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Foundation Repair and Basement Waterproofing in Tyngsborough, MA
In Tyngsborough it's illegal to pipe a basement sump pump into the town sewer, and the Sewer Commission can smoke-test houses to find one. Call (978) 800-2819 or use the form. A person reads every request and replies with what happens next.
- Free for homeowners
- Town and state rules on this page
- Lake Mascuppic to the western hills
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Basements in Tyngsborough
What's going on in the basement?
Waterproofing & Drainage
Wet walls, seepage at the floor joint and spring water in the basement, handled with interior drains, exterior work or both.
Sump Pumps
New pits, replacement pumps and battery backups, with the discharge going somewhere your town allows.
Foundation Cracks & Repair
Leaking cracks, bowing or settling walls and failing mortar in old fieldstone, with an engineer brought in when the job is structural.
Crawl Spaces & Finishing
Damp crawl spaces sealed up, and dry basements turned into finished space with the right permits.
Not sure what it needs?
(978) 800-2819Tell us where the water shows up and when, and we'll help you sort out what kind of job it is.
Permits
Permits and rules for basement work in Tyngsborough
Tyngsborough's Building Department, at 25 Bryant Lane, enforces the state building, plumbing, gas and electrical codes. Homeowners and contractors can apply and pay online through ViewPoint Cloud or in person at Town Hall; the office stays open until 7 on Wednesdays and is closed on Fridays (Building Department).
- Building Department
- 25 Bryant Lane, 978-649-2300 x112
- Hours
- Mon–Tue 8:30–4:30, Wed 8:30–7, Thu 8:30–4, closed Fri
- Apply online
- ViewPoint Cloud, or in person at Town Hall
- Residential fee
- $100 minimum for work up to $5,000; $55 plus $13 per $1,000 above $5,000 (effective March 1, 2024)
- Work without a permit
- Double fee
- Permit life
- Expires 6 months from issue unless work is progressing
- Sump pumps
- Banned from the town sewer; penalties up to $5,000 per violation
Which basement jobs need a permit. The town's permit FAQ repeats the state rule that you can't construct, alter, repair or demolish a structure without a permit, and that an ordinary repair doesn't need one (Building FAQ). It says nothing about basements by name. Under the state code, work that substantially cuts away a wall or removes a beam or load-bearing support always needs a permit (780 CMR R105), and the state's guidance chart marks insulation, wallboard and structural carpentry as work that needs a building permit (state HIC chart). Whether an interior drain and sump counts as an ordinary repair is the building official's decision, so ask before work begins. Most Tyngsborough projects also need construction plans and a certified plot plan.
Finishing the space. A habitable basement room needs a ceiling at least 6 feet 8 inches high, Massachusetts requires photoelectric smoke alarms and a carbon monoxide alarm on every story including the basement, and where a single- or double-hung window serves as an escape opening the state's amendment sets a 3.3 square foot net clear opening (780 CMR chapter 3).
Who can do the work. Repair and improvement work on an owner-occupied home of one to four units generally needs a contractor registered as a Home Improvement Contractor; you can look one up on the state's Contractor Hub. On one- and two-family homes, a licensed construction supervisor or a registered design professional has to oversee the construction (construction supervisor rules). Jobs over $1,000 need a written contract, and the deposit can't exceed one-third of the price unless special-order materials cost more (M.G.L. c.142A §2). The state code doesn't name foundation repair as engineer-only work, but the building official can ask for more construction documents, and in a flood hazard area they must be sealed by a registered design professional (R107.1 and R322.1). Exterior waterproofing is excavation, so Dig Safe has to be notified at least 72 hours ahead, not counting weekends and holidays (M.G.L. c.82 §40A).
Last verified November 2026. Fees, restrictions and deadlines on this page are due for re-checking by November 2027. New England Basement Pros is a referral service. We don't pull permits or do basement work; the contractor files the permit.
Water
Where the water comes from in Tyngsborough
The sewer is off limits. Tyngsborough's sewage flows through Chelmsford to the Lowell Regional Wastewater Utility at Duck Island, which the town says has capacity limitations, and an EPA-administered grant of $480,000 pays for removing infiltration and inflow upstream of the Chelmsford connection (Sewer Capacity Project). That's why a sump pump tied into the sewer is treated as a violation, and the town notes illegal discharges could also push up sewer user fees (Sewer Department).
The legal route is outdoors. The Stormwater Bylaw allows sump pump discharge and exterior and footing drains as non-stormwater discharges if they aren't a significant pollutant source, excludes active dewatering, and bans illicit connections even if they were permitted in the past (Stormwater Bylaw). Ask the town before you send water toward a street drain.
