Apply, Inspect and Close a Larimer County Building Permit Without Missing a Mountain-Site Review
Start by confirming jurisdiction and the application route. Larimer County handles construction in unincorporated areas—not projects inside Fort Collins, Loveland, Estes Park or another incorporated municipality.
Use this guide to choose the correct permit, prepare hard-copy residential or commercial plans, use the online portal for eligible permits, calculate the county use-tax deposit, schedule inspections, check wildfire and floodplain requirements or close an old permit.
Choose the Exact Larimer County Task
Larimer County Building Division Address, Phone and Hours
Confirm Unincorporated Larimer County Before Paying
Fast online check
- Open the Larimer County Assessor property search.
- Search the property address.
- Review the tax district and municipality information.
- Confirm the site is outside incorporated city or town limits.
- Call Building when the result is unclear.
Portal address-search tip
The county’s portal instructions recommend entering only the street number and first letter of the street name when the full address does not match the database.
When an address still does not appear, do not submit payment until jurisdiction is verified.
Which Larimer County Permit Route Fits the Project?
Project |
Application route |
Important dependency |
|---|---|---|
New home, cabin, duplex or residential addition |
Hard-copy residential application |
Parcel, plot plans, engineered plans, zoning, water/sewer, wildfire, floodplain and septic |
Residential alteration, basement finish or conversion |
Hard-copy residential application |
Existing/proposed plans, code compliance and trade scopes |
New commercial building, addition or occupancy change |
Hard-copy commercial application |
Commercial site-plan determination, fire, Planning, Engineering, Health and accessibility |
Detached utility building, utility addition, pool or freestanding utility structure |
Online utility permit |
Site plan, setbacks, structural design and wildfire area |
Reroofing or roof repair over 100 square feet |
Online miscellaneous permit |
Roof class, wildfire area and structural repair |
Furnace, boiler, air conditioner, fireplace or water heater |
Online miscellaneous permit |
Mechanical, electrical, gas and equipment details |
Electrical, minor plumbing, gas line or gas appliance |
Online miscellaneous permit |
Valid contractor license or qualifying homeowner work |
Roof-, wall- or ground-mounted solar, solar water heating or wind generator |
Online solar permit |
Separate electrical panel or gas-generator permit when included |
Sign |
Sign application |
Land Use Code, Planning review, structure and electrical work |
Fire alarm or sprinkler system |
Fire district or State Fire Marshal |
Building permit may still apply to associated construction |
Structure, grading or paving in a mapped floodplain |
Floodplain Development Permit |
Engineering approval may be needed before building issuance |
Short-term rental or lodging facility |
Start with Planning |
Pre-application process, land-use approval and life-safety inspection |
Common Larimer County Thresholds
Permit usually required
- New home, cabin, garage or agricultural building
- Residential deck over 30 inches high
- Deck serving a required exit door
- Fence over 7 feet high
- Retaining wall 4 feet or higher
- Reroof or roof repair over 100 square feet
- Heating, AC, propane or gas-line work
- Structural repair or occupancy change
Building permit generally not required
- Fence 7 feet high or less
- Detached non-habitable shed up to 200 square feet with no utilities
- Roof repair up to 100 square feet
- Same-size or smaller replacement windows
- Concrete driveway or sidewalk flatwork
- Non-structural siding replacement
- Cosmetic finishes, cabinets and flooring
- Pergola or trellis with roof at least 67% open
Submit the Right Package the First Time
Confirm jurisdiction, parcel and project type
Every application needs a current parcel number. Verify that the property is in unincorporated Larimer County and identify whether the permit is residential, commercial, miscellaneous, utility or solar.
Check Planning and site constraints
Confirm use, setbacks, building envelopes, access, easements, floodplain, wildfire area, water, sewer or septic before completing structural design.
Prepare the correct application
Use hard copy for full residential and commercial permits. Use the portal for currently supported miscellaneous, utility and solar permits.
