Fort Collins building permit requirements
City of Fort Collins — Building Services
Verified 2026-06-30 · Source
Department information
- Address
- 281 N. College Ave., Fort Collins, CO 80524
- Phone
- 970-416-2740
- Office hours
- Monday–Friday, 8 a.m. to 5 p.m.
- Website
- Official site
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.
Permit types
Residential Building Permit (New Construction)
Required for new single-family homes, townhomes, and duplex/ADU new construction in Fort Collins. Reviewed against the 2024 IRC with 2024 Fort Collins Amendments and the 2024 IECC with Fort Collins energy/green amendments. Fee is calculated from the Fee Schedules occupancy-based rate table (R-3 = $0.65/sq ft), split 35% Plan Check / 65% Building Permit.
Residential Addition / Remodel Permit
Required for residential additions (garage expansions, pop-the-tops, sunrooms, enclosing a covered patio) and remodels (kitchen/bath alterations, basement finishes, layout changes) in Fort Collins. Additions use the same occupancy-based Fee Schedules rate table as new construction; interior remodels use a valuation-based tiered fee table.
Electrical Permit
Required for outlets, panels, wiring, repairs, lighting, EV chargers, and other electrical work in Fort Collins. The CITY of Fort Collins Building Services issues and reviews electrical permits (not a Colorado state board directly) — but individuals performing electrical work must hold a State of Colorado electrical license, and Master Electricians must additionally register with the City of Fort Collins Contractor Licensing office to work under permits in city limits. Governed by the 2023 NEC (effective Aug. 1, 2023), matching the state-adopted electrical code.
Plumbing Permit
Required for water, sewer, gas piping and valve work in Fort Collins. The CITY of Fort Collins Building Services issues and reviews plumbing permits directly — individuals performing plumbing work must hold a State of Colorado plumbing license, and Master Plumbers must additionally register with the City of Fort Collins. Governed by the 2024 International Plumbing Code (IPC) with Fort Collins Amendments (Fort Collins uses the IPC, unlike Reno's UPC).
Mechanical / HVAC Permit
Required for heating, cooling, ductwork, exhaust, mini-splits, heat pumps, air handlers, rooftop unit replacement, A/C, furnaces, and water heaters in Fort Collins. Governed by the 2024 International Mechanical Code (IMC) and 2024 International Fuel and Gas Code (IFGC) with Fort Collins Amendments.
Roofing Permit (Reroof)
Required for roof replacement/repair beyond a minor threshold on residential and commercial buildings in Fort Collins. Flat-fee Fast-Track permit; residential and commercial rates differ. Fort Collins requires Class 4 impact-resistant asphalt shingles when replacing 50% or more of a roof and mandates ice barrier at all eaves.
Solar PV Permit
Required for rooftop or ground-mounted solar PV installation, reinstallation, and energy storage systems (ESS) in Fort Collins. Because Fort Collins Utilities is the city's own municipal electric utility, solar/battery projects require a SEPARATE Utilities Interconnect and Rebate Application in addition to the Building Services permit. A separate Poudre Fire Authority permit is also required for new installations and larger ESS.
Accessory Dwelling Unit (ADU) Permit
Required for construction of a new attached or detached ADU in Fort Collins. Since February 2025, Colorado state law HB 24-1152 allows ADUs in all Fort Collins zone districts (previously limited to Old Town and select neighborhoods), and prohibits owner-occupancy requirements — ADUs may be rented out separately from the primary home. Fort Collins is home to Colorado State University, making ADUs relevant for rental/student housing demand. All ADUs require a mandatory Basic Development Review before a building permit.
Demolition Permit
Required for demolishing an existing structure in Fort Collins, whether interior/non-structural, interior structural, partial building, or complete building demolition. Requirements scale with demolition scope (asbestos disclosure/assessment, state approval notice, construction waste management).
Commercial Tenant Improvement / Remodel Permit
Required for commercial alterations, change of function/use/occupancy, tenant finish, and vanilla shell/white box/landlord work in Fort Collins. Uses the same tiered valuation-based fee table as residential remodels.
Deck / Covered Patio Permit
Required for decks, stairs, ramps, landings, and patio/porch covers in Fort Collins (except small decks under 200 sq ft / 30 in. high, which are permit-exempt). Flat-fee Fast-Track/Exterior permit; pre-built structures and commercial projects require a Colorado-licensed structural engineer's stamp.
Tips & gotchas
- New building codes (2024 IRC/IBC/IECC + Fort Collins Amendments) took effect April 1, 2026 — confirm your submittal date against this cutoff; the 2021-cycle codes remain valid for reference only until Oct. 1, 2026.
- Fort Collins Utilities is the city's OWN municipal electric utility (distinct from Xcel Energy, which serves other parts of Larimer County) — solar, battery storage, and new ADU electric service all route through Fort Collins Utilities-specific review/interconnect steps (Solar-Rebates@fortcollins.gov, ElectricProjectEngineering@fortcollins.gov) in addition to the standard Building Services permit.
- Electrical and plumbing permits are issued directly by City of Fort Collins Building Services (not a Colorado state board) — but tradespeople must hold the underlying State of Colorado license, and Master Electricians/Plumbers must separately register with the City (no extra city exam) per the Contractor Licensing page.
- As a CSU college town, Fort Collins has an active ADU/rental market; since Feb. 2025 (Colorado HB 24-1152) ADUs are allowed in all zone districts and cannot require owner-occupancy, though short-term rental of ADUs remains prohibited outside PUDs.
- Fort Collins' structural design criteria (30 in. frost depth, Seismic Design Category B, 35-50 psf ground snow loads, Front Range Gust Map wind speeds) reflect its high-wind foothills location — notably different from other Colorado Front Range cities; verify site-specific values via the ASCE 7-22 Hazard Tool referenced on the Building Code page.
- Most Fast-Track trade permits (electric, plumbing, mechanical, water heater, fireplace) are flat $65 fees — among the simplest and cheapest in the multi-state PermitBase dataset — but multi-trade or occupancy-changing scopes route to the higher valuation-based Remodel/Alteration fee table instead.
Sources & verification
Verified against official sources. Last reviewed 2026-06-30.
- City of Fort Collins — Building Services — official building department
- City of Fort Collins — Building Permits (canonical permit-application catalog and Fast-Track fees)
- City of Fort Collins — Building Services (department landing page, contact info, hours)
- City of Fort Collins — Building Code (adopted 2024 I-Codes, local amendments, design criteria)
- City of Fort Collins — Fee Schedules (occupancy-rate table, Development Review fees)
- City of Fort Collins — Building Inspections (full inspection-type catalog)
- City of Fort Collins — Contractor Licensing (license classes, Master Electrician/Plumber registration, fees)
- City of Fort Collins — Accessory Dwelling Units (ADUs)
- City of Fort Collins — 2024 IECC Amendments (PDF) — all-electric building, solar-ready zone, heat pump provisions
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 Fort Collins building department before you submit. PermitBase is an independent reference and is not affiliated with any government agency.
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