Lyons building permits
VerifiedDepartment contacts, adopted codes, permit types, fees, and gotchas for Lyons, Colorado.
Last verified 2026-07-06 · Source · Embed this page’s badge · Version history
Building department
- Address
- 432 5th Avenue, Lyons, CO 80540 (PO Box 49)
- Phone
- 303-823-6622 ext. 25 (Town Planning and Building Director); 970-545-3512 (SAFEbuilt Permit Technician); 970-545-3555 (SAFEbuilt Chief Building Official); 303-774-0454 (Inspection Request Line)
- Office hours
- Monday-Thursday 8:00 a.m.-4:30 p.m.; Friday 8:00 a.m.-noon; closed holidays. Town of Lyons main line 303-823-6622.
- Website
- Official site
- Permit portal
- Apply online at Lyons's portal
Inspection guide
See how inspections work in Lyons — sequence, scheduling & re-inspection fees.
Codes adopted
Colorado has no statewide-mandated building code edition. Under the Colorado Constitution's home-rule provisions (art. XX, home rule for municipalities since 1902; home rule for counties since 1970), building codes and zoning are an enumerated home-rule charter power, so cities and counties adopt and amend their own construction codes independently — predominantly the I-Codes, with editions and local amendments varying by jurisdiction. The one statewide floor is for energy: HB22-1362 (2022) created the Energy Code Board (jointly appointed by the Colorado Energy Office and the Department of Local Affairs) and requires that, on or after July 1, 2023 and before July 1, 2026, any municipality or county that adopts or updates a building code must adopt and enforce an energy code achieving performance equivalent to or better than the 2021 IECC together with the board's Model Electric Ready and Solar Ready Code (which includes electric-ready, EV-ready, and solar-ready provisions); from July 1, 2026 onward the floor shifts to the board's Model Low Energy and Carbon Code or an equivalent. Electrical and plumbing permitting defaults to the Colorado State Electrical Board and State Plumbing Board (within DORA's Division of Professions and Occupations) — the state issues permits and inspects statewide except in counties/jurisdictions that operate their own certified Electrical or Plumbing Inspection Program, in which case the local program has authority instead. Always confirm the currently adopted code edition, local amendments, and inspection authority (state board vs. local program) with the specific jurisdiction before submitting plans.
- 2021 International Building Code (IBC) — currently in effect per the Town of Lyons Building Department page and the Town's published Adopted Codes flyer
- 2021 International Residential Code (IRC)
- 2021 International Plumbing Code (IPC)
- 2021 International Mechanical Code (IMC)
- 2021 International Fuel Gas Code (IFGC)
- 2021 International Energy Conservation Code (IECC) — the Town's 2025 Residential Submittal Checklist explicitly requires '2021 IECC Energy Code compliance for the specific home being proposed' via REScheck or an Energy Compliance Report
- 2021 International Fire Code (IFC)
- 2021 International Property Maintenance Code (IPMC)
- 2021 International Existing Building Code (IEBC)
- 2023 National Electrical Code (NEC)
- Transition note: the Town of Lyons Building Department page (fetched 2026-07-06) states the 2021 ICC series and 2023 NEC apply 'until July 1, 2026,' with a 2024 ICC series adopted to take effect July 1, 2026. As of this file's lastVerified date (2026-07-06, five days after that effective date), the Town's own Adopted Codes flyer (townoflyons.com/DocumentCenter/View/932/Lyons-Design-Criteria) and Building Department page still list the 2021 series/2023 NEC as the current codes with no updated flyer found reflecting the 2024 series live — recommend confirming directly with SAFEbuilt/the Building Department (970-545-3555) whether the 2024 ICC series has been operationally rolled out before finalizing a code analysis for any permit filed on or after 2026-07-01.
- State of Colorado Wildfire Resiliency Code (Ordinance 1210) — effective July 1, 2026, adopted townwide for Class 1 and Class 2 requirements applicable to new commercial/residential construction and qualifying alterations to existing structures (roof replacement 25%+, exterior wall replacement 25%+, additions adding 500+ sq ft, and new/replacement fences or decks); per the Town of Lyons Wildfire Resiliency Code Requirements page.
