Windows4U
Windows4U replaces windows and exterior doors in Walnut Creek and the East Bay. Founded by brothers Alex and Leon Elbert, it handles both retrofit and new-construction window installations.
Business Highlights
- Windows4U lists California Contractor License #1097508 and says it is fully licensed, bonded and insured.
- Alex and Leon have over 20 years of experience in the window and door industry.
- An in-house crew handles every installation; Windows4U does not use subcontractors.
- Windows4U offers a 4-year workmanship warranty for every installation.
- Most windows and doors come with a manufacturer's lifetime product warranty.
Service Area
Walnut Creek, Concord, Pleasant Hill, Lafayette, Danville, San Ramon, Martinez, Orinda, Brentwood, Clayton, Moraga, Alamo, Oakland, Berkeley, Pittsburg, Antioch, Oakley, Livermore and Dublin; San Francisco and San Jose for select projects.
Featured on ProsGrade. Windows4U is one of 7 window installers ProsGrade lists in Walnut Creek, California.
3 services listed: Window replacement, Entry door replacement and Patio and sliding doors. Open Monday to Saturday. Rated 5.0 from 23 reviews.
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- Published local profile
How This Business Compares
How Windows4U compares with the other 6 window installers on ProsGrade in Walnut Creek, using public Google ratings and review counts.
- Ranks in the top half of the 7 Walnut Creek window installers on ProsGrade by Google rating and review volume.
- Rated 5.0 on Google, at or above the 4.9 average of other Walnut Creek window installers on ProsGrade.
- One of 5 Walnut Creek window installers on ProsGrade rated 4.7 or higher from at least 10 reviews.
Services Covered
3 services- Window replacementCasement, double-hung, bay and bow, picture, slider, awning and single-hung; retrofit or new construction; vinyl, fiberglass, aluminum and wood.
- Entry door replacementFiberglass, steel and wood; front, back, side and house-to-garage doors.
- Patio and sliding doorsTwo-, three- and four-panel sliders; vinyl, aluminum and fiberglass; French-style patio doors.
Reviews
What customers say
Recent customers praise the team's professionalism and responsive, clear communication. A customer with a leaking balcony door valued Alex's diagnosis of the problem and explanation of the flashing work intended to prevent future leaks.
Customer Reviews
Ivan Llanos
Matt Trenkwalder
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Frequently Asked Questions
How long are Windows4U's product lead times?
After an estimate is approved, product lead times typically run 3–5 weeks. Custom sizes, specialty glass and premium product lines may take longer.
How should homeowners prepare for a Windows4U installation?
Windows4U asks homeowners to clear a 3-foot path around each opening and move furniture away from the work area.
Does Windows4U install customer-supplied windows or doors?
No. It installs only products it supplies and orders itself.
Does Windows4U repair existing windows or replace glass alone?
No. Windows4U handles full replacements, not repairs or glass-only replacements.