Prepare coordinated plans
Include the site plan, floor plans, elevations, structural details, engineering, energy documents and trade information required by the county handout for the project.
Submit the package and intake payment
Residential plot-plan instructions state that the plot-plan fee and initial plan-review fee are collected at submittal and are nonrefundable. Remaining fees are due at issuance.
Watch email and portal reviews
Check messages from addresses ending in @larimer.org, including spam folders. Open the permit’s Reviews tab when the status shows a revision is required.
Upload or deliver coordinated revisions
Cloud every change, include the resubmittal form and update all affected sheets. Portal-supported permit revisions may be uploaded directly to the record.
Pay and download the issued permit
Wait for the “Ready for Payment/Issuance” message. After payment, download the permit card, conditions and approved plans from the Attachments tab.
What Larimer County Requests for Residential Plot Plans
Plan quantity
The county’s residential plot-plan page calls for two complete plan sets and at least five plot plans for new construction, additions and most exterior alterations.
Plot-plan format
Draw the complete parcel to scale. Show property lines, dimensions, north arrow, roads, existing structures, proposed work and required setbacks.
What is rejected
Aerial or satellite images are not accepted as the plot plan. Plans marked with red pen or red marker are also rejected.
Online Application Micro-Steps
Register or log in
Open the Community Development Customer Self-Service portal and select the applicable permit under Apply.
Add the work location
Search carefully. When the full address fails, use the street number and first letter of the street name.
Add applicant, owner and contractor
The portal requires the applicant, homeowner and licensed company information that applies to the permit.
Complete fields and attachments
Upload every document identified for the selected permit type before electronically signing and submitting.
Watch the first three business days
The online instructions say staff will email within three business days when questions, corrections or additional documents are needed before initiation.
Track initiation through issuance
The county’s online guide estimates issuance at approximately 2–6 weeks after initiation depending on permit type.
Documents That Commonly Prevent Intake Delays
Property
- Current parcel number
- Correct site address
- Owner name and email
- Legal access
- Setbacks and envelopes
- Water and wastewater source
Project
- Detailed work description
- Total project valuation
- Scaled site or plot plan
- Floor plans and elevations
- Structural engineering
- Energy and radon documents
People and approvals
- General contractor license
- State electrical/plumbing licenses
- Homeowner certification
- Fire-district approval
- Floodplain permit
- OWTS or sewer approval
Calculate the Larimer County Building Use-Tax Deposit
The county assumes that 50% of the project valuation is construction materials, then applies the 1.05% county use-tax rate. This equals 0.525% of the permit valuation.
Do Not Use an Old Larimer County Fee Table
Permit fees
Depend on project type, valuation, square footage, electrical load, plumbing, mechanical work and current fee tables.
Additional charges
May include plan review, Planning plot-plan review, transportation, parks, schools, fire district, use tax, septic, floodplain and other agency fees.
Card convenience fees
2.99% for in-office credit cards and 3.29% for online card payments.
Save Material Invoices for the Project Cost Report
Finance and Sales Tax: 970-498-5930
Schedule Before 11:59 PM for the Next Working Day
Portal
Schedule, cancel and view inspection comments through the permit record.
Cutoff
11:59 PM
A request at 12:00 AM or later is scheduled no earlier than the working day after next.
Before requesting
- Permit and IVR numbers ready
- Permit card posted
- Address visible from road
- Approved plans on site
- Work complete for inspection stage
- Safe access provided
Avoid reinspection charges
- Do not cover required work
- Complete every correction
- Unlock gates and structures
- Provide required ladders or access
- Stake proposed corners and property lines
- Read permit conditions
Do Not Skip an Earlier Inspection Stage
Larimer County Code Dates That Matter in 2026
January 1, 2026
The 2024 IRC, IBC, IECC, IEBC, IFGC, IMC, IPC, IPMC and International Swimming Pool and Spa Code became effective.
January 1, 2026
The 2025 Wildfire Resiliency Code with Larimer County amendments became effective.
