All window styles, all materials, installed by licensed East Bay professionals with 20+ years of experience. Free estimates, in-home or remote.
Get Your Window EstimateWhether you're replacing a single drafty window or upgrading every window in your home, Windows 4U handles it all. We work with premium vinyl, fiberglass, aluminum, and wood windows from leading manufacturers and offer both retrofit (pocket) replacement and new construction to suit your home's specific needs.
Every major style, in every material. Tap a style to see how it works, where it fits best and which brands make it.
Casement
Cranks open on a side hinge. Tightest seal and full airflow.
Casement windows →
Double-Hung
Both sashes slide and tilt in. The classic for older homes.
Double-Hung windows →
Sliding
Glides sideways. The direct upgrade for old aluminum sliders.
Sliding windows →
Picture
Large fixed glass for views and light.
Picture windows →
Bay & Bow
Projects from the wall for light from three sides.
Bay & Bow windows →
Awning
Hinged at the top, so it can stay open in the rain.
Awning windows →
Single-Hung
The classic look with one moving sash, at a lower cost.
Single-Hung windows →
Arched & Specialty
Arches, rounds and custom shapes built to fit.
Arched & Specialty windows →
Rated 5.0 on Google (28 reviews) and 4.9 on Yelp (27 reviews). Real reviews, in our customers’ own words.
“When the team arrived they were right in their window and while we thought it would be a two day job, they stayed late to get all of them done in one day. … The quote for the job is what we paid, there were not add ons or any business like that, that I have seen from many other contractors.”
“I got bids from 2-3 different places and these folks were both the fastest to the respond and the best price. … They installed all the windows and door in one day and the team that was onsite worked HARD.”
“Within one minute of seeing my faulty windows, he informed me that the high quality manufacturer had a lifetime and transferrable guarantee. … I very much appreciate their honesty, integrity and kindness.”
Free estimate · No obligation
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The frame material changes the look, the upkeep and how the window handles our summer heat.
Vinyl
Best value, no painting, strong insulation.
Vinyl windows →
Fiberglass
Stable in heat, slim frames, holds dark colors.
Fiberglass windows →
Wood
Authentic look for Craftsman and historic homes.
Wood windows →
Wood-Clad
Wood inside, low-maintenance cladding outside.
Wood-Clad windows →
Aluminum
The slimmest frames, for mid-century and modern homes.
Aluminum windows →
Five window brands, from value vinyl to wood-clad. Each page shows the collections and which ones fit East Bay homes.
Real jobs completed by our crew across the East Bay.
We assess every opening and recommend the right approach. We'll never upsell you to a more invasive method when a simpler one will do the job properly.
The new window unit is inserted into your existing frame. Your stucco, siding, and exterior paint stay completely undisturbed. Faster, less expensive, and the right choice when the existing frame is structurally sound. Most Bay Area replacements use this method.
Everything comes out: glass, frame, sill, and casing, down to the rough framing. This is the right approach when the existing frame is rotted, damaged by water, or when the frame itself has been leaking and the structural framing behind it is compromised. Also used for new builds, additions, and resizing an opening. We rebuild from the studs, waterproof properly, and install the new unit from the ground up.
All installations meet California Title 24 energy standards and comply with applicable fire codes and construction regulations.
Want to go deeper before your estimate?
Read our homeowner guides: signs you need new windows, glass for hot summers, permits and more →