Mold help in Riverdale, where flood records run light
Riverdale's co-ops, rentals and hillside houses have a light flood record, so a damp wall here more likely has an inside cause worth tracing before any cleanup begins.
Which side of the city line
Inside New York City: the Bronx
Housing inspectors score a mold violation by the size of the patch, and every class carries its own deadline. The city also bars an owner, a managing agent and their staff from doing mold work over ten square feet in a building with ten or more apartments, so a state-licensed firm has to.
Past the line: Yonkers, Mount Vernon, Pelham, New Rochelle
Common questions
Is Riverdale low risk for water damage?
For flooding, the record is thin: only 34 flood insurance claims ever in ZIP 10471. With so little outside water on record, a wet wall here points first to a pipe, a roof or a drain, and those need drying just as much.
Which rules apply to a Riverdale house?
The city's owner duty covers buildings of three or more apartments, plus buildings of any size where a tenant has moderate or severe persistent asthma. A rented house is still covered by the state's habitability promise in the lease.
The four jobs in Riverdale
Choose the page that fits the problem in your building. Each one explains the job as it plays out in Riverdale's co-op towers, rentals and houses.
Local notes for Riverdale
Riverdale is not a flood story. FEMA's flood layer returns Zone X, minimal flood hazard, at Palisade Avenue and in Fieldston, and Throgs Neck's ZIP code 10465 has 1,184 such claims over the years, while Riverdale's 10471 has seen just 34. When a Riverdale building turns damp, the cause is much more likely to be in the plumbing, the roof or the envelope than in a storm surge.
The buildings point the same way. In 10471 the median year of construction is 1959, 69.7 percent of units sit in buildings with ten or more apartments, while one and two family houses make up 25.1 percent. Large buildings give the owner and manager the legal duty. The city's mold duty reaches a house only when a tenant has moderate or severe persistent asthma, though a rented house still carries the state's habitability promise in every lease.
All of Riverdale sits inside the city line, with Housing Preservation and Development handling tenant complaints and city filings applying to larger buildings. Yonkers is a short distance north, but the city rules stop at the line.
- Median year built
- 1959
- Old buildings
- 26.3 percent of housing units built in 1939 or earlier (ZIP 10471)
- Renters
- 40.6 percent of occupied units are renter occupied (ZIP 10471)
- Larger buildings
- 69.7 percent of units are in buildings of ten or more apartments (ZIP 10471)
Source: American Community Survey 2020 to 2024 5-year estimates, US Census Bureau
Who handles it here
In Riverdale the owner of a building with three or more apartments is responsible for mold and the city's Housing Preservation and Development department enforces it, while one and two family houses, which are 25.1 percent of units in ZIP code 10471, fall outside that city duty unless a tenant has moderate or severe persistent asthma. Source: New York City Department of Housing Preservation and Development, American Community Survey 2020 to 2024 5-year estimates, US Census Bureau, New York City Department of Health and Mental Hygiene
What makes buildings wet
FEMA maps Zone X, minimal flood hazard, at Palisade Avenue and in Fieldston, and only 34 flood insurance claims have ever been filed in ZIP code 10471 against 1,184 in Throgs Neck, so a wet Riverdale building is not mainly a floodplain story. Source: National Flood Hazard Layer, Federal Emergency Management Agency, OpenFEMA NFIP redacted claims, Federal Emergency Management Agency