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Find Septic system installers and replacers in Wilmington

Avatar for Schofield Environmental
Schofield Environmental
4.2(
9
)

Serving Wilmington, MA and surrounding areas

Approved

In business since 1999

Free estimates

Credit card accepted

At Alpha Environmental, we are very well versed in all available septic solutions for your project. We design and install the best septic systems to the highest standards. Whether we are repairing your current septic system or installing a new one, one thing is certain; nobody brings a higher level of professionalism into your home. We value quality and guarantee a pleasurable customer service experience. We look forward to serving you. Give us a call for a free estimate today!

Response time3 hrs
Response rate100%
1 neighbors recently requested a quote
Avatar for W Callahan Excavation
W Callahan Excavation
4.8(
49
)

Serving Wilmington, MA and surrounding areas

In business since 2005

Free estimates

Emergency services offered

"Bill and his crew had been digging up the road a few feet from my front door for a couple of weeks in order to replace my neighbor's septic system with city sewerage. Knowing of Malden's lead-copper regulations, he offered to replace my lead water line while he was working in this area. In spite of the incorrect piping plans supplied by the city's Engineering Department, Bill was able to locate the shut-off for my service (which was buried under several layers of asphalt), do the excavation, and replace my lead pipe with copper. I hired him without getting a second estimate because I was impressed by the work he was doing for my neighbor, because a different neighbor told me his price sounded reasonable, and because the staff at the Engineering Department said that he was a "good guy" and in fact did some work for the city. I gave him a "B" rating on Price because he never mentioned/offered his 10% Senior Discount to this 75-year old lady."
Recommended by95%of homeowners
Avatar for S&G Excavating
S&G Excavating
5.0(
6
)

Serving Wilmington, MA and surrounding areas

In business since 2020

Free estimates

"I have never experienced a more professional company than this one. These guys are top tier when it comes to septic repair. They walked me through everything that they were gonna do before they did it, so I wasnâ t confused what was happening. There pricing compared to other companyâ s is unbeatable. I would definitely hire these guys again in the future!"
Distribution Box Repair
Distribution Box Repair
Distribution Box Repair
Distribution Box Repair
Distribution Box Repair

+9

Recommended by100%of homeowners
Avatar for Provost Plumbing
Provost Plumbing
4.6(
155
)

Serving Wilmington, MA and surrounding areas

In business since 1960

Free estimates

Emergency services offered

"I tried to clear both of these myself, unsuccessfully. Clearing one sink was complicated by some old and delicate piping that we didn't want to damage. He stuck with it, was very careful, and managed to clear both without needing to open walls or cut and replace pipe. Hurray!"
Recommended by90%of homeowners
Avatar for Choice Home Warranty
Choice Home Warranty
4.0(
5,676
)

Serving Wilmington, MA and surrounding areas

In business since 2008

Emergency services offered

Credit card accepted

"So far when Choice Home Warranty is needed they are right trying all there mite to complete what need that I have. I call about my heating system today and they started right then trying to locate a technician to repair or as they say replace. I just know it's very cold and we need the heat very much there is small children in the home. I believe the CHW will do what they say they'll do and more."
Recommended by82%of homeowners
Avatar for Primos LLC
Primos LLC
5.0(
8
)

Serving Wilmington, MA and surrounding areas

In business since 2010

Free estimates

Emergency services offered

Primos offers Commercial/Residential Concrete patios/driveways/stamped and decorative, Asphalt Paving/Sealcoating, Paver Patios and Retaining Walls. We also offer excavating and drainage, plus sewer line replacements. \nWe will offer the best price with fast, reliable, and professional service. Our customers are our number 1 priority. We listen to exactly what you looking for and we will make sure you are happy before we leave.\n

Recommended by100%of homeowners
Avatar for American Home Shield – Home Warranty
American Home Shield – Home Warranty
3.5(
5,688
)

Serving Wilmington, MA and surrounding areas

In business since 1971

Credit card accepted

"AHS is ok. They cover repairs of most everything under the roof of your house. The companies that contract with them are not always the best. You call AHS with the issue, they send a fax to the repair company and give you the contact info. If they don't contact you within 24 hours, you call them. Sometimes they answer, sometimes they don't. When they arrive (usually three days or so later), they service the item. if it has issues within the 90 days, you call AHS again, they are sent out with no charge. If the serviceman decides the unit is unrepairable, AHS will allow you to choose a replacement from their listing (usually not as good as what you have) they will install and remove your old item, or give you wholesale amount to buy and install your own. Prices vary on what you want covered and what you want the copay to be, plus where you live. For me it is 49.99 per month with a 75.00 time of service order. You can have more than one item serviced at the same time under the same fee. If you have a SEAR product the repair guys are great. Not that wild about the other ones they send out. But it is a big savings compared to calling someone on your own. The cost of service is only the 75.00 copay."
Additional Photos
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+2

Recommended by65%of homeowners
Showing 1-10 of 40
FAQs for septic system installation and replacement projects in Wilmington, MA

The smallest standard septic system uses a 500-gallon tank, which costs between $875 and $1,150 installed. This size works well for single-occupant dwellings with minimal wastewater production. However, many local regulations specify minimum tank sizes, so check with your building department before committing to this compact option. Some jurisdictions require at least 750 gallons regardless of home size to ensure adequate waste processing capacity.

The installation timeline varies based on site conditions, permit processing, and contractor schedules. The process includes obtaining permits, conducting soil tests, excavation, tank placement, leach field construction, and final connections. Weather conditions, soil challenges, and inspection scheduling can all affect the overall timeline. It's wise to begin planning well in advance of when you need the system operational.

The most economical approach is to install a conventional anaerobic system with a plastic tank. To minimize costs while maintaining legality, obtain multiple quotes from licensed installers, consider scheduling during their slower seasons, and handle basic site preparation yourself. Never skip permits or required testing to save money—illegal installations can result in significant fines and mandatory removal, ultimately costing far more than doing it right initially.

Regular pumping helps prevent system failures and extends operational life. Most small systems require pumping every three to five years, though frequency depends on household size and usage patterns. Pumping services cost between $290 and $530, making this maintenance expense relatively minor compared to potential repair costs ranging from $500 to $2,600 for neglected systems. Establishing a regular maintenance schedule based on your installer's recommendations helps avoid costly emergency services.

The Wilmington, MA homeowners’ guide to septic system installations and replacements

From average costs to expert advice, get all the answers you need to get your job done.