Septic and wells. The 2018–2020 Open Space and Recreation Plan puts about a quarter of the town on sewer and three-quarters on Title 5 septic systems, with about 70% of homes on private wells; sewer is being extended in phases (Open Space and Recreation Plan). The Board of Health's septic regulations, effective July 8, 2019, keep every system component 100 feet from wetlands, watercourses and great ponds (septic regulations), so where your sump water lands matters on a septic lot too.
Two kinds of ground. The same plan describes stony, sandy Hollis-Canton-Scituate soils over about half the town in the western and northeastern hills, where surface bedrock is very evident in the west, and Hinckley-Windsor-Deerfield sands along the Merrimack and the waterways. Ledge and sand move water very differently, which is worth raising with any contractor who looks at the house.
Merrimack River
The river runs more than five miles through town, and its banks are in the 100-year flood area. Route 113 near Vesper Country Club floods when the Merrimack reaches flood stage.
The lakes
The shorelines of Lake Mascuppic, Althea Lake, Long Pond, Flint Pond and Massapoag Pond are 100-year flood areas in the open space plan.
Lawrence and Bridge Meadow Brooks
Both brooks are listed among the town's 100-year flood areas.
The town's Flood Plain overlay district takes in every Zone A and AE area on FEMA's county map, according to the 2021 Master Plan (Master Plan). Look up your own address on FEMA's Flood Map Service Center. Flood insurance covers a basement's furnace, water heater, sump pump and foundation, but not finished walls, floors or most belongings (FEMA).
Digging near the water. Tyngsborough's local wetland regulations, revised February 22, 2022, allow no disturbance of land within 30 feet of a resource area and no new structures, retaining walls or impervious surfaces within 50 feet; underground utilities are a listed exception (wetland regulations). The bylaw reaches ponds of any size and vernal pools, and counts filling or removing material that changes the ground's elevation as a regulated activity (Wetlands Protection Bylaw). An exterior drain or regrading job on a lakefront lot should start with the Conservation Department.
Tyngsborough's homes
Owner-occupied houses, many of them by the water
Tyngsborough had 4,622 year-round homes in the 2020 Census, about 84% of them owner-occupied, and 3,234 of its 4,146 parcels hold single-family houses (Housing Production Plan, April 2025). Around 1900 the town was a popular resort and recreation area: by 1905, the Master Plan says, its summer population was double its year-round one (Master Plan).
There is no local historic district yet; the 2021 Master Plan proposes one for the Town Center. The Master Plan names the Old Town Hall, the First Parish Meeting House and the Winslow School among the Town Center buildings it wants to reuse (Master Plan).
Radon
Radon in a Middlesex County basement
We found no town-level radon figures for Tyngsborough. Massachusetts requires a passive radon mitigation system in new one- and two-family homes in Middlesex, Essex and Worcester counties, which the state describes as generally considered by the EPA to have the highest radon potential, and it publishes test results by town on its residential radon tracking page. The state health department says to test at the lowest livable level of the home between November 1 and March 31, strongly recommends mitigation at 4.0 pCi/L, and says it should be considered between 2.0 and 4.0 (testing your home for radon; state guidance checked November 2026). If you're finishing the basement, test first.
FAQ
Tyngsborough basement questions
Can my sump pump drain into the sewer in Tyngsborough?
No. The Sewer Department says discharging a basement sump pump into the town sewer is illegal. The Sewer Commission may run smoke tests and house inspections and can assess penalties of up to $5,000 per violation.
Where can sump pump water go instead?
The town's Stormwater Bylaw lists uncontaminated groundwater from a sump pump and exterior and footing drains among the non-stormwater discharges it allows, as long as they aren't a significant source of pollutants; active dewatering is excluded. Confirm the outlet with the town before the work starts.
My house is near a pond. Does that change exterior waterproofing?
Usually. Tyngsborough's wetland regulations allow no land disturbance within 30 feet of a resource area, and no new structures, retaining walls or impervious surfaces within 50 feet. Its bylaw covers ponds of any size, so digging or regrading near the water goes to the Conservation Commission first.
What does a building permit cost in Tyngsborough?
Under the fee schedule effective March 1, 2024, a residential permit is $100 for work costing up to $5,000; above that the schedule lists $55 plus $13 per $1,000 above $5,000. Work started without a permit pays double.
What does it cost me to use New England Basement Pros?
Nothing. Asking is free for homeowners; the contractor prices the job, and the price and contract are between you and them.
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