Based in Northern San Francisco Bay Area, Nunley Engineering primarily serves Sonoma, Napa, and Marin Counties. Nunley Engineering is a family owned general engineering firm that focuses on quality over quantity; maintaining high grade relationships for many years, Nunley Engineering is the premier firm within this region.


  • Site Grading

  • Preparation for Utilities

  • Preparation for Erosion Control

  • Material Removal

  • Site Compaction

We run underground utilities pre-construction and post-construction. Whether you’re looking for someone to run utilities before you build or on an existing structure, we’re the company to call. These can include:

  • Water Lines

  • Drainage

  • Electrical

  • Data Cables

  • and more 

From simple erosion control like mulch, to unique landscaping – Nunley Engineering has talented and experienced crews to create functional and aesthetically pleasing landscapes.

  • Sod and seeded turf

  • Native plantings

  • Retaining walls (see unique features)

  • Drainage control

  • Storm drains and reservoirs

We install:

  • Small and large residential

  • Small and large commercial

  • Standard gravity systems

  • Pressure distribution systems

  • Advanced treatment systems

  • and more

We pride ourselves on being able to offer a very diverse set of services, staying in front of the industry in many areas, our skilled crews often install many unique features to our projects: 

  • Various rock walls

  • Unique artisan pathways

  • Large storm drain/storage systems

  • almost any unique feature your job may have

Experience and Reliability

We’ve been family owned and operated for more than 20 years, hiring only the most skilled and competent workers to join our close-knit crews.

We focus on creating fruitful and on-going relationships with all of our sub-contractors, general contractors, and commercial and residential clients.

Innovation for the North Bay

As residents of the North Bay, we understand the issues facing our communities; which is why we make an on-going effort to optimize efficiency and use environmentally friendly construction methods. We are constantly seeking out innovative and green technologies to reduce any negative impact upon this area’s diverse eco-systems.



Owner/Operator Mike Nunley has the benefit of working with both of his sons as Nunley Engineering continues to grow and expand. With a quality score of 100, Nunley Engineering is in the top 10% of 336,931 contractors in California – View Nunley Engineering’s BuildZoom profile here:


Our bidders and planners work full-time to insure that our crews are functioning as efficiently and cost effective as possible.

Mitch Nunley


We have been fully licensed through the California State License Board for 17 years, and have been bonded and insured the whole time. More information is available through the California State License Board:



We are constantly working to better our community, here are some organizations that we support.

Nunley Engineering - Serve A Little
Nunley Engineering Sonoma County 4H


Nunley Engineering runs “Dryscape Materials”, a landscape materials yard, specializing in drought tolerant and low maintenance supplies.


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    “We had a large residential project with a lot of challenges: extensive grading in very rocky soil, subsurface water, heritage oak trees that had to be preserved, just to name a few.  But the crew at Nunley Engineering did an amazing job with everything.  They were professional, responsive, and very detail oriented.  Great crews, great boss, great company.”
    Lisa Stahr
    “I have worked with Nunley Engineering since their inception.  They are one of my key sub-contractors on which I rely.  They are honest and true to their word.  I would have no problem recommending them to anyone”
    Howard L Hunt Construction