The Ranking
Our top 5 window companies in Houston
Houston's housing stock gives window and door companies a wide mix of work. Bungalows in the Heights and 1950s ranches in Oak Forest and Garden Oaks often still have original wood or single-pane aluminum windows, 1970s and 1980s subdivisions tend to carry builder-grade aluminum or early vinyl units, and newer homes need larger patio doors and picture windows. Front doors take a beating from sun and driving rain, so entry door replacement is a steady job of its own.
The climate drives most of the decisions. Long, hot, humid summers mean the cooling bill is the number to cut, so look at the NFRC label on each window, which lists the U-factor and the solar heat gain coefficient, and ask for ENERGY STAR certification for the South-Central climate zone. A low solar heat gain coefficient matters more here than in colder cities. Hurricane season is the other factor, and homeowners should ask whether an impact-rated glass package is worth the cost for their home and whether it affects insurance. Old frames also swell and rot in the humidity, so ask the installer how the opening will be flashed and sealed.
Homes built before 1978 may have lead paint on old window frames. Under the EPA's Renovation, Repair and Painting rule, a company that disturbs that paint should be an EPA lead-safe certified firm, so ask for the certificate number. Texas has no state licence for window or door installers, so there is no licence number to look up. Instead, ask for a certificate of liability insurance, a written warranty on both the product and the labor, and a written quote. Ask whether your project needs a permit from the City of Houston, which is usually the case when an opening changes size. In protected historic districts, including parts of the Heights, exterior window changes may need approval from the city's historic commission, so check before you order.
This list starts from Google Maps searches for window replacement, windows and doors companies, and entry door and patio door installation in Houston, plus searches around the Heights, impact windows and sliding glass doors, merged in Google's order and checked against each company's own website. We kept companies with a street address in Houston, a working site, a real logo, at least 4.5 stars and at least 50 Google reviews, and dropped big-box stores, glass repair and auto glass shops, commercial door suppliers, suburban offices in Katy, Tomball, Stafford and Spring, multi-city lead-generation sites and sites we could not verify. Photos come from each company's own website because Google's photo service was unavailable on the day of the check. Ratings were read on November 3, 2026. Get two written quotes that name the brand, series and glass package for every opening, plus the warranty terms and who will do the installation.
