Windows 4U serves Danville homeowners throughout the San Ramon Valley, from downtown and Westside Danville to Blackhawk, Diablo, Green Valley, and Sycamore Valley, with licensed, in-house window and door installation backed by a 4-year workmanship warranty.
Get a Free Danville EstimateThanks! We've received your request and will be in touch as soon as possible, usually within 48 hours.
Danville's neighborhoods range from 1970s and 80s tract homes along the valley floor to custom luxury builds in gated communities like Blackhawk and Diablo. Many of these homes are reaching the age where original windows are failing, single-pane glass, aluminum frames that sweat in winter, builder-grade sliders that no longer seal. Windows 4U has worked throughout Danville replacing these windows with high-performance vinyl and fiberglass systems that dramatically cut noise, drafts, and energy costs. You'll speak directly to Alex or Leon Elbert when you call. Not a salesperson.
Every service is performed by our in-house crew. No subcontractors, ever.
Retrofit and new construction 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 Danville homes with backyard entertaining areas or hillside views. Vinyl, aluminum, and fiberglass systems available.
Learn more →Many Danville homes, particularly in Westside Danville and along the Iron Horse Trail corridor, were built in the 1970s and 80s, with stucco exteriors and aluminum-frame windows that are now decades past their useful life. We know how to retrofit new vinyl or fiberglass windows into these openings cleanly, how to handle HOA documentation requirements in communities like Blackhawk, and how to pull permits with the Town of Danville Building Division when the project requires it.
We're your neighbors in the East Bay. Every project is handled directly by Alex and Leon, the owners are on the job.
Also serving neighboring cities: Walnut Creek, Alamo, Concord, Pleasant Hill, and the wider East Bay.
"Leon came out to our Blackhawk home for the estimate and explained everything clearly. No pressure at all. They replaced our windows and sliding glass door over a couple of visits, organized, clean, and exactly on the timeline they gave us. The quality is exceptional. Highly recommend."
Trusted Brands We Install
