Verified record
Typical Greater Boston range for this kind of work, from regional averages — not a quote from Supreme Waterproofing. Use it to sanity-check bids, then get the real number in writing.
Not sure which you need? Start with an inspection — many reputable companies assess free, and independent assessments run up to $500.
The wall run getting the drain — a full 30×40 ft basement is about 140 ft.
Estimated range
$7,600 – $15,000
Typical waterproofing project around $11,300
Supreme Waterproofing is a Holden-based basement waterproofing and foundation-moisture contractor founded in 2014 by Nicholas Stewart, who says he spent a decade working up from laborer to foreman in the trade before starting the company. Nearly every review names him personally — Nick — as the one who shows up to quote, explain, and often do the physical work himself. Its 14 reviews on Google run from 2021 through this year, all five stars, and several describe specific, hands-on jobs rather than generic praise. In a 2023 review, a homeowner on a hillside lot described Nick and his crew hand-digging roughly 20 feet of basement wall down to the footer — there was no equipment access on the property — sealing it with hydraulic cement and hauling the debris out in buckets. Another, from a first-time homeowner in a 2025 review, described Nick arriving the same day water showed up in a brand-new basement and patiently walking them through a French drain and sump pump plan they knew nothing about going in. A Reddit thread this summer had a Worcester-area commenter vouching for Supreme directly, calling Nick "a really nice guy." Its Massachusetts home improvement contractor registration is active. The company's own site also states it is BBB accredited, though that claim wasn't independently verified here. Its stated service area is Holden and Worcester, though the site also claims broader New England coverage — worth confirming for a specific address. For a wet basement or foundation moisture problem in the Worcester area, this is a small, owner-led operation with a deep, consistently positive multi-year record — the kind of shop where the person who does the estimate is also the one on the job.
“Supreme waterproof is a customer of mine, really nice guy.”
“Nick did an excellent job of moisture sealing the basement in our new home. He was extremely professional at every step of the process... I can not recommend him more enthusiastically! - Kristin Crane”
“My fiance and I had water in the basement the very first week after buying our first home. Nick came the same day and was able to throughly explain his waterproofing approach.”
Nick and his team are the best! I’m a real estate investor and have used them on several projects now. They offer great prices and excellent service. I highly recommend them!
Very professional team and a great job putting a French drain in our basement.
We have an 1895 house with a fieldstone foundation. Every year after the spring rains water comes up through the rat slab. Over the years I’ve patched the walls, but the floor remains a problem. We began looking for an interior French drain a couple years ago. The first contractor ghosted us. The second would install the drain, but only if we let him encapsulate the walls as well with plastic sheeting, which we thought would just trap moisture and mold. The third, a national franchise, would do the job with their proprietary system, but wanted $24,000 (with a 5% discount if we decided that day- the house isn’t that big!) We reached out to Nicholas at Supreme Waterproofing. He came over later that week for an estimate, even though we were 50 miles from his home base. He itemized exactly what he was going to do and how much it would cost- about half what the national franchise wanted.. We liked the idea that he was the owner. He and his crew Justin showed up on time and worked straight for three days. They cleaned up inside and outside- no mess. The basement looks great. Did it work? We won’t know till next spring, but he guaranteed his work. We would clearly use him again.
Nick did an excellent job of moisture sealing the basement in our new home. He was extremely professional at every step of the process, from getting a quote to completing the job. He answered all of our questions thoroughly and was easy to communicate with at every stage. Our basement looks brand new! His work is meticulous, with excellent workmanship. I can not recommend him more enthusiastically!
Nick responded to my call and came out to my property same day. He answered all of my (many) questions with patience and expertise, and gave me an honest opinion that I should wait before taking action. He didn't charge me for the inspection and left me feeling relieved and informed. In the future when we do some work on our basement, I will definitely be contacting him. Honest, professional, knowledgeable. Thank you!
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Certified attributes are verified against the public registry. Others are the business's own statement.
Established 4.5 rating
Solves what others couldn't5.0
Fast emergency response4.8
Fair pricing3.7
Historic-home work4.6