Partner station

Green Star Smog

Green Star Smog is a test-only smog check station in Concord, CA.

4.7(36 reviews)

2134 Market Street, Concord, CA 94520

This shop's smog licence isn't current with the state. Confirm with the shop before you rely on this listing.

Price

Call for price

Hours

Open Mon–Sat

Station type

Test Only

Appointments

Walk-ins welcome

Hours

Monday
9 AM – 7 PM
Tuesday
9 AM – 7 PM
Wednesday
9 AM – 7 PM
Thursday
9 AM – 7 PM
Friday
9 AM – 7 PM
Saturday
9 AM – 7 PM
Sunday
Closed

Good to know

Languages

English

Payment

Credit Card, Debit Card, NFC/Contactless

Questions about Green Star Smog

Green Star Smog holds a STAR certification that is currently suspended in the BAR registry, which means it cannot test DMV-directed vehicles until the certification is restored.


Yes. Green Star Smog is licensed as a Test Only smog station. This station performs the smog test and issues the certificate. It does not do repairs, so a failed vehicle has to be fixed elsewhere and brought back.


Green Star Smog is open Monday 9 AM to 7 PM; Tuesday 9 AM to 7 PM; Wednesday 9 AM to 7 PM; Thursday 9 AM to 7 PM; Friday 9 AM to 7 PM; Saturday 9 AM to 7 PM. Closed Sunday. Hours can change on holidays, so call ahead if you are cutting it close.


Yes. Green Star Smog accepts walk-ins, so you can drive in without booking ahead.


Green Star Smog accepts Credit Card, Debit Card, NFC/Contactless.


Google lists the following accessibility features at Green Star Smog: wheelchair accessible entrance, wheelchair accessible parking.


Green Star Smog has held a BAR smog license since 2018. You can verify the license status at bar.ca.gov.


Green Star Smog 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 (925) 687-7664 for a quote.


Green Star Smog does not take online bookings here, but walk-ins are welcome. Call (925) 687-7664 to check the wait.


Staff at Green Star Smog 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.


Green Star Smog is a Test Only station, so it cannot do the repair. You would have the work done at a repair shop, then come back for the free retest within 30 days. California's Consumer Assistance Program covers up to $1,200 of emissions repairs for qualifying owners.


How we get this data: BAR licenses and STAR status, Google hours and ratings, coupons published by the station.

Verify this station’s license and STAR standing at bar.ca.gov.

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BAR field office: Hercules • Licensed since 2018

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