Windows 4U serves Martinez homeowners throughout the city, from downtown and the Waterfront District to Alhambra Valley, Vine Hill, and Hidden Valley, with licensed, in-house window and door installation backed by a 4-year workmanship warranty.
Get a Free Martinez EstimateMartinez is one of the oldest cities in Contra Costa County, and its housing stock reflects that history, Victorian-era homes downtown, bungalows from the early 1900s, and post-war construction throughout the hills. Replacing windows in older homes requires care: understanding original construction methods, navigating plaster walls, and selecting windows that complement the home's character. Windows 4U has the experience to do this work right. Alex and Leon Elbert lead every job personally, and they'll give you a straight answer on what your home actually needs.
Every service is performed by our in-house crew. No subcontractors, ever.
Retrofit and full-frame window replacement in vinyl, fiberglass, and aluminum. Casement, double-hung, sliding, picture, bay & bow, all styles installed with precision and minimal disruption to your home.
Learn more →Steel and fiberglass entry doors that improve your home's curb appeal, security, and energy efficiency. Includes full hardware installation and weatherstripping.
Learn more →Sliding glass doors and French-style patio doors for Martinez homes with backyard access or Carquinez Strait views. Vinyl, aluminum, and fiberglass systems available.
Learn more →Many Martinez homes have original wood windows from the 1920s through 1950s that have reached the end of their lifespan, painted shut, rotted sills, single-pane glass that fogs in winter. We know how to replace these windows cleanly, preserving the character of the opening while delivering modern energy performance. We also know when to recommend a full-frame replacement versus a retrofit, and we'll always give you our honest assessment.
We're based in Walnut Creek, right next door. Call us and you'll speak directly with Alex or Leon, not a dispatcher.
Also serving neighboring cities: Concord, Pleasant Hill, Walnut Creek, Clayton, and the wider East Bay.
"Our downtown Martinez home was built in 1938 and the original windows were finally giving out. Alex came out, explained exactly what they'd do to retrofit new windows without damaging our plaster walls, and delivered on every promise. Beautifully done and they cleaned up perfectly."
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