Building permits in unincorporated Harris County — the most populous county in Texas with over 5 million residents — are issued by the Harris County Engineering Department, Permits Office. Harris County enforces the 2021 International Codes for commercial and multi-family buildings in unincorporated areas, and has required residential building permits for single-family and duplex homes since September 1, 2009.
This guide covers what requires a permit, the e-Permits portal, fees, trade permits, and inspections in unincorporated Harris County.
Harris County permits apply only to unincorporated areas. If your property is within the City of Houston or another incorporated city, you must apply through that city's permitting department. Harris County does not require a general contractor license for unincorporated areas. Projects over $50,000 require a TDLR project number and accessibility review.
What requires a building permit in Harris County?
In unincorporated Harris County, building permits are required for:
Permit required
- New commercial and multi-family construction
- Residential construction (since Sept 2009 for single-family/duplex)
- Additions, alterations, and structural modifications
- Site work including grading, utilities, landscaping, drainage
- Fire detection and suppression systems
- Change of occupancy
- Demolition
- Tenant improvements
Typically exempt
- Painting, flooring, and cosmetic work in residential
- Minor residential repairs not affecting structure
- Retaining walls ≤ 4 ft
- Agricultural buildings in certain cases
Exemptions are narrow and scope-specific. When unsure, confirm with the building department before starting — see the penalty note below.
Get the permit issued before starting work. Building without one exposes the owner to penalties and stop-work orders. Note that exemption from a building permit does not exempt a project from zoning requirements — confirm edge cases with the building department.
Who handles permitting in Harris County?
The Harris County Permits Office handles plan review, permit issuance, and inspections for unincorporated areas. Applications are submitted through the e-Permits Portal or in person. The e-Permits Support Line is available at (713) 274-3232.
| Detail | Information |
|---|---|
| Office | Harris County Permits Office (temporarily at 1111 Fannin St, 1st Floor) |
| Phone | (713) 274-3232 (e-Permits support) |
| Online portal | e-Permits Portal — permits.harriscountytx.gov |
| Covers | Unincorporated Harris County only |
| Code cycle | 2021 IBC/IRC with Harris County amendments |
| Note | Architectural plans also need Harris County Fire Code approval |
Apply through the e-Permits Portal. You can apply online at permits.harriscountytx.gov or in person. Commercial plans must also be approved by the Harris County Fire Code office. No general contractor license is required for unincorporated Harris County. Contact (713) 274-3232 for e-Permits assistance.
Harris County building permit cost
Harris County permit fees are valuation-based. A Certificate of Occupancy must be obtained before commercial buildings or lease spaces may be occupied.
| Fee component | How it works |
|---|---|
| Residential building permit | Valuation-based (since Sept 2009) |
| Commercial building permit | Valuation-based |
| Plan review fee | Included in permit structure |
| Fire code review | Separate fee for commercial |
| Trade permits | Separate fees as applicable |
| Work-without-permit | Penalties + enforcement |
Want a precise number for a specific Harris County project? Send us the scope and valuation and we'll return a fee estimate alongside a filing timeline.
Harris County trade permits
Trade permits may be required for commercial/multi-family projects. State trade licenses apply.
Electrical permits
Required for commercial electrical work — TDLR-licensed electrician required.
Plumbing permits
Required for commercial plumbing — TSBPE-licensed plumber required.
Mechanical (HVAC) permits
Required for commercial HVAC — TDLR-licensed mechanical contractor required.
Miscellaneous & specialty
Commercial permitting has nine primary functions including fire detection & suppression. Minor site development and tenant improvements carry different requirements.
Verify your contractor's license. Texas licenses electricians (TDLR), plumbers (TSBPE), and HVAC/mechanical contractors (TDLR) at the state level — contractors must register with the local municipality before pulling permits. Texas does not issue a statewide general-contractor license. Projects over $50,000 require a TDLR project number and accessibility review. The property owner is responsible for ensuring a permit is obtained. Verify trade licensure at tdlr.texas.gov and tsbpe.texas.gov.
How to get a building permit in Harris County
Confirm property is in unincorporated area
Verify your property is NOT within any incorporated city limits. If within Houston or another city, apply through that city.
Register on e-Permits & apply
Create an e-Permits account or visit in person. Submit the building permit application.
Submit plans for review
Upload construction documents. Commercial plans must also receive Harris County Fire Code approval.
Plan review & corrections
Staff reviews against adopted codes. Address comments and resubmit.
Pay fees & receive permit
Pay all fees. Certificate of Occupancy required before commercial occupancy.
Schedule inspections through CO
Schedule inspections through the Permits Office. Final inspection required for CO.
Inspections in Harris County
Schedule inspections through the Harris County Permits Office. Commercial permitting includes fire detection & suppression, accessibility, and structural inspections. A Certificate of Occupancy must be obtained before a commercial building or lease space may be occupied.
Address correction notices before requesting a re-inspection; a final inspection and Certificate of Occupancy are required before legal occupancy or use.
Official Harris County permitting resources
- 🏛️ Harris County e-Permits Portal
- 📋 Harris County Engineering — Permitting
- 🪪 TX TDLR — licensing & regulation
- 🪪 TX TSBPE — plumbing board
Simplify Harris County permitting with Alliance Permitting
Harris County's e-Permits portal, Fire Code review requirements, and distinction between incorporated and unincorporated areas reward applicants who verify jurisdiction and prepare complete packages. Alliance Permitting is a permit expediter for Harris County — our permit expediting services pair AI-driven document review with experts who know the Harris County Engineering Department process, so your Harris County submissions move faster.
Trusted by leading builders and brands — including Dream Finders Homes, Tesla, Verizon, Hyatt, and Sunnova.
Contractors and builders choose Alliance for Harris County because we deliver:
- Local expertise — we know Harris County Engineering, the e-Permits portal, and the unincorporated-area permitting requirements.
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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 Harris County building permit?
Get your Harris County project permitted right. Alliance Permitting navigates the e-Permits portal.
More Texas 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 Harris County Engineering Department before filing. This is not legal advice.