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For sale
  • $1,495,000

    521 Barrett Hill Road, Mahopac, NY 10541

    3beds
    2,737sqft
    Loading
    Single Family Residence, Residential
    Built in 1825
    3.13 Acres Lot
    $-- Zestimate®
    $546/sqft
    $-- HOA

    What's special

    Restored original wood floorsClassic architectural proportionsSizable garden shedCustom built-insQuiet reading nookLight-filled interiorsWelcoming entry
    Half Moon Farm delivers an idyllic Hudson Valley escape just one hour from Manhattan. Set on over three serene acres, this meticulously updated 19th-century farmhouse seamlessly connects historic authenticity with modern luxury for buyers seeking a private country retreat or turnkey farm property. Originally built in the early 1800s, the historically registered three-bedroom, two-bathroom residence features restored original wood floors, light-filled interiors, and classic architectural proportions. A welcoming entry opens to a sunlit living room with a wood-burning fireplace, custom built-ins, and a quiet reading nook. Double doors lead directly to a covered patio framed by climbing grapevines and honeysuckle that invites hummingbirds into the surrounding organic herb and flower gardens. The property offers established plantings of rosemary, oregano, thyme, basil, lavender, dill, chives, sage, and lemon balm set alongside roses and butterfly bushes with rich, organically maintained soil. The kitchen pairs rustic charm with modern efficiency, featuring butcher block countertops, custom cabinetry, stainless steel appliances, and an expansive pantry with exceptional storage. A finished lower level adds flexible living space with radiant heated floors, a recreation area, and direct walkout access to the landscaped backyard. Outdoors, mature 200-to-300-year-old maple trees and historic stonework surround a secluded bluestone saltwater pool set within a former sheep paddock. The grounds double as a thriving natural sanctuary frequently visited by native wildlife, including eagles, screech owls, rabbits, indigenous tortoises, and wild turkeys. Auxiliary structures like a sizable garden shed and flexible acreage provide prime potential for future guest cottages or secondary outbuildings. Located moments from the Sedgewood Club beachfront and golf course, Half Moon Farm represents an opportunity to own an eco-conscious Hudson Valley retreat within convenient commuting distance of New York City.
    36 days
    761
    115

    Zillow last checked:

    Listing updated:

    Listed by:

    Four Seasons Sothebys Intl 845-876-5100,

    Yves S. Bouzaglo 212-363-0864

    Source: OneKey® MLS as distributed by MLS GRID,MLS#: 1059397MLS Logo

      Facts & features

      Interior

      Bedrooms & bathrooms
      • Bedrooms: 3
      • Bathrooms: 2
      • Full bathrooms: 2
      Bedroom 2
      • Level: Second
      Bedroom 3
      • Level: Second
      Bathroom 1
      • Level: Second
      Bathroom 1
      • Level: Second
      Bathroom 2
      • Level: Lower
      Bonus room
      • Level: Lower
      Dining room
      • Level: First
      Kitchen
      • Level: First
      Laundry
      • Level: Basement
      Living room
      • Level: First
      Office
      • Level: First
      Heating
      • Ducts, Forced Air, Radiant Floor
      Cooling
      • Central Air
      Appliances
      • Included: Dishwasher, Dryer, Gas Range, Refrigerator, Stainless Steel Appliance(s), Washer, Oil Water Heater, Water Softener Owned
      • Laundry: In Basement, Laundry Room
      Features
      • Beamed Ceilings, Chefs Kitchen, Crown Molding, Eat-in Kitchen, Entrance Foyer, Original Details, Pantry, Smart Thermostat, Soaking Tub, Storage, Walk Through Kitchen
      • Flooring: Hardwood, Tile
      • Basement: Finished,Walk-Out Access
      • Attic: Unfinished
      • Number of fireplaces: 1
      • Fireplace features: Wood Burning
      Interior area
      • Total structure area: 2,737
      • Total interior livable area: 2,737 sqft

      Property

      Parking
      • Total spaces: 3
      • Parking features: Off Street, Parking Lot, Private
      • Garage spaces: 1
      Features
      • Levels: Three Or More
      • Patio & porch: Patio, Terrace
      • Exterior features: Garden
      • Has private pool: Yes
      • Pool features: In Ground, Outdoor Pool, Salt Water
      • Fencing: Partial,Perimeter
      • Has view: Yes
      • View description: Trees/Woods
      Lot
      • Size: 3.13 Acres
      Details
      • Parcel number: 37200004200000010110000000
      • Special conditions: None
      • Other equipment: Dehumidifier, Generator, Pool Equip/Cover

      Construction

      Type & style
      • Home type: SingleFamily
      • Architectural style: Colonial,Farmhouse
      • Property subtype: Single Family Residence, Residential
      Materials
      • Wood Siding
      • Foundation: Stone
      Condition
      • Year built: 1825

