A century of building in Scarsdale

Scarsdale has been issuing building permits since before the Bronx River Parkway opened, and it has kept the paperwork. 40,166 of those records are online, 1923 to 2026. They show what was built here, what was added later, and what got knocked down and replaced.

• 40,209permits on file
• 103years covered
• 3,359parcels with a record
• 1,169pool permits

1. IWhen Scarsdale was built
2. IIA century of paperwork
3. IIIWhen the tennis courts went in
4. IVOne shelter permits in eight weeks
5. V280 generators in one year
6. VIKnocking it down and starting again
7. VIIA hundred years of swimming pools
8. VIIIThe gap between one job and the next
9. IXThe oldest and newest streets
10. XThe most documented houses
11. XIThe houses nobody touched
12. XIIThings people built in Scarsdale
13. XIIIWhat people actually build
14. XIVHow the paperwork changed its language
15. XVWhere this comes from

1925The Bronx River Parkway opens through Westchester

When Scarsdale was built

A parcel's oldest surviving permit is the closest thing the archive has to a build date. Two decades dominate: the 1920s (1,245 parcels) and the 1950s (488).

Fig. 1

The first peak is the commuter boom. The Bronx River Parkway opened through Westchester in the mid-1920s and the railway suburb filled in behind it; the archive's oldest entries are porches, dwellings and plumbing from exactly those years. The second is the postwar build-out of the remaining land. After 1960 the curve falls away and never recovers. Building did not stop; the land ran out. Almost everything after that is people rebuilding on lots that already had a house on them.

These dates come from the oldest permit still on file, which is usually later than the year the house was built. A house from 1910 whose earliest surviving paperwork is a 1926 porch shows up here as 1926. So the early decades are undercounted, and the real figures for the 1920s and before are higher than this chart can show.

A century of paperwork

Every dated permit, all 40,166 of them, in one line.

Fig. 2

Two peaks with a deep dip between them. The first peak is the commuter boom, the same one showing as the 1920s column in Fig. 1. The dip is the war: the village averaged 69 permits a year in the late 1930s and 26 a year from 1942 to 1945, when timber, steel and copper were rationed. The second peak is the postwar build-out, and it is the last time Scarsdale added houses instead of replacing them.

Everything to the right of it is work on houses that already existed. The rest of this page is that work broken apart — the generators in Fig. 4, the demolitions in Fig. 6, the pools in Fig. 7.

1957The first tennis court that actually gets built

When the tennis courts went in

Backyard tennis courts show up much later than the houses do.

Fig. 3

A court was applied for in 1928 and cancelled. The first one actually built went up in 1967 at 10 Heathcote Rd. The busiest decade is the 1990s, with 24 permits — roughly five a year, and only 56 addresses in the village have ever had one. The count has fallen every decade since. A court takes up a large flat piece of a lot, which is why several of them show up later in demolition records.

1961The Berlin Wall goes up in August; tanks face off at Checkpoint Charlie in October

One shelter permits in eight weeks

Scarsdale has 3 bomb and fallout shelter permits on file across the whole Cold War, at 3 addresses in a village of several thousand houses. 1 of the 3 were pulled in November and December 1961, at 1 houses.

The Berlin Wall had gone up that August. Kennedy had told Americans that summer to build shelters, and by late October Soviet and American tanks were facing each other at Checkpoint Charlie. Scarsdale issued 1 shelter permits in the last eight weeks of the year and 2 in the twenty-five years that followed.

Every shelter permit in the archive, in date order.

Ogden Rd accounts for 1 of them — three neighbours on one street, within weeks of each other. Two of the permits record what became of the shelters: one reads “original bomb shelter now used for storage,” another “fallout shelter — used as pantry.” Several were never dug.

2012Hurricane Sandy takes power out across Westchester for a week

280 generators in one year

Standby generators first appear in 1997. Over the next eleven years the village issued 33 of them in total.

Fig. 4

Hurricane Sandy came ashore at the end of October 2012 and took power out across Westchester for a week or more. The following year Scarsdale issued 280 generator permits — 4.8 times the 58 issued in 2012, and more than any year before or since. That is 164 houses in one year, about one single-family house in 31. The line never drops back to where it was: in the ten years before Sandy the village averaged 17 generator permits a year, and in the ten after, 74. 625 parcels have taken out a generator permit at some point, 12% of the village's single-family houses.