Permit types & fees
Residential Building Permit (New Construction)
Required for new single-unit, duplex, and detached ADU construction in the Town of Lyons. Reviewed under the 2021 IRC/IBC as locally adopted (transitioning to the 2024 ICC series effective July 1, 2026 — confirm current operational status with SAFEbuilt), plus the Town's Climatic and Geographic Design Criteria. Permit processing, plan review, and inspections are handled by SAFEbuilt under contract to the Town.
Residential Addition / Interior Remodel Permit
Required for additions and interior remodels to existing single-unit, duplex, and ADU structures in Lyons. Reviewed under the 2021 IRC as locally adopted. An addition of 500+ sq ft triggers Wildfire Resiliency Code compliance for permits applied for on or after July 1, 2026.
Electrical Permit
Required for installation, alteration, or repair of electrical systems in Lyons. Governed by the 2023 NEC as adopted. Lyons does not run its own certified electrical licensing program: electricians must hold a current Colorado State Electrical Board (DORA) license, which the Town/SAFEbuilt verifies contemporaneously at registration and, at inspectors' discretion, at the job site, per the Colorado Chapter ICC procedure required under SB19-156.
Plumbing Permit
Required for installation, alteration, or repair of plumbing systems in Lyons, including water and sewer line replacement. Governed by the 2021 International Plumbing Code (IPC) as adopted. Lyons does not run its own certified plumbing licensing program: plumbers must hold a current Colorado State Plumbing Board (DORA) license, verified contemporaneously by the Town/SAFEbuilt per the HB19-1086 procedure.
Mechanical / HVAC Permit
Required for heating, cooling, and ventilation equipment installation or replacement in Lyons, including furnace/air conditioner replacement. Governed by the 2021 International Mechanical Code (IMC) and 2021 International Fuel Gas Code (IFGC) as adopted.
Roofing Permit (Re-Roof)
Required for re-roofing work in the Town of Lyons, billed at a flat $135 Single-Unit Residential One Stop fee. Class A roofing material and noncombustible gutters/downspouts are required under the Wildfire Resiliency Code for permits applied for on or after July 1, 2026, when the replacement covers 25% or more of the roof.
Rooftop Solar Photovoltaic (PV) Permit
Required for solar photovoltaic system installations in Lyons. Governed by the IRC and NEC Articles 690 & 705, per the Town's dedicated Solar Submittal Requirements (October 2025). Flat fees apply, distinct from the general valuation-based electrical fee schedule.
Accessory Dwelling Unit (ADU) Permit
Required for construction of an Accessory Dwelling Unit (basement/attic apartment, addition, detached structure, or certified Tiny Home on Wheels) in the Town of Lyons. ADUs are approved through the standard building permit process (no separate use permit) in all zone districts that allow single-unit dwellings, subject to the Town's ADU Standards and Rules.
Demolition Permit
Required for demolition of a structure in the Town of Lyons, billed at a flat $135 Single-Unit Residential One Stop fee for single-unit residential demolitions.
Commercial Tenant Improvement Permit
Required for interior build-out/alteration of commercial tenant space in the Town of Lyons. Reviewed under the 2021 IBC as locally adopted. Billed under the general valuation-based Building Permit Fee schedule (no distinct commercial-TI flat fee is published).
Deck / Covered Patio Permit
Required for construction of a new deck or covered patio in the Town of Lyons. Reviewed under the 2021 IRC as locally adopted, per the Town's Residential Deck Guide. A new or replacement deck triggers Wildfire Resiliency Code compliance for permits applied for on or after July 1, 2026.
EV Charger / EVSE Permit
The Town of Lyons has no dedicated EV-charger/EVSE application type or fee line item. Installing a Level 1/Level 2 EV charging circuit is electrical work billed under the same valuation-based Electrical Permit Fee schedule on the Town's Building Permit Fees PDF (updated 6.16.25) used for any other residential electrical alteration. With a population well under 10,000 (2020 Census), Lyons falls below the population threshold that makes Colorado HB24-1173's mandatory 3-business-day EV-permit decision timeline and model-code-adoption requirements directly applicable, and no Town ordinance or webpage was found adopting the EV Charging Model Land Use Code (EV MLUC) or an equivalent local standard.
New residential construction activity
New privately-owned residential construction onlyHousing units authorized by building permits for new privately-owned residential construction — this is not total permit volume (no commercial permits or remodels).
