Addison Township basement risk at a glance
| Basement Risk Index | 18 / 100 (LOWER) |
| Metro rank | #90 of 116 |
| Homes built before 1960 | 18% |
| Peak building era | 1990s (23% of homes) |
| Median year built | 1987 |
| Median home value | $416,700 |
| Median household income | $110,574 |
| Owner-occupied | 96% |
| Neighborhoods analyzed | 2 |
Addison Township's score is modeled from U.S. Census housing data; no municipal flood records are integrated yet. The Basement Risk Index is built from U.S. Census housing data and documented flood records. See our full methodology.
When Addison Township was built
Addison Township's housing is spread across several decades, peaking in the nineteen-nineties at about 23% of today's homes; relatively few of the stock, 18%, predates 1960. These are higher-value homes for the metro, and basements built before the 1960s typically lack the sump pumps, perimeter drain tile, and backwater valves that became standard later, leaving many on their original clay drain tiles.
How basement risk varies inside Addison Township
We score 2 individual neighborhoods inside Addison Township, and the pattern is skewed to the lower bands: 0 fall in the high or very high band, 0 are elevated, and 2 are moderate or lower. The number that matters is the one for your own block, not the city average.
What this means for Addison Township homeowners
Addison Township scores toward the lower end of the metro range, largely because of its newer housing. Risk is still real on clay soil, so watch for symptoms after heavy rain. Among its immediate neighbors, Addison Township scores higher than Oxford Township, so the block next door is a better guide than any metro-wide average.
Why Addison Township homes face basement risk
Basement risk in Addison Township comes down to two things: how old its houses are and the clay beneath them. With relatively few of its homes, 18%, built before 1960 and the biggest share going up in the nineteen-nineties, many sit on original clay drain tile, and southeast Michigan's dense clay holds water against those foundations rather than letting it drain.
How Addison Township compares
Addison Township's Index of 18 ranks #90 of 116 communities region-wide and sits below the metro Detroit median of 37. It runs higher than its nearby neighbor Oakland Township.
Does insurance cover it?
Often not. Standard Michigan homeowners policies commonly exclude sewer backup and groundwater unless you carry a specific endorsement. Before the next storm, it is worth reading our guide on whether insurance covers sewer backup in Michigan and checking your declarations page.
What to do about it
- Lower risk is not zero risk on the region's clay soil, a free prevention check takes about 30 minutes.
- Watch for symptoms after storms; what you see at your own home matters more than any average.
- Maintain gutters and grading, the two cheapest protections any Michigan home has.
Hiring in Addison Township?
We keep public-record profiles of metro Detroit basement waterproofing contractors, drawn from their own listings and Michigan licensing records. No ratings and no pay-to-play, just the record. Browse the contractor records →
See Addison Township on the full metro Detroit Basement Risk Index map →