HVAC installation and repair in Walnut Creek and the East Bay
OTTER HVAC is a family-owned heating and cooling company based in Walnut Creek, California. We serve homeowners and light-commercial clients across the East Bay with honest diagnostics, clear written quotes, and trained technicians—not commissioned salespeople.
Every repair visit starts with a flat $69 diagnostic. We document what we find, explain options in plain language, and only proceed after you approve the work. New installations include a free in-home estimate with load calculation so equipment is sized for your home, not oversold.
We install and repair gas furnaces, central air conditioners, heat pumps, ductless mini-splits, rooftop package units, VRF systems, ductwork, and thermostats. Commercial refrigeration support covers coolers, freezers, and ice machines. Maintenance plans start at Otter Basic $250/unit.
Our team is EPA 608, OSHA, and NATE certified technicians. Hours are 7:00am–5:00pm, seven days a week. Call (650) 900-0440 or book online. Combined public reviews average 5.0 stars across roughly 146 Google and 151 Yelp reviews.
Service area includes Concord, Walnut Creek, Pleasant Hill, San Ramon, Danville, Dublin, Pleasanton, Livermore, Oakland, Berkeley, San Francisco, and neighboring East Bay cities. Address: 2939 Santos Ln, Walnut Creek, CA 94597.
Related: Full HVAC services · Honest pricing · Contact and booking · Heating services
Frequently asked questions
How much is a diagnostic visit?
Diagnostic visits are a flat $69. You get documented findings and a clear quote before any repair work begins.
Do new installations include a free estimate?
Yes. In-home estimates for new installation and replacement work are free and include proper sizing guidance.
What areas does OTTER HVAC serve?
We serve Walnut Creek, Concord, and the broader East Bay including Oakland, Berkeley, San Ramon, Dublin, Pleasanton, and San Francisco.
Are your technicians certified?
Yes. Our crew includes EPA 608, OSHA, and NATE certified technicians for residential and light commercial HVAC.
Explore related pages
References and credentials
- OTTER HVAC on Yelp
- California Contractors State License Board
- EPA Section 608 refrigerant certification
- EPA Section 608 refrigerant certification
- U.S. Department of Energy — Energy Saver
Authority sources: OTTER HVAC on Yelp · California Contractors State License Board · EPA Section 608 refrigerant certification