- Latest month (2026-05)
- No data reported
- Trailing 12 months
- No data reported
- Year to date (2026 YTD)
- No data reported
- Full year 2025
- 2units
2 buildings · $929,820 valuation
Source: U.S. Census Bureau, Building Permits Survey (BPS), 2026-05 vintage. Census survey data — separate from the permit-requirements verification above. All Colorado building activity
Tips & gotchas
- Lyons runs its own Planning and Building Department, with day-to-day permit processing, plan review, and inspections contracted to SAFEbuilt — Boulder County's own unincorporated Building Division does not issue permits within Town limits. Direct routine permit questions to SAFEbuilt (970-545-3512 / 970-545-3555) and policy/zoning questions to the Town's Planning and Building Director (303-823-6622 ext. 25).
- As of this file's verification date (2026-07-06), the Town's own published Adopted Codes flyer and Building Department page still describe the 2021 ICC series/2023 NEC as current, even though a 2024 ICC series and the State of Colorado Wildfire Resiliency Code were both slated to take effect July 1, 2026 (5 days prior). Confirm directly with SAFEbuilt whether the 2024 series and Wildfire Resiliency Code are operationally live before finalizing any code analysis for a current application.
- Electrical and plumbing permits in Lyons are NOT locally licensed trades — the Town/SAFEbuilt verifies your existing Colorado DORA Electrical/Plumbing Board license contemporaneously (per SB19-156/HB19-1086), rather than running its own certified trades exam or license program. Out-of-town contractors need only their active state license plus Town registration, not a separate local trade exam.
- Lyons' Town of Lyons Contractor License carries a $50 fee, but contractors holding a current Colorado state Electrical or Plumbing license are exempt from that local fee for their respective trade.
- Every building permit in Lyons carries TWO layered use taxes calculated the same way — (valuation x 45%) x 1.185% for Boulder County Open Space & Recycling, and (valuation x 45%) x 3% for Park Fund/General Fund — plus, for new residential construction, a $2.20/sq ft Park Tax on new living space (including basements) and a St. Vrain Valley Schools Fair Contribution Fee per unit. Budget for all of these on top of the base permit fee and 65% Plan Review Fee; they are easy to underestimate from the base fee schedule alone.
- Many common residential scopes (furnace/AC replacement, re-roof, water heater, sprinkler system, siding/window replacement, fence over 6 ft, demolition, water/sewer line replacement) are billed at a flat $135 'Single-Unit Residential One Stop' fee rather than the valuation-based schedule — a $70 re-inspection fee applies to any of these if a re-inspection is needed.
- ADUs in Lyons are unusually permissive versus many peer Colorado mountain-town jurisdictions: no owner-occupancy requirement, no deed restriction, no off-street parking requirement, and NO water tap/sewer tap/electric community investment fees — but short-term rentals (under 30 days) are explicitly prohibited in an ADU.
- All new and replacement fences will require a building permit starting July 1, 2026 specifically to confirm Wildfire Resiliency Code compliance — fences within 8 ft of an occupied structure must be noncombustible, ignition-resistant, or vinyl (wood is allowed only beyond 8 ft), and are capped at 4 ft in a front-yard setback / 6 ft elsewhere. Not modeled as a standalone permitType in this file but flagged here as a materially new permit-triggering event.
- If any part of a project (including roof overhangs, gutters, footings, decks, or balconies) encroaches into the FEMA regulatory floodplain, a separate Floodplain Development Permit (Lyons Municipal Code Chapter 18, Article 15) is required in addition to the building permit — contact Floodplain Administration directly (303-823-6622 ext. 47, jdoles@townoflyons.com) before starting design.
- The Town's Municode-hosted Municipal Code (library.municode.com/co/lyons, including Chapter 18 Building Regulations and Chapter 6 Article 3 Contractor Regulations) returned HTTP 403 to every automated fetch attempt across multiple user-agent/referer combinations, and is rendered as a JavaScript single-page app not amenable to a static-HTML retrieval workaround. All code-adoption, fee, tax, ADU, solar, wildfire, and licensing facts in this file are instead sourced directly from the Town's own PDFs and Building Department pages, which independently corroborate the licensing/fee details Municode would otherwise contain. If deeper section-by-section amendment text from Chapter 18 or Chapter 6 Article 3 is needed, a manual/authenticated Municode session may be required.