August 1, 2026
Larimer County begins enforcing the 2026 National Electrical Code. The 2023 NEC remains the listed electrical code through July 31, 2026.
Mountain and Foothill Projects Need a Separate Wildfire Check
Before design
Determine whether the parcel is in a wildfire hazard area and which exterior-material, roof, vent, deck, defensible-space or access rules apply.
During construction
Coordinate required wildfire features with the approved building plans and the local fire authority having jurisdiction.
Before occupancy
A final wildfire inspection must be approved before the county releases a Certificate of Occupancy for an applicable property.
Resolve Floodplain, Septic, Access and Foundation Issues Early
Floodplain
- A Floodplain Development Permit is typically required for construction or development in designated floodplain areas.
- Development includes additions, remodeling, grading, paving, drainage changes, storage, bank work, bridges and culverts.
- New buildings and major alterations are heavily restricted in the floodway.
- Check the interactive county map before finalizing the site plan.
Onsite wastewater system
- Complete soil testing before an OWTS permit application.
- Provide the soil report, system design, plot plan and engineering when required.
- Leave test pits open and safely protected for county inspection.
- Obtain approval before relying on a bedroom count or building location.
Access and right-of-way
A county access, right-of-way, private-road, development-construction or bridge/culvert permit may be required separately from the building permit.
Wind and snow load
Use the county design map and project-specific data. Mountain and high-wind areas frequently require engineered structural plans.
Expansive soils
Many Front Range parcels require an engineered footing and foundation plan or a site-specific report confirming non-expansive soil.
Who May Pull and Perform the Work?
Licensed contractor
- Larimer County licenses general, roofing, mechanical, gas and specialized trade contractors.
- Class A, B and C applicants generally provide an applicable exam or accepted jurisdictional license proof.
- Applicants also document experience, lawful presence, workers’ compensation and liability insurance.
- Electrical and plumbing contractors must maintain the applicable Colorado state license.
Homeowner acting as contractor
- Submit the county Homeowner Certification and Responsibilities form.
- Accept responsibility for code compliance, job safety, inspections and correction notices.
- A homeowner may perform qualifying work on the owner’s own home.
- Anyone hired for regulated electrical or plumbing work must hold the required state license.
County license |
Published application fee |
Typical insurance minimum |
|---|---|---|
General Class A |
$150 |
$1,000,000 general liability |
General Class B |
$125 |
$1,000,000 general liability |
General Class C |
$100 |
$1,000,000 general liability |
Roofing |
$75 |
$300,000 general liability |
Mechanical or gas piping |
$75 |
$300,000 general liability |
Specialized trade |
$75 |
$300,000 general liability |
Protect the Application and Permit From Expiring
Application
An unissued residential application expires after 180 days. A single written extension of up to 90 days may be granted for cause.
Issued permit
A permit expires 18 months after issuance. One written 18-month extension may be granted without a fee.
Construction activity
The permit may become void when work or the first inspection does not begin within 180 days, or when work is suspended for 180 days or more.
What Happens When Work Started Without a Permit?
Stop affected construction
The county may issue a Stop Work Order when permit-required work begins without approval.
Contact Code Compliance
Ask whether the work qualifies for the county’s as-built process and which Planning review is needed.
Verify location and setbacks
An existing structure that violates a setback may require a variance, relocation or removal.
Document concealed work
The owner may need to uncover construction or hire a licensed engineer to evaluate work the inspector cannot see.
Pay added fees and obtain final approval
The county FAQ warns that fees may be double the normal permit amount. As-built permits must receive final approval within their shorter closeout period.
Search Before Buying, Selling or Remodeling
Open the Community Development portal
Search by property address, parcel, permit number, contractor or case information.
Review all related records
Check building, electrical, plumbing, mechanical, Planning and Code Compliance entries.
Look for final status
An issued permit does not prove a final inspection, Certificate of Occupancy or Letter of Completion was obtained.
