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Sarmento Bros. Construction Inc. logo — Commercial Construction, Tenant Improvements, ADU, Design-Build

Commercial General Contractor in Walnut Creek, CA

Walnut Creek is the East Bay's retail and office hub — Broadway Plaza, medical offices, and downtown restaurants generate constant TI demand. We build commercial spaces in Walnut Creek that hold up to its standards.

CSLB #1130548 · Licensed, Bonded & Insured · Serving Walnut Creek from Manteca, CA

A Local Contractor, Actually Local

Why Walnut Creek Businesses and Homeowners Call Us

We're a family-owned general contractor headquartered in Manteca — close enough to Walnut Creek that our crews are on your site without travel-day pricing, and local enough that our reputation in Contra Costa County is worth more to us than any single job.

Every Walnut Creek project runs under CSLB #1130548 with full general liability and workers' comp coverage, permits pulled with the city, and a written schedule you can hold us to. That's the arrangement on every job, at every size.

  • Free on-site estimates in Walnut Creek
  • Permits handled with the city
  • 5.0★ rated across four platforms
  • 24/7 commercial emergency response
Sarmento Bros. Construction — 5.0 star rated contractor serving Walnut Creek, CA on Google, Yelp, Thumbtack, and Angi

Planning a project in Walnut Creek?

Tell us what you're working on. We'll walk the space, talk through options honestly, and give you a real number — free.

Request a Free Estimate

Common Questions

Working With Us in Walnut Creek

Do you charge extra to work in Walnut Creek?+

No. Walnut Creek is inside our standard service area — we're based in Manteca and run projects throughout Contra Costa County, so there are no travel charges or minimums specific to Walnut Creek.

Do you handle permits with the City of Walnut Creek?+

Yes. We prepare drawings, submit to the Walnut Creek building department, respond to plan-check corrections, and schedule inspections. Permit handling is included in how we run every job, not an add-on.

What kinds of projects do you take on in Walnut Creek?+

Commercial tenant improvements, office and retail build-outs, restaurant construction, and commercial remodels — plus ADUs, kitchen and bathroom remodeling, and custom homes. If you're not sure your project fits, call 209-637-7379 and ask; the conversation is free.