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391 Sea View Avenue

Osterville, MA 02655

4 beds
7 baths
6,830 sqft
~1 acre lot
$2,196 per sqft
2020 build
– on site

Overlooking the shimmering waters of Nantucket Sound, this extraordinary Wianno estate offers an unparalleled blend of elegance, privacy, and coastal charm. With its own private sandy beach and panoramic ocean views, this is a rare opportunity to own a legacy property, along Sea View Avenue, in one of Cape Cod's most coveted enclaves. Surrounded by lush, professionally landscaped gardens, the residence is a contemporary interpretation of classic shingle-style architecture, thoughtfully designed by the acclaimed firm PSD. The home's open floor plan seamlessly integrates refined formal spaces with relaxed gathering areas--perfect for both sophisticated entertaining and fun family events. Inside, bespoke millwork, soaring ceilings, and dramatic architectural details define the living spaces, while expansive walls of glass frame breathtaking vistas of sky and sea. Each room is a celebration of light, luxury, and craftsmanship! A charming two bedroom two bathroom guest house, with its own deck and water views, provides the perfect retreat for visiting friends or family.This is a fabulous opportunity to own a gracious Osterville estate and turn dreams into reality!

Listing courtesy of CCI / Gene Orloff / Sotheby's International Realty

Last checked: Checking… • Last updated Jul 3, 2025 •

MLS# 22503232 —

This home is listed in more than one place. See it here.

The Building

Year Built:

2020
New Construction:

false
Construction Materials:

Shingle Siding
Roof:

Pitched
Foundation Details:

Poured
Stories:

2
Basement:

Partial
Exterior Features:

Garden
Door Features:

French
Window Features:

Bay/Bow Windows
Building Area Units:

Square Feet
Building Area Total:

6830
Below Grade Finished Area Units:

Square Feet

Interior

Interior Features:

Linen Closet
Kitchen Features:

Kitchen, View, Breakfast Nook, Cathedral Ceiling(s), Kitchen Island, Private Full Bath
Kitchen Description:

Countertop(s): Granite,Flooring: Wood,Door(s): French
Rooms Total:

9
Living Room Features:

Recessed Lighting, Living Room, View, Wet Bar, Built-in Features
Kitchen Level:

First
Living Room Description:

Flooring: Wood,Door(s): French
Dining Room Features:

View, Dining Room, Built-in Features
Dining Room Description:

Flooring: Wood,Door(s): French
Dining Room Level:

First
Fireplace:

true
Fireplaces Total:

3
Flooring:

Hardwood

Room Dimensions

Living Area Units:

Square Feet

Location

Directions:

From Wianno Ave South continue to the end of Wianno Avenue and take a right on Sea View Avenue past the Wianno Club, 391 Sea View Avenue is on your left.
Coordinates:

-70.379699, 41.612022
Latitude:

41.612022
Longitude:

-70.379699

The Property

Property Type:

Residential
Property Subtype:

Single Family Residence
Property Condition:

Approximate
Property Attached:

false
Parcel Number:

138031
Lot Features:

Conservation Area
Lot Size Acres:

1.23
Lot Size SqFt:

53579
Lot Size Area:

1.23
Lot Size Units:

Acres
Lot Size Source:

Assessor
Zoning:

RF-1
Waterview:

Ocean
Waterfront:

true
Waterfront Features:

Marsh
Water Body Name:

Nantucket Sound
Road Frontage Type:

Public
Road Surface Type:

Paved
Land Lease:

false

Listing Agent

Contact info:

Taxes

Tax Year:

2025
Tax Annual Amount:

92242
Tax Assessed Value:

11115900

Beds

Bedrooms Total:

4
Master Bedroom Level:

Second
Master Bedroom Features:

Walk-In Closet(s), View, Office/Sitting Area, Dressing Room, Closet, Cathedral Ceiling(s), Built-in Features
Master Bedroom Description:

Flooring: Wood
Bedroom 2 Features:

Private Full Bath, Walk-In Closet(s), Closet

Baths

Total Baths:

5.5
Total Baths:

7
Full Baths:

4
Half Baths:

3
Main Level Baths:

2
Master Bath Features:

Private Full Bath

The Listing

Home Warranty:

false
Virtual Tour URL Branded:

https://my.matterport.com/show/?m=Nm3qEc4jHYs
Virtual Tour URL Unbranded:

https://my.matterport.com/show/?m=vzgFCmQk4XL

Heating & Cooling

Heating:

Other
Heating:

true
Cooling:

Central Air
Cooling:

true

Utilities

Sewer:

Septic Tank

Appliances

Appliances:

Dishwasher

Schools

Elementary School District:

Barnstable
Middle Or Junior School District:

Barnstable
High School District:

Barnstable

The Community

Association:

false
Pool Private:

false

Parking

Parking Features:

Guest
Parking Total:

6
Garage:

true
Garage Spaces:

4
Attached Garage:

true
Carport:

false
Open Parking:

true

Monthly cost estimate

Asking price

$15,000,000

Expense	Monthly cost
Mortgage	$80,320
Taxes	$7,686
Insurance	$4,125
Utilities	$347 See report
Total	$92,478/mo.^*
	^*This is an estimate

Explore the Area

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Walk Score®

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Bike Score®

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Transit Score®

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Soundscore™

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Sale history

Date	Event	Source	Price	% Change
7/2/25 Jul 2, 2025	Listed / Active	CCI	$15,000,000	140.0% (23.9% / YR)
8/21/19 Aug 21, 2019		MLSPIN	$6,250,000

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This house located in Mid Cape, Barnstable, MA 02655 is currently for sale for $15,000,000. 391 Sea View Avenue is a 6,830 square foot house with 4 beds and 7 baths that has been on Estately for 1 days. 391 Sea View Avenue is in the Mid Cape neighborhood of Barnstable and has a WalkScore® of 7, making it car-dependent.

This site was last updated on 07/02/2025. All properties are subject to prior sale, changes, or withdrawal.