W. A. Anderson Group

The North Bay’s top-rated general engineering contracting service. Specializing in residential and commercial site development.

cement mixer

Foundations & Pad Preparation

We construct pads to geotechnical design criteria. Learn More

pencil and ruler

Underground Utilities

We provide all underground wet utilities for site development. Learn More.

pencil and ruler

Rock Breaking & Crushing

Hard rock removals with the latest state of the art equipment. Learn More

pencil and ruler

Design & Build

Many projects are designed on a budget to get permits and get building. Learn More


Hillside Specialists & Slide Repair

With over 40 years in hillside excavating and engineering we have done it all. Learn More


Boutique Winery and Brewery Construction

We have done numerous winery and even brewery projects over the years. Learn More

Eco Friendly Construction

We follow all guidelines provided by the state of California for the disposal of unrecyclable materials. W. A. Anderson Group recycles 85% of disposed of items to proper sites or recycle at our own facility.

Our fleet of equipment and vehicles is 100% Tier 4 California CARB compliant environment friendly.

Unbeatable Construction Management

The owner personally manages all facets of the day-to-day operations. William Anderson makes daily schedules, checks on each job, and discusses objectives with clients and our foreman for each shift. Every effort is made to meet or beat client expectations of progress.

construction worker icon

No Project Too Big Or Too Small

As a comprehensive, full-service site development company, we routinely handle projects that vary considerably in size and complexity.  Although we are not a large company, we have the vast experience and technical savvy needed to be highly cost-efficient, and our overhead is much lower in comparison to “the big boys.” Most of all, it’s our talented crews that make it all happen. They are the heart of our company and your guarantee that you will get top-priority treatment whether you’re building a summer home or a complex regional commerce center. W.A. Anderson Group is the answer to all your site development needs.

Free Consultations

excavator icon

We’ve Been Building For Over 40 years

Turn to us with confidence. No other contractor comes close to our elite team of seasoned professionals. We’ve got the right stuff and we’ll prove it to you.


View All


Blue Stone Pools

Brascia Builders

B.R. Cohn Winery

Bruce Tucker Construction

Cap Bridge Partnership

Cello & Maudru Construction

City of Sonoma

D’Ambrosio Vineyards

Dale James Construction

DeNova Homes, Inc.

Desmond & Wallace Construction

Donalie Acres

Gloria Ferrer Winery

Hanford ARC

JS Design & Build

La Prenda

Lenox Homes

Midstate Construction

NorCal Development

Plaza West

Ridge Design & Build

Salvation Army

Sonoma Raceway

TriCorp Construction

Wright Contracting

Contact Us

P.O. Box 126, Vineburg, CA 95487

(707) 210-4189