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Typical Greater Boston range for this kind of work, from regional averages — not a quote from Seal Tech Masonry and Waterproofing, LLC. 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
Seal Tech Masonry and Waterproofing, LLC is a Quincy, MA outfit built around masonry and waterproofing repairs — retaining walls, foundations, drains, roof leaks and concrete steps — that has been operating for about two years. The pattern across Angi, HomeAdvisor, BBB and an independent review site is consistent and serious: reviewers describe hiring the company for a garage drain, a roof-leak repair and a concrete-stairs job, and in each case say the work fell short — a $1,900 drain installed as an unconnected grate that left the garage flooding worse than before, roof leaks that got worse after the repair alongside a replacement estimate more than double a competing quote, and stairs a reviewer says were installed against MA building code before the company demolished its own work mid-dispute. Several reviewers say the business stopped returning calls or emails afterward, and one found the listed office was a PO box at a FedEx store. BBB gives the company a C- for failing to respond to a complaint, and it is not BBB accredited. Not every account is negative: one reviewer credits a crew member named John with a well-communicated, tidy retaining-wall repair. A separate 5-star BuildZoom review praises a $48,000 roof replacement, but the reviewer states they received a kickback for it, which is worth weighing against how much that rating reflects independent customer opinion. Given the volume and consistency of the complaints — three separate customers describing similar patterns of unfinished or defective work followed by non-response — this is one to research carefully and get everything in writing before booking.
“We would never recommend this company or hire them again. We hired them to repair some roof leaks, and after their work the leaks were worse. We got an estimate from them for a new roof which was more than twice the price we were quoted by another more reputable and experienced company.”
“Their predatory and deceitful owner knocked on my door one morning and solicited my business by offering a competitive price to repair the front stairs.”
“We would never recommend this company or hire them again. We hired them to repair some roof leaks, and after their work the leaks were worse.”
“Rated 1/5 (2 Review)”
I really hope any potential customers read these reviews before hiring these scammers. I did not and it was a huge mistake. They scammed me out of $1,900 and ghosted me when I tried to contact them. They are NOT ANGI APPROVED and are on a list of businesses to avoid on the BETTER BUSINESS BUREAU website for 3 years. AVOID, AVOID, AVOID!
I was scammed out of $1,900 by SealTech Masonry and Waterproofing. They were hired to install a drain in front of my garage due to flooding from a sloping driveway. All they did was install a grate with no drain attached. My garage still floods worse than before. They do not respond to calls or emails. As you can see from the photo, water is still pouring into my garage instead of draining into the side yard as promised. I was charged $1,900 for a promise of a remedy which I did not get. Avoid these scammers!
We would never recommend this company or hire them again. We hired them to repair some roof leaks, and after their work the leaks were worse. We got an estimate from them for a new roof which was more than twice the price we were quoted by another more reputable and experienced company. Needless to say we went with the experienced company and are very happy we did. I talked with SealTech about a partial refund, and after saying they would get back to me, they simply stopped answering my calls or responding to my messages. I finally decided to go to their office only to discover the address was a post office box at a FedEx store. Stay far away from this company!
Roof replacement $48,000. Everything described in the estimate was carried out to perfection and the whole project came in under budget. I received a kickback at the end. Absolutely delighted with the work. Will definitely be using again in future. Great work guys.
This “company” should be avoided at all costs. Their predatory and deceitful owner knocked on my door one morning and solicited my business by offering a competitive price to repair the front stairs. I entered into a contract with them convinced that I would be in competent and honest hands- boy, was I wrong! None of the work (none!) was done according to the MA building code. The installed concrete risers were not spaced evenly and presented a huge safety hazard. I communicated my concerns and deep displeasure with the workers to finally be transferred to the owner, who apologized and blamed the worker’s incompetence. He initially accepted responsibility for this gross and negligent oversight, and assured me that he would rectify the situation. This was an outright lie. The owner returned to hastily demolish all the work he had done, and in the process caused further damage to the structural integrity of the staircase and demanded additional money to fix it. Dishonest!
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1 change recorded — last scanned Sep 17, 2026.