The spike is in March, not November

Counted by week rather than by year, the spike is four months after the storm.

Fig. 5

For the first four months the line barely moves — no week above 7. The jump is week 19, the week of 11 March 2013, at 13 permits. The outage was over by mid-November and almost nobody filed until March. Sandy is named in two permits out of 40,209, so the storm never appears in the text; the only evidence for it is when the permits were pulled.

2017Demolitions peak

Knocking it down and starting again

Scarsdale stopped having empty lots to build on around 1960. Since then almost every new house has replaced one that was already standing.

Fig. 6

This is the pattern behind the assessment jumps elsewhere on this site. A parcel carrying a small older house is assessed modestly for years, is bought, demolished and rebuilt much larger — and its assessed value moves by a multiple rather than a percentage. That is why a single address on an otherwise flat street can triple in one roll — see the biggest assessment increases.

Fig. 1 is the decades that added houses. Fig. 6 is what replaced them.

What a teardown looks like in the paperwork

The same pairs of permits keep turning up on one parcel within two years. How often the second job follows the first, against how often it appears at all:

Same parcel, second permit within 24 months, 1990 onward. Base rate is how often that second job appears anywhere.

Demolition is followed by a new dwelling 34% of the time, and the two permits are filed a median of 30 days apart, so the replacement is usually approved before the old house is down. After that, 47% of new houses take out a generator permit and 30% take out a pool permit inside two years.

2021Travel shuts down; pool permits double

A hundred years of swimming pools

The oldest pool permit on file is April 1926, at 13 Cooper Rd. It was cancelled — the record reads PMT : 00801 - POOL - VOID — so no pool was built that year. The first that went ahead was 1929 at 19 Heathcote Rd. There are 1,169 pool permits now, across 403 parcels.

Fig. 7

The count climbs through the postwar decades, then jumps in 2021 and 2022 while travel was shut down. It has dropped by roughly two thirds since.

The gap between one job and the next

Some houses pull the same kind of permit more than once. This is the gap between the two, for single-family houses.

Years between one house's consecutive permits in the same category. The dot is the median and the bar covers the middle half of the intervals, so a wide bar means houses vary a lot. Single-family parcels only. Consecutive permits must be at least two years apart, so the plumbing permit that accompanies a building permit does not count as a second job.

For garages and pools the median gap is 29 years. Kitchens are 19 and bathrooms 10. Those last two are not replacement cycles: most of these houses have more than one bathroom, so the second permit is usually a different room.

This is not how long anything lasts. A house that has done the job once contributes nothing, so every figure is an interval among repeaters. Roofs, windows and boilers were on this chart until the matches were checked one by one: about a third of the hits were the Garth Road apartment blocks and the Popham Road shops rather than houses, and the rest were jobs that merely mentioned the word — “rooftop HVAC”, “window well”, a sidewalk shed. Restricted to houses and to permits actually about the thing, roofs leave no usable intervals at all, so all three are gone.

The oldest and newest streets

The same dates grouped by street give the order the village filled in. About 56 years separate the earliest streets from the last.

Earliest on the record

Latest to fill in

Median year of earliest permit, streets with at least 15 parcels on file. Bar length shows how many homes on that street carry a record.

The most documented houses

15 Oak Way carries 80 permits across 98 years. These are the ten single-family homes with the longest paper trail; each links to its own page and full permit history.

Single-family parcels only, ranked by number of dated permits. Bar length is the permit count. Open any of them: 15 Oak Way · 12 Sherbrooke Rd · 9 Heathcote Rd · 55 Cushman Rd · 10 Richbell Rd.

The first six jobs on record at 15 Oak Way, as the clerks wrote them:

1. 1926GARAGE
2. 1994Wood deck & doors on garag
3. 2018TREE PERMIT. REMOVAL OF (1) SUMAC TREE, 30''.…
4. 2020MECHANICAL HEATING: REMOVE 1,000 GAL UST
5. 2021CHP-DEMO HOUSE AND DETACHED GARAGE BUILT IN…
6. 2021STREET OPENING PERMIT for sewer & water.

