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Fieldstone Foundations & Masonry Corp is a Boston, Massachusetts foundation, masonry and waterproofing contractor at 201 Washington Street, owned by Steven Stewart. The company also offers chimney and fireplace work, and markets itself in the Greater Boston area as well as toward Nashua, NH. Customers who hired the business consistently describe real foundation work done well: one reviewer says the company repaired a leaking, cracking foundation and basement; another, a longtime customer, had the business waterproof both their own basement and their father's. A third review on a different platform describes a similar fieldstone foundation and basement repair that also resolved a pest entry point. Worth asking about before booking: BuildZoom lists the company's Massachusetts mason license (#212642) as expired/inactive, and its Houzz business listing currently shows as suspended. Sources also disagree on how long the company has been in business -- anywhere from about 20 to 30 years depending on the platform.
Typical Greater Boston range for this kind of work, from regional averages — not a quote from Fieldstone Foundations & Masonry. 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
One of the best contractors I have ever worked with Karl is amazing and honest to deal with repaired all my fieldstone foundation basement from leaking and letting in pests highly recommend his crew
Have known this business for quite some while. They have done repairs on my foundation and on my dad's they waterproof my basement, very polite and professional company.
I hired this company to repair my foundation which was leaking into my basement and was also cracking, the work they carried out was amazing and I highly recommend the team!
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2 changes recorded — last scanned Sep 14, 2026.
Basement waterproofing5.0
Retaining walls5.0
Bulkhead replacement4.8
Brick and 1850s fieldstone foundations repointed4.8
Structural carpentry4.8
Owner-led communication4.8