Three generations. One way of building.
Since 1938, Sicily, where we started. Established 1958.
We are a design-build general contractor in Martinez, serving Contra Costa County and the East Bay hills. Kitchens, bathrooms, whole-home remodels, ADUs and additions, planned completely and priced from the plans. Plans, permits and construction, all in house.
Click or tap a button to get started.
Book My 20-Minute Call See a Price Range in 30 Seconds
20 minutes by phone, at a time you pick. No charge, and nobody shows up at your door unless you ask.
Founded in Contra Costa in 1958 · 28 Google reviews, 4.9 stars · CSLB #1116913 · Rated in the top 1% of California contractors by BuildZoom
Proof you can check
- Rated in the top 1% of California contractors by BuildZoom
- BBB A+ rating
- CSLB license #1116913. Licensed, bonded and insured
- 28 Google reviews, 4.9 stars. Every review is public. Read them all before you decide.
- A written warranty, delivered at closeout
- The plans we develop are guaranteed to get you a permit
Where it started
The boy with the saw is James Mazzamuto, our CEO today.
Our family has been building since 1938, starting with a grandfather doing cabinetry and construction in Sicily. Gerolamo Mazzamuto was a carpenter and woodworker. Some of the buildings he worked on there are now considered historic. He brought his family to America in 1955 and settled in Martinez.
The company was founded here in Contra Costa in 1958. His son James built it into the general contractor it is today. James is CEO today. His sons, Gino and Mario, run it with him as President and Vice President. Three generations, the same trade, the same town.
Who you will work with
Design-build means one team owns your project from the first phone call to the final walkthrough. These are the people you will actually hear from.
James MazzamutoCEOSecond generation. Built the company into the general contractor it is today.
Gino MazzamutoPresidentThird generation. Runs the company day to day and co-hosts The Mazzamuto Method podcast.
Mario MazzamutoVice PresidentThird generation. Walks your home on the first visit and co-hosts the podcast.
Tony MazzamutoCFOFinance and insurance. Keeps the money side straight so your project stays on budget.
Marcos AmadorSalesTakes your 20-minute call. The first voice you hear.- Jackie MendezDesignerLayouts, selections, mood boards and permit-ready plans. With you from the first meeting through the build.
- Christian SagaralLead EstimatorBuilds your takeoff from the plans and walks you through it in person.
- Mike SpinelliProject ManagerPermits, materials, the schedule and your start date.
- Marc DelfinProject LogisticsPermits, orders and deliveries lined up so your job starts on time.
- TravisJob SuperintendentYour day-to-day contact once construction starts.
- Hershey VillanuevaHead of AccountingInvoices and payments, in Buildertrend, with a person behind them.
- Lynette RasonableSecretaryAnswers the phone, books your visits and keeps the paperwork moving.
- Nicole MelaraProcurementOrders, tracks and receives every material for your job.
- Jill JenkinsDesignerCabinet design and pricing in the showroom.
- Maria VilaCabinet DesignerDesigns, prices and orders your cabinets and countertops in the showroom.
How we work
Every project runs on the 16-step Mazzamuto Method. Design is completed before anything is priced. Pricing is a measured takeoff, not an estimate. Construction runs on a dependency-based schedule you can open any time. Most homeowners make it from first visit to construction start in fewer than six meetings.
Where we work
Within an hour of our Martinez office:
AlamoLafayetteOrindaMoragaDanvilleWalnut CreekClaytonPleasant HillMartinezBlackhawkDiabloSan RamonPleasantonBeniciaOakland and Berkeley hills
The showroom
Selections happen in our private showroom at 837 Arnold Drive in Martinez. Real samples, organized selections and a designer beside you. The showroom is home to Bella Casa Cabinets & Design, our in-house cabinet and countertop studio, so your cabinets are designed, priced and ordered by the same team that builds your kitchen.
The podcast
Gino and Mario host The Mazzamuto Method, a podcast about the tools to build without chaos. New episodes on YouTube: youtube.com/@mazzamutoconstruction
Ready to talk it through?
Start with the call. Twenty minutes with Marcos, straight answers on cost, schedule and permits, and a clear next step if you want one.
Click or tap a button to get started.
Book My 20-Minute Call See a Price Range in 30 Seconds
20 minutes by phone, at a time you pick. No charge, and nobody shows up at your door unless you ask.
Mazzamuto Construction Inc.
837 Arnold Drive, Suites 210 & 220, Martinez, CA 94553
(925) 228-7376