Window Replacement in Houston, Texas

In Houston, replacing windows usually means a city permit. The Houston Permitting Center lists "non-exempt structural repairs such as replacing windows" among the work that requires a permit, and its list of residential exceptions does not include window replacement (Houston Permitting Center overview) ¹. The city does not license or register general contractors, so the checks on the installer fall to you ¹.

Two other things shape a Houston window job. If the house is in one of the city's historic districts or is a designated landmark, window replacement visible from the street needs approval from the city's Office of Preservation or its historic commission first, and a policy approved in December 2025 rules out vinyl, with limited exceptions (Window Replacement policy) ³⁴. And Harris County sits in ENERGY STAR's Southern climate zone, where the criteria cap how much of the sun's heat the glass lets through ⁶⁷.

Do you need a permit to replace windows in Houston?

The Houston Permitting Center's permit overview, presented at its annual workshop on November 19, 2024, puts window replacement on its "What requires a permit?" list, as one of the "non-exempt structural repairs" next to exterior doors, rafters and damaged studs (permit overview) ¹. The same overview lists what does not need a permit for a house, such as painting, small drywall and roof-covering repairs, and window awnings that project no more than 54 inches; replacing a window is not on that list ¹. The word "non-exempt" suggests some window work may be treated differently, so ask the Permitting Center about your exact job, especially if you plan to change an opening's size.

One permit the city publishes for this kind of work is the residential repair permit. Its page says it "is required for repairs that involve the replacement and/or repair of existing structural members and other building elements" and "applies to work that does not require a plan review provided the materials match or are equivalent to the materials being repaired or replaced" (Residential Repair Permit) ². The same page lists an inspection as required and asks for the city's Residential Repairs Spec List (CE-1059) ². Which permit fits your job, especially if an opening changes size, is a question for the Permitting Center.

How it works, from the city's own pages:

• Where to apply. Applications are made online through the city's iPermits system; for the repair permit, the spec list is then uploaded through ProjectDox ¹².
• Who may apply. The overview says a building permit "can be purchased by an owner, agent, or contractor," and that the permit is issued to the owner no matter who applied or paid ¹.
• Fees. The repair permit page points to the City of Houston fee schedule for the permit fee and lists an administrative fee of $33.56 ².
• Other trades. Electrical, mechanical and plumbing work needs its own permit ¹.

Ask every installer who quotes the job: who pulls the permit, and is its cost in the price? The article on whether you need a permit to replace windows explains why the answer differs from city to city.

Who may do the work

The Permitting Center's overview says plainly: "The City does not license or register general contractors" ¹. Houston does register trade contractors. The overview says a master electrician, an air conditioning contractor and a master plumber must each hold a state license and be registered with the City of Houston, and that those contractors buy the trade permits after the building permit, although in some instances a homeowner may obtain the plumbing permit (permit overview) ¹. Window installation is not one of those trades.

At the state level, the list of programs regulated by the Texas Department of Licensing and Regulation includes air conditioning contractors and electricians but no window or general home-improvement contractor program (TDLR) ¹⁰; the Texas page covers the state picture and the agency's license search. In practice, that leaves you to ask the questions yourself:

• Is the installer registered or licensed anywhere, and can you check it?
• Will the company pull the Houston permit in your name, as owner?
• Can you see recent Houston jobs and talk to those homeowners?

The guide on how to choose a window installer covers the rest of the vetting.

Historic districts: the city's window policy

Houston's Office of Preservation, part of the Planning and Development Department, reviews Certificates of Appropriateness for alterations to historic structures. Its page says that as of January 2026 the city has 23 historic districts, 305 landmarks and 213 protected landmarks, and it links an interactive map to check an address (Houston Office of Preservation) ³. Certificates are issued by the Houston Archaeological and Historical Commission (HAHC), a 13-member appointed commission, or by the department's director, and the window policy says acceptable materials and designs may be approved administratively by the director or referred to the HAHC ⁴.

The department's Window Replacement policy (No. 1-1, approved December 3, 2025) applies to street-visible window replacement on landmarks, protected landmarks and properties in historic districts (Window Replacement policy) ⁴. In short:

• No vinyl. Vinyl windows "shall not be approved" on landmarks or on contributing and non-contributing buildings in historic districts ⁴.
• Materials. For most designated buildings, acceptable materials are wood, wood-clad and wood composite; for Mid-Century Modern buildings, aluminum may be acceptable ⁴.
• Repair first. Original historic windows must be evaluated for repair before replacement is considered, with documentation (photos, condition reports or contractor assessments) showing why replacement is warranted ⁴.
• Fit and depth. New units must match the original in sash dimensions, muntin configuration, profile and operation, and be "inset and recessed," defined as a minimum 1 3/4-inch inset depth from the exterior casing to the face of the window unit (upper sash) when installed. Stock or standard-sized units that alter the size of the original openings are not permitted ⁴.
• Approval before buying. Applicants apply for a Certificate of Appropriateness or a pre-application design review on the city's Historic Preservation Tracker before buying or replacing windows ⁴.

