- 4 beds
- 5 baths
- 5,000 sqft
- ~6 acre lot
- $750 per sqft
- 1981 build
- – on site
Completely Renovated Modern Escape for the Design-Savvy Buyer. Every inch of this stunning retreat has been thoughtfully transformed by its interior designer owner—from the fully renovated interiors and spa-like bathrooms to the newly built 2-car garage - a sleek extension of the home’s design, and a showstopping new 20x40 gunite pool. The lower level has been converted to additional space with poured concrete floors with radiant heat, a full bathroom, gym with sauna and a mudroom area. Set on 5+ private acres in an unbeatable location—just 5 minutes to Bedford, Katonah, Pound Ridge, and Cross River— 21 Black Spring offers the seclusion you crave while keeping you close to everything that matters. Inside, thoughtful details abound—an open-concept Bilotta kitchen, a dramatic Moroccan-tiled gas fireplace, and a light-filled office with deck access. Floor-to-ceiling windows and mahogany sliding doors seamlessly connect the indoors to the outdoors, leading to a 2022 Ipe wood deck overlooking the serene landscape. The flexible layout offers two primary suite options, including a second-floor retreat with a custom California Closets walk-in and spa-like ensuite bath. Outside, the 20x40 gunite pool with a PebbleTec finish and Ipe wood pool deck create a private oasis that feels like a boutique getaway. Additional improvements include curated landscaping, all new mechanicals, a whole-home generator, complete propane conversion, Sonos speakers throughout, solid-core doors with Baldwin hardware, and more. For nature lovers, there is a pond on the property that leads into a babbling brook & it's walking distance to Ward Pound Ridge Reservation, offering miles of scenic trails right at your doorstep. Culture and fine dining are also within easy reach, with Caramoor Center for the Music & Arts just minutes away and renowned restaurants like The Bedford Post and The Inn at Pound Ridge by Jean-Georges nearby. Located in the highly sought-after Katonah-Lewisboro School District and zoned for Katonah Elementary School. This is a rare offering for those who appreciate quality over quantity, timeless design, and total privacy—without sacrificing proximity to the city.
Last checked:
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Checking…
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Last updated Jul 13, 2025
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MLS# 860665 —
The Building
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Year Built:1981
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Basement:true
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Architectural Style:Contemporary, Mid-Century Modern
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Construction Materials:Wood Siding
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Patio And Porch Features:Deck
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Year Built Effective:2023
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Building Area Units:Square Feet
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Exterior Features:Basketball Hoop, Fire Pit, Gas Grill, Juliet Balcony, Lighting, Speakers
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Window Features:Floor to Ceiling Windows, Skylight(s), Wall of Windows
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Security Features:Security Gate
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Laundry Features:Laundry Room
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Attic:None
Interior
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Living Area:5000
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Total Rooms:12
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Interior Features:First Floor Bedroom, First Floor Full Bath, Double Vanity, Eat-in Kitchen, Entrance Foyer, High Ceilings, Kitchen Island, Primary Bathroom, Open Floorplan, Open Kitchen, Quartz/Quartzite Counters, Recessed Lighting, Smart Thermostat, Soaking Tub, Walk-In Closet(s)
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Fireplace Features:Gas, Living Room
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Fireplaces Total:1
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Fireplace:true
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Flooring:Concrete, Hardwood
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Living Area Source:Plans
Financial & Terms
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Lease Considered:false
The Property
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Fencing:Fenced
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Lot Features:Private
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Lot Size Acres:5.6
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Parcel Number:2000-062-018-00001-000-0003
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Property Type:Residential
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Property Subtype:Single Family Residence
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Lot Size SqFt:243,936 Sqft
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Property Attached:false
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Property Condition:Updated/Remodeled
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Waterfront:false
Listing Agent
- Contact info:
- Agent phone:
- (914) 582-9898
- Office phone:
- (914) 238-0676
Taxes
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Tax Year:2025
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Tax Source:Municipality
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Tax Annual Amount:34292
Beds
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Total Bedrooms:4
Baths
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Full Baths:4
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Half Baths:1
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Total Baths:5
The Listing
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Special Listing Conditions:None
Heating & Cooling
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Heating:Forced Air, Propane, Radiant Floor
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Cooling:Central Air
Utilities
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Sewer:Septic Tank
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Utilities:Electricity Connected, Trash Collection Private, Water Connected
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Water Source:Well
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Electric Company:Nyseg
Appliances
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Appliances:Dishwasher, Dryer, Gas Range, Microwave, Refrigerator, Stainless Steel Appliance(s), Washer, Water Purifier Owned, Wine Refrigerator
Schools
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High School:John Jay High School
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Elementary School:Katonah Elementary School
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High School District:Katonah Lewisboro
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Middle School:John Jay Middle School
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Elementary School District:Katonah-Lewisboro
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Middle School District:Katonah-Lewisboro
The Community
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Association:false
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Senior Community:false
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Pool Features:Fenced, In Ground, Salt Water
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Pool Private:true
Parking
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Garage:true
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Garage Spaces:2
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Carport:false
Extra Units
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Other Structures:Garage(s)
Monthly cost estimate

Asking price
$3,750,000
Expense | Monthly cost |
---|---|
Mortgage
This calculator is intended for planning and education purposes only. It relies on assumptions and information provided by you regarding your goals, expectations and financial situation, and should not be used as your sole source of information. The output of the tool is not a loan offer or solicitation, nor is it financial or legal advice. |
$20,080
|
Taxes | $2,857 |
Insurance | $1,031 |
Utilities | $467 See report |
Total | $24,435/mo.* |
*This is an estimate |
Walk Score®
Provided by WalkScore® Inc.
Walk Score is the most well-known measure of walkability for any address. It is based on the distance to a variety of nearby services and pedestrian friendliness. Walk Scores range from 0 (Car-Dependent) to 100 (Walker’s Paradise).
Bike Score®
Provided by WalkScore® Inc.
Bike Score evaluates a location's bikeability. It is calculated by measuring bike infrastructure, hills, destinations and road connectivity, and the number of bike commuters. Bike Scores range from 0 (Somewhat Bikeable) to 100 (Biker’s Paradise).
Air Pollution Index
Provided by ClearlyEnergy
The air pollution index is calculated by county or urban area using the past three years data. The index ranks the county or urban area on a scale of 0 (best) - 100 (worst) across the United Sates.
Sale history
Date | Event | Source | Price | % Change |
---|---|---|---|---|
7/7/25
Jul 7, 2025
|
Price Changed | ONEKEY | $3,750,000 | -5.7% |
5/14/25
May 14, 2025
|
Listed / Active | ONEKEY | $3,975,000 | |
5/12/25
May 12, 2025
|
Coming Soon | ONEKEY | $3,975,000 | 133.8% (34.0% / YR) |