Northern States Basement Systems
Waterproofing
Serving Duluth, MN
From Google Business Profile
5.0
44 Google reviews
Hours
| Monday | 8 AM–4 PM |
| Tuesday | 8 AM–4 PM |
| Wednesday | 8 AM–4 PM |
| Thursday | 8 AM–4 PM |
| Friday | 8 AM–4 PM |
| Saturday | Closed |
| Sunday | Closed |
Google categories: Waterproofing service
View on Google Maps →Last checked October 12, 2026.
More from Google Business Profile
Listed features
- Accessibility
- Wheelchair accessible parking lot
Photos on Google: 14
Recent Google reviews (excerpts)
Written by Google users, not by EdgeLocal. EdgeLocal has not verified them and does not show reviewer names.
5 out of 5 stars · Sep 2026 · Owner replied
We had an egress window well replaced. The whole experience was absolutely fantastic, from the time they came out to give an estimate, to the time the window well was installed! Extremely nice and professional people to work with. One…
5 out of 5 stars · Jun 2026 · Owner replied
NSBS did a beautiful job fixing a large crack in my foundation and installing a crawl space entry door. Dave did my initial assessment and gave me a fair and honest opinion of the work that needed to be done. Sean, the foreman on the…
5 out of 5 stars · Jun 2026 · Owner replied
I have worked previously with CEO Dave Pollock and the experiences were always 100 percent positive. So I had absolutely no hesitation to reach out to them again for my needs. I would always highly recommend them.
The owner replied to 5 of the 5 most recent reviews Google showed.
From Google Business Profile, last checked October 12, 2026.
About waterproofing in Duluth
Basement waterproofing contractors stop leaks with drainage systems, sump pumps and sealing. Waterproofing contractors install interior drain tile and sump pumps, exterior membranes, crack injection, window well drainage, vapor barriers and dehumidifiers to keep basements dry.
Typical cost: $3,000–$12,000 for interior drainage systems. See the full cost guide
Typical U.S. ranges from industry sources (2024–25); not EdgeLocal data. Your quote will vary with scope, materials and location.
Questions to ask this contractor
- Identify the water source: Grading and gutters may solve problems for less.
- Compare interior and exterior options: Ask for pros and cons of each.
- Ask about the sump pump: Get pump brand, capacity and backup options.