      Utilities & green energy

      • Sewer: Septic Tank
      • Water: Well
      • Utilities for property: Cable Available, Electricity Connected, Propane

      Community & HOA

      HOA
      • Has HOA: No
      Location
      • Region: Mahopac

      Financial & listing details

      • Price per square foot: $546/sqft
      • Tax assessed value: $746,700
      • Annual tax amount: $20,222
      • Date on market: 10/6/2026
      • Cumulative days on market: 182 days
      • Listing agreement: Exclusive Right To Sell
      • Electric utility on property: Yes

        Estimated market value

        Not available

        Estimated sales range

        Not available

        Not available

        Price history

        DateEventPrice
        10/6/2026Listed for sale$1,495,000-6%$546/sqft
        Source: OneKey® MLS as distributed by MLS GRID #1059397 Report a problem
        9/16/2026Listing removed$1,590,000$581/sqft
        Source: OneKey® MLS as distributed by MLS GRID #980531 Report a problem
        4/4/2026Listed for sale$1,590,000-27.6%$581/sqft
        Source: OneKey® MLS as distributed by MLS GRID #980531 Report a problem
        1/23/2026Listing removed$2,195,000$802/sqft
        Source: OneKey® MLS as distributed by MLS GRID #914455 Report a problem
        9/26/2025Listed for sale$2,195,000+299.1%$802/sqft
        Source: OneKey® MLS as distributed by MLS GRID #914455 Report a problem
        5/8/2015Sold$550,000-7.6%$201/sqft
        Source: Agent Provided Report a problem
        4/10/2015Listed for sale$595,000$217/sqft
        Source: Brewster Brokerage #298077 Report a problem
        8/13/2014Pending sale$595,000$217/sqft
        Source: Houlihan Lawrence #298077 Report a problem
        11/10/2012Listed for sale$595,000+8.2%$217/sqft
        Source: Houlihan Lawrence #298077 Report a problem
        9/23/2011Sold$550,000-7.6%$201/sqft
        Source: Public Record Report a problem
        5/22/2011Listed for sale$595,000-6.3%$217/sqft
        Source: Houlihan Lawrence #3115851 Report a problem
        1/4/2011Listing removed$635,000$232/sqft
        Source: Prudential Real Estate #3002109 Report a problem
        10/15/2010Price change$635,000-2.3%$232/sqft
        Source: Prudential Real Estate #3002109 Report a problem
        7/1/2010Price change$650,000-3.7%$237/sqft
        Source: Prudential Real Estate #3002109 Report a problem
        1/22/2010Listed for sale$675,000+3.5%$247/sqft
        Source: Prudential Real Estate #3002109 Report a problem
        4/1/2008Sold$652,000+15.9%$238/sqft
        Source: Public Record Report a problem
        6/11/2004Sold$562,500+32%$206/sqft
        Source: Public Record Report a problem
        10/30/1997Sold$426,000+29.1%$156/sqft
        Source: Public Record Report a problem
        10/19/1994Sold$330,000$121/sqft
        Source: Public Record Report a problem

        Public tax history

        YearProperty taxesTax assessment
        2025-- $799,000 +7%
        2024-- $746,700 +5%
        2023-- $711,100 +11%
        2022-- $640,600 +6.1%
        2021-- $603,800 +2%
        2020-- $592,000 +3%
        2019-- $574,800 +2%
        2018-- $563,500 +4%
        2017$18,849 $541,800 +64.2%
        2016-- $330,000
        2015-- $330,000
        2014-- $330,000
        2013-- $330,000
        2012-- $330,000
        2011-- $330,000
        2010-- $330,000
        2009-- $330,000
        2008-- $330,000
        2007-- $330,000
        2006-- $330,000
        2005-- $330,000
        2004-- $330,000
        2003-- $330,000
        2002-- $330,000
        2001-- $330,000
        2000-- $330,000
        Find assessor info on the county website

        Monthly payment

        Estimated monthly payment$1,822
        All calculations are estimates and provided by Zillow, Inc. for informational purposes only. Actual amounts may vary.
        HOA fees may include property taxes on listings classified as Co-Ops. Contact the listing agent and/or owner for fee details.
        See how much you could borrow to make a competitive offer.

        Climate risks

        Neighborhood: 10541

        Getting around

        0 / 100
        Car-Dependent
        13 / 100
        Somewhat Bikeable

        Nearby schools

        GreatSchools rating
        Schools provided by the listing agent
        • Elementary: Austin Road Elementary School
        • Middle: Mahopac Middle School
        • High: Mahopac High School

        Source: OneKey® MLS as distributed by MLS GRID. This data may not be complete. We recommend contacting the local school district to confirm school assignments for this home.

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