Basement waterproofing contractors serving Northville, MI: licensed companies, typical costs, and what the risk data says
Which contractors state they serve Northville, what their Michigan license records show, what the work typically costs, and how Northville scores for basement-flood risk on public data.
3 contractors serving Northville
Listed alphabetically. Each links to a public-record profile we keep, drawn from the contractor's own listings and Michigan licensing records. This is a directory of public facts, not an endorsement, and we do not rank or rate anyone.
Based in Bloomfield Township. Lists Northville among the 73 communities its own site states it serves.
License: Michigan Residential Builder license (registered as MI BASEMENTS LLC), status Issued (expires May 31, 2029)See the full public record →Based in Plymouth. Lists Northville among the 20 communities its own site states it serves.
License: Michigan Residential Builder license, status Issued (expires May 31, 2029)See the full public record →Based in Livonia. Lists Northville among the 9 communities its own site states it serves.
License: Michigan Maintenance & Alteration license (Basement Waterproofing classification), held by David Christopher Michalski, status Issued (expires May 31, 2029).See the full public record →See where your home sits before you call
Basement Risk Check gives you a free, no-obligation indicative screening of your own address's basement-flood risk, then connects you with one local pro. It takes a minute and there is no signup.
Get your free risk screening →
Ready for a physical diagnosis? Ask any licensed contractor listed above for a professional on-site inspection. Our score is an indicative screening built from public data; only an on-site inspection can confirm the actual cause and the right fix for your Northville home.
What the risk data says about Northville
Northville carries a Basement Risk Index of 43 out of 100, ranking #51 of 116 metro Detroit communities, elevated risk on our public-data index. It runs where it does mostly on housing age: 36% of Northville homes were built before 1960, before sump pumps, perimeter drain tile, and backwater valves were standard, on the region's heavy clay soil. That is the context for the license and diagnosis questions here; the full driver table, the map, and how Northville compares to its neighbors are on the Northville basement-risk breakdown →
What basement waterproofing typically costs
About 36% of Northville homes predate 1960, so which range applies depends heavily on your home's era; most whole-basement projects in the metro land between $3,000 and $15,000.
- Foundation crack injection (per crack)$400–$1,200
- Sump pump, professional install$1,200–$3,800
- Backwater valve retrofit$1,500–$3,500
- Interior perimeter drain$5,000–$15,000
- Exterior excavation$10,000–$25,000+
2026 metro Detroit ranges, compiled June 2026 from regional contractor pricing and national cost surveys. Ranges are regional, not Northville-specific. How to read a waterproofing quote →
Frequently asked questions
Why do basements flood in Northville?
Mostly housing age and soil. 36% of Northville homes were built before 1960, before sump pumps, exterior weeping tile, and backwater valves were standard, and the heavy clay soil across southeast Michigan holds water against those older foundations rather than draining.
Is a Basement Risk Index of 43 high for Northville?
A score of 43 is above the metro Detroit median of 37 (U.S. Census ACS 2020-2024, updated July 2026), ranking #51 of 116 communities. It is worth a prevention check before the next heavy rain.
How many licensed contractors does this page list for Northville?
3, each a public-record profile drawn from the contractor's own listings and Michigan licensing records, not a review or a ranking, and none paid for placement.