Devengenzo & Company

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Devengenzo Landscaping & General Engineering, Inc.


P.O. Box 478, Lafayette, Ca  94549


About Devengenzo & Company

Devengenzo & Company is a diamond certified landscaping
and general engineering company servicing the San Francisco East Bay

DBA Devengenzo and Co.

General Contractor, General Engineering Contractor, Landscape Contractor

We have been serving Contra Costa County and Alameda County clients since 1970. We specialize in total project management from inception to completion and are experienced in all phases of residential construction.

General Contracting Division : New homes, additions, remodeling, kitchens and bathrooms are some examples of the work we are capable of doing.

We have in house staff that can handle your project from inception and initial planning, to the completed plans through the permit process.

General Engineering Division : Sewer main extensions, sewer laterals, storm drain systems, interceptor systems (french drains). We offer complete site drainage solutions, including septic system installation and abandonment.

Landscape and Irrigation Division : Specializing in custom projects, grading, automatic irrigation, hardscapes, and retaining walls and several award winning projects.

What we do?

Specializing in custom projects

View works

We are a construction company dedicated
to project management from inception to completion

We are motivated by the desire to achieve and complete our clients specific dream project or necessary goal.

A glimpse of work we’ve

done for our clients.


Tile Work

Pool Houses



Window Installations

Art Studios


Drainage Fixtures

Retaining Walls



Successful construction projects require
a good mix of combined skills

Construction Services

General Engineering Services

Drainage is the natural or artificial removal of surface and sub-surface water from a specific area.  Drainage is sometimes an over-looked necessity.  

Besides solving many problems,  Retaining Walls can be an accent to make the Garden or Backyard inviting and beautiful.  They can run straight lines, have curves, make stone seating, create terraces and many more functional possibilities.  We install: Soldier Coarse Walls (I beams and Lagging), Versa Lok & Keystone, Poured in place concrete Walls.

  • Main line extensions and repairs
  • Lateral line replacement and repairs
  • Lateral abandonment
  • Septic system abandonment

Improper drainage can lead to hillside repairs and erosion control.  Another reason to pay attention to the drainage system around your home.

Landscaping Services

Are you ready to get started?

Contact Us

Our Latest Posts

Updates for the ADU

So much as taken place on the building of this ADU since last September 2022.The location for this ADU is so unusual…

Updates on the Conventional Adu

There has been a tremendous amount of progress on this ADU since July.Please enjoy seeing this building coming together. The last three…

Bowling ADU updates

Update on the ADU being built. As per the previous post, the Foundation Wall for this ADU is Concrete “Shotcrete” and screeded…

New Updates – 6/1/2022

Updates on the ADU that is being built using the Conventional Construction Process. In the background photos you see the excavation has…

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It has been a year since I updated on the beautiful conventional ADU unit.
A lot has taken place in this peaceful rustic location.

This project had many challenges because of the private location and difficult access. 
Our subcontractors were amazing. The work they performed is outstanding.
We are nearing the end…but not there yet.  

Please view some new photos of the progress.

Contact Us

P.O. Box 478, Lafayette, CA 94549, United States

+925 930 7186

Send a Message

We bring a personal and effective approach to every project we work on.