Submit a research request when needed
The county warns that the portal may not contain all historical records or work completed without approval.
What the Larimer County Permit Status Means
Finish Every Agency Approval Before Using the Structure
Certificate of Occupancy
Issued for residential and commercial permits after the required final inspection and agency approvals.
Letter of Completion
Used for cabins, barns, garages, accessory structures, storage buildings and miscellaneous permits.
Automatic portal attachment
The county says the CO or Letter of Completion normally attaches to the permit within 48 hours after final inspection approval.
Temporary Certificate of Occupancy Rules
Validity
A county-approved Temporary Certificate of Occupancy is valid for 180 days.
Fee
The published TCO fee is $600.
Life safety first
The inspector must determine that the structure can be safely occupied and that required life-safety items are complete.
Fix Common Larimer County Permit Problems
Problem |
Best next action |
|---|---|
Address will not appear in the portal |
Search with the street number and first letter, then confirm the tax district and county jurisdiction. |
Residential or commercial application option is missing online |
Use the official hard-copy application and current project handout. |
Permit remains BLD Applied |
Open Reviews, check email and allow the published permit-technician processing period after the due date. |
Plans rejected at intake |
Check scale, plot-plan quantity, engineering, secure PDF settings, red markings and required contacts. |
Fee differs from the old schedule |
Use the July 1, 2026 rates and official portal invoice; do not rely on the 2025 fee PDF. |
Inspection is not available next day |
Check the request time and inspection area. Requests at midnight or later move to the following working-day window. |
Wildfire inspection cannot be selected |
Use the separate Wildfire Service Request form. |
Final inspection passed but no certificate appears |
Confirm every outside-agency final and allow up to 48 hours for the portal attachment. |
Old work has no permit |
Contact Code Compliance before opening walls or submitting a standard new-work application. |
Shed is under 200 square feet |
Even without a building permit, verify setbacks, utilities, floodplain, wildfire and land-use restrictions. |
What to Say When You Contact the County
Permit requirement
“I am planning [exact work] at [address], parcel [number]. Can you confirm Larimer County jurisdiction, the correct application route, required plot plans, wildfire area, floodplain, OWTS and contractor requirements?”
Open permit
“The portal shows permit [number] as [status]. Which review, document, payment, inspection or outside-agency approval is preventing issuance or final closure?”
Do Not Consider the Project Finished Until These Are Complete
- Unincorporated county jurisdiction confirmed
- Parcel and property information verified
- Planning and setback review complete
- Floodplain, access and OWTS approvals complete
- Wildfire requirements identified
- Correct paper or online application used
- Contractors properly licensed
- Permit formally issued
- Permit card and approved plans posted
- Every required inspection approved
- Project Cost Report deadline tracked
- CO or Letter of Completion downloaded
Larimer County Building Division Map
Open the Correct Larimer County Resource
Larimer County Building Department Questions
Where is the Larimer County Building Division?
The main office is at 200 W. Oak Street, Suite 3100, Fort Collins, Colorado 80521. Office hours are Monday through Friday from 8:00 AM to 4:00 PM. The main phone number is 970-498-7700.
Can I apply for every Larimer County permit online?
No. The county currently allows online applications for miscellaneous, utility and solar permits. Full residential and commercial building permits require hard-copy application packages.
What is the inspection scheduling cutoff?
Requests confirmed before 11:59 PM may be scheduled for the next working day. Requests received at 12:00 AM or later will be conducted no earlier than the working day after next.
What codes does Larimer County use in 2026?
Permits initiated on or after January 1, 2026 use the 2024 International Codes and the 2025 Wildfire Resiliency Code with county amendments. The 2023 NEC applies through July 31, 2026, and the 2026 NEC takes effect August 1, 2026.
How much is the Larimer County building use-tax deposit?
The deposit assumes construction materials equal 50% of the permit valuation and applies the county’s 1.05% use-tax rate. The result is 0.525% of the total project valuation.
How long does residential plan review take?
