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Septic Services · Holliston, MA

Septic Services in Holliston, Massachusetts

Compare contractors serving Holliston, Middlesex County — call them directly, or send one request and let the ones who want the job come to you.

30 contractors serving Holliston — including 4 based in town.

Contractors serving Holliston

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Septic Services in Holliston — what to know

Rebates & incentives

Mass Save does not cover septic. It funds heating, cooling, water heating, and weatherization, not sewage disposal, so any energy-rebate pitch for a septic job is misapplied. Holliston's Eversource electric service is an electricity matter and has no bearing on septic eligibility.

The real money is the Massachusetts Title 5 tax credit on MA DOR Schedule SC, which offsets part of upgrading a failed system to comply with Title 5, up to roughly $18,000 spread across years and subject to annual caps per the DOR. For Holliston's many unsewered lots, MassDEP Community Septic Management betterment loans, low-interest Title 5 repair loans repaid through the property tax bill, are worth asking the Board of Health about, since a full replacement runs into five figures.

Permits in Holliston

Septic in Holliston runs through Title 5 (310 CMR 15.00). The Holliston Board of Health issues the disposal works permit, and a registered sanitarian or professional engineer stamps the design after a witnessed perc and soil test. On lots with ledge or high seasonal groundwater, a raised or mounded design may be required, which the Board reviews more closely. Work near the Charles River headwaters, ponds, or wetlands draws Conservation Commission review under the Wetlands Protection Act. A Title 5 inspection is required before most property transfers on the unsewered side of town.

Typical project cost

Septic costs in Holliston run toward the higher end of MetroWest pricing because of Boston-metro labor demand. A conventional system replacement typically runs roughly $20,000–$35,000, climbing when ledge or a high water table forces a mounded design with imported fill and a pump. A Title 5 inspection runs a few hundred dollars up to about $1,000, and tank pumping a few hundred. Soil, ledge, and wetland setbacks near the Charles headwaters are the main local cost drivers.

About Holliston homes

Holliston is a Middlesex County town of about 14,902 residents across roughly 5,697 housing units, with a median home age near 60 years. A MetroWest town between Milford and Framingham, Holliston has only limited municipal sewer, so the bulk of its neighborhoods, from the village center out to the wooded subdivisions, run on private septic.

That reliance shapes the work here. Many 1960s and 1970s systems are aging out, and pre-1995 designs commonly fall short of Title 5 at sale. Holliston sits near the Charles River headwaters with glacial-till soil, pockets of ledge, and wetlands around its ponds and brooks, so perc results and groundwater drive system design across much of the town.

Common questions — Septic Services in Holliston

Is my Holliston home on septic?
Quite likely. Holliston has only limited municipal sewer, so most of its roughly 5,697 housing units run on private septic. The Board of Health can confirm whether your address is on septic or sewer.
Do I need a Title 5 inspection to sell my Holliston house?
Yes, if the home is on private septic. Massachusetts Title 5 requires a passing inspection before most transfers, and because much of Holliston is unsewered, this applies to a large share of sales in town.
Why might my Holliston lot need a mounded septic system?
Ledge and high seasonal groundwater in Holliston's glacial-till soil can leave too little separation for a standard gravity leach field, so a sanitarian may design a raised or mounded system with imported fill, which adds cost.
What does a septic replacement cost in Holliston?
A conventional replacement typically runs roughly $20,000–$35,000, higher when soil or ledge forces a mounded design. The Massachusetts Title 5 tax credit on DOR Schedule SC can offset part of the upgrade, and MassDEP betterment loans can spread it across years.

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