Gibraltar basement risk at a glance
| Basement Risk Index | 37 / 100 (ELEVATED) |
| Metro rank | #58 of 116 |
| Homes built before 1960 | 35% |
| Peak building era | 2000s (25% of homes) |
| Median year built | 1975 |
| Median home value | $223,200 |
| Median household income | $91,651 |
| Owner-occupied | 82% |
| Neighborhoods analyzed | 1 |
Gibraltar'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 Gibraltar was built
Gibraltar's housing is spread across several decades, peaking in the two-thousands at about 25% of today's homes; some of the stock, 35%, predates 1960. These are mid-range 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 Gibraltar
We score 1 individual neighborhoods inside Gibraltar, and the pattern is skewed to the lower bands: 0 fall in the high or very high band, 0 are elevated, and 1 are moderate or lower. The number that matters is the one for your own block, not the city average.
What this means for Gibraltar homeowners
Gibraltar sits above the lighter end of the scale. The averages hide block-to-block variation, so the most useful step is finding out where your specific home stands. Among its immediate neighbors, Gibraltar scores higher than Rockwood, so the block next door is a better guide than any metro-wide average.
Why Gibraltar homes face basement risk
Basement risk in Gibraltar comes down to two things: how old its houses are and the clay beneath them. With some of its homes, 35%, built before 1960 and the biggest share going up in the two-thousands, many sit on original clay drain tile, and southeast Michigan's dense clay holds water against those foundations rather than letting it drain. Gibraltar sits on the Detroit River near Lake Erie, and low-lying ground near the water keeps the seasonal water table close to basement floors, so hydrostatic seepage can matter as much as sewer capacity here.
Documented local factors
The City of Gibraltar says flooding there is influenced by "water levels, weather trends (i.e. high rainfall, receiving heavy amount of rain in a short period of time, or easterly winds)," that heavy rainfall "can overburden the storm sewer system," and that its Water & Sewer Department "has installed pumps at several high risk points in the city."
City of Gibraltar, Flood Protection · checked 2026-07-26
How Gibraltar compares
Gibraltar's Index of 37 ranks #58 of 116 communities region-wide and sits level with the metro Detroit median of 37. It runs higher than its nearby neighbor Woodhaven.
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
- Compare your block on the metro map to see how your specific area compares within the community.
- Walk the basement after the next hard rain for dampness, white mineral lines, or a musty smell.
- Extend downspouts and check grading so water flows away from the foundation. More on keeping a basement dry.
Hiring in Gibraltar?
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 →
Public records of contractors whose own listings say they serve or are based in Gibraltar: Michigan Basements.
See Gibraltar on the full metro Detroit Basement Risk Index map →