A truly rare offering on Great Diamond Island, 218 West Shore Drive is a year-round waterfront property where Maine island living, extraordinary history, and unforgettable sunset views converge.
Part of historic Fort McKinley, a coastal defense installation constructed between 1890 and 1910 to protect Portland Harbor, the property occupies a commanding waterfront position with sweeping views toward the Portland skyline. Set on almost 3 acres with 266 feet of water frontage, and including an approved buildable house lot, it offers a meaningful connection to both the island's storied past and the surrounding seascape.
The charming cottage is attached to an original mining casemate and features an inviting living area opening to a waterside patio, two bedrooms, and one bath, with the primary bedroom located within the original casemate. Additional historic structures include a renovated second bunker, currently used as a den/office and a workshop with potential for a third bedroom, as well as a rangefinder station and gun battery.
Tucked along a private cove with beautiful westerly sunset views, this one-of-a-kind property offers privacy, character, and a remarkable connection to the sea. As part of the Diamond Cove Association, residents enjoy amenities including a pool, tennis and pickleball courts, a bowling alley, and a basketball court. Accessible by ferry or private boat, Great Diamond Island also offers a marina, an inn, and restaurants, creating an exceptional opportunity for year-round island living just minutes from Portland.
Active
$2,100,000
218 West Shore Drive, Portland, ME 04109
2beds
1,039sqft
Single Family Residence
Built in 1997
2.93 Acres Lot
$-- Zestimate®
$2,021/sqft
$725/mo HOA
What's special
Beautiful westerly sunset viewsUnforgettable sunset viewsCommanding waterfront positionTwo bedroomsCharming cottage
- 81 days
- 1,273
- 84
Zillow last checked:
Listing updated:
Listed by:
Town & Shore Real Estate 207-773-0262
Source: Maine Listings,MLS#: 1673223
Facts & features
Interior
Bedrooms & bathrooms
- Bedrooms: 2
- Bathrooms: 1
- Full bathrooms: 1
Bedroom 1
- Level: First
Bedroom 2
- Level: First
Dining room
- Level: First
Kitchen
- Level: First
Kitchen
- Level: First
Living room
- Level: First
Office
- Level: First
Heating
- Direct Vent Heater, Heat Pump, Wood Stove
Cooling
- Heat Pump
Appliances
- Included: Dryer, Microwave, Gas Range, Refrigerator, Washer
Features
- 1st Floor Bedroom, Shower, Storage, Primary Bedroom w/Bath
- Flooring: Concrete, Wood
- Basement: None
- Number of fireplaces: 1
Interior area
- Total structure area: 1,039
- Total interior livable area: 1,039 sqft
- Finished area above ground: 1,039
- Finished area below ground: 0
Video & virtual tour
Property
Parking
- Parking features: Gravel, None
Features
- Patio & porch: Deck
- Has view: Yes
- View description: Scenic, Trees/Woods
- Body of water: Casco Bay
- Frontage length: Waterfrontage: 266,Waterfrontage Owned: 266
Lot
- Size: 2.93 Acres
- Features: Abuts Conservation, Historic District, Rural, Rolling Slope, Wooded
Details
- Additional structures: Outbuilding
- Parcel number: PTLDM083EBA018001
- Zoning: residential
- Other equipment: Internet Access Available
Construction
Type & style
- Home type: SingleFamily
- Architectural style: Other,Shingle
- Property subtype: Single Family Residence
Materials
- Masonry, Wood Frame, Shingle Siding
- Roof: Metal
Condition
- Year built: 1997
Utilities & green energy
- Electric: Circuit Breakers
- Sewer: Private Sewer
- Water: Public
Community & HOA
Community
- Subdivision: Diamond Cove Homeowners Association
HOA
- Has HOA: Yes
- HOA fee: $725 monthly
Location
- Region: Portland
Financial & listing details
- Price per square foot: $2,021/sqft
- Tax assessed value: $745,200
- Annual tax amount: $16,146
- Date on market: 7/23/2026
- Road surface type: Gravel, Dirt
Estimated market value
Not available
Estimated sales range
Not available
Not available
Price history
| Date | Event | Price |
|---|---|---|
| 7/23/2026 | Listed for sale | $2,100,000+121.1%$2,021/sqft |
Source:  Maine Listings #1673223 Report a problem | ||
| 7/7/2015 | Listing removed | $950,000$914/sqft |
Source: Port Island Realty #1226345 Report a problem | ||
| 7/3/2015 | Listed for sale | $950,000+187.9%$914/sqft |
Source: Port Island Realty #1226345 Report a problem | ||
| 10/1/1998 | Sold | $330,000$318/sqft |
Source: Agent Provided Report a problem | ||
Public tax history
| Year | Property taxes | Tax assessment |
|---|---|---|
| 2024 | $10,738 | $745,200 |
| 2023 | $10,738 +5.9% | $745,200 |
| 2022 | $10,142 -19.1% | $745,200 +38.6% |
| 2020 | $12,536 | $537,800 |
| 2019 | $12,536 +3.7% | $537,800 |
| 2018 | $12,090 +3.8% | $537,800 |
| 2017 | $11,643 +2.6% | $537,800 |
| 2016 | $11,353 +2.3% | $537,800 |
| 2015 | $11,095 +3.2% | $537,800 |
| 2014 | $10,756 +3% | $537,800 |
| 2013 | $10,439 | $537,800 |
Find assessor info on the county website
Monthly payment
Est. payment
Payment breakdown
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Neighborhood: Great Diamond Island
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