What are the Commercial Mechanical & HVAC permit rules in Texas?

Texas enforces trade permit fee schedules determined by local AHJ building departments per county. General contractors and sub-trades must maintain active state licenses and bond filings ($10,000–$50,000).

Are sub-trade contractor surety bonds required in Texas?

Yes. Most Texas municipal building departments require trade contractors to file an active license bond prior to permit issuance.

❄️ STATEWIDE TRADE HUB (TX) 3 County Workstations

Texas Commercial Mechanical & HVAC Permit Guide

HVAC tonnage rates, ductwork submittals, rooftop replacements, and COMcheck forms. Compare municipal fee structures, plan check add-on rates, and contractor bond thresholds across Texas.

Texas Commercial Mechanical & HVAC County Workstations

Select a county building department to calculate exact trade permit fees & bond rules

Harris County

Harris County Engineering Department & Houston Permitting Center

2026 Verified

Plan Review Rate: 35%

Tech Surcharge: 4%

Mandatory Surety Bond: $10,000

Open Harris County Commercial Mechanical & HVAC Workstation →

Dallas County

City of Dallas Sustainable Development & Construction

2026 Verified

Plan Review Rate: 35%

Tech Surcharge: 4%

Mandatory Surety Bond: $15,000

Open Dallas County Commercial Mechanical & HVAC Workstation →

Bexar County

City of San Antonio Development Services Department

2026 Verified

Plan Review Rate: 40%

Tech Surcharge: 4%

Mandatory Surety Bond: $10,000

Open Bexar County Commercial Mechanical & HVAC Workstation →