421 E Sidney Ave, Mount Vernon, NY 10553 Property Records

Westchester County and Mount Vernon City property record for 421 E Sidney Ave, Mount Vernon, NY 10553

Property Summary

Property Type	Single Family Home
Lot Size	0.15 acres (6,534 sqft)
Owner	Individual Name on File
Tax Bill	$14,496 (2025)
Flood Zone	Zone X (minimal risk)
APN	`550800 165.57-2086-7`

Property Details

APN / Parcel Number

Primary APN	`550800 165.57-2086-7`
Alternative APNs	`080016505720860070000000` `040350`

Exterior

Lot Area	6,534 sqft (0.15 acres)

Location & Zoning

Account Number	040350
Street Address	421 E SIDNEY AVE
City	MOUNT VERNON
State	NY
Zip	10553-1115
Property Category	Residential
Property Type	Residential > Single Family > Home
Legal Subdivision	MAP OF PART OF DARWOOD
Legal Block	2086
Legal Lot Number	7.000
Jurisdiction	WESTCHESTER NY
Township / Civil Division	MOUNT VERNON
Census Block Group	3
Census Block	3005
Census Tract	4100

Owner

Source: Westchester County and Mount Vernon City records · APN 550800 165.57-2086-7

Assessment roll updated May 14, 2026 · Last verified May 2026

Owner names and exact recorded amounts shown locked on this page are available instantly with a free trial.

Owner of Record	Individual Name on File
Mailing Address	421 E SIDNEY AVE, MOUNT VERNON, NY 10553-1115
Occupancy	Owner Occupied
Owner Type	Individual

Deeds, Mortgages & Sale History

Assessor's Deed Record

Deed Names	Verified Name on Deed
Record Updated	Jun 08, 2026

Tax Assessment & Valuation

Source: Westchester County and Mount Vernon City records · Assessment roll updated May 14, 2026 · Last verified May 2026

Property Jurisdictions

Type	Name
State	New York
County	Westchester County
Municipality	Mount Vernon City
Unified School District	Mount Vernon School District (PK - 12)

Tax Bill & Assessment History

Assessed value and assessed market value are set for property tax purposes and are not market price estimates.

Year	Tax Bill	Assessed Value	Assessed Market Value
2025	$14,496.00	$6,840 (-) Land $4,000 Building $2,840	$380,000 (+6.67%) Land $222,222 Building $157,778
2024	Homeowner's exemption	$6,840 (-14.5%) Land $4,000 Building $2,840	$356,250 (-23.85%) Land $208,333 Building $147,917
2023		$8,000 Land $4,000 Building $4,000	$467,836 Land $233,918 Building $233,918

Flood & Wildfire

Source: FEMA National Flood Hazard Layer as of September 18, 2026 · FEMA NFIP claims and policies as of September 2026 · USDA Forest Service Wildfire Risk to Communities as of 2024 · Last verified October 2026

Flood

FEMA Flood Zone	Zone X minimal risk
Flood Insurance Requirement	Not required lenders may require it
Nearby Flood Policies	3 in force
Nearby Flood Claims	2 (2018–2022)
Claims Outside the SFHA	2 of 2
Most Recent Claim	Jun 2022 · rainfall accumulation

Wildfire

Wildfire Risk	Low lower than 97% of the US · lower than 96% of New York
Wildfire Likelihood	Under 0.01% annual chance
Exposure	None beyond ember reach

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.

Internet Providers

Source: FCC Broadband Data Collection as of December 31, 2025 · Last verified October 2026

Provider	Max Down / Up (Mbps)
Verizon Fiber · Fixed Wireless in parts of the area	2,300 / 2,300
Spectrum Cable · Fiber in parts of the area	1,000 / 1,000
T-Mobile USA Fixed Wireless	100 / 20

Based on FCC filings for 550 locations within half a mile of this property.

Drinking Water

Source: EPA Safe Drinking Water Information System as of 2026 Q3 · EPA water system boundaries as of March 2026 · Last verified October 2026

Water System	MOUNT VERNON WATER DEPARTMENT serves 73,893 people
Water Source	Purchased surface water from several systems
Last State Inspection	Jul 2025
Lead	7 ppb (2025–2027) action level 15 ppb

Violations Reported to EPA

Water Quality	None last 10 years
Treatment and Procedure	None last 10 years
Monitoring and Reporting	None last 3 years

Results are for the whole water system as reported to EPA, not water tested at this address; lead at the tap also depends on the building's own pipes. The full violation and enforcement history is in the system's EPA record.