Bronx County
Mold Removal in Riverdale and Fieldston
An assessment in Riverdale usually finds one building at fault rather than a neighborhood at fault, and it tells you which part of that building. There are 34 flood insurance claims in the whole recorded history of ZIP code 10471 and child asthma visits here run below the citywide rate, so the cause is almost always your own roof, riser, slope or foundation drain.
Request a quote in Riverdale
Tell us what you can see, where the water came from, and whether the building is yours or somebody else's. That is usually enough for us to say which trade you need, and who is on the hook for paying, before anyone comes out.
Would you rather talk it through? Call (315) 640-3590, answered 24/7.
$100 off your first job
Credited by us on your first booked job.
- One credit per customer per property, on your first booked job.
- Valid through December 31, 2026.
Mention this offer when you book. Full terms.
Why Riverdale's flood record points the diagnosis indoors
Only 34 National Flood Insurance Program claims have ever been filed in ZIP code 10471, against 1,184 in Throgs Neck's 10465.
Source: Federal Emergency Management Agency, OpenFEMA NFIP redacted claims, accessed 2026-09-16
FEMA's National Flood Hazard Layer returns Zone X, an area of minimal flood hazard, at Palisade Avenue in Riverdale and in Fieldston, and a query of the layer over an upland box covering the Riverdale ridge returns no special flood hazard polygons at all.
Source: Federal Emergency Management Agency, National Flood Hazard Layer, accessed 2026-09-16
In the Kingsbridge and Riverdale neighborhood 18.6 percent of homes reported leaks in 2017 against a Bronx average of 20.4 percent, 16.9 percent reported cracks or holes against a Bronx average of 20.0 percent, and the asthma emergency department visit rate for children aged 5 to 17 was 134.3 per 10,000 in 2023 against a Bronx average of 239.8 and a citywide average of 143.7.
Source: New York City Department of Health and Mental Hygiene, Environment and Health Data Portal, accessed 2026-09-16
In ZIP code 10471 the median year of construction is 1959, 90.3 percent of housing units were built before 1980, 69.7 percent are in buildings of ten or more apartments and 25.1 percent are in one or two unit houses, with 40.6 percent of occupied units rented.
Source: US Census Bureau, American Community Survey 2020-2024 5-year, accessed 2026-09-16
New York City Administrative Code section 24-154, added by Local Law 61 of 2018, defines a covered building as one containing ten or more dwelling units or sitting on a zoning lot with 25,000 or more square feet of non-residential floor area, and a covered person as the owner, the managing agent or an employee of either. For a project, meaning mold work on an area greater than ten square feet, no covered person may perform the assessment, abatement or remediation, and the work must be done by a person licensed under Article 32 of the state Labor Law.
Source: The City of New York, Local Law 61 of 2018, accessed 2026-09-16
Under the 1991 to 2020 hourly climate normals at LaGuardia Airport, the station nearest the Bronx, the normal July dew point averages 63.1 degrees Fahrenheit and never falls below 60.3 degrees at any hour of the day. August is the same, averaging 63.1 degrees.
Source: NOAA National Centers for Environmental Information, accessed 2026-09-16
Mold in a Riverdale co-op, and nobody will say whose it is?
Tell us where the damp is and we will start with an independent assessment.
Co-op or house: Riverdale's answer changes with the deed
Riverdale is two markets on one ridge and the deed decides which set of rules you are under. Around seven in ten homes here sit in buildings of ten apartments or more, mostly prewar and midcentury elevator co-ops, and a quarter are one or two unit houses. In a co-op of ten units or more, city Administrative Code section 24-154 bars the corporation, the managing agent and their own staff from doing mold work over ten square feet, so the porter cannot handle it however willing he is, and the job needs an outside assessor, a separate remediator and two filings. In a Fieldston or Palisade Avenue house none of that applies and you can start the work as soon as you decide to. Either way the water is coming from the building, not the map: FEMA returns Zone X here and a query across the whole upland ridge returns no special flood hazard area at all.
Areas within Riverdale: Fieldston
What we arrange in Riverdale and Fieldston
Mold Inspection and Assessment
Find out what is growing, how far it reaches and what water is feeding it, in writing, before anyone quotes a dollar to remove it.
Mold Assessment in Riverdale →Mold Remediation and Removal
Get the mold and the material it is living in out of the building, to a plan somebody independent wrote, with the work checked afterwards by that same independent party.
Mold Remediation in Riverdale →Water Damage Drying and Dry Out
Get the building dry inside the window where wet material is still just wet material, before a water problem turns into a licensed mold project.
Water Damage Drying in Riverdale →Mold Violation Response for Building Owners
Work out exactly what a dated mold violation, or a tenant complaint you have not answered yet, requires you to do, in what order, and who is allowed to do it.
Violation Response in Riverdale →Tell us what you are seeing in Riverdale
We will find the water before anyone touches the wall.