5
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Had a really good experience with Contra Costa Heating & Air Conditioning. We went through their Costco partnership and had a new HVAC system installed in late Oct / Nov 2025. The install was smooth end to end, and the crew was professional, punctual, and easy to work with.
They also removed an old thermostat and patched the drywall. The first patch wasn’t great, but I called them back and they sent someone out who fixed it properly. The wall looks good as new now.
After the install, I noticed some uneven temperatures between zones. They came out, checked everything, and confirmed the thermostats were reading accurately. They even offered to replace them. I ended up resolving it myself by adjusting the system’s circulation settings, which improved airflow and evened things out.
On pricing, their initial quote came in higher than a few other vendors. That’s mainly because they use higher quality equipment and components. When I asked other vendors to match the same setup, the pricing ended up pretty close anyway. Contra Costa also offers strong guarantees on workmanship and parts, which gave me more confidence going with them.
If you’re just trying to get the cheapest install possible, they’re probably not the right fit. But if you care about doing it right and getting a solid system that will hold up over time, they’re a great choice.
Overall, very happy with how everything turned out. The system is working well, and they were responsive whenever I needed follow-up.