NH and Maine's premier specialists in basement waterproofing and structural foundation repair


Welcome to 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!

Home Shows 2015
Coming Soon!

Customer Comments
  • As a recent customer of RWN my wife and I can recommend this company without hesitation. In respect to the scheduling and installation process, RWN was true to their word. Installation was completed as scheduled with no fuss or muss. You could hardly tell that their crews were on-site. Very impressed with the overall process. Good to see a company that completes the job as promised.

    - Jim C. and Pat M. Franconia NH

  • I was very pleased with the work you did to repair the leak in my basement. As you know, it leaked from the day my house was built twelve years ago. The foundation drain at the bottom of the wall was a success. Not a drop of water since the work was completed and we had plenty of rain last summer and fall. A very clean, professional and timely job.

    - Ed (Retired Engineer) North Conway NH

  • Just a quick note to express my appreciation for the installation of the new sump pump facility and drainage piping that exited the house, and went under the driveway to a drainage swale. (This work entailed the grinding removal of a 3 ft diameter tree stump.) Everything was done efficiently and professionally, and I would highly recommend you and your company, RWN, Inc.

    - BobJackson NH

  • 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

  • I am so happy with the work your company did in my basement. It looks good and I was thrilled when we were experiencing freezing/rain a few weeks ago. I did not have to bail water like in the past. I will not hesitate if and when I may need to contact you again to have more work done. For now, thank you for making my life less stressful.

    - Sandy Lemire, Gorham, New Hampshire

  • I want to say thanks to you and Basement Authorities NH for all the help in handling my basement problems this year, and let everyone know that you are the people to call if they have any water problems. I was very appreciative of the fact that you came when you said you would, detailed out the problems and my solution options and you performed the repairs as professionals without any hidden problems, all for a very reasonable price. Great Job!.

    - Tom, Laconia NH

Think about what you can do with a basement that is warm and dry.
Put in a new office, an in-law apartment, kids rooms, playrooms, or just a plain old finished basement. Our parent company RWN Inc. can help with these as well.

We are locally owned and employ certified technicians. We are very active within our communities as volunteers and care about the people and businesses we are involved with. We offer some of the best warranty's in the industry including up to a lifetime transferable warranty that stays with your home, a huge advantage if you were to sell your home.

Free in home inspections - We'll listen to your concerns and desires and custom design a system based on your planed use of space.

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