429-2764, walk-in hours Monday-Friday 9:00am-12:00pm. Historic Preservation: HP@aspen.gov, 970-429-2758. Construction hours: Monday-Friday 7:30am-5:30pm, Saturday 9:00am-5:00pm, no construction on Sundays.. Official information: https://aspen.gov/179/Building.

Aspen, Colorado has adopted: 2021 International Building Code (IBC) — adopted by Ordinance #1, 2023 (January 24, 2023), effective for permits submitted March 31, 2023 and later; the IRC has NOT been adopted by the City of Aspen and is not applied — single-family, duplex, and townhouse projects are reviewed under the 2021 IBC as locally amended, per the City's own 'Building Permit Application Checklist for Singlefamily, Duplex, and Townhouse Projects (2021 IBC)'; 2021 International Existing Building Code (IEBC); 2021 International Mechanical Code (IMC); 2021 International Fuel Gas Code (IFGC); 2021 International Plumbing Code (IPC); 2021 International Fire Code (IFC); 2021 International Swimming Pool and Spa Code (ISPSC); 2021 Aspen Energy Code (local amendment/supplement to the IECC); 2023 National Electrical Code (NEC), effective August 1, 2023; 2024 Colorado Wildfire Resiliency Code with local amendments — adopted by Ordinance 6, 2026 (March 25, 2026), effective April 23, 2026; referenced directly in the current Fence Permit Application Checklist (fences within 8 feet of a structure must be noncombustible/ignition-resistant; hedges within 5 feet must use ignition-resistant vegetation); Prior code cycle: 2015-edition IBC/IEBC/IMC/IFGC/IPC/IFC applied to permits submitted between February 2017 and March 2023, with local amendments in Ordinance 40, 2016 (superseded, listed for reference only); Local amendments to all adopted codes are codified in Title 8 (Building and Building Regulations) of the Aspen Municipal Code; Municode's Aspen library is a JavaScript-rendered application that could not be scraped directly in this or the prior session (confirmed again 2026-07-23: raw curl returns only the Angular SPA shell, and the shared browser environment used for the re-chase attempt this session was too unstable to reliably render deep-linked Title pages). However, the City's own 'Currently Adopted Building & Energy Codes' page (aspen.gov/197) directly publishes a 'Climate & Geographical Design Criteria' table (2026-07-23, live-confirmed): Ground snow load 100 psf; Wind Speed/Exposure Category 89 mph / B; Seismic Design Category C; Weathering Severe; Frost line depth 36 inches; Termite None to slight; Decay None to slight; Winter design temp -15°F; Summer design temp 82°F; Ice shield underlayment required Yes; Air Freezing Index 2000; Mean annual temperature 40°F. This resolves the design-criteria gap without needing Title 8/Municode.. Local amendments apply — see the Aspen overview page for the full list.

Yes, under specific conditions: the homeowner must personally perform the work, the property must not be for sale, rent, or generally open to the public, all work must be inspected before and after concealment, and it must comply with the National Electrical Code. A permit is still required before starting.