The policy says exceptions may be granted only in listed cases, among them a window opening not visible from the street, a non-original window already replaced with vinyl, or a window on an accessory structure toward the rear of the lot, and the list ends with approval of the substitution by the HAHC. It also warns that unauthorized vinyl windows may lead to enforcement, including fines or required removal ⁴. The office's exemption sheet also lists storm windows, window screens and work not seen from the street among items exempt from its regulation (exemption sheet) ⁵. If your house is in a district, ask any installer whether the windows they quote meet this policy before you sign. A homeowners association may have its own rules as well; check them.

Houston's climate and what it means for the glass

ENERGY STAR places Harris County in its Southern climate zone (ENERGY STAR climate zone finder) ⁷. There, a window qualifies under the Version 7.0 criteria with a U-factor of 0.32 or less and a solar heat gain coefficient (SHGC) of 0.23 or less, and every ENERGY STAR window must also meet an air leakage limit of 0.3 cubic feet per minute per square foot (ENERGY STAR criteria) ⁶.

SHGC is the share of the sun's heat that passes through the glass, and the Southern-zone cap of 0.23, shared with the South-Central zone, is the lowest SHGC limit in ENERGY STAR's table ⁶. Houston's weather explains why heat gain matters more than heat loss. NOAA's 1991-2020 normals for Houston Intercontinental Airport show an average summer (June to August) high of 93.9°F and about 111 days a year reaching 90°F or more, against about 10 days a year with a low of 32°F or colder (NOAA climate normals) ⁸. Normal annual precipitation is 51.84 inches, so flashing and sealing around a new window deserve as much attention as the glass ⁸.

Questions to put to each quote:

• What are the NFRC-rated U-factor and SHGC of the exact unit quoted, and do they meet the Southern-zone criteria?
• Which low-E coating is on the glass, and does it differ between west- and south-facing windows and the rest?
• How will the installer flash and seal the opening?

The energy-efficient windows explainer and the article on low-E glass go deeper.

What window replacement costs

This article does not quote a Houston price, because the cost surveys it relies on report national figures. As a national reference, Fixr reports an average of about $800 per window nationally, typically $450 to $1,200 (updated January 21, 2026) ⁹. The window replacement cost guide sets several national surveys side by side and explains why they differ. Your own written quotes are the local number that matters for your house.

Getting quotes in Houston

Get at least two or three written quotes that name the brand and series, the glass package, full-frame or insert installation, disposal, and who pulls the permit. The article on how to compare window quotes shows how to line them up. When you are ready, you can compare quotes from window installers in the Houston area.

About these figures

• ¹ Official record: Houston Permitting Center permit overview (window replacement listed among non-exempt structural repairs that require a permit, the residential exceptions including awnings up to 54 inches, iPermits and ProjectDox, who may buy a permit, the city not licensing or registering general contractors, trade contractor registration), November 19, 2024, checked October 26, 2026.
• ² Official record: Houston Permitting Center Residential Repair Permit page (scope, conditions, inspection, spec list, online application through iPermits and ProjectDox, fee schedule reference and $33.56 administrative fee), checked October 26, 2026.
• ³ Official record: Houston Office of Preservation page (23 historic districts, 305 landmarks and 213 protected landmarks as of January 2026; Certificates of Appropriateness), checked October 26, 2026.
• ⁴ Official record: Planning and Development Department Window Replacement policy 1-1, approved December 3, 2025 (scope, vinyl not approved, acceptable materials, repair first, 1 3/4-inch inset, approval before purchase, exceptions, enforcement, 13-member HAHC), checked October 26, 2026.
• ⁵ Official record: Houston Office of Preservation exemption sheet dated January 5, 2021 (storm windows, screens and work not seen from the street exempt), checked October 26, 2026.
• ⁶ Official record: ENERGY STAR Version 7.0 residential window criteria (Southern U-factor 0.32 and SHGC 0.23; air leakage 0.3 cfm per square foot), checked October 26, 2026.
• ⁷ Official record: ENERGY STAR county climate zone list (Harris County in the Southern zone), checked October 26, 2026.
• ⁸ Official record: NOAA 1991-2020 climate normals for Houston Intercontinental Airport (summer average high 93.9°F, about 111 days at 90°F or more, about 10 days at 32°F or below, 51.84 inches of precipitation), checked October 26, 2026.
• ⁹ Reported: Fixr national window replacement cost (about $800 per window, typically $450 to $1,200; updated January 21, 2026), checked October 26, 2026.
• ¹⁰ Official record: Texas Department of Licensing and Regulation home page (list of regulated programs, with no window or general home-improvement contractor program), checked October 26, 2026.