Basement waterproofing contractors serving Detroit, MI: licensed companies, typical costs, and what the risk data says
Which contractors state they serve Detroit, what their Michigan license records show, what the work typically costs, and how Detroit scores for basement-flood risk on public data.
7 contractors serving Detroit
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 Fenton. Lists Detroit among the 10 communities its own site states it serves.
License: Michigan Maintenance & Alteration license (Basement Waterproofing classification), held by Denice Elizabeth Lustig, status Issued (expires May 31, 2029).See the full public record →Based in Eastpointe. Lists Detroit 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 Detroit 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 Detroit 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 Warren. Lists Detroit 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 Farmington Hills. Lists Detroit among the 3 communities its own site states it serves.
License: Michigan Residential Builder Company license, status Issued (issued April 2024, expires May 31, 2027).See the full public record →Based in Chesterfield Township. Lists Detroit 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 Detroit home.
What the risk data says about Detroit
Detroit carries a Basement Risk Index of 93 out of 100, ranking #5 of 116 metro Detroit communities, very high risk on our public-data index. That score blends the city's own record of more than 13,900 documented 311 water-in-basement reports with its housing age, 78% of homes built before 1960. That is the context for the license and diagnosis questions here; the full driver table, the map, and how Detroit compares to its neighbors are on the Detroit basement-risk breakdown →
Detroit's sewers are combined citywide or nearly so. Storm runoff and sanitary sewage share one set of pipes, so a hard rain can push back up through the floor drain, which changes which fix to price first: a backwater valve usually matters more here than any wall treatment. See how we classified Detroit →
What basement waterproofing typically costs
With 78% of Detroit 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 Detroit'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 Detroit-specific. How to read a waterproofing quote →
Where Detroit's own records point
Detroit publishes every 311 water-in-basement report, more than 13,900 of them since 2023. Neighborhoods that show up again and again at the top of their ZIP's counts include Cornerstone Village, Midwest, Regent Park, Dexter-Linwood, Islandview, Chadsey Condon. The pattern is not random: the reports fall hardest on the city's oldest, predominantly Black, lower-income ZIPs, by nearly a factor of three.
The city runs its own fix programs. The DWSD Basement Backup Protection Program installed backwater valves and sump pumps at no cost in 11 neighborhoods; applications are closed as of July 2026. The $43 million Private Sewer Repair Program now covers 97 Detroit neighborhoods after its March 2025 expansion, up to $40,000 per home. See every program and its status → If your basement has already backed up, Michigan law gives you 45 days to notify the city in writing: how sewer-backup claims work →.
Frequently asked questions
Why do basements flood in Detroit?
Mostly housing age and soil. 78% of Detroit 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 93 high for Detroit?
A score of 93 is above the metro Detroit median of 37 (U.S. Census ACS 2020-2024, updated July 2026), ranking #5 of 116 communities. It is worth a prevention check before the next heavy rain.
Does Detroit have combined sewers?
Yes, citywide or nearly so, 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 Detroit?
7, 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.