Radon testing in Manhattan: what to know
Manhattan is the densest borough in the country, and its housing stock runs from the early-1900s tenements of the Lower East Side, East Village and Chinatown to grand pre-war apartment buildings and co-ops on the Upper East and Upper West Sides. Thin walls, shared stairwells, original plumbing risers and deep baseboard gaps give German cockroaches and mice constant routes between the island's tightly packed units.
Travel density makes Manhattan a bed bug hotspot: hotels, short-term rentals, frequent sublets and a steady stream of international visitors mean even spotless luxury co-ops face introductions through luggage and second-hand furniture, not poor hygiene. In multi-unit buildings a single untreated apartment rarely ends the problem, because bed bugs move along shared walls and risers.
The borough's restaurant and transit density — Times Square, Penn Station, Midtown food corridors and the subway beneath them — sustains one of the city's largest rat populations, feeding rodent pressure out into adjacent residential blocks, while green edges along Central Park, Riverside Park and the Hudson add seasonal ant and occasional-invader pressure to lower-floor and garden apartments.
Signs you need radon testing
- You're buying or selling a home and radon testing is part of the transaction or requested by the buyer
- You've never tested your current home for radon, or it's been several years since the last test
- You have a finished basement or spend significant time in the lowest level of the home
- A neighbouring property or your general area has previously tested with elevated radon
- You want a long-term test to understand your home's actual average radon exposure across seasons
How we treat radon testing in Manhattan
Radon is a naturally occurring gas produced by the breakdown of uranium in soil and rock, and it can seep into homes through foundation cracks, sump pits, and gaps around pipes entering the basement or lowest level. It has no smell, no color and no taste, which means the only way to know whether a home has an elevated radon level is to test for it — you cannot detect it by any of your senses, and levels vary from house to house even on the same street depending on soil conditions and how the specific foundation was built.
There are two general testing approaches. Short-term tests (commonly run over a period of a few days) give a quicker read and are common in real-estate transactions where time is limited; long-term tests (commonly run over 90 days or more) give a more representative picture of a home's average radon level across seasonal variation, since radon levels can fluctuate. The EPA publishes guidance on both testing approaches and on what level of radon warrants mitigation — we follow that guidance rather than asserting our own threshold.
Local landmarks & coverage
We serve all of Manhattan and the surrounding Manhattan area — including Central Park, Times Square, Empire State Building, Wall Street, Grand Central Terminal, the High Line — across ZIP codes 10001, 10002, 10009, 10011, 10014, 10016, 10019, 10025, 10027, 10128.