PerimeterTileInterior drain, exterior dig or neither — decided by where the water is.

How much does basement waterproofing cost in South Boston, MA?

Interior basement waterproofing in South Boston, MA
$12,742
150 linear feet · typical range $8,494 – $18,688
Typical total$85 per linear feet$12,742
Range you should see in bidsthree bids on the same scope normally land inside this$8,494 – $18,688
Labor portion60% of the job — this is the part that moves by city$7,645
Material portion40% — bought at national prices$5,097
Cement Masons and Concrete Finishers pay near South Bostonabout $35/hr · Boston-Cambridge-Newton, MA-NH metro$73,320/yr
U.S. mean for the same tradeSOC 47-2051$60,050/yr
Versus the national pricetrade pay here runs +22.1% against the U.S. mean+$1,492
Short pour season85 freezing days a year in South Boston. ACI 306 cold-weather protection — blankets, heated water, or waiting — is a real line item here, not boilerplate—

Notes

  • Where the number comes from. The national price for interior basement waterproofing is $75 per linear feet — interior drain tile pricing published for 2026, $50–$110 per linear foot. Labor is about 60% of that. Cement Masons and Concrete Finishers near South Boston, MA average $73,320 a year against a U.S. mean of $60,050 — a factor of 1.221 — so the labor half is scaled by that and the material half is not. Source: BLS OEWS May 2025 for the Boston-Cambridge-Newton, MA-NH metro area, SOC 47-2051.
  • Why the city matters, not just the state. Trade pay moves inside a state as much as it does between states. Crews do not commute across a state to bid a job, and materials ship at national prices either way — so a metro wage is the honest input here and a state average quietly rounds four different cities into one number.
  • Short pour season. 85 freezing days a year in South Boston. ACI 306 cold-weather protection — blankets, heated water, or waiting — is a real line item here, not boilerplate.
  • What is in the price: breaking out the slab at the perimeter, the drain tile and gravel, a wall vapour barrier, re-pouring the concrete, a sump pit and pump.
  • What is not: a battery backup pump, exterior grading and downspout work, foundation crack injection, and finishing the basement afterwards. These are the lines that turn a $12,742 quote into a $15,927 invoice, so ask about each one before signing.
  • Use this as a bid check, not a quote. It prices an average job in average condition. Difficult access, the state of what is being replaced, the season, and a crew booked out three months all move the real number, and none of them are in a per-unit average.

interior basement waterproofing in South Boston, MA

$12,742 is the typical number, and three bids on the same scope normally land between $8,494 and $18,688.

That is $1,492 more than the same job priced at the national average.

Why the city changes the number

About 60% of this job is labor — $7,645 of the $12,742 above. Labor is the only part that moves locally; a bundle of material costs what it costs wherever it is nailed down.

Cement Masons and Concrete Finishers near South Boston average $73,320 a year, against a U.S. mean of $60,050. That is a factor of 1.221, so the labor half is scaled by it and the material half is not.

Source: BLS OEWS May 2025 for the Boston-Cambridge-Newton, MA-NH metro area, SOC 47-2051.

What the quote should include

Short pour season

The lines that turn a quote into an invoice

Ask about each of them before you sign. On a job this size they are the difference between $12,742 and something a quarter higher.

Use it as a bid check, not a quote

This prices an average job in average condition. Access, the state of what is being replaced, the season, and a crew booked out three months all move the real number, and none of them are in a national average.

If a bid lands outside $8,494 – $18,688, that is not automatically wrong — but it is the question worth asking out loud.

Nearby sizes

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