Local business · Waltham, MALocal business · 136 Lowell St, Waltham, MA 02453
Verified record
Typical Greater Boston range for this kind of work, from regional averages — not a quote from Slater Company LLC.. Use it to sanity-check bids, then get the real number in writing.
Estimated range
$4,000 – $11,000
Typical exterior project around $7,500
Slater Company is a Waltham general contractor built around roofs and exteriors. Its Massachusetts home improvement contractor registration, #190186, is active on the state registry, held by Slater T Panosian, and the Better Business Bureau describes the business as a roofing-focused general contractor. The menu runs wider than the roof. Houzz lists siding and window replacement, exterior doors and concrete work alongside kitchen, bathroom and basement remodeling, tile and countertop installation, and project management. BBB also lists a construction supervisor number, CS-111844, which Houzz shows as 111844 — the personal licence that usually sits beside a company's registration. One thing to raise before you sign: the Better Business Bureau grades this company F. Put that to them directly, ask what it stems from, and ask for addresses of two or three recent jobs of the same kind as yours that you can go look at. For a Waltham-area roof, siding or window job, the state registration is in order and the licence numbers are easy to check. Get the scope, the materials and the payment schedule in writing, confirm current liability and workers' compensation insurance, and get a straight answer on the BBB grade before any money changes hands.
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1 change recorded — last scanned Sep 19, 2026.
Renovates century-old structures5.0
Sticks to the estimate4.5
Pool leak two contractors could not find4.5
Multi-trade condo work4.1
Reached a roofing emergency within the hour3.8
Basement flood repair completed while owners traveled3.0