The county’s residential plot-plan page gives an approximate review period of 10–20 working days depending on the application type and warns that review may take longer during busy periods.
Does a 200-square-foot shed require a building permit?
A detached, non-habitable accessory structure no larger than 200 square feet and containing no utilities generally does not require a building permit. Setbacks, wildfire, floodplain and other land-use requirements still apply.
How long is a Larimer County building permit valid?
An issued permit generally expires 18 months after issuance. The Building Official may grant one written 18-month extension without a fee. Work or the first inspection must begin within 180 days, and the project cannot remain suspended for 180 days or more.
Can a homeowner pull a permit?
A homeowner may act as the contractor for qualifying work on the owner’s home after completing the county homeowner certification. Anyone hired for regulated electrical or plumbing work must hold the applicable Colorado license.
How do I find an old or open building permit?
Search the Community Development portal by address, parcel, permit number, contractor or case. When the portal lacks historical information, submit a property-research request through Larimer County Code Compliance.
Official Information Used
Building-Department.org is an independent guide and is not Larimer County.
This page was rebuilt using the official Larimer County Building Division, Community Development portal, permit applications, electronic-submittal instructions, inspection guide, 2026 code notices, July 2026 fee memo, contractor licensing, use-tax guidance, residential application, floodplain, septic, Planning, Code Compliance and Certificate of Occupancy resources.
Last reviewed: July 22, 2026.
Permit availability, electrical-code dates, fees, inspection routes and agency requirements can change. Confirm time-sensitive details with the Building Division before submitting plans, paying fees or beginning work.
Khushboo Bobade is a public records researcher and editorial writer specializing in government service documentation and construction permit systems.
Her research focuses on explaining building permits, inspection procedures, zoning regulations, and public permit records maintained by local government building departments across the United States.
Professional profile: View LinkedIn Profile
Check Permit Type, Estimate Fees, Prepare Inspections and Find Official Building Department Links
Use this free tool before applying for a building permit, booking an inspection, checking zoning rules, or searching permit records. It helps homeowners, contractors, landlords, buyers, and business owners understand the next step before visiting the official building department portal.
What building department task do you need help with?
Choose your goal. The tool will suggest the right next step, what to prepare, and which official page to check.
Before starting work, check whether your project needs building, zoning, electrical, plumbing, mechanical, right-of-way, or HOA approval.
Many portals require contractor registration, license details, insurance, plans, owner authorization, and inspection scheduling access.
Building Permit Type Finder
Select the project type to understand which permits or reviews are commonly required. Always confirm with the official local building department.
Permit Fee Estimate Calculator
Estimate a rough permit fee using project value and common percentage-based review assumptions. Local minimum fees, technology fees, impact fees, reinspection fees, and trade fees can change the final amount.
Inspection Readiness Checklist
Use this before scheduling framing, electrical, plumbing, mechanical, roofing, final, or certificate-related inspections.
Zoning and Setback Pre-check
Use this before applying for a permit when your project may affect land use, setbacks, lot coverage, height, parking, signs, fences, accessory structures, or business use.
Plan Review Timeline Estimator
Estimate how complex your review may be. Local staffing, incomplete plans, corrections, holidays, fire review, zoning review, and outside agency review can change timing.
Permit Records Search Helper
Use this if you are trying to find old permits, inspection history, certificate of occupancy details, open permits, or code-related records.
Official Building Department Resource Finder
Enter city/county and state to create safe searches for official permit portals, inspection scheduling, building codes, zoning maps, forms, fees, and contact pages.
Building Department vs Planning/Zoning
- Building Department: permits, plan review, inspections, code compliance, certificates.
- Planning/Zoning: land use, setbacks, height, lot coverage, signs, parking, variances.
Best sitewide placement
Place this tool after the first main guide section or before FAQs. It turns a normal article into a practical permit-preparation page.
Important note
This tool gives educational guidance only. Final permit requirements, fees, inspections, forms, and deadlines must be confirmed with the official local building department.