David O'Neil Construction LLC

05/27/2026

04/21/2026

Our recent septic install & parking area ➡️ satisfied customer & ⭐️⭐️⭐️⭐️⭐️ review! If you or someone you know is looking for a knowledgeable, professional & reliable excavation crew for your next project, we are your company! And thank you Mark, it was a pleasure working with you!

04/20/2026

Big progress on this house lot project in Nelson, NH! 🚧

Our crew has been hard at work digging and prepping the site for the foundation—carefully excavating, grading, and setting the stage for concrete basement walls. Precision is everything at this stage, and we’re making sure the base is solid and ready for the next phase.

From raw land to a future home; it’s always great to see a project start taking shape.

Need site work or excavation for your next build? Reach out—we’d be glad to help get your project off to the right start.

04/15/2026

Aging sewer infrastructure is a common concern for many homeowners, especially those with older clay or Orangeburg piping. While these materials were once standard, they are now prone to cracking, root intrusion, and eventual collapse—leading to costly repairs and potential property damage.

Upgrading to SDR 35 piping provides a durable, long-lasting solution designed to improve flow efficiency and resist common issues associated with outdated systems. Investing in a replacement not only protects your home but also adds long-term value and peace of mind.

If you’re noticing slow drains, frequent backups, or suspect your sewer line may be failing, it’s important to act early.

David O’Neil Construction proudly services the entire Cheshire County and Peterborough areas.

Contact the office of David O’Neil Construction at 603-876-9000 to discuss needed repairs, or full replacement. Our team is here to help ensure your system is functioning efficiently.

04/13/2026

Another successful project in the books!

David O’Neil Construction recently completed the installation of a Presby Advanced Enviro-Septic system for a commercial customer in Swanzey, NH. Our team worked efficiently to ensure the system was installed to the highest standards, providing a reliable and environmentally friendly solution.

In addition to the septic installation, our crew extended the customer’s parking area and finished the gravel driveway, helping improve both functionality and accessibility for their property. We also replaced the old copper waterline with new CTS piping to help prevent future leaks and ensure long-term reliability.

Great work by our crew from start to finish—we’re proud to deliver quality results that our customers can depend on!

If you’re planning a project, big or small, reach out to see how we can help.

📞 603-876-9000

04/01/2026

‼️ HIRING- Equipment Operator

📞 603-876-9000

📧 [email protected]

📍423 Main Street - Marlborough, NH

03/31/2026

Another successful install in Richmond, NH

We recently completed a stone & pipe septic system, a time-tested and reliable solution for properties with the right layout and soil conditions. These systems use perforated pipe set in carefully placed septic stone to allow for proper drainage and long-term performance.

From excavation to final grading, our team focused on precision, durability, and providing a quality product for our customer.

Whether you’re building new or replacing an older system, we’re here to help guide you through the process from design to installation.

📍 Serving Cheshire County
📞 603-876-9000

03/25/2026

🚧 Sewer Line Problems? We’ve Got You Covered 🚧

If you're dealing with slow drains, sewage backups, or soggy spots in your yard, it could be a problem with your private sewer line. Don’t wait for a small issue to turn into a costly emergency!

At David O'Neil Construction, we specialize in professional sewer line repairs and full replacements.

✔️ Fast, reliable service
✔️ Experienced local crew
✔️ Honest assessments & transparent pricing
✔️ Professional installations everytime

Whether it’s a minor repair or a complete sewer line replacement, we’ll get your system flowing smoothly again with minimal disruption to your property.

📞 Call 603-876-9000

03/24/2026

Looking for an experienced operator who is productive with job time management and takes pride in a top quality final product. Please send resume to: [email protected] or call
603-876-9000.