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251 Seapuit RoadBarnstable, MA 02655MLS Number 21714996

  • Sale Price: $11,250,000The price has recently decreased
  • Listed at $14,950,000
  • 294 Days Since Sale
Price Down Payment Interest Rate Years

Est. Mortgage: $/month

Federal 30-year interest rate: 4.75% last updated on 2018-12-06

This product uses the FRED® API but is not endorsed or certified by the Federal Reserve Bank of St. Louis.

  • 8Bedrooms
  • 8Bathroom
  • 8931Square Feet
  • 5.2Acreage

An enchanted world within a world, St. Mary's Island, is a rarified setting for extraordinary living. Comprising over five acres and accessed via a short causeway, St. Mary's Island stands as one of the most unique and idyllic estate properties on Cape Cod.The location is unmatched, offering complete seclusion while in the heart of exclusive Osterville. The estate offers panoramic views of glittering North Bay and easy proximity to renowned village shops, restaurants, marinas and Wianno and Oyster Harbors clubs. Designed in the French Normandy style, this fabled residence offers grand living spaces, stellar views, magnificent grounds, and a 155-foot-long deep water dock for yachting on Nantucket Sound and the islands. As one approaches the main residence, steeply pitched gables, stucco and stone walls, and terracotta windows set the stage for the grand scale of this inimitable estate. An arched entry portico opens to a stately entrance hall with oak paneling, soaring ceilings, and ornately carved staircase balusters. The ground floor holds a two-story oak-paneled library/billiards room with arched casements, lead-paned windows, and a massive fireplace. Connected to the library through a secret passage, an intimate study with fireplace and semi-circular bay windows showcases lovely water views. A balcony overlooking the library leads to a turreted bedroom suite on the mezzanine level. At the hall's end, a stunning formal living room boasts floor-to-ceiling windows, fireplace with antique mantle, and French doors opening to an elevated English stone terrace overlooking manicured grounds and azure waters beyond. A banquet-size dining room with lofty ceilings and French doors opens to the central terrace and stone walkway leading to water and dock. Beyond lies an immense gourmet kitchen with professional-grade appliances that affords entertaining on all scales. The adjoining great room features beamed and cathedral ceilings living areas, informal dining room opening to terraces and gardens, and beautiful bay views. A fully-equipped butler's pantry, mud room, laundry, full bath, and powder room complete the main level. On the second floor, a large master suite with sumptuous bath, walk-in closet, dressing rooms, and kitchenette delivers unmatched privacy and relaxation. Nearby, meandering corridors with well-preserved period details lead to two en suite bedrooms with hardwood floors and fireplace. Connected to the main house, two discrete guest suites--one with full kitchen, sleeping areas and full bath. living and family rooms--accommodate guests or staff. A third guest suite, accessible by private exterior stairs, contains living room, sleeping area and full bath. A stone's throw from the main residence, a separate carriage house with water views is discreetly tucked into the property's lush plantings, offering wonderful privacy and water views.. With full kitchen, living room, bedroom and bath, this guest house and attached three-car garage augment refined accommodations available to guests, family or staff. Across the sprawling five acres, carefully maintained grounds include manicured lawns, English gardens and numerous outdoor living spaces of intimate and grand scale set amongst towering rhododendrons and beech trees. Surrounded by water in every direction, this fabled setting delivers an experience of timeless elegance that defies description. Accessed by a stone walkway, the 155-foot-long deep water dock serves as a gateway to Cape Cod's enviable aquatic lifestyle, with endless sailing, fishing, and boating to be enjoyed from one's backyard. St. Mary's Island...a world unto itself, and pure enchantment.

Listed by Paul E Grover of Robert Paul Properties, Inc.

Listing Sold by Robert Paul Properties, Inc.

Driving Directions

Davenport Realty Sales

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Davenport Realty Sales
20 North Main St.
South Yarmouth MA, 02664

Office: (508) 398-2293

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More Info


  • GarageYes


  • Year Built1920
  • Year Built DescriptionActual
  • Bathroom8
  • Bathrooms8
  • Full Bathrooms7
  • Half Bathrooms1
  • Bedrooms8
  • Number of Fireplaces7
  • Total Rooms19
  • Stories2
  • FoundationPoured
  • Square Feet8931
  • BasementYes
  • Basement DescriptionBulkhead Access, Full, Interior Access
  • Lead PaintUnknown
  • SQFT Source DisplayAssessor
  • Separate Living QtrsYes


  • Heat SystemForced Hot Air
  • Hot Water Water HeatTank
  • CoolingCentral Air
  • Fuel TypeOil


  • Total Assessments$6,370,300
  • Improvement Assessment$974,800
  • Other Assessments$244,400
  • Land Assessments$5,151,100


  • Modification Date2018-10-02T07:58:00
  • Original Price$18,500,000
  • Year RoundYes
  • Publish to Internet1
  • IrregularYes
  • DOM168
  • Land Court Certification NumberC193777
  • Special List CondNone
  • Date Listed08/25/2017
  • View Count74

Basic Information

  • Virtual TourClick Here
  • StatusSLD
  • Property TypeA
  • Property Subtype 1Single Family Residence
  • List Price$14,950,000
  • Sale Price$11,250,000
  • Sale Date02/21/2018
  • MLS Number21714996


  • Acreage5.2
  • TownBarnstable
  • Lot Size SourceField Card
  • Lot Size Square Feet226512
  • Flood ZoneUnknown
  • Street DescriptionPaved, Private
  • Underground Fuel TankUnknown
  • Number of Cars3
  • RenovatedYes


  • PoolNo

Water Body

  • WaterfrontYes
  • Water Body Type
    • Bay
    • Beach
    • Deep Water Access
    • Ocean
    • Private
    • Salt
  • Water ViewYes
  • Miles to Beach0 - .1
  • Beach DescriptionBay, Ocean
  • Water AccessPrivate
  • DockYes
  • Dock DescriptionDeep Water, Private


  • Building Number251
  • Unit Number
  • StreetSeapuit
  • Street SuffixRoad
  • VillageOsterville
  • StateMA
  • Zip02655
  • CountyBarnstable
  • Street Direction
  • Directions to PropertyFrom Rt. 6. Exit 5 toward Osterville. Follow Osterville/Barnstable Rd., left on Main St, right on Seapuit Rd, bear left through gates and following causeway bearing left again to island.
  • School DistrictBarnstable


  • FireplaceYes
  • Interior Features
    • Attic Storage
    • Interior Balcony
    • Linen Closet
    • Mud Room
    • Pantry
    • Recessed Lighting
    • Walk-in Closet


  • Exterior FeaturesGarden, Outbuilding, Patio, Underground Sprinkler, Yard
  • Roof DescriptionShingle
  • Property StyleOther
  • Siding DescriptionStucco


  • Number of Photos35
  • Last Picture Change Date2017-11-14T12:42:40

broker reciprocity The data relating to real estate for sale on this site comes from the Broker Reciprocity (BR) of the Cape Cod & Islands Multiple Listing Service, Inc. Summary or thumbnail real estate listings held by brokerage firms other than Davenport Realty are marked with the BR Logo and detailed information about them includes the name of the listing broker. Neither the listing broker nor Davenport Realty shall be responsible for any typographical errors, misinformation, or misprints and shall be held totally harmless.

This site was last updated December 11, 2018. All properties are subject to prior sale, changes, or withdrawal.

Davenport Realty has chosen to display only certain towns and/or types or styles of properties. This site may not show all listings that are available through the Cape Cod & Islands Multiple Listing Service, Inc.

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