O'Neil Construction
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O'Neil Construction
David O'Neil Construction, LLC is a small, growing excavation company serving Southern New Hampshire and the Monadnock Region. We are your one stop shop for all your excavation and site work needs. With over 20 years in the industry we know how to complete your project in a safe, professional, cost effective and timely manner.

We are a hard working, dedicated team that takes pride in providing top quality service to our customers. With Your Project & Our Capability we will provide our customers with safe, high quality construction services for all their residential and commercial excavation needs. David O'Neil Construction, LLC is a fully licensed and insured excavation company serving the south western region of New Hampshire.
Services
We enjoy getting to know our customers, so that the final outcome is exactly what they wanted from the beginning. Along with a house, you are purchasing a properly working septic system or private sewer line. Without a video inspection how is a buyer to know the quality and integrity of the septic system and leach field they are purchasing?
Most homeowners don't understand the process of properly designing, installing as well as the care & maintenance of a septic system to ensure that it lasts it's full life span. That is what David O'Neil Construction, LLC is here for.

We use local soil scientists during the design of a new septic system, are here to properly explain the installation process before and during the install and provide knowledgeable information for proper care & maintenance after the install is complete.
Matthew started working for David O'Neil Construction, LLC during summer breaks throughout high school and college. He was hired as a full time employee in 2008 after graduating from the Thompson School at the University of New Hampshire with a degree in Civil Technology & Construction Management. College is where he learned new techniques of the trade, which have become a huge asset to the companies flow, function & organization.
Janelle graduated from Plymouth State University in 2011 with a Bachelors degree in Childhood Studies. After college she worked as a Residential Mortgage Loan Processor. Her background in banking has been a huge asset to the company; whether it be understanding the importance of a customer having a proper septic inspection report or providing a great customer service experience-she's the right person for the job.
David & Matthew, Thank you for your expertise & assistance with our septic inspection. We were disappointed to learn that the sellers of our home did not get their act together in time to use you for the system replacement. We would have preferred for you to do that work. I'll probably check in with you at some point to review the alarm and frequency of pumping the tank.
Reviews (6)
Brad Grinstead
Brad Grinstead
Jun 16, 2018
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They are almost too good to be true. Honest, fair, and dependable. Don’t waste your time (and money) on other contractors for your septic/leach field needs, or for all of the other services they provide.
Priscilla Leed
Priscilla Leed
Nov 27, 2017
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David and his crew were very helpful in updating our forty+ year old system. Our need was urgent and they got a new system installed quickly. We expect it to last a long time. Thanks for a job well done!
Donna Sprague
Donna Sprague
Nov 19, 2017
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Two years ago, the septic system at my lakeside home desperately needed to be modernized. David came to evaluate conditions, called in an engineer to design the proper system, and followed up with all required permits and inspections throughout the process. He and his son performed all the site work, including removal of a paved driveway which had delivered excess rainwater and snow melt-off into my basement for years (that project uncovered an additional ancient septic tank!) Matt recommended recycled asphalt for the new driveway surface, which is permeable and friendlier to the environment near
Russell White
Russell White
Aug 19, 2017
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With a dead line for sale of our house, it became painfully clear the septic system would not hold up. O'Neil not only put a rush on the job for us, but also did a very professional job at a competitive price.
Janelle Hodgman
Janelle Hodgman
Jun 14, 2017
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From a customer we met at the Home Show last year who needed work on their driveway.
"Pat and I would rate O'Neil Construction 10 on a scale of 1-10 with 10 being excellent. We had our driveway regraded with more drainage along the sides and pipes placed under the driveway where water could be diverted. A good base of gravel was put down with a top layer of SurePac on top . The estimate was well detailed listing exactly what would be done. The estimate was discussed with Pat and I and explained well answering all of our questions. They were prompt in the estimate and when they came to do the job
Maria Coviello
Maria Coviello
Jun 14, 2017
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We used David O'Neil Construction for several projects and were very pleased with the professional way he did each project, priced fairly and done in a timely fashion. One of the projects that we cannot thank him enough for is his consultation and working on stopping water from coming in our property. He installed the perfect drainage to keep the property from water seeping in from every rainstorm.
Maria Coviello
Harisville Inn