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§ CO Jefferson County
County building permits

Unincorporated Jefferson County

How to apply for a building permit in unincorporated Jefferson County, Colorado. Permit authority, application steps, fees, and inspection requirements.

Last verified
April 2026
On this page 6
§ 01

Permit authority

Jefferson County Division of Building Safety

Street address
100 Jefferson County Parkway, Suite 3540, Golden, CO 80419
Phone
303-271-8260
Email
buildingsafety@jeffco.us
Coverage
Covers unincorporated Jefferson County outside incorporated city/town limits. Separate review may also be required from Planning and Zoning, local fire districts, Public Health, floodplain, access/roadway, or OWTS programs.
Online portal
Jeffco Citizen Portal
Jeffco Citizen Portal
Website
Department website
Additional resources
§ 02

When a permit is required

Permit triggers and exempt work for Jefferson County

Required for building, electrical, mechanical, plumbing, reroofing, and other covered construction activities in unincorporated Jefferson County.

Minor repair and maintenance work such as interior decorating
Painting
Window covering installation
Drywall patching
Masonry repair
  • Exempt Minor repair and maintenance work such as interior decorating
  • Exempt Painting
  • Exempt Window covering installation
  • Exempt Drywall patching
  • Exempt Masonry repair

Note: Jeffco does not provide one simple consolidated exemption handout on the core permit pages reviewed. Confirm exempt status with Building Safety before starting work, especially for structures, systems, reroofing, and site-related work.

Required documents
  • County submittals commonly require application, plans in PDF format, site plan, structural and energy documents, calculations, truss documents, and project-specific zoning/site documentation
  • Commercial submittals require full MEP and related documents where applicable
Building code
2018 IRC, 2018 IBC, 2018 IECC, 2018 IEBC, 2018 IFGC, 2018 IMC, 2018 IPC, 2023 NEC, plus Jefferson County building and residential code supplements and wildfire Appendix Z where applicable.
Owner-builder
Property owners acting as contractor for one residential dwelling or accessory buildings for their own personal use and occupancy may qualify for the homeowner/builder contractor-license exemption; two or more residences in 24 months makes the person a contractor for county licensing purposes.
Contractor requirements
County license required for general, roofing, and mechanical contractors in unincorporated Jefferson County; plumbers and electricians are state-licensed trades and are not licensed by Jeffco.

Source: Jefferson County Division of Building Safety ↗

§ 03

Application process

Application → plan check → issuance → inspection → final

  1. 01
    Verify that the parcel is in unincorporated Jefferson County.
  2. 02
    Review the county plan submittal requirements and address-specific design criteria.
  3. 03
    Register for the Citizen Portal and submit the permit application with PDF plans.
  4. 04
    Include all required residential or commercial plan categories and site/zoning materials.
  5. 05
    Resolve any zoning, access, fire district, floodplain, OWTS, or engineering prerequisites.
  6. 06
    Pay permit and review fees.
  7. 07
    After issuance, schedule inspections online or by phone and complete all required final documentation.

Source: Jefferson County Division of Building Safety ↗

§ 04

Fee schedule

Jefferson County building permit fees

Fee type
Amount
01
Minimum permit fee
Verify from the current fee sheet before quoting
02
Plan check fee
65% of permit fee on permits requiring plan review
03
Permit fee formula
Unified permit fee schedule; valuation-based building permit table with listed fees for MEP and other permit categories
04
Reinspection fee
Reinspection fees may be assessed per Jeffco supplements; inspections are withheld when unpaid reinspection fees are outstanding

Payment workflow runs through the Citizen Portal and county Building Safety office.

Fees change periodically. Confirm at the official fee schedule ↗ before budgeting.

§ 05

Required inspections

Scheduling and sequence

How to schedule
Scheduling deadline
Phone requests due by 5 p.m. the prior day; Monday inspections must be called in on Thursday if using the phone
Inspection hours
Field inspections Monday through Friday
Time windows
Phone requests due by 5 p.m. the prior day; Monday inspections must be called in on Thursday if using the phone; online windows post at 8 a.m. day-of

Typical sequence: Rough trade approvals before frame inspection; final building inspection requires insulation certificate, foundation compliance form, special inspection letter if required, and applicable fire/floodplain documentation.

Inspections will not be scheduled if stop-work orders are active or reinspection fees are unpaid; inspection results are viewable through the Citizen Portal and permit search.

Source: Jefferson County Division of Building Safety ↗

§ 06

Frequently asked

Common questions about unincorporated Jefferson County permits

01 Do I need a building permit in unincorporated Jefferson County, CO? ▸
Required for building, electrical, mechanical, plumbing, reroofing, and other covered construction activities in unincorporated Jefferson County.
02 How much does a building permit cost in unincorporated Jefferson County, CO? ▸
Building permit fees in unincorporated Jefferson County, CO are set by the local building department and vary by project type and valuation. The minimum permit fee is Verify from the current fee sheet before quoting. Fees are calculated as: Unified permit fee schedule; valuation-based building permit table with listed fees for MEP and other permit categories. Plan check fee: 65% of permit fee on permits requiring plan review.
03 How do I apply for a building permit in unincorporated Jefferson County, CO? ▸
To apply for a building permit in unincorporated Jefferson County, CO, follow these steps: 1. Verify that the parcel is in unincorporated Jefferson County. 2. Review the county plan submittal requirements and address-specific design criteria. 3. Register for the Citizen Portal and submit the permit application with PDF plans. 4. Include all required residential or commercial plan categories and site/zoning materials. 5. Resolve any zoning, access, fire district, floodplain, OWTS, or engineering prerequisites. 6. Pay permit and review fees. 7. After issuance, schedule inspections online or by phone and complete all required final documentation.
04 What work is exempt from building permits in unincorporated Jefferson County, CO? ▸
Not all construction work requires a permit in unincorporated Jefferson County, CO. The following work is generally exempt: Minor repair and maintenance work such as interior decorating; Painting; Window covering installation; Drywall patching; Masonry repair. Note: Jeffco does not provide one simple consolidated exemption handout on the core permit pages reviewed. Confirm exempt status with Building Safety before starting work, especially for structures, systems, reroofing, and site-related work. When in doubt, confirm with the local building department before starting work.
05 How do I schedule a building inspection in unincorporated Jefferson County, CO? ▸
Once your permit is issued and work reaches an inspection milestone, you can schedule a building inspection in unincorporated Jefferson County, CO via: Citizen Portal (anytime), 303-271-8260 (Monday through Thursday). Phone requests due by 5 p.m. the prior day; Monday inspections must be called in on Thursday if using the phone.
last verified April 2026 source Jefferson County Division of Building Safety ↗ entry id permits/colorado/jefferson/unincorporated
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Educational reference. Permit rules and fees change — confirm current requirements directly with Jefferson County Division of Building Safety before applying. Jaspector is not legal advice.

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