Building permits in Weld County — a large Northern Colorado county encompassing Greeley and one of the state's fastest-growing regions — are issued by Planning & Development Services, Building Division. Weld County enforces the 2024 International Codes with Weld County amendments, in effect since 15 June 2026.
This guide covers what requires a permit, the Weld County Online Portal, fees, trade permits, and inspections — so your Weld County project stays on track.
Northern Colorado energy and agriculture hub with explosive residential growth. Weld County handles permitting for unincorporated areas only. Greeley, Windsor, and other cities manage their own permits. Weld County has enforced the 2024 International Codes since 15 June 2026. Rapid residential development in the I-25 corridor makes timely permitting essential.
Jurisdiction note. Weld 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 Weld County?
Under the 2024 IBC/IRC with Weld County amendments (Chapter 29 of the Weld County Code), a permit is required for most construction activities:
Permit required
- New residential and commercial construction, additions
- Structural and load-bearing alterations
- Re-roofing of commercial and multi-family buildings, windows, and structural exterior changes
- Electrical service changes and most wiring work
- HVAC installations and changeouts
- Plumbing alterations, repipes, and water heaters
- Decks, pools and pool barriers, 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 accessory buildings ≤ 200 sq ft used as tool or storage sheds, playhouses and similar (setbacks still apply)
- Fences, other than swimming pool barriers
- Re-roofing of one- and two-family dwellings and non-commercial detached accessory structures, and re-siding (County Code Section 29-2-20)
Exemptions are narrow and scope-specific. When unsure, confirm with the building department before starting — see the penalty note below.
Short on time to read all of this?
Get a free quote →Get the permit issued before starting work. Building without one exposes the owner to penalties, fines, and stop-work orders. Unpermitted work can also create issues when selling the property.
Who handles permitting in Weld County?
The Building Division within Planning & Development Services handles plan review, permit issuance, and construction inspections. All permits are managed through the Weld County Online Portal.
| Detail | Information |
|---|---|
| Office | Planning & Development Services, 1402 N. 17th Avenue, Greeley, CO 80631 (mail: P.O. Box 758, Greeley, CO 80632) |
| Phone | (970) 400-6100 |
| Online portal | Weld County Online Portal |
| Code cycle | 2024 International Codes with Weld County amendments, from 15 June 2026; 2023 National Electrical Code |
| Hours | Monday to Friday, 7:30 a.m. to 4:30 p.m. |
| Contractors | Name the general, plumbing, mechanical and electrical contractors on the application, with state licence numbers for the plumbing and electrical contractors |
Apply at the Weld County Portal. Register an account on the Weld 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.
Weld County building permit cost
Weld County permit fees are valuation-based per county fee schedule.
Not sure this scope needs a permit?
Get a free quote →| Fee component | How it works |
|---|---|
| Residential building permit | Valuation-based formula |
| Commercial building permit | Valuation-based formula |
| Plan review fee | 70% of the building fee for new single-family dwellings, all commercial buildings and new utility buildings over 3,000 sq ft; flat $80 for residential additions and alterations under 1,000 sq ft, manufactured homes on engineered foundations and new utility buildings under 3,000 sq ft (January 2026 fee schedule; the County’s web page text still shows the earlier 65% and $50) |
| Trade permits (E / P / M) | Separate fees per trade |
| Impact fees | New single-family dwelling: road impact fee $3,794 and county facilities fee $1,636; drainage fee $0.22 per sq ft of impervious area on all land uses (January 2026 fee schedule) |
| Work-without-permit | An investigation fee of 50% of the permit fee is added to the cost of the permit |
Want a precise number for a specific Weld County project? Send us the scope and valuation and we'll return a fee estimate alongside a filing timeline.
Weld County trade permits
Electrical, plumbing, and mechanical work each needs its own permit and appropriately licensed tradespeople. In unincorporated Weld County these permits come from the County’s Building Division, not the State: the State’s electrical and plumbing permit office lists Weld among the counties that run their own inspection programs.
