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Decosta Construction LLC is a Campton builder whose own site lists work from ICF residential construction and septic systems to decks, additions, kitchen and bath remodels and snow plowing. The company says it has been in business 30 years, and it names a service area that runs from Campton, Plymouth and Holderness to Laconia, Gilford, Hanover and Lebanon. A recent Google customer hired Decosta Construction LLC to move a shed with a crane and said the shed was moved without issues. That customer called the team nice, polite and patient in answering questions. A 2026 customer said the team kept them updated throughout the project and completed everything on time. A 2023 customer said Dana and team installed a new septic at the house on time and within budget. In a 2023 review, a customer said Dana and Nate replaced the leach field and worked on holidays, weekends and in the rain to get the job done. A 2022 customer said shingles blew off in a winter wind storm, and Dana and DeCosta Construction made one of their days longer to quickly fix the roof. That 2022 customer called the price more than fair.
Hired Decosta construction llc to move my shed with a crane. From meeting to describe my project to the delivery the process all was easy and delivery as expected. The shed was moved without issues. The team was nice, polite and patient answering all my questions. Thank you!!
We had an excellent experience with this general contractor. The team was skilled, reliable, and attentive to every detail. They kept us updated throughout the project and completed everything on time. The craftsmanship is impressive, and the finished work looks amazing. I would definitely hire them again for future projects.
Dana and team did a great job installing a new septic at my house. On time within budget and extremely friendly to deal with. Would highly recommend and I will use Decosta again in the future
Dana and Nate were prompt and responsive and did a great job replacing our leach field. They demonstrated care and quality every step of the way. They worked on holidays and weekends and in the rain to get the job done. True craftsmen!
I had some shingles blow off in one of this past winter's wind storms. With the spring rain coming, the roof needed immediate attention. Dana and DeCosta Construction, though very busy on another project, made one of their days longer to quickly fix my roof. The repair work is exceptional and the price was more than fair. If you're in a jam, we highly recommend DeCosta Construction!!
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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 Decosta Construction LLC. Use it to sanity-check bids, then get the real number in writing.
Estimated range
$20,200 – $30,800
Typical remodeling project around $25,500
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