One of 1 septic company listed in our Marlborough directory. Listing compiled by SepticTankHub from public data — not affiliated with or operated by this business.
Septic Pumping & CleaningSeptic InstallationSeptic InspectionDrain Field Repair
⭐
5.0/5
16 Reviews
Free estimate · No obligation · 24/7
Get connected with an available septic pro in Marlborough
We'll match you with a licensed septic pro serving Marlborough — including this company and others in our directory — for a free quote.
Takes you to our Marlborough page to call an available pro now
🏢
ABOUT
About this listing
David O'Neil Construction is an excavation and septic system specialist operating in Marlborough, New Hampshire. The company provides septic system and private sewer line installations, inspections, and video camera services for homebuyers to assess system conditions before purchase. Their excavation services include designing and installing new septic systems, creating new driveways with hard pack or asphalt grindings, developing new house lots from clearing through final grading, installing un
🕐 Operating Hours
Monday: 8AM-5PM
📍423 Main St, Marlborough, NH 03455 · Listed in the SepticTankHub Marlborough directory.
💡Ratings are sourced from Google Business Profile and verified during our data collection process.
🔧
WHAT WE DO
Services Offered
💧
Septic Pumping & Cleaning
Routine pumping and thorough cleaning to maintain your system and prevent backups.
🏗️
Septic Installation
Full installation of new septic systems for residential and commercial properties.
🔍
Septic Inspection
Comprehensive system inspections for home buyers and real estate transactions.
🌿
Drain Field Repair
Restoration or full replacement of clogged, saturated, or failing drain fields.
🧮
COST TOOL
Pumping Cost Estimator
Enter your tank size to get an estimated pumping cost for the Marlborough area.
💰
PRICING
Estimated Pricing
Service
Range
Average
Septic Pumping
$300–$600
$425
Septic Inspection
$150–$350
$235
Septic Repair
$500–$2,500
$1,200
Drain Field Repair
$2,000–$8,000
$4,500
Grease Trap Cleaning
$200–$500
$325
Prices are estimates for the Marlborough area. Contact for an exact quote.
📸
GALLERY
Photos
❓
FAQ
Frequently Asked Questions
Septic pumping in Marlborough typically costs between $300 and $600, depending on tank size, accessibility, and how long since the last pump. David O'Neil Construction can provide an exact quote for your specific situation.
For most homes in Marlborough, septic tanks should be pumped every 3–5 years. Factors like household size, tank capacity, and water usage can shorten or extend this interval. David O'Neil Construction can inspect your system and recommend a personalized schedule.
A professional septic inspection typically involves locating and opening the tank, checking the inlet and outlet baffles, measuring sludge and scum layers, and inspecting the distribution box and drain field. The inspector will provide a written report and recommendations. David O'Neil Construction can walk you through the process.
Common signs include slow drains throughout the house, gurgling sounds in pipes, sewage odors indoors or outdoors, wet or unusually green patches over the drain field, and sewage backup in toilets or drains. If you notice any of these, contact David O'Neil Construction promptly.
Signs of drain field failure include soggy or spongy ground over the leach field, lush green grass directly above the field (especially after dry weather), sewage odors near the drain field, and slow drains or backups in the house. Early intervention can prevent costly full replacement.