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River Road Custom Builders LLC is owned and operated by Mark Sosa, according to its website, which also claims 20 years of construction experience. In a 2024 review, a customer said Mark redid their kitchen with new cabinets, replaced the countertop, and installed a dishwasher and a new sink. In a 2026 review, a customer mentioned very reasonable rates and good handiwork.
Very reasonable rates and good handiwork
Quality work. Extremely happy with how everything came out!
Great company, great people, excellent work !
Mark did a nice job redoing my kitchen. The New cabinets are of good quality and look beautiful. He also replaced the countertop and installed a dishwasher as well as a new sink. He made sure I was satisfied with the work he did. I would recommend River Road Custom Builders.
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2 changes recorded — last scanned Oct 30, 2026.
Typical New Hampshire range for this kind of work, from regional averages — not a quote from River Road Custom Builders. Use it to sanity-check bids, then get the real number in writing.
A typical single-level deck is 12×16 — about 200 sq ft.
Estimated range
$6,800 – $12,800
Typical carpentry project around $9,800
In-law cottage addition management4.9
