Westchester County, NY Investment Property Analysis

The Honest Thesis

Westchester County is an appreciation market. Full stop.

At a 23.0x price-to-rent ratio and a 4.35% gross yield, the cash-flow math is punishing before you factor in the nation's highest median property tax bill. On the county's $879,219 median-priced asset, a 1.65% effective tax rate implies roughly $14,500 in annual taxes alone. That number devours more than a third of the gross rent a median-priced property would collect in a year. Net operating income turns negative quickly for buyers who underwrite at face value with debt.

What keeps serious capital here is the supply-demand structure. Active listings sit about 15% below pre-pandemic levels. Inventory as of late 2025 clocked in at 958 active listings with just 2.4 months of supply. Full-year 2025 single-family closed volume rose 6% to 4,662 transactions while dollar volume climbed 12% to $6.1 billion. The county-wide median single-family price reached $985,000, up 6.5% year-over-year. The ZHVI gain of 5.89% over the same period confirms that appreciation is consistent, not a single-year spike.

If your model requires positive cash-on-cash returns from day one at market rents, skip Westchester. If your model accepts 4–6% annual price appreciation backed by structural undersupply, a diversified employment base, and proximity to one of the world's largest labor markets, Westchester competes with almost any suburban market in the Northeast.

Demand Drivers

Westchester's 497,000-person employment base is diversified across sectors that hold up in recessions. Healthcare and Social Assistance alone accounts for 85,028 jobs, with the county's health and hospital systems generating $18 billion in economic impact and over 50,000 direct positions. Educational Services adds another 63,585 jobs. Professional, Scientific and Technical Services contributes 57,643 more.

On the private-sector side, Mastercard (headquartered in Purchase, with about 10,952 U.S. employees) and USI Insurance Services (headquartered in Valhalla, with about 10,475 U.S. employees) anchor the financial services cluster. Regeneron in Tarrytown anchors the life sciences cluster, which is the fastest-growing tradable sector in the mid-Hudson region and projected to expand 18% from 2021 to 2031.

Office leasing data from Q1 2026 reinforces the point: Westchester posted a 30.1% year-over-year increase in leasing activity, totaling about 450,000 SF, which ran 14% above the 10-year Q1 average. Prestige Consumer Healthcare re-committed to 79,386 SF at 660 White Plains Road in Tarrytown. Stabilizing office absorption means housing demand in Westchester is not purely dependent on NYC commuter flows.

The secular driver behind all of this is the city-to-suburbs pipeline. NYC households seeking school districts, space, and Metro-North access continue to compete for an already thin supply of homes. That pipeline is durable as long as the city's cost and density remain what they are.

Underwriting Considerations

Property Taxes

This is where Westchester deals break. The median annual tax bill is $9,223, the highest of any county in the United States, at an effective rate of about 1.65%. On an $879,000 purchase, expect to carry $14,500 or more in annual taxes. That number is not capped. Westchester uses a market-value assessment system with no assessment cap, and owners pay simultaneously to the county, town or city, school district, and in some cases a village. Any renovation or acquisition that lifts market value can trigger a higher assessment on renewal. Stress-test every deal with a 10–15% assessment increase after close.

Flood Risk

First Street Foundation projects that 20% of Westchester properties will face flood risk within 30 years. The county has only three active flood-risk-reduction projects, protecting a combined 594 properties. FEMA's post-Hurricane Sandy Advisory Base Flood Elevations already expanded the mapped hazard area across the county. Screen every parcel against current FEMA Special Flood Hazard Area maps and First Street data before proceeding. If a municipality loses National Flood Insurance Program participation by failing to adopt updated FIRMs, federally backed mortgages become unavailable for properties in those hazard zones, and resale liquidity collapses. Confirm municipal NFIP status at underwriting.

Acquisition Speed

With days on market averaging about 35 days and supply below three months, competitive offers in Westchester require speed and certainty of close. Buyers who can waive financing contingencies hold a real competitive advantage. Price in that constraint when sizing debt.

Where to Buy by Investor Profile

Appreciation Buyer: Metro-North Corridor Towns

Bronxville, Pelham, Scarsdale, Larchmont, Mamaroneck, and New Rochelle posted tight supply and price growth into early 2026. Bronxville's median sales price reached $2,837,500 in February 2026, up 7.1% year-over-year. Entry yields in these towns are deeply compressed. Model appreciation as the primary return driver and rent as partial carry. The tenant quality in these submarkets is high, turnover is low, and price floors are supported by school district premiums and walkable Metro-North access.

Value-Add Operator: ADU Conversions on Existing Lots

Westchester is actively expanding ADU permissibility across its municipalities. Dobbs Ferry broadened its ADU law in February 2025 to allow ADUs in single-family homes within multi-family residential zones. The Town of Cortlandt passed Local Law No. 4 of 2025 enabling ADUs on single-family properties. The county's model ADU ordinance recommends removing minimum lot-size requirements and reducing minimum lease terms to six months. These reforms create a legal path to add a second income stream on a lot you already own. The county's chronic shortage of small rental units means ADU product faces minimal competition from ground-up supply. Identify single-family properties in participating municipalities with detached garages, large lots, or existing basement configurations. Underwrite the ADU income as the margin that covers taxes; underwrite the primary unit for appreciation.

Workforce Rental Buyer: Mount Vernon, Peekskill, Port Chester

Southern Westchester towns with below-county median prices offer the closest thing to viable cash-flow underwriting in this market. Mount Vernon, Peekskill, and Port Chester are projected to see 5–7% appreciation as buyers priced out of Scarsdale, Larchmont, and Bronxville shift demand down-market. Entry prices are lower, displacement-driven rental demand is rising, and the workforce renter pool is stable given the density of healthcare and educational employment in the county. Taxes still bite. Run the same 1.65% effective rate against purchase price and size your rent target accordingly. Do not skip the flood screening in Port Chester, which sits on the Byram River.

Where the Puck Is Going

Three catalysts are worth tracking, though none has a firm timeline attached yet.

BRT and White Plains TransCenter. The New York State DOT's Lower Hudson Transit Link program plans multiple intra-Westchester BRT routes converging at the White Plains TransCenter, which will connect BRT lines, local bus services, and Metro-North. The I-287 BRT corridor is in active planning with county support for transit-oriented development station integration. Properties within walking distance of planned BRT nodes could carry transit premiums once construction timelines firm. The risk is that no firm schedule has been set. Watch for environmental review and funding milestones.

ADU policy expansion. County Executive Ken Jenkins, elected in February 2025 under Democratic-majority governance with an explicit pro-housing agenda, is likely to push further ADU and multifamily zoning reforms at the municipal level. Each municipality that adopts permissive ADU rules adds to the addressable lot count for value-add operators. Track local zoning board agendas in northern Westchester towns where lot sizes are larger.

Life sciences employment. The 18% projected growth in life sciences employment through 2031, anchored by Regeneron in Tarrytown and supported by the broader mid-Hudson corridor ecosystem, points to sustained above-average income household formation in northern Westchester. That employment profile supports rents at the higher end of the market in Tarrytown, Sleepy Hollow, and adjacent communities.

Model your specific deal with our investment property calculator to stress-test the tax burden, assess flood exposure by parcel, and find the rent level at which your Westchester acquisition actually pencils.