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. The County reviews electrical work under the 2023 National Electrical Code with the local amendments in Section 29-2-70 of the County Code. The State Electrical Board’s Rule 1.5 moved the State to the 2026 edition on 1 August 2026, but the County’s code page and Chapter 29 still name the 2023 edition.
Rather talk it over?
Call 1-855-478-4290 →Plumbing permits
Required for new plumbing, repipes, water heater changeouts, fixtures, backflow, and sewer connections — performed by a plumbing contractor registered with the Colorado State Plumbing Board, using plumbers it licenses.
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 State Plumbing Board. 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 with Colorado's license verification lookup.
How to get a building permit in Weld County
Confirm permit requirement & zoning
Contact Planning & Development Services at (970) 400-6100. Confirm zoning compliance and whether your project requires a permit.
Register on Weld County Portal & apply
Create an account on the Weld 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 review against the 2024 International Codes with Weld County amendments. The county publishes no standard review time; ask at submittal. 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 Weld County Online Portal. Typical checkpoints: foundation, framing, rough-in MEP, insulation, final. Certificate of Occupancy required before occupancy.
Rather not deal with the Weld County building department?
Get a free quote →Inspections in Weld County
Schedule inspections through the Weld 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 Weld County permitting resources
- 🏛️ Weld County — Building
- 💻 Weld County Permits & Records
- 📋 Weld County Building Permits & Inspections
- 🪪 CO State Electrical Board
Frequently asked questions
Who issues building permits in unincorporated Weld County?
The Building Division of Weld County Planning & Development Services, 1402 N. 17th Avenue, Greeley, phone (970) 400-6100, open Monday to Friday, 7:30 a.m. to 4:30 p.m. Applications are filed through the Weld County Online Portal. Cities and towns inside the county run their own permitting.
Want this handled start to finish?
Get a free quote →Which building codes does Weld County enforce?
The 2024 International Codes with Weld County amendments (Chapter 29 of the County Code) have applied since June 15, 2026. Electrical work is reviewed under the 2023 National Electrical Code with the local amendments in Section 29-2-70.
How much is plan review in Weld County?
Under the January 2026 fee schedule it is 70% of the building fee for new single-family dwellings, all commercial buildings and new utility buildings over 3,000 sq ft, and a flat $80 for residential additions and alterations under 1,000 sq ft, manufactured homes on engineered foundations and new utility buildings under 3,000 sq ft. The plan review fee is paid when you submit.
What impact fees apply to a new house?
The January 2026 fee schedule lists a road impact fee of $3,794 and a county facilities fee of $1,636 for a new single-family dwelling, plus a drainage fee of $0.22 per square foot of impervious area.
Do I need a permit for a fence or a new roof on my house?
Usually not. County Code Section 29-2-20 exempts fences other than swimming pool barriers, re-roofing of one- and two-family dwellings and non-commercial detached accessory structures, and re-siding. Re-roofing a commercial or multi-family building does need a permit, and so does a pool barrier.
Who issues electrical and plumbing permits in Weld County?
The County’s Building Division, not the State: the State’s electrical and plumbing permit office lists Weld among the counties that run their own inspection programs. The electrical and plumbing contractors must still hold their state licence or registration.
What happens if work starts without a permit?
The fee schedule adds an investigation fee of 50% of the permit fee to the cost of the permit, and the County can stop the work until the permit is issued.
Inspections are where schedules slip.
Get a free quote →Simplify Weld County permitting with Alliance Permitting
Weld County's Weld 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 Weld County — our permit expediting services in Colorado pair AI-driven document review with experts who know the Planning & Development Services process, so your Weld County submissions move faster.
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Contractors and builders choose Alliance for Weld County because we deliver:
- Local expertise — we know Planning & Development Services, the Weld County Online Portal, and the 2024 International Codes with Weld County amendments.
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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 Weld County building permit?
Get your Weld County project permitted right. Alliance Permitting handles your applications through the Weld 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 Planning & Development Services before filing. This is not legal advice.