Castro Valley Union 76

Yes. Castro Valley Union 76 is STAR certified with the California Bureau of Automotive Repair, so it can test vehicles the DMV directs to a STAR station, including gross polluters.

No. Castro Valley Union 76 is licensed as a Test & Repair station. This station can run your smog test and, if the vehicle fails, diagnose and repair it in the same shop.

Castro Valley Union 76 is open Monday 7:30 AM to 5:30 PM; Tuesday 7:30 AM to 5:30 PM; Wednesday 7:30 AM to 5:30 PM; Thursday 7:30 AM to 5:30 PM; Friday 7:30 AM to 5:30 PM; Saturday 7:30 AM to 2 PM. Closed Sunday. Hours can change on holidays, so call ahead if you are cutting it close.

Yes. Castro Valley Union 76 accepts walk-ins, so you can drive in without booking ahead.

Castro Valley Union 76 accepts Credit Card, Debit Card, NFC/Contactless.

Google lists the following accessibility features at Castro Valley Union 76: wheelchair accessible entrance, wheelchair accessible parking, wheelchair accessible restroom.

Castro Valley Union 76 has held a BAR smog license since 1983. You can verify the license status at bar.ca.gov.

Castro Valley Union 76 has not published a price on SmogCheckDeals. The Bureau of Automotive Repair puts the statewide average at $69.16 as of August 2026, about $65 for a 2000-or-newer vehicle and $73 for 1999-or-older, plus the $8.25 certificate fee. Call (510) 581-6700 for a quote.

Castro Valley Union 76 does not take online bookings here, but walk-ins are welcome. Call (510) 581-6700 to check the wait.

Staff at Castro Valley Union 76 speak English.

Bring the car, your registration or DMV renewal notice, and a way to pay. Most smog checks take 15 to 30 minutes, and most visits are closer to 20.

Because Castro Valley Union 76 is a Test & Repair station, it can diagnose and repair the problem in the same shop, then run the free retest within 30 days. If the repair bill is steep, California's Consumer Assistance Program covers up to $1,200 of emissions repairs for qualifying owners.

The closest alternatives in Castro Valley are Larrys Automotive Service (0.2 mi) and Chabot Smog (0.3 mi). Both are listed further up this page with their ratings and hours.