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MLS ID KEY1059397Last updated Oct 7, 2026

Single Family

521 Barrett Hill Road

Active · Carmel · Putnam County, NY 10541

Bedrooms
3 Beds
Bathrooms
2 Baths
Year built
1825
Est. monthly taxes
$1,685.21
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About this home

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.

Listing snapshot

Days on site
22 days
Listed on MLS
Oct 6, 2026
Full baths
2
Half baths
0
Annual property tax (MLS)
$20,222.5
Tax year
2025
Area source (MLS)
CubiCasa
Listing brokerage
Four Seasons Sothebys Intl
MLS ID
KEY1059397
Last updated
Oct 7, 2026

General features

Property type
Single Family
Property subtype
Single Family Residence
Year built
1825
Garage
Yes
Garage spaces
1
Total parking
3
Parking
Off Street, Parking Lot, Private
Water source
Well
Sewer
Septic Tank
Utilities
Cable Available, Electricity Connected, Propane

Interior features

Basement
Finished, Walk-Out Access
Heating
Ducts, Forced Air, Radiant Floor
Cooling
Central Air
Interior
Beamed Ceilings, Chefs Kitchen, Crown Molding, Eat-in Kitchen, Entrance Foyer, Original Details, Pantry, Smart Thermostat, Soaking Tub, Storage, Walk Through Kitchen
Appliances
Dishwasher, Dryer, Gas Range, Refrigerator, Stainless Steel Appliance(s), Washer, Oil Water Heater, Water Softener Owned
Flooring
Hardwood, Tile
Fireplace
Yes
Fireplaces
1

Exterior features

Architectural style
Colonial, Farmhouse
Construction materials
Wood Siding
Exterior
Garden
Private pool
Yes

Schools (MLS)

Elementary school
Austin Road Elementary School
Elementary school district
Mahopac
Middle school
Mahopac Middle School
Middle school district
Mahopac
High school
Mahopac High School
High school district
Mahopac

School information is provided by the MLS. Confirm attendance eligibility with the school district.

Recent activity

  1. Listing updated from MLS
  2. First seen on this site
  3. MLS status changed

Location

Carmel · Putnam County, NY 10541Show interactive map
521 Barrett Hill Road

Carmel · Putnam County, NY 10541

Google Maps directions

Estimate monthly payment

Loan detailsFixed-rate, fully amortizing loan. Edit the assumptions below; no market rate is supplied.
Property expenses (USD)
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Monthly property taxNot provided

Monthly association / maintenance feesNot provided

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Excludes insurance, mortgage insurance, special assessments and lender fees. MLS taxes may reflect abatements or exemptions and can change.

Listing data is supplied by the MLS and may change without notice.