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Window and door replacement and installation in Castro Valley

AK Windows has completed many window and door projects in Castro Valley and across the East Bay, and we love working here. Our crews are in the area every week, our customers rate us 5.0 on Google and Yelp, and we will be glad to come out to your home.

Andersen Certified Contractor | 5.0 on Yelp and Google | Family-owned, 10121 Imperial Ave, Ste D, Cupertino | California contractor license 1071859 | We install Andersen, Milgard and Simonton

What the houses here are like

Castro Valley is 1950s and early 1960s stock, median year 1960, with about half the town built before 1960. Many of these houses had aluminum windows put in during the 1980s as an upgrade, and those are now the oldest thing in the house. Replacing a bad 1980s retrofit is a different job from replacing an original window, and we say which one you have at the measurement.

  • Median year built: 1960
  • Built before 1980: 76 percent
  • Built before 1960: 49 percent
  • Owner-occupied: 66 percent
  • Homes sold in the last year: 374

Housing figures from the Census American Community Survey 2023 and Redfin closed sales, for ZIP 94546.

What people here call us about

Castro Valley has a pattern of its own. A lot of these houses had aluminum windows fitted in the 1980s as an upgrade, and those are now the oldest thing in the building. Replacing a tired 1980s retrofit is a different job from replacing an original window, and which one you have changes the price. We tell you which at the measurement.

What we do in Castro Valley

  • New window and door installation
  • Custom-sized windows for openings that are no longer square
  • Wood window replacement, including repair to the sill or frame where it has gone soft
  • Whole-house replacement, and single openings when that is what you need
  • Entry, patio and French doors, in Andersen, Milgard and Simonton

How a job goes

  1. We come out and quote. We look at the openings and give you a price. The visit and the measurement are free. Our crews work in Castro Valley every week, so a visit is easy to arrange.
  2. We measure and order. The windows are ordered to your openings, not to a catalogue size.
  3. We install and finish. Install, trim and clean up.
  4. We stay reachable. After the job is done you still have our number.

Ask for a free measurement

Tell us what needs doing in Castro Valley and we will call you back the same day. Call (408) 208-5055.

Other towns we work in

All twenty towns we cover

Contact Us

10121 Imperial Ave, Ste D, Cupertino, CA 95014

© 2026 AK Windows Inc. California contractor license 1071859, C17 Glazing.

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