Building permits in Larimer County — a Northern Colorado county encompassing Fort Collins, Loveland, and Estes Park — are issued by Building Services, Building Division. Larimer County enforces the 2021 IBC/IRC with Larimer County amendments.
This guide covers what requires a permit, the Larimer County Online Portal, fees, trade permits, and inspections — so your Larimer County project stays on track.
Northern Colorado growth hub — from Fort Collins to Estes Park and Rocky Mountain National Park. Larimer County handles permitting for unincorporated areas only. Fort Collins, Loveland, and Estes Park manage their own permits. Mountain properties face additional snow load, wildfire mitigation, and environmental review requirements. All contractors must meet local licensing requirements.
Jurisdiction note. Larimer County permits cover unincorporated areas only. If your project is within an incorporated city or town, contact that municipality's building department.
What requires a building permit in Larimer County?
Under the 2021 IBC/IRC with Larimer County amendments, a permit is required for most construction activities:
Permit required
- New residential and commercial construction, additions
- Structural and load-bearing alterations
- Reroofing, windows, siding, and exterior changes
- Electrical service changes and most wiring work
- HVAC installations and changeouts
- Plumbing alterations, repipes, and water heaters
- Decks, pools, fences, patio covers, carports
- Change of occupancy or use
Typically exempt
- Painting, wallpapering, tiling, carpeting, cabinet installation
- Countertop replacement and similar finish work
- Retaining walls ≤ 4 ft (not supporting surcharge)
- One-story detached sheds ≤ 200 sq ft (on grade, no utilities)
Exemptions are narrow and scope-specific. When unsure, confirm with the building department before starting — see the penalty note below.
Get the permit issued before starting work. Building without one exposes the owner to penalties, fines, and stop-work orders. In Denver, fines range from $150–$999 per violation. Unpermitted work can also create issues when selling the property.
Who handles permitting in Larimer County?
The Building Division within Building Services handles plan review, permit issuance, and construction inspections. All permits are managed through the Larimer County Online Portal.
| Detail | Information |
|---|---|
| Office | Building Services — 200 W Oak St, Suite 3000, Fort Collins, CO 80521 |
| Phone | (970) 498-7700 |
| Online portal | Larimer County Online Portal |
| Code cycle | 2021 IBC/IRC with Larimer County amendments |
| Review timeline | 10–20 business days depending on project scope |
| Contractor license | Local licensing + state trade licenses |
Apply at the Larimer County Portal. Register an account on the Larimer County Online Portal. Start a new application, upload required documents (site plan, construction drawings, energy code compliance), and pay the plan review fee at submittal. Print and post the permit card on-site before work begins.
Larimer County building permit cost
Larimer County permit fees are valuation-based per county fee schedule.
| Fee component | How it works |
|---|---|
| Residential building permit | Valuation-based formula |
| Commercial building permit | Valuation-based formula |
| Plan review fee | 65% of building permit fee |
| Trade permits (E / P / M) | Separate fees per trade |
| Technology / admin fee | Added to permit total |
| Work-without-permit | Double fees + stop-work orders + fines |
Want a precise number for a specific Larimer County project? Send us the scope and valuation and we'll return a fee estimate alongside a filing timeline.
Larimer County trade permits
Electrical, plumbing, and mechanical work each needs its own permit and appropriately licensed tradespeople.
Electrical permits
Required for service installations, panel upgrades, solar PV, EV chargers, and most wiring alterations — performed by a contractor licensed through the Colorado State Electrical Board.
Plumbing permits
Required for new plumbing, repipes, water heater changeouts, fixtures, backflow, and sewer connections — performed by a contractor licensed through the Colorado Examining Board of Plumbers.
Mechanical (HVAC) permits
Required for HVAC installations, changeouts, ductwork changes, and venting modifications — performed by a qualified mechanical contractor per local requirements.
Miscellaneous & specialty
Fencing, pools, decks, sheds, and patio covers may require special permits depending on size and utility hookups. Demolition, sign, and right-of-way permits follow separate tracks.
Verify contractor licensing. Colorado does not issue a statewide general contractor license — general contractor licensing is handled at the local city or county level. However, trade licenses are state-regulated: electricians are licensed by the Colorado State Electrical Board and plumbers by the Colorado Examining Board of Plumbers. Always verify your contractor meets both state trade requirements and local licensing. The Colorado Wildfire Resiliency Code (2025) sets fire-resistant construction standards in wildland-urban interface zones. Verify licensing at dpo.colorado.gov/EandP.
How to get a building permit in Larimer County
Confirm permit requirement & zoning
Contact Building Services at (970) 498-7700. Confirm zoning compliance and whether your project requires a permit.
Register on Larimer County Portal & apply
Create an account on the Larimer County Online Portal. Start a new application and select the correct permit type.
Upload documents & pay plan review fee
Upload site plan, construction drawings, energy compliance forms, contractor license, and proof of insurance. Pay plan review fee at submittal.
Plan review & corrections
Staff reviews against 2021 IBC/IRC with Larimer County amendments. 10–20 business days depending on project scope. Resubmit revised plans if needed.
Pay remaining fees & receive permit
Pay the remaining permit fee upon approval. Print permit and post on-site before construction begins.
Schedule inspections through CO
Schedule inspections via the Larimer County Online Portal. Typical checkpoints: foundation, framing, rough-in MEP, insulation, final. Certificate of Occupancy required before occupancy.
Inspections in Larimer County
Schedule inspections through the Larimer County Online Portal. Standard checkpoints include foundation, framing, rough-in MEP, insulation, and final. Post the permit card on-site and maintain approved plans. A final inspection and Certificate of Occupancy are required before legal occupancy.
Address correction notices before requesting a re-inspection; a final inspection and Certificate of Occupancy are required before legal occupancy or use.
Official Larimer County permitting resources
- 🏛️ Larimer County — Building Services
- 💻 Larimer County Online Portal
- 📋 Larimer County Fee Schedule
- 🪪 CO State Electrical Board
Simplify Larimer County permitting with Alliance Permitting
Larimer County's Larimer County Online Portal, valuation-based fees, and Colorado's local licensing requirements reward applicants who prepare complete packages from the start. Alliance Permitting is a permit expediter for Larimer County — our permit expediting services pair AI-driven document review with experts who know the Building Services process, so your Larimer County submissions move faster.
Trusted by leading builders and brands — including Dream Finders Homes, Tesla, Verizon, Hyatt, and Sunnova.
Contractors and builders choose Alliance for Larimer County because we deliver:
- Local expertise — we know Building Services, the Larimer County Online Portal, and the 2021 IBC/IRC with Larimer County amendments.
- Complete oversight — track every permit and inspection across all your jobs in one place.
- Error-free submissions — AI pre-checks plus expert review catch issues before they become correction cycles.
Alliance Permitting is a permit documentation and submission company: we prepare your paperwork, file it correctly, and coordinate with the building department through issuance — including preparing private-provider documentation where that option is available. We are not a contractor and do not perform licensed plan review or inspections; that work stays with your team and the jurisdiction.
Need a Larimer County building permit?
Get your Larimer County project permitted right. Alliance Permitting handles your applications through the Larimer County Online Portal — so you build, not wait.
More Colorado permitting guides
This guide is provided by Alliance Permitting for general informational purposes and reflects publicly available information believed accurate as of June 2026. Permit requirements, fees, and processes change; always confirm current details with the Building Services before filing. This is not legal advice.