Basement Authorities in ME & NH

We’re Northern NH and Western Maine’s premier specialists in basement waterproofing and structural foundation repair, we even offer 24hr emergency services including clean up and disaster restoration serving Carroll, Coos and Grafton counties in NH and Oxford, Cumberland (including Portland) and York in Maine. We’ll diagnose your situation and fix the problems, whether it’s foundation wall cracks, a faulty sump pump, leaking window wells, musty, moldy, muddy crawl spaces, high humidity, foundation settling, wet, damp basements and more.

See why we are a clear cut above the rest

Basement Authorities NH may not be the largest but we are superior in many ways. We are not a franchise but are a select group of nationally handpicked companies that have a history of Honest, Fair and Ethical business practices. This, backed by billion dollar purchasing power, the proper training, and a national network of dealer contractors gives us the edge to compete with those large cookie cutter businesses. We bring you the most up to date, tried and true solutions for any basement or structural foundation problem you may have. We are not required to buy or sell you any product, by any company. Instead we research, purchase and install only the best on the market. Our state of the art economical systems will keep you dry and safe GUARANTEED!

Free residential inspection and consultation.

Contact our office for details.

Rest assured that when we are finished you will not have to call us back unless you want to invite us to dinner!

What our customers are saying about us

We purchased our home in Gilford in 2012 and had been told by the prior owners that from time to time some moisture accumulated in the crawl space. We responded to an ad for the Basement Authority (RWN Property Services). They sent a project manager who inspected the crawl space as well as the exterior of the house. He provided an excellent analysis of why we were having water intrusion. He suggested an additional roof gutter and extending the downspouts to carry rain farther away from the house, as well as a large automatic dehumidifier for the crawl space. Our crawl space is now dry. Very professional job and very reliable.

Norman – Gilford, New Hampshire

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