Basement waterproofing contractors serving Grosse Pointe, MI: licensed companies, typical costs, and what the risk data says
Which contractors state they serve Grosse Pointe, what their Michigan license records show, what the work typically costs, and how Grosse Pointe scores for basement-flood risk on public data.
4 contractors serving Grosse Pointe
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 Eastpointe. Lists Grosse Pointe among the 35 communities its own site states it serves.
License: Michigan Residential Builder license, status Issued (expires May 31, 2028)See the full public record →Based in Bloomfield Township. Lists Grosse Pointe 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 Warren. Lists Grosse Pointe among the 8 communities its own site states it serves.
License: Affiliated SAS entities hold active Michigan Residential Builder licenses through 2029. Confirm which entity is on your contract.See the full public record →Based in Chesterfield Township. Lists Grosse Pointe among the 9 communities its own site states it serves.
License: Michigan Residential Builder license (Thomas Beauchemin, individually licensed since 1996) plus a Maintenance & Alteration license held under the DBA “Toms Basement Waterproofing” (Basement Waterproofing classification), both status Issued (expire May 31, 2029).See the full public record →See where your home sits before you call
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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 Grosse Pointe home.
What the risk data says about Grosse Pointe
Grosse Pointe carries a Basement Risk Index of 94 out of 100, ranking #4 of 116 metro Detroit communities, very high risk on our public-data index. It runs where it does mostly on housing age: 83% of Grosse Pointe 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 Grosse Pointe compares to its neighbors are on the Grosse Pointe basement-risk breakdown →
Part of Grosse Pointe runs on combined sewers or drains to a combined-overflow district. If your block sits in the combined section, sewer backup, not wall seepage, is the failure mode to price first. Check how we classified Grosse Pointe's sewers →
What basement waterproofing typically costs
With 83% of Grosse Pointe homes built before 1960, quotes here often involve original clay drain tile, so expect the middle of these ranges more often than the bottom. On Grosse Pointe's combined-sewer footprint, price the backwater valve before anything cosmetic.
- 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 Grosse Pointe-specific. How to read a waterproofing quote →
Frequently asked questions
Why do basements flood in Grosse Pointe?
Mostly housing age and soil. 83% of Grosse Pointe 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 94 high for Grosse Pointe?
A score of 94 is above the metro Detroit median of 37 (U.S. Census ACS 2020-2024, updated July 2026), ranking #4 of 116 communities. It is worth a prevention check before the next heavy rain.
Does Grosse Pointe have combined sewers?
Yes, in part, per the operator and county records checked July 2026, so sewer backup, not just wall seepage, is a real failure mode here. See our metro combined-sewer map.
How many licensed contractors does this page list for Grosse Pointe?
4, 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.