801 E Boston Post Rd, Mamaroneck, NY 10543 Property Records

Westchester County and Rye Town property record for 801 E Boston Post Rd, Mamaroneck, NY 10543

Property Summary

Property Type	Mixed Use Commercial Office / Residential
Details	12,448 sqft · built 1950
Lot Size	0.439 acres (19,140 sqft)
Owner	Company Name on File
Last Sale	$3,450,000 (Dec 2005)
Tax Bill	$35,971 (2026)
Deeds & Mortgages	Apr 2018 Mortgage
Flood Zone	Zone X (minimal risk)
APN	`554803 154.43-2-33`

Property Details

APN / Parcel Number

Primary APN	`554803 154.43-2-33`
Alternative APNs	`480315404300020330000000` `00006899000`

Interior

Units	4 Units
Stories	1 Story
Building Area	12,448 sqft Gross Area
Basement Area	12,448 sqft
Unfinished Basement	12,448 sqft
Fire Sprinklers	Fire Sprinklers

Exterior

Year Built	Built 1950
Effective Year Built	Effective 1978
Lot Area	19,140 sqft (0.439 acres)
Lot Dimensions	119 ft deep x 154 ft wide

Utilities, Heating & Cooling

Cooling System	Partial
Heating Fuel	Oil
Sewer	Municipal
Water Source	Commercial

Location & Zoning

Account Number	00006899000
Street Address	801 E BOSTON POST RD
City	MAMARONECK
State	NY
Zip	10543-4143
Property Category	Commercial
Property Type	Commercial > Office > Mixed Use Commercial Office / Residential
Local Zoning Code	C-1 COMM
Legal Block	2
Legal Lot Number	33.000
Jurisdiction	WESTCHESTER NY
Township / Civil Division	RYE
Census Block Group	3
Census Block	3014
Census Tract	7402

Owner

801 E Boston Post Rd, a commercial property, is owned by a company that bought it in December 2005.

Source: Westchester County and Rye Town records, as of October 21, 2026

Owner of Record	Company Name on File
Mailing Address	23 GATEHOUSE RD, SCARSDALE, NY 10583-7569
Owner Type	Company
Vesting	Company

Owner names and exact recorded amounts are on file and can be viewed instantly on this page with a free 10-day trial.

Deeds, Mortgages & Sale History

Assessor's Deed Record

Deed Names	Name on Deed
Last Sale	Dec 27, 2005 · Amount on File
Deed Sale	Dec 27, 2005 · Amount on File
Deed Document Number	2005453480140
Record Updated	Oct 29, 2026

April 2018: Deed of Trust, Mortgage

Document Type	Deed of Trust
Jurisdiction	WESTCHESTER NY
Property Address	801 E BOSTON POST RD, MAMARONECK, NY 10543-4143
Document Number	0581003266
Instrument Date	Apr 5, 2018
Transaction Type	Mortgage
Record Updated	Apr 26, 2018
Title Company	SSS SETTLEMENT SERVICES LLC

Transferred To (Grantee/Buyer)

Name	Verified Name
Relationship	Company
Address	34 BLOOMINGDALE DR SCARSDALE NY 105836632, SCARSDALE, NY 10583-6632

Mortgage

Document Number	0581003266
Date	Apr 10, 2018
Book Page	058100/003266

Lender

Name	VALLEY NAT'L BK
Type	Bank
Address	JERICHO, NY 11753

Agreement

Amount	Amount on Record

Tax Assessment & Valuation

The 2026 property tax bill for 801 E Boston Post Rd was $35,971, up 47.4% from the year before.

Source: Westchester County and Rye Town assessment roll, as of May 14, 2026

Property Jurisdictions

Type	Name
State	New York
County	Westchester County
County Subdivision	Rye Town
Municipality	Mamaroneck Village
Unified School District	Rye Neck Union Free School District (KG - 12)

Tax Bill & Assessment History

Year	Tax Bill	Assessed Value	Assessed Market Value
2026	$35,971.00 (+47.37%)
2025	$24,408.00	$1,365,100 (-) Land $740,300 Building $624,800	$1,365,100 (-) Land $740,300 Building $624,800
2024		$1,365,100 (-) Land $740,300 Building $624,800	$1,365,100 (-) Land $740,300 Building $624,800
2023		$1,365,100 Land $740,300 Building $624,800	$1,365,100 Land $740,300 Building $624,800

Assessed value is set for property tax purposes, not a market price estimate; it is a fraction of this property's market value.

Flood

FEMA maps place 801 E Boston Post Rd in Zone X, an area of minimal flood risk, within 500 ft of a high-risk flood zone.

Source: FEMA National Flood Hazard Layer, effective September 18, 2026 · OpenFEMA NFIP redacted claims and policies, as of September 2026

FEMA Flood Zone	Zone X minimal risk
Nearest Special Flood Hazard Area	Zone AE, within 500 ft
Flood Insurance Requirement	Not required lenders may require it
Flood Insurance Cost	Premium on File median of 49 individual policies
Community Rating System	Class 8 (10% premium discount)
Nearby Flood Policies	88 units insured incl. 39 condo units
Nearby Flood Claims	219 (1978–2023)
Claims Outside the SFHA	154 of 219
Most Recent Claim	Sep 2023 · Severe Storm And Flooding
Claims by Event	Hurricane Sandy, Oct 2012 · 36 claims Hurricane Irene, Aug 2011 · 27 claims Coastal Storm, High Tides, Heavy Rain, & Flooding, Dec 1992 · 30 claims

Values are read at the parcel center point; flood claims are located to the census block group, not this parcel; lenders make the official flood determination.

Wildfire

Wildfire risk around 801 E Boston Post Rd is low, with less than a 0.01% annual chance of wildfire.

Source: USDA Forest Service Wildfire Risk to Communities (2nd edition), as of 2024

Wildfire Risk	Low lower than 98% of the US · lower than 97.9% of New York
Wildfire Likelihood	Under 0.01% annual chance
Exposure	Direct burnable vegetation

Values cover an area roughly 900 ft across, not the parcel itself; insurers use their own ratings.

Drinking Water

Source: EPA Safe Drinking Water Information System, as of September 2026

Water System	WESTCHESTER JOINT WATER WORKS serves 59,629 people · EPA ID NY5903435
Water Source	Surface water
Last State Inspection	Mar 2025
Lead	3 ppb (2026–2028) action level 15 ppb

Violations Reported to EPA

Water Quality	Failure to filter currently in violation since Jun 1993 Haloacetic acids resolved · Jul 2019
Treatment and Procedure	None last 10 years
Monitoring and Reporting	None last 3 years

Results are for the whole water system, not water tested at this address; lead at the tap also depends on the building's own pipes.

Internet Providers

Source: FCC Broadband Data Collection, based on 499 locations within half a mile, as of December 31, 2025

Provider	Max Down / Up (Mbps)
Optimum Fiber · Cable	8,000 / 8,000
Verizon Fiber · Fixed Wireless in parts of the area	980 / 880