Lafayette, CA

Window Replacement & Door Installation in Lafayette

Windows 4U serves Lafayette homeowners throughout the Lamorinda corridor, from Burton Valley and Happy Valley to Reliez Valley, Springhill, and the hills above the reservoir, with licensed, in-house window and door installation backed by a 4-year workmanship warranty.

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Your Local Lafayette Window Experts

Lafayette's homes are as varied as its hillside terrain, from 1950s ranch houses in the flatlands near BART to custom builds tucked into the hills above the Reservoir. Windows 4U has worked in every corner of the city, and we understand what it takes to properly replace windows in older wood-frame homes, stucco-clad hillside properties, and everything in between. When you call us, you speak directly with Alex or Leon Elbert, the brothers who run the company and show up on your job.

Window & Door Services

Every service is performed by our in-house crew. No subcontractors, ever.

Window Replacement

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.

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Entry Door Installation

Steel and fiberglass entry doors that improve your home's curb appeal, security, and energy efficiency. Includes full hardware installation and weatherstripping.

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Patio & Sliding Doors

Sliding glass doors and French-style patio doors, ideal for Lafayette homes with views of the Reservoir or the hillside. Vinyl, aluminum, and fiberglass systems available.

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Recent Projects in the East Bay

Arched window replacement on stucco home, East Bay
Full house window replacement, East Bay
4-panel sliding door installation, East Bay
View full project gallery →

Lamorinda Knowledge, Licensed Professionals

Lafayette homes span a wide range of eras, mid-century ranches in the valley floor, 1970s hillside custom builds, and newer construction near Happy Valley Road. We know how to work with wood-frame and stucco construction, how to navigate City of Lafayette Building Department permit requirements when required, and how to match replacement windows to the architectural character of your home.

We're based minutes away in Walnut Creek. When you call Windows 4U, you reach Alex or Leon directly. No answering service, no sales rep.

  • Clean, respectful of your home
  • Direct communication with Alex or Leon
  • 4-year workmanship warranty + lifetime product warranty
  • Licensed, bonded & insured (CA Lic. #1097508)

Neighborhoods We Serve in Lafayette

Burton Valley Happy Valley Reliez Valley Upper Happy Valley Lafayette Village Springhill Camino Diablo Deer Hill

Also serving neighboring cities: Walnut Creek, Orinda, Moraga, Pleasant Hill, and the wider East Bay.

★★★★★

"We had 9 windows replaced in our Burton Valley home and couldn't be happier. Alex walked us through every option, explained what made sense for our older wood-frame house, and the installation was done in one day. Our energy bills dropped noticeably the first month."

JR
Jennifer R.
Lafayette, CA · Google

Trusted Brands We Install

Milgard Alside Anlin Simonton ProVia Marvin Windsor Weather Shield

Window & Door FAQ

Quick answers to what we hear most. See our full FAQ →

Four steps: (1) You request a free estimate, either in-home or remote. (2) We measure, spec the right product, and send you a written quote. (3) Once approved, we order your windows or doors. Lead times are typically 3–5 weeks depending on what you ordered. (4) Installation day: our in-house crew does the work, cleans up fully, and walks through the finished job with you before we leave.
Full replacement only. We don’t repair broken hardware, re-seal leaking frames, or do glass-only swaps. If you’re not sure whether you need repair or replacement, just call us and we’ll give you an honest answer, not a sales pitch.
You can replace as few or as many as you need. One window, a few rooms, or the whole house. We take on all of it. Many customers start with the worst ones and come back for the rest later.
Yes. We can provide the product specs, color samples, and written documentation most HOAs require for window or door replacement approval. Just let us know your HOA’s requirements upfront and we’ll prepare what’s needed.
Yes, removal and disposal of your old windows and doors is included in every job. We clean up the work area completely before we leave. No pile of old frames sitting in your yard.
Never. Every installation is done by Alex and Leon’s own in-house crew. No day laborers, no strangers at your door. This is how we maintain consistent quality and stand behind our 4-year installation warranty.
A few things worth knowing upfront: we don’t do repairs of any kind (no hardware fixes, re-sealing, or patching), glass-only replacement, screen repair or re-screening as a standalone job, interior door installation, or installation of windows and doors you’ve purchased elsewhere. We do full replacement only: windows and exterior doors, start to finish.

Get a Free Estimate in Lafayette

Call, text, WhatsApp, or fill out our form. We respond fast and can often schedule your in-home estimate within a day or two.