Contra Costa County, CA

Window Replacement in Contra Costa County

We’re based in Walnut Creek, in the middle of Contra Costa County, and we replace windows and doors in twelve of its cities and towns. From Martinez on the Strait to Brentwood in the east, our own crew does every job.

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One Crew, Twelve Contra Costa Communities

Contra Costa is a big, varied county. Lamorinda’s wooded hills, the hot central valley around Concord and Walnut Creek, the San Ramon Valley’s planned communities and East County’s newer subdivisions all need different things from a window. We know the differences, and we tailor every estimate to the city, the street and the way the house faces the sun.

Cities We Serve

Contra Costa Cities We Serve

Each page covers that city’s homes, permits and the windows that suit them.

Walnut Creek Our home base. Mid-century ranches, Rossmoor and hillside homes. Windows in Walnut Creek → Concord 1950s to 70s ranches with original aluminum, and Clayton Valley HOAs. Windows in Concord → Pleasant Hill Postwar Gregory Gardens homes and townhomes by BART. Windows in Pleasant Hill → Lafayette Mid-century ranches, inland heat and hillside fire zones. Windows in Lafayette → Orinda Mid-century hillside homes on wooded, fire-zone lots. Windows in Orinda → Moraga 1960s and 70s homes and planned communities. Windows in Moraga → Danville 1970s to 90s homes, Blackhawk and Diablo. Windows in Danville → Alamo Ranches and estates, with county permits. Windows in Alamo → San Ramon Twin Creeks aluminum and Dougherty Valley builder windows. Windows in San Ramon → Martinez Older downtown homes, trains and Strait wind. Windows in Martinez → Clayton Oakhurst and homes beneath Mount Diablo. Windows in Clayton → Brentwood 2000s homes and 100-degree East County summers. Windows in Brentwood →
Across the County

What Changes Across Contra Costa

The same window isn’t right everywhere in the county.

Two climates

Central and East County summers run hot, so heat-control Low-E glass matters most there. Lamorinda canyons and the waterfront run cooler and damper.

City or county permit

Incorporated cities issue their own permits. Unincorporated areas such as Alamo, Blackhawk, Diablo, Contra Costa Centre, Pacheco and parts of Alhambra Valley go through Contra Costa County.

Fire hazard zones

Much of Lamorinda and the foothills of Mount Diablo and Las Trampas are mapped fire hazard zones, where tempered dual-pane glass may be required.

HOAs everywhere

Rossmoor, Blackhawk, Oakhurst, Dougherty Valley, Summerset and many more review window changes. We prepare the paperwork.

Freeway corridors

I-680, Highway 24, Highway 4, Highway 242 and BART run through the county. Sound-rated glass helps homes along them.

Every era of home

From pre-war Martinez to 2000s Brentwood, each era has its own window problems, and we’ve seen them all.

Our Recommendations

Which Windows Fit Your Part of the County?

Where we usually land, depending on where in the county you live.

Hot central valley: Concord, Walnut Creek, Pleasant Hill, ClaytonVinyl or fiberglass with heat-control Low-E
Lamorinda hills: Lafayette, Orinda, MoragaFire-zone glass, view windows, slim frames
San Ramon Valley: Danville, San Ramon, AlamoHOA-matched colors, fiberglass for sunny walls
East County: BrentwoodStrongest heat control, triple-pane options
Waterfront and older homes: MartinezPeriod styles, sound glass near the tracks
Unincorporated areas: Alamo, Blackhawk, DiabloCounty permits handled for you
Explore Windows

Window Styles and Materials

Learn about the options before your estimate.

Casement windows → Sliding windows → Double-hung windows → Picture windows → Vinyl windows → Fiberglass windows → Wood-clad windows → Brands we install →
Common Questions

Contra Costa County Window FAQ

Answers to what we hear across the county.

We serve the twelve cities and towns listed above and the unincorporated communities around them, including Blackhawk, Diablo, Pacheco and Alhambra Valley. If you’re not sure, just ask.
Incorporated cities issue their own. Unincorporated areas go through Contra Costa County. Many replacements need a permit and all must meet Title 24, and we handle it either way.
For most of the central and eastern county, Low-E glass designed for hot climates. In cooler Lamorinda canyons, a balanced all-climate glass is often enough. We choose room by room.
Yes, constantly. We prepare specs, colors and grid details for the HOA and order only once you’re approved.
It depends on the number, size, style, material and glass of your windows. We measure first, then give you a fair, detailed written quote for free, and the quote is the price.
Never. Every installation in every city is done by Alex and Leon’s own in-house crew.

Free estimate · No obligation

Get a Free Quote Anywhere in Contra Costa County

Tell us where you are and what you want to replace. Alex or Leon will measure, walk you through the options that fit your area, and send a fair written quote. We usually reply within 48 hours.

  • Free, no-pressure estimates
  • Our own crew, no subcontractors
  • 5.0 on Google, 28 reviews
  • 4-year workmanship warranty

Prefer to talk? Call or text (925) 393-3578

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