Listed on the National Register of Historic Places in 1982. 15 historic topographic surveys show this location, the earliest from 1891.
From the record
“Thompson Mansion, also known as Alder Manor, is a historic home located on North Broadway in the Greystone section of Yonkers, New York, United States. It is an early 20th-century mansion designed by Carrère and Hastings in the Renaissance Revival architectural style.”
Wikipedia article W. B. Thompson Mansion, CC BY-SA 4.0.
One of 250 National Register listings published here for Westchester County · listed in 1982 · category: Building.
National Register reference number.82001277- the number the National Park Service assigned this property when it was listed, and the key its nomination file is catalogued under at the National Archives.
Then and now
1891 to 1998
The ground this property stands on, surveyed
107 years apart. Drag the handle to wipe between them. Both sheets are
United States Geological Survey originals; neither has been altered.
18911998
Fires near this property
570 since 2000
Regional context, not property-specific
evidence. The
federal wildfire occurrence database
lists 570 fires within 5 miles of W. B. Thompson Mansion
between 2000 and 2020, burning about 490 acres in total. 40 started naturally. 56 were recorded as arson.
Distance is straight-line from the map coordinates, so a fire counted
here may appear on a neighbouring settlement's page as well.
Reported cause
Fires
Missing data/not specified/undetermined
367
Arson/incendiarism
56
Natural
40
Smoking
36
Recreation and ceremony
35
Equipment and vehicle use
14
Misuse of fire by a minor
7
Debris and open burning
7
Power generation/transmission/distribution
4
Other causes
3
Railroad operations and maintenance
1
The most recent of
them, most recent first, with the day each was reported and the service
that recorded it.
Regional context, not property-specific
evidence. The federal mineral resources record lists
5 workings within 5 miles of W. B. Thompson Mansion: 4 past producers, 1 producer.
1 still produces. What was taken out: Stone, Crushed/Broken, Sand and Gravel, Construction, Molybdenum, Rhenium. Distance is straight-line from the
map coordinates, so a quarry counted here may appear on a neighbouring
settlement's page as well.
Regional context, not property-specific
evidence. The National Weather Service names
Yonkers, the town this property stands in, in 27 storm reports between 1994 and 2023: 12 thunderstorm wind, 6 flash flood, 4 hail, 2 lightning.
The reports record 4 injuries. Each account below is quoted exactly as the forecast office
filed it, from the NOAA Storm Events Database, and each date
opens the federal record of that event.
A spotter reported several power lines down from this storm. Local newspapers reported that numerous trees and large tree limbs were knocked down which resulted in the loss of power for 20,000 residents and damage to Bronxville's Village Hall and school.
Isolated thunderstorms developed in a moderately unstable airmass during the afternoon hours. Dime-size hail was observed in Yonkers while numerous reports were received of hail in the range between 1/4 and 1/2 inch.
United States Geological Survey topographic
sheets whose coverage includes this point. Matched by taking the coordinate the National Park Service records for this property, then
testing that coordinate against the published boundary of every sheet.
Other National Register properties close
enough to walk or drive between, ordered by distance from this one. Both
positions come from the same geocoding pass that matched these properties
to their map sheets.
Listing record. National Park Service National Register of Historic Places, listed-properties dataset, current to 2026-05-22.
Map join. Address geocoded through the United States Census geocoder, then tested against the published boundary of every sheet in the USGS Historical Topographic Map Collection.
How this page is made. Listing fields come from federal records; map-sheet coverage is a labelled coordinate-to-boundary calculation, not a source-field claim.
Wildfire. Short, Karen C. 2022. Spatial wildfire occurrence data for the United States, 1992-2020 [FPA_FOD_20221014]. 6th Edition. Fort Collins, CO: Forest Service Research Data Archive. https://doi.org/10.2737/RDS-2013-0009.6 Collected with United States Government funding and usable without additional permissions or fees.
Mines and quarries. USGS Mineral Resources Data System (MRDS) https://mrdata.usgs.gov/mrds/ A work of the United States government, no copyright under 17 U.S.C. 105.
Storms. NOAA National Centers for Environmental Information, Storm Events Database https://www.ncei.noaa.gov/stormevents/ A work of the United States government, no copyright under 17 U.S.C. 105. Narratives are quoted verbatim from the National Weather Service report and are not edited or summarised.
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