Solar Thermal Permit in Lafayette, Colorado

Lafayette requires a solar thermal permit for: Completed Building Permit Application; Contractor must hold a current City of Lafayette license; Two (2) sets of plans required, including: a site plan showing equipment location and setbacks for ground-mounted systems; structural plans with an engineer's evaluation of the existing structure showing compliance with 30 psf snow load and 105 mph 3-second-gust wind load (flush-mounted systems may submit generic engineering); a mechanical diagram showing system components; and an equipment schedule listing system components and their listings (heat exchanger, panels, storage tank, transfer fluid, pumps, backflow prevention, expansion tanks, etc.); Plans should be no larger than 11 x 17 inches. If your project isn't listed, confirm with City of Lafayette Planning & Building Department, Building Division at 303-661-1451 before starting work.

The City's last published figure was $63, plus City use tax and Boulder County use tax, per its Solar Thermal Permit Requirements page. Note that the City removed that page from its website sometime after February 2026 and no longer publishes any solar-thermal-specific fee or checklist — its current solar materials cover photovoltaic systems only. Confirm the current figure with the Building Division at 303-661-1451 before relying on it.

Plan review for a solar thermal permit in Lafayette typically runs 3–3 business days. This is an estimate, not a published figure — confirm current review times with City of Lafayette Planning & Building Department, Building Division at 303-661-1451.

You'll need: Building Permit Application; Site Plan and Structural/Mechanical Plans (2 sets). See the required-documents checklist on this page for details on each.

Lafayette requires 1 inspection(s) for a solar thermal permit, in order: Final Inspection. Schedule each through City of Lafayette Planning & Building Department, Building Division (303-661-1451).

Apply through City of Lafayette Planning & Building Department, Building Division at 1290 S. Public Road, Lafayette, CO 80026. Phone: 303-661-1451, email: buildingpermits@lafayetteco.gov. Office hours: City Hall public access hours Monday-Friday, 8am-5pm; Building staff available via phone/email during regular business hours. Main city line (303) 665-5588; Building Division direct line (303) 661-1451; Planning staff (303) 661-1270.. Official information: https://www.lafayetteco.gov/92/Planning-Building-Department.

Lafayette, Colorado has adopted: 2021 International Building Code (IBC) — adopted with an effective date of August 1, 2023, per the 2023 Lafayette Colorado Building Code. Source: City of Lafayette Building Code & Design Information page, https://www.lafayetteco.gov/361/Building-Code-Design-Information; 2021 International Residential Code (IRC) — adopted with the same August 1, 2023 effective date; includes a local amendment requiring Class 4 Impact Resistant Shingles (effective March 15, 2021) for reroofing. Source: same page as above; 2021 International Existing Building Code (IEBC); 2021 International Fire Code (IFC); 2021 International Energy Conservation Code (IECC) — includes local commercial low-slope roof reflectance/emittance requirements per IECC Section C402.3, Table C402.3; 2021 International Fuel Gas Code (IFGC); 2021 International Mechanical Code (IMC); 2021 International Plumbing Code (IPC); 2021 International Property Maintenance Code (IPMC); 2021 International Swimming Pool and Spa Code (ISPSC); 2023 National Electrical Code (NEC) — the City's live Solar Permit Application Process document states 'All work shall comply with the 2023 National Electric Code without amendments.' (re-grounded 2026-07-16 on a live primary source after the Solar Photovoltaic Plan Review and Inspections webpage that previously carried this quote was removed from the site). Source (PDF): https://www.lafayetteco.gov/DocumentCenter/View/17165/Lafayette-Solar--Permit-Process; 2023 Lafayette Colorado Building Code — the City's consolidated adoption document incorporating the 2021 I-Code package plus local strengthening amendments and the 2023 NEC; effective August 1, 2023. Source (PDF): https://www.lafayetteco.gov/DocumentCenter/View/36791/2023-Lafayette-Colorado-Building-Code-Final; Colorado Wildfire Resiliency Code — adopted statewide in 2025; applies within State-mapped low- or medium-risk wildfire areas in Lafayette (128 acres total: 44 acres of open space on the southeast edge of the city, 84 acres along the west side near Nyland Way and Brittney Lane). Requires non-combustible building materials for new construction in mapped areas and defines defensible-space/fuel-reduction guidelines within 30 feet of structures. Source: City of Lafayette Building Code & Design Information page, https://www.lafayetteco.gov/361/Building-Code-Design-Information. Local amendments apply — see the Lafayette overview page for the full list.