Do I need a permit for addition or structural alteration in Harris County (Unincorporated)?
Yes. In Texas, addition or structural alteration generally requires a permit, and Harris County (Unincorporated) is no exception.
Additions to a Texas home almost always require a building permit plus separate trade permits, and enclosed additions trigger full residential plan review. Outside city limits, county authority over residential building is limited, so confirm which office has jurisdiction over your property before starting. In Harris County, permits outside the cities are handled by the Harris County Office of the County Engineer - Permits, reachable on 713-274-3900 at https://oce.harriscountytx.gov/Services/Permits. Its online permit portal is https://epermits.harriscountytx.gov. This office covers the unincorporated parts of Harris County. Texas counties differ widely in how much residential work they permit, and many do not issue residential building permits at all, so confirm what your specific project needs. If your address sits inside a city, that city issues the permit instead. An addition means a full plan review, so confirm submittal requirements and current review times before you commission drawings.
Local detail for Harris County (Unincorporated): Harris County issues building permits only for unincorporated Harris County. Property inside a city (Houston, Pasadena, and others) is permitted by that city.
Documents you may need
- Permit applicationrequired
- Construction plans and drawingsrequired
- Site planLikely required
- Structural or engineering detailsSometimes required
Possible inspections
- Foundation inspection
- Framing and rough-in inspection
- Final inspection
Frequently asked questions
- Do I need a permit for addition or structural alteration in Harris County (Unincorporated)?
- Yes. In Texas, addition or structural alteration generally requires a permit, and Harris County (Unincorporated) is no exception. Additions to a Texas home almost always require a building permit plus separate trade permits, and enclosed additions trigger full residential plan review. Outside city limits, county authority over residential building is limited, so confirm which office has jurisdiction over your property before starting. In Harris County, permits outside the cities are handled by the Harris County Office of the County Engineer - Permits, reachable on 713-274-3900 at https://oce.harriscountytx.gov/Services/Permits. Its online permit portal is https://epermits.harriscountytx.gov. This office covers the unincorporated parts of Harris County. Texas counties differ widely in how much residential work they permit, and many do not issue residential building permits at all, so confirm what your specific project needs. If your address sits inside a city, that city issues the permit instead. An addition means a full plan review, so confirm submittal requirements and current review times before you commission drawings.
- Who issues the permit in Harris County (Unincorporated)?
- The local building department for Harris County (Unincorporated) handles permitting. This page lists its contact details and online portal. Your mailing city is not always the permitting authority, so confirm the jurisdiction before you apply.
- How do I find out the exact requirements for my project?
- Run the free PermitRoadmap check for your specific project and answers. It returns the likely permits, documents, inspections, and next steps, each linked to its official source.
PermitRoadmap is an independent informational service and is not affiliated with any city, county, state agency, or permitting authority. Results are informational and do not replace confirming requirements with the local permitting authority.