The village centre blocks on Garth Road and East Parkway have far more permits still, but they are apartment buildings and shops rather than houses, so they are left out here.

Longest continuous records

Single-family houses whose paperwork starts earliest and keeps going.

The houses nobody touched

251 single-family parcels carry a record running sixty years or more with no addition, no alteration, no demolition and no new dwelling anywhere in it. Boilers, plumbing, a fence, a driveway — nothing that moved a wall.

Single-family parcels with a 60-year record and nothing structural in it.

They are assessed at a median of $1,025,000. The ten houses at the other extreme, each with twelve or more structural permits, run $3,517,325.

Structural is a keyword test on free text, so a wall moved under wording this search does not recognise would be missed. Treat the list as a starting point and check any address on PROS.

Things people built in Scarsdale

Searching the descriptions turns up things that never make it into an assessment roll.

3,984 of the 40,209 permits on file were cancelled — one in ten. The 1926 pool at 13 Cooper Rd is one of them. Both treehouse permits are two more. Cancelled permits are counted in the totals on this page and excluded from the dates.

• Cat. 01Bomb and fallout shelters
  3 on file. Earliest is 1961 and was cancelled. First to go ahead: 1962, 15 Gorham Rd.PMT : 06867 - FALLOUT SHELTER *
• Cat. 02Chicken coops
  2 on file. Earliest 1943, 4 Winslow Pl.PMT : 03433 - NEW CHICKEN COOP *
• Cat. 03Stables and barns
  17 on file. Earliest is 1930 and was cancelled. First to go ahead: 1949, 990 Post Rd.PMT : 03958 - DEMOLISH BARN *
• Cat. 04Treehouses
  2 on file, all cancelled. None was ever built.PMT : 08449 - TREEHOUSE - Removed / VOID
• Cat. 05Saunas
  7 on file. Earliest 1965, 22-28 Garth Rd.PMT : 07363 - SAUNA ROOM *
• Cat. 06Gazebos and cabanas
  52 on file. Earliest 1992, 14 Overhill Rd.PMT : 13244 - CONSTRUCT A GAZEBO *
• Cat. 07Dumbwaiters
  1 on file. Earliest 2013, 37 Drake Rd.INTERIOR RENOVATIONS - BASEMENT KITCHEN RENOVATION WITH DUMBWAITER MODERNIZATION
• Cat. 08Coal
  1 on file. Earliest 1929, 14 Freightway.PMT : 01712 - Demolish old coal warehous*
• Cat. 09Squash and basketball courts
  8 on file. Earliest 1998, 42 Crane Rd.Basketball court rear yard

The chicken coop is April 1943 — wartime, when the federal government was actively encouraging households to keep hens. The treehouse permit was later marked “removed / void.” In 1929 someone applied to demolish an old coal warehouse on Freightway.

What people actually build

Each category's first application, the first one that went ahead, and its busiest year:

Solar runs 16 permits in its first thirty-eight years and 131 since 2015, 21 of them in 2025 alone.

The oldest records on file

The twelve earliest permits in the archive, one address each.

How the paperwork changed its language

Nobody edits a permit description for style. Counting the words the clerks actually typed gives a record of what people were adding to their houses, decade by decade.

Times each word appears in permit descriptions, by era.

Greenhouses drop from 54 mentions to 14. Decks run from 8 to 990 and then back to 554. Mudrooms and spas are almost entirely post-2005. The words that separate recent permits most sharply from older ones are dbh, arborist, maple and oak: since 2005 one permit in ten mentions a tree.

Where this comes from

Parcel-level permits are compiled from the Village of Scarsdale's public PROS records — permit type, status and description, with no fee amounts, which the village does not publish online. Nothing here is an official record; confirm anything that matters on PROS.

Dates on this page come from permits that went ahead. Counts include the 3,984 that did not. 709 rows arrived from the scrape as exact duplicates of another row and are dropped before anything is counted. PROS writes 1/1/1900 where no date was recorded; those 27 records are treated as undated rather than as 1900 permits. Full method: how Dale Ledger is built.

Browse the underlying records in the Scarsdale search, which carries the permit history for every individual parcel.