- 5 beds
- 5 baths
- 3,087 sqft
- ~2 acre lot
- $3,401 per sqft
- 2004 build
- – on site
A discreet treasure in one of Cape Cod’s most prestigious enclaves, this exceptional 1.78-acre waterfront estate offers a beautifully preserved five-bedroom residence and a substantial deep-water dock with direct access to Nantucket Sound. Originally part of a historic compound long held by the Mellon family and now by philanthropist William Koch, the property presents a rare chance to own a slice of coastal legacy. Inside, the home features a main-level primary suite with study, stone fireplace, open-concept kitchen, and screened porch opening to an expansive deck with water views—perfect for entertaining or quiet reflection. Guest bedrooms upstairs enjoy generous proportions and stunning vistas. With additional buildable parcels also available, this is a unique opportunity to create a private compound in exclusive Osterville—renowned for its protected waters, world-class golf, and enduring Cape Cod charm.
Last checked:
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Last updated Jun 24, 2025
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MLS# 73395925 —
This home is listed in more than one place. See it here.
The Building
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Year Built:2004
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Year Built Details:Actual
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Year Built Source:Public Records
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Architectural Style:Cape
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Roof:Shingle
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Foundation Details:Concrete Perimeter
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Basement:Full
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Exterior Features:Porch
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Door Features:French Doors
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Patio And Porch Features:Porch
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Security Features:Security System
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Building Area Total:3087
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Building Area Units:Square Feet
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Building Area Source:Public Records
Interior
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Living Room Level:First
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Rooms Total:7
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Living Room Features:Closet/Cabinets - Custom Built, Flooring - Wood, French Doors, Deck - Exterior
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Kitchen Level:First
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Kitchen Features:Flooring - Wood, Kitchen Island, Deck - Exterior, Exterior Access, Stainless Steel Appliances
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Dining Room Level:First
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Dining Room Features:Flooring - Wood
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Flooring:Wood
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Fireplace:true
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Fireplaces Total:1
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Fireplace Features:Living Room
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Laundry Features:Bathroom - Half
Room Dimensions
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Living Area:3087
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Living Area Source:Public Record
Location
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Directions:Bridge Street to Oyster Harbors Gatehouse
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Longitude:-70.406563
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Latitude:41.611235
The Property
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Property Type:Residential
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Property Subtype:Single Family Residence
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Property Attached:false
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Parcel Number:2235298
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Zoning:RES
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Lot Size Units:Acres
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Lot Features:Cleared
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Lot Size Area:1.78
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Lot Size SqFt:77536
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Lot Size Acres:1.78
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View:Scenic View(s)
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View:true
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Waterview:Yes
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Waterview Features:Bay
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Waterfront:true
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Waterfront Features:Waterfront
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Farm Land Area Units:Square Feet
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Road Surface Type:Paved
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Road Frontage Type:Private Road
Listing Agent
- Contact info:
- Office phone:
- (508) 420-1414
Taxes
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Tax Year:2025
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Tax Annual Amount:49068
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Tax Assessed Value:6114500
Beds
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Bedrooms Total:5
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Master Bedroom Level:First
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Master Bedroom Features:Bathroom - Full, Ceiling Fan(s), Vaulted Ceiling(s), Walk-In Closet(s), Flooring - Wall to Wall Carpet, French Doors, Deck - Exterior, Exterior Access
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Bedroom 2 Level:First
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Bedroom 2 Features:Flooring - Wood
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Bedroom 3 Level:Second
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Bedroom 3 Features:Bathroom - Full, Closet
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Bedroom 4 Level:Second
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Bedroom 4 Features:Closet
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Bedroom 5 Level:Second
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Bedroom 5 Features:Bathroom - Full, Closet, Attic Access
Baths
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Total Baths:4
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Total Baths:5
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Full Baths:3
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Half Baths:2
The Listing
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Home Warranty:false
Heating & Cooling
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Heating:Central
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Heating:true
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Cooling:Central Air
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Cooling:true
Utilities
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Utilities:for Gas Range
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Sewer:Private Sewer
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Water Source:Public
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Green Energy Efficient:Thermostat
The Community
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Community Features:Shopping
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Association:true
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Association Fee:4620
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Association Fee Frequency:Annually
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Spa:false
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Senior Community:false
Parking
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Parking Features:Off Street
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Parking Total:4
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Garage:false
Monthly cost estimate

Asking price
$10,500,000
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. |
$56,224
|
Taxes | $4,089 |
Insurance | $2,887 |
HOA fees | $385 |
Utilities | $378 See report |
Total | $63,963/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).
Transit Score®
Provided by WalkScore® Inc.
Transit Score measures a location's access to public transit. It is based on nearby transit routes frequency, type of route (bus, rail, etc.), and distance to the nearest stop on the route. Transit Scores range from 0 (Minimal Transit) to 100 (Rider’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.
Max Internet Speed
Provided by BroadbandNow®
This is the maximum advertised internet speed available for this home. Under 10 Mbps is in the slower range, and anything above 30 Mbps is considered fast. For heavier internet users, some plans allow for more than 100 Mbps.
Sale history
Date | Event | Source | Price | % Change |
---|---|---|---|---|
6/24/25
Jun 24, 2025
|
Listed / Active | MLSPIN | $10,500,000 |