Encompassed by more than one mile of shoreline along Casco Bay, Dingley Island is an extraordinary coastal estate with 27± acres, a shingle-style residence, deepwater dock, and exceptional privacy. With open lawns for gathering, mature woodlands to explore, and secluded stretches of rugged shoreline, the property's diverse landscape & immense privacy create a timeless setting & true sense of exclusivity along the coveted Maine coast. Set on the point of the peninsula, the main residence faces east, west, and south, beautifully capturing panoramic water views from sunrise to sunset. The shingle-style home is distinguished by its architecture, fine craftsmanship, and effortless connection between its living spaces & the surrounding landscape. The well-appointed home features 6 bedrooms, 5.5 baths, and 5,805± SF of living space with soaring ceilings, high-end finishes, and abundant natural light. An impressive double-sided Maine granite fireplace anchors the dining & living rooms, creating warm & inviting spaces suitable for quiet moments, intimate gatherings, and entertaining. A separate garage with a 948± SF, 1-bedroom, 1-bath apartment provides added space for guests. Throughout the grounds, exceptional stonework—including walls, grass-lined steps, and several patios—creates a natural progression of outdoor spaces, each thoughtfully designed for dining, enjoyment, and being immersed in the waterfront setting. A private tennis court invites recreation, while a custom-built treehouse adds whimsy & adventure. Down at the shore, the deepwater dock is safely tucked away on a protected cove, creating a serene vantage point to view local lobster boats working the bay. A true wildlife paradise, enjoy seal colonies sunbathing on nearby rock ledges, daily sightings of bald eagles & porpoises, and an array of migrating seabirds moving through the pristine landscape. More than a coastal residence, Dingley Island is a legacy estate designed to be enjoyed for generations.
Active
$8,500,000
117 Starboard Lane, Harpswell, ME 04079
7beds
6,753sqft
Single Family Residence
Built in 1995
27.64 Acres Lot
$-- Zestimate®
$1,259/sqft
$-- HOA
What's special
High-end finishesShingle-style residenceOpen lawns for gatheringAbundant natural lightSoaring ceilingsDeepwater dockMature woodlands to explore
- 7 days
- 2,806
- 312
Zillow last checked:
Listing updated:
Listed by:
LandVest, Inc.
Source: Maine Listings,MLS#: 1680258
Facts & features
Interior
Bedrooms & bathrooms
- Bedrooms: 7
- Bathrooms: 7
- Full bathrooms: 6
- 1/2 bathrooms: 1
Primary bedroom
- Level: Second
Bedroom 2
- Level: Second
Bedroom 3
- Level: Second
Bedroom 4
- Level: Second
Bedroom 5
- Level: Second
Bedroom 6
- Level: Second
Other
- Level: Second
Dining room
- Level: First
Family room
- Level: First
Kitchen
- Level: First
Kitchen
- Level: Second
Laundry
- Level: First
Living room
- Level: First
Living room
- Level: Second
Loft
- Level: Second
Office
- Level: First
Other
- Level: First
Other
- Level: Third
Sunroom
- Level: First
Heating
- Baseboard, Hot Water, Zoned
Cooling
- None
Features
- Primary Bedroom w/Bath
- Flooring: Carpet, Wood, Softwood
- Basement: Interior Entry,Full
- Number of fireplaces: 3
Interior area
- Total structure area: 6,753
- Total interior livable area: 6,753 sqft
- Finished area above ground: 6,753
- Finished area below ground: 0
Property
Parking
- Total spaces: 2
- Parking features: Gravel, Paved, 5 - 10 Spaces, Detached
- Garage spaces: 2
Features
- Patio & porch: Patio, Porch
- Has view: Yes
- View description: Scenic
- Body of water: Atlantic Ocean
- Frontage length: Waterfrontage: 5564,Waterfrontage Owned: 5564
Lot
- Size: 27.64 Acres
- Features: Near Golf Course, Near Public Beach, Near Shopping, Near Town, Near Railroad, Landscaped, Wooded
Details
- Additional structures: Outbuilding
- Parcel number: HARPM058L070
- Zoning: Shoreland
- Other equipment: Generator
Construction
Type & style
- Home type: SingleFamily
- Architectural style: Cottage,Shingle
- Property subtype: Single Family Residence
Materials
- Wood Frame, Shingle Siding, Wood Siding
- Roof: Metal
Condition
- Year built: 1995
Utilities & green energy
- Electric: Circuit Breakers
- Sewer: Septic Design Available, Septic Tank
- Water: Private, Well
Community & HOA
Location
- Region: Harpswell
Financial & listing details
- Price per square foot: $1,259/sqft
- Tax assessed value: $7,045,400
- Annual tax amount: $47,504
- Date on market: 9/11/2026
- Road surface type: Dirt
Estimated market value
Not available
Estimated sales range
Not available
Not available
Price history
| Date | Event | Price |
|---|---|---|
| 9/11/2026 | Listed for sale | $8,500,000$1,259/sqft |
Source: | ||
Public tax history
| Year | Property taxes | Tax assessment |
|---|---|---|
| 2024 | $44,809 +4.3% | $7,045,400 |
| 2023 | $42,977 +3.9% | $7,045,400 +0.5% |
| 2022 | $41,365 +12.2% | $7,011,100 +28.1% |
| 2020 | $36,877 +0.6% | $5,471,400 |
| 2019 | $36,658 +3.4% | $5,471,400 |
| 2018 | $35,455 +0.3% | $5,471,400 |
| 2017 | $35,345 +0.9% | $5,471,400 |
| 2016 | $35,017 +2.6% | $5,471,400 |
| 2015 | $34,142 +8% | $5,471,400 |
| 2013 | $31,625 -15.7% | $5,471,400 -12.5% |
| 2010 | $37,528 | $6,254,700 |
Find assessor info on the county website
Monthly payment
Est. payment





