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Federal 30-year interest rate: 6.67% last updated on 2026-08-13

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850 Sea View Avenue Barnstable MA 02655850 Sea View Avenue Barnstable MA 02655850 Sea View Avenue Barnstable MA 02655850 Sea View Avenue Barnstable MA 02655850 Sea View Avenue Barnstable MA 02655850 Sea View Avenue Barnstable MA 02655850 Sea View Avenue Barnstable MA 02655850 Sea View Avenue Barnstable MA 02655850 Sea View Avenue Barnstable MA 02655850 Sea View Avenue Barnstable MA 02655850 Sea View Avenue Barnstable MA 02655850 Sea View Avenue Barnstable MA 02655850 Sea View Avenue Barnstable MA 02655850 Sea View Avenue Barnstable MA 02655850 Sea View Avenue Barnstable MA 02655850 Sea View Avenue Barnstable MA 02655850 Sea View Avenue Barnstable MA 02655850 Sea View Avenue Barnstable MA 02655850 Sea View Avenue Barnstable MA 02655850 Sea View Avenue Barnstable MA 02655850 Sea View Avenue Barnstable MA 02655850 Sea View Avenue Barnstable MA 02655850 Sea View Avenue Barnstable MA 02655850 Sea View Avenue Barnstable MA 02655850 Sea View Avenue Barnstable MA 02655850 Sea View Avenue Barnstable MA 02655850 Sea View Avenue Barnstable MA 02655850 Sea View Avenue Barnstable MA 02655850 Sea View Avenue Barnstable MA 02655850 Sea View Avenue Barnstable MA 02655850 Sea View Avenue Barnstable MA 02655850 Sea View Avenue Barnstable MA 02655850 Sea View Avenue Barnstable MA 02655850 Sea View Avenue Barnstable MA 02655850 Sea View Avenue Barnstable MA 02655850 Sea View Avenue Barnstable MA 02655850 Sea View Avenue Barnstable MA 02655850 Sea View Avenue Barnstable MA 02655850 Sea View Avenue Barnstable MA 02655850 Sea View Avenue Barnstable MA 02655850 Sea View Avenue Barnstable MA 02655850 Sea View Avenue Barnstable MA 02655
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  • 8Bedrooms
  • 9Bathrooms
  • 7,350Square Feet
At the west end of Osterville's iconic Sea View Avenue in Wianno, this extraordinary estate is more than a home-it is a masterpiece of craftsmanship and artistry. Set on 1.2 acres of horticultural privacy with glimpses of West Bay, the 7,350 sq. ft. residence showcases hand-built mahogany windows and doors, quartersawn oak floors, curved walls and bespoke cabinetry and moldings-all created with skill from a bygone era. Seven bedrooms in the main house are complemented by a one-bedroom apartment above the three-car garage, complete with radiant floors. Outdoors, a 50-foot gunite pool and stone terrace shaded by Japanese maples invite alfresco dining, while waves on Nantucket Sound echo just across the avenue. Ownership includes rare deeded access to a private Nantucket Sound beach and to Eel River for kayaking and paddle boarding. At 850 Sea View Avenue, every visit reveals new beauty and discoveries making this home a true legacy property. Please verify all information contained herein
Listed by Jack Cotton of Sotheby's International Realty

Listing Sold by Coldwell Banker Realty - Wellesley

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Basic Information

  • Bedrooms8
  • Mls StatusSold
  • Bathroom9
  • BuyerOfficeNameColdwell Banker Realty - Wellesley
  • Contingency Pending P&S
  • Lot Features Level
  • Parcel Number 114/001/003,2231785
  • Road Frontage DescriptionPaved

Basic Information

  • GO-List Price$7,950,000
  • MLS Number73427916
  • Modification Date06/15/2026
  • Property SubTypeSingle Family Residence
  • PurchaseContractDate04/13/2026
  • Sale Date06/15/2026
  • Sale Price$7,500,000
  • Virtual TourView Tour

Interior

  • Flooring Wood, Tile

Utilities

  • Cooling Central Air
  • Cooling YN Yes
  • Heat SystemYes
  • Heating Central, Natural Gas
  • Sewer Private Sewer
  • Water Source Public

Amenities

  • AmenitiesShopping, House of Worship, Marina
  • Appliances IncludedGas Water Heater, Water Heater, Range, Dishwasher, Microwave, Refrigerator, Freezer, Washer, Dryer
  • Pool Features In Ground
  • Pool Private YN Yes
  • Security Features Security System

Tax Information

  • Tax Assessed Value $5,181,300
  • Tax Year 2026
  • Taxes$42,248

Rooms

  • Bathrooms Total Decimal 8
  • Bedroom 2 Second,11 x 17
  • Bedroom 3 Second,14 x 19
  • Bedroom 4 Second,12 x 12
  • Dining Room First,15 x 24
  • Family Room First,22 x 15
  • Full Bath7
  • Half Baths2
  • Kitchen First,17 x 14
  • Living Room Main, First,23 x 21
  • Master Bedroom Second,11

Building

  • BasementPartial, Partially Finished
  • Building Area Units Square Feet
  • Construction Materials Frame
  • Door Features French Doors
  • FireplaceYes
  • Fireplace Features Living Room
  • Fireplaces Total 3
  • FoundationConcrete Perimeter
  • GO-Property StyleShingle
  • Garage Spaces3
  • Patio And Porch Features Screened, Covered
  • Rooms12
  • Utilities For Gas Range
  • Year Built2005
  • Year Built Details Approximate
  • Year Built Source Public Records

Other

  • Date Listed09/09/2025
  • Farm Land Area Units Square Feet

School Information

  • High School Barnstable
  • High SchoolBarnstable

Parking

  • Parking Spaces9
  • Covered Spaces 3
  • Garage YN Yes
  • Open Parking YN Yes
  • Parking Features Detached, Garage Door Opener, Paved Drive, Off Street, Driveway

Location

  • NeighborhoodWianno
  • SubdivisionWianno
  • Address850 Sea View Avenue
  • Building Number850
  • CountyBarnstable
  • StateMA
  • StreetSea View Avenue
  • TownBarnstable
  • Zip02655

Property

  • Acreage1.22

Exterior

  • Exterior Features
    • Balcony
    • Covered Patio/Deck
    • Pool - Inground
    • Porch - Screened
    • Professional Landscaping
    • Sprinkler System
  • RoofWood

Property Information

  • Square Feet7,350
  • Building Area Source Measured
  • Living Area 7,350
  • Lot Size Square Feet 53,143
  • Lot Size Units Acres
  • View YN Yes

Water Body

  • Miles to Beach0.5
  • Waterfront Features Sound,3/10 to 1/2 Mile To Beach, Beach Ownership(Deeded Rights)

The property listing data and information, or the Images, set forth herein were provided to MLS Property Information Network, Inc. (MLSPIN) from third party sources, including sellers, lessors and public records, and were compiled by MLSPIN. The property listing data and information, and the Images, are for the personal, non-commercial use of consumers having a good faith interest in purchasing or leasing listed properties of the type displayed to them and may not be used for any purpose other than to identify prospective properties which such consumers may have a good faith interest in purchasing or leasing. MLSPIN and its subscribers disclaim any and all representations and warranties as to the accuracy of the property listing data and information, or as to the accuracy of any of the Images, set forth herein.

I agree to receive marketing and customer service calls and text messages from Levi Test Cloner2. To opt out, you can reply 'stop' at any time or click the unsubscribe link in the emails. Consent is not a condition of purchase. Msg/data rates may apply. Msg frequency varies. Privacy Policy.

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