County Building Permits
Collin County Building Permit Guide (Unincorporated Area)
How to apply for a building permit in unincorporated Collin County, Texas. Permit authority, application steps, fees, and inspection requirements.
Permit Authority
Unincorporated areas of Collin County; commercial permits also handled through the Collin County Fire Marshal and right-of-way permits through Public Works.
- Department
- Collin County Development Services
- Phone
- 972-548-5585
Online Permit Portal
Platform: Citizen Self-Service • Account required: Yes • Submission: Online only
Application Process
- Determine permit type (residential, OSSF/septic, commercial, or right-of-way/culvert).
- For new structures on previously vacant sites, a 9-1-1 rural address application is part of the permit package.
- Submit permit application through the Collin County CSS Portal or contact Development Services.
- Pay required fees (Development, Culvert, OSSF review, or Certificate of Compliance fees as applicable).
- For commercial buildings, applications are reviewed for compliance with 2021 International Fire Code and 2021 International Building Code.
General Requirements
Residential, OSSF/septic, health, and commercial permits required in unincorporated county areas. County note: Texas counties do not operate the same broad municipal building-code program as cities; permitting is split among residential/development, OSSF/septic, commercial fire/building compliance, and right-of-way/culvert processes.
- Building code
- 2021 International Fire Code and 2021 International Building Code (for commercial buildings)
- Owner-builder
- Homeowners can apply for permits themselves.
- Contractor requirements
- Contractors do not have to register with the county.
Fees
- Payment note
- Development: $50; Culvert: $250; OSSF fees: $50 review fees to $475 for commercial systems; Certificate of Compliance: $100
Work That Does NOT Require a Permit
Contact the Collin County Development Services to confirm whether your project requires a permit before starting work.
Inspections
How to Schedule
Additional Resources
- Building code: 2021 International Fire Code and 2021 International Building Code (for commercial buildings)
- Verify contractor license: Texas Department of Licensing and Regulation
- Zoning information: View zoning info
- How to Apply for a Permit
- Citizen Self-Service FAQs
- Fire Marshal Commercial Applications
- 911 Addressing
- License lookup guide: Texas Contractor License Requirements
- Contract template: Texas Homeowner-Contractor Agreement
- Texas hub: Texas Contractor License & Permit Hub
Information on this page was last verified: March 2026. Permit rules and fees change — confirm current requirements directly with the Collin County Development Services before applying.
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