3rdGen Heating & Cooling

[ 01 ] Service area · Walnut Creek & Central Contra Costa

Residential HVAC in Walnut Creek & Central Contra Costa

Walnut Creek, Pleasant Hill, Concord, and Martinez homes often need heat pumps and duct redesign sized for inland summer heat — not builder-grade same-size replacements. We take on design-build scopes that match our premium project model.

Local context

Homes across Walnut Creek & Central Contra Costa

Suburban two-story homes, Rossmoor and similar communities, and aging builder-grade HVAC ready for full redesign and electrification.

Climate

Regional conditions

Central Contra Costa runs warmer than the inner bay in summer. Cooling loads on upper floors and west-facing rooms drive Manual J sizing — especially in two-story suburban homes.

Cities in this region

Process

From first call to startup in Walnut Creek & Central Contra Costa

01

Tell us about your home

Share location, timeline, plans if you have them, and what is not working today — or what your builder has scoped.

02

Size & design the system

We use Manual J, S, and D where the project needs it to match equipment, ducts, and zoning to the actual house.

03

Coordinate & install

Principal-led field work with your GC or architect around access, finishes, sequencing, and clean rough-in.

04

Startup & handoff

System startup, basic orientation, and documentation so you know how the new system is meant to run.

FAQ

Frequently asked in Walnut Creek & Central Contra Costa

Which Central Contra Costa cities do you cover?

We serve Walnut Creek, Pleasant Hill, Concord, and Martinez on whole-home HVAC design-build projects when scope and fit align with our project model.

Are heat pumps enough for Walnut Creek summers?

Yes, when Manual J sizing accounts for inland cooling loads and equipment is selected accordingly.

Do you replace builder-grade HVAC in newer homes?

Yes, when the scope is a full-system redesign — ducts, zoning, and equipment — not a low-ticket swap.

Do you offer emergency AC repair?

No. We are a design-build installation specialist focused on engineered replacements and remodels.

What is a typical project size?

Most whole-home design-build scopes start around $20k because they include engineering, distribution work, and premium equipment.

Contact

Planning an HVAC project in Walnut Creek & Central Contra Costa?

Share your city, timeline, and a short description of the project. If it looks like a fit, a principal will follow up within one business day.

Best-fit residential scopes include heat pump installations, all-electric conversions, full-system HVAC replacements, retrofits, remodels, new construction, ADUs, and Manual J/S/D-supported design-build work. 3rdGen is not structured around emergency repair, routine maintenance, tune-ups, filter changes, or small service calls.