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Alteration of HVAC (Commercial/Residential) in Houston, Texas

Applicants who wish to modify or alter an existing HVAC system by adding or removing parts or equipment must obtain a mechanical permit. Plan review may be required depending on the scope of work. (HPWCODE1019)

Reviewed 2026-09-06 · Source

When you need this permit

  • Licensed contractors must register their mechanical license with the City of Houston (documents listed in Registration & Renewal Process Form CE-1308). Contractor

Required documents

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Fee schedule

Review timeline

Plan review
Not published — contact the department

How long did your Alteration of HVAC (Commercial/Residential) permit actually take in Houston?

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Inspection process

  1. 1

    Mechanical inspection (Houston Public Works Mechanical Inspections). Keep permit and approved plans (if applicable) on-site.

See the full Houston inspection guide — scheduling & re-inspection fees →

Frequently asked questions

Houston requires an alteration of hvac (commercial/residential) permit for: Licensed contractors must register their mechanical license with the City of Houston (documents listed in Registration & Renewal Process Form CE-1308).. If your project isn't listed, confirm with Houston Permitting Center — Building Code Enforcement, Permits Office at 832.394.8899 before starting work.

Houston does not publish a plan-review timeline for this permit. Contact Houston Permitting Center — Building Code Enforcement, Permits Office at 832.394.8899 for current turnaround.

You'll need: Mechanical Permit Application. See the required-documents checklist on this page for details on each.

Houston requires 1 inspection(s) for an alteration of hvac (commercial/residential) permit, in order: Mechanical inspection (Houston Public Works Mechanical Inspections). Keep permit and approved plans (if applicable) on-site.. Schedule each through Houston Permitting Center — Building Code Enforcement, Permits Office (832.394.8899).

Apply through Houston Permitting Center — Building Code Enforcement, Permits Office at 1002 Washington Ave., 1st Floor, Houston, TX 77002. Phone: 832.394.8899, email: permits_office@houstontx.gov. Office hours: 8 a.m. to 5 p.m.. Official information: https://www.houstonpermittingcenter.org/building-code-enforcement/permits.

Houston, Texas has adopted: 2021 International Residential Code, with Houston Amendments (ICC) — effective January 1, 2024; 2021 International Building Code, with Houston Amendments (ICC) — effective January 1, 2024; 2021 International Existing Building Code, with Houston Amendments (ICC) — effective January 1, 2024; 2021 International Fire Code, with Houston Amendments (ICC) — effective January 1, 2024; 2021 International Energy Conservation Code, with Houston Amendments — Residential (ICC) — effective January 1, 2024; 2021 International Energy Conservation Code, with Houston Amendments — Commercial (ICC) — effective January 1, 2024; 2021 Uniform Mechanical Code, with Houston Amendments (IAPMO) — effective January 1, 2024; 2021 Uniform Plumbing Code, with Houston Amendments (IAPMO) — effective January 1, 2024; 2021 International Swimming Pool and Spa Code, with Houston Amendments (ICC) — effective January 1, 2024; 2022 Minimum Design Loads & Associated Criteria for Buildings and Other Structures, ASCE 7 (ASCE/SEI) — effective January 1, 2024; ASHRAE 90.1-2019, with Houston Amendments — Commercial (ASHRAE) — effective January 1, 2024; Sign Code, Chapter 46 of the Houston Building Code (City of Houston) — effective July 29, 2020; 2023 National Electrical Code, State Mandated, with Administrative Code Provisions (NFPA) — code effective September 1, 2023 / administrative provisions effective January 1, 2024 — SUPERSEDED, see note below; 2021 Code Words — various sections interpreted and administrative policies (City of Houston). Local amendments apply — see the Houston overview page for the full list.

Sources & verification

Key facts verified against official sources. Last reviewed 2026-09-06.

Department & other records

Fees, timelines, and adopted codes are researched from each jurisdiction's published records — see how we verify. Requirements change and vary by project, so always confirm the current details with the Houston building department before you submit. PermitBase is an independent reference and is not affiliated with any government agency.

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