Top Rated Window Companies Serving Contra Costa County, CA

If you really care about choosing a quality window company, we’re here for you. Here’s your access to the best window companies serving Contra Costa County including 94565, 94509, 94806, 94513 and 94553. These window experts provide window screen replacement and wood windows, and they also work on Velux skylights, bay windows and aluminum windows. For 22 years we’ve conducted the most accurate ratings and deepest research of local companies, so you’ll be confident in choosing.

  • Last Updated Jun 03, 2026
  • 107,620 people sourced companies in Windows
    7,904 Verified Windows Customers Surveyed
7,904
107,620
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Quality Windows & Doors, Inc. is a trusted provider of premium window and door solutions for both residential and contractor clients in Alameda and Co...
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Main Services

Windows
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Doors
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Additional Services

Patio Door & Entry Door Installation, Contractor & Retail Sales, Glass Replacement for Vinyl Windows

Brands

Milgard, Andersen, Sierra Pacific Windows, Marvin, LaCantina, Simpson Door Company, Rogue Valley Door, ProVia, Masonite, Velux Skylights, Premium

Coverage Areas

Alameda County, Contra Costa County

Family Owned
Family Owned
Residential & Commercial
Residential & Commercial
Free Quotes & Consultations
Free Quotes & Consultations
Appointments Available
Appointments Available
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3732B Stanley Boulevard, Pleasanton, CA 94566
Hours CLOSED NOW
License:
865261
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West Coast Windows and Doors, Inc. provides and installs energy-efficient window and door upgrades for residential clients in Contra Costa and Alameda...
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Main Services

Windows
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Doors
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Additional Services

Sales & Installation of Windows, Sliding Patio Doors, Entry, Interior & French Doors (Contractor & Retail Sales), Security Screen Doors, Retractable Screens

Brands

Andersen, Anlin, CODEL Doors and More, Plastpro, Trimlite, Tru Frame

Coverage Areas

The East Bay

Residential Only
Residential Only
Free Quotes & Consultations
Free Quotes & Consultations
Free Estimates
Free Estimates
Live Phone Call Answers
Live Phone Call Answers
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1112 Willow Pass Court, Concord, CA 94520
Hours CLOSED NOW
License:
890083
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Quality First Home Improvement, Inc. is an award-winning contractor that sells and installs a wide range of home improvement products, including roofi...
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Main Services

Roofing
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Windows
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Doors
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Kitchen & Bath Contractor
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Coating - Exterior
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Additional Services

Exterior Coating, Painting, Patio Covers, Sunrooms, Kitchen & Bathroom Remodeling, Stamped & Colored Concrete

Brands

GAF, Mission Solar, Enphase Energy, ProVia, TEX-COTE, Duralum, ProCat Insulation

Coverage Areas

Northern California, Northern Nevada

Family Owned
Family Owned
Established in 2005
Established in 2005
Senior Discount
Senior Discount
Special Discount
Special Discount
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Hours CLOSED NOW
License:
875772
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Diamond Certified Window Companies In Contra Costa County

Diamond Certified window companies serving Contra Costa County are rated an average of 4.7 out of 5 stars based on 1614 reviews of 44 rated window companies.
Diamond Certified window companies in Contra Costa County Avg. Star Rating.

    Map of Contra Costa County, CA

    Contra Costa County was founded in 1853, and today, your 1,123,844 neighbors use window companies for window insulation, fiberglass windows, window screen replacement, energy-efficient windows, vinyl windows, and more.

    Frequently Asked Questions for Windows in Contra Costa, CA
    Q: What are customers of Diamond Certified window companies saying about companies in Contra Costa County, CA?
    A: Verified Quality Windows & Doors, Inc. Customer, 1 of 554
    "They show up on time, do a good job, and give you good value for the price. They also have quite the selection of products. I use them all the time. They're dependable and do quality work. They stand up to their name." - Marianne B.
    All Survey Responses for Quality Windows & Doors, Inc.
    Verified West Coast Windows and Doors, Inc. Customer, 1 of 431
    "I couldn't recommend them more. They met all of the needs I had and answered any and all questions. They also offered some services that others couldn't, because I have an existing structure, and I wanted new construction windows put in. They were very personable, and I felt they could be trusted." - Tania Y.
    All Survey Responses for West Coast Windows and Doors, Inc.
    Verified Quality First Home Improvement, Inc. Customer, 1 of 459
    "They are very neat and clean. My yard was pristine after they completed the job, almost like they were never there. They also assist with financing, and their staff are very responsive. The sales representative, Craig, was great. I have used them for solar, painting, and a patio cover. The patio cover is laser perfect, and the water is channeled to the gutter, instead of pooling on the cover. They are very good. Their workmanship is the best I've seen. They are the first company I call if I have a project. If they cannot do the work, they refer me to someone who can." - Janice M.
    All Survey Responses for Quality First Home Improvement, Inc.
    Q: What are some of the most popular brands that Diamond Certified window companies use when working with Contra Costa County residents?
    A: Diamond Certified window companies use top-quality brands like Loewen, Velux, Wincore, Don Young and Kolbe.
    Q: What types of replacement windows do window companies offer?
    A: Window companies offer a variety of replacement windows to suit different needs and styles. This includes double-hung windows, which have two sashes that slide vertically up and down, casement windows that open outward with a crank handle, and sliding windows that move horizontally. Other options include awning windows, which are hinged at the top and open outward, bay or bow windows that protrude from the house, and picture windows that do not open but provide ample sunlight. Energy-efficient and custom design windows are also available to cater to specific aesthetic or utility needs.
    Q: Can Diamond Certified window companies work with Andersen products and similar items so I can get window screen replacement in Contra Costa County?
    A: Yes, Diamond Certified window companies can work with Andersen products and other similar items for window screen replacement in Contra Costa County.
    Q: What did people search for when they wanted to find the best quality window companies in Contra Costa County?
    A: Bay Windows
    Casement Windows
    Replacement Windows
    Energy-Efficient Windows
    Sliding Windows