Versatile Coastal Living in Historic Castine Discover the perfect blend of flexibility and charm in the heart of historic Castine. Ideally situated steps from the town dock, local inns, and restaurants, this property offers a prime location just a short walk from the town common, post office, and MMA. A Rare Opportunity: Residential or Mixed-Use Whether you are looking for a quintessential, purely residential family home or a property with income-generating potential, this versatile space fits your lifestyle. The property is permitted for both residential and commercial use, allowing you the freedom to maintain it as a spacious, private residence or to utilize the first floor for a professional office, gallery, or boutique business. Enjoy a spacious, well-maintained home featuring three bedrooms and two full baths, with a 1st-floor bath and kitchen that were beautifully renovated in 2018. The property includes a separate 1-bedroom furnished back apartment with new stove in 2023 and separate entrance and porch, offering a fantastic opportunity for year-round, reliable rental income. Alternatively, this space is perfect as a private guest suite or can be integrated into the main living area. Benefit from modern peace of mind with updated electric and plumbing in 2018, a new roof installed in 2024, and two new hot water heaters in 2026. The property also includes a new (2023) oversized detached garage in the rear of the lot, providing extra storage or parking. This property offers truly rare flexibility in an unbeatable location.
Single-familyProperty Type
1850Year Built
7,405 sq ftLot Size
$250Price/Sq.Ft.
1 car garageParking
Listed by Medan {Hank} de Raat• De Raat Realty
Bought with Karen Koos• Saltmeadow Properties, Inc.
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Market trends in 04421, ME
Last updated July 2026
Buyer's Market
Seller's Market
Balanced market
Sale-to-List Price
101.8%
+10.4% MoM
Median sale price
$585K
$78K MoM
Avg. days on market
80d
105 days MoM
Recently sold homes
3
1 MoM
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Sale and tax history for 15 Main St
Sale History
Tax History
Date
Event
Price
MREIS #1653718
Aug 3, 2026
Sold
$600,000
$250/sq ft
Apr 15, 2026
Price Changed
$649,000
$270/sq ft
Mar 9, 2026
Listed
$695,000
$290/sq ft
MREIS #1365985
Aug 14, 2018
Listed
$49,500
$21/sq ft
Aug 11, 2018
Sold
$49,500
$21/sq ft
MREIS #1348457
Aug 13, 2018
Sold
$326,500
$136/sq ft
May 5, 2018
Listed
$395,000
$165/sq ft
+13
Classic multi-use residence in Historic Castine Center, steps from the Town Dock, Harbor, restaurants and inns. Short walk to Town Common, Post Office, Library, and MMA. Commercial Zoning allows for combined residential and commercial use. Live upstairs and use the lower floor for your gallery, business, or office. Total of 4Br. and 2 full baths. Some harbor views from second floor. The 1 bedroom back apartment, with private entrance and open porch, can be used as a separate rental unit, or easily combined to expand the main house. Detached garage in rear. Vinyl siding and newer windows for easy maintenance. Newer high efficiency propane furnace. Well maintained, with a strong rental history.
Year
Property tax
Land + Additions
Assessment*
2025
$3,755 (+13.7%)
$178,400 + $169,300
$347,700
2024
$3,303 (+6.1%)
$178,400 + $169,300
$347,700
2023
$3,112 (+7.7%)
$135,200 + $128,500
$263,700
2022
$2,890 (+14.0%)
$116,100 + $106,200
$222,300
2021
$2,534
$116,100 + $106,200
$222,300
2020
$2,534 (−10.8%)
$116,100 + $106,200
$222,300
2018
$2,840 (+1.0%)
$132,000 + $109,700
$241,700
2017
$2,811 (+4.6%)
$132,000 + $107,200
$239,200
2016
$2,687
$155,300 + $126,100
$281,400
2015
$2,687
$155,300 + $126,100
$281,400
2014
$2,687 (+2.7%)
$155,300 + $126,100
$281,400
2013
$2,617
$155,300 + $126,100
$281,400
Public record
Beds
—
Baths
—
Stories
—
Lot width
—
Lot depth
—
Lot size
5,663 Sq. Ft.
Year renovated
—
Sq. Ft.
—
Year built
—
Style
Other
County
Hancock County
APN
463531
Parking Spaces
—
Basement
—
Accessible
—
HOA Dues
—
Garage
—
Features
—
Last updated by owner on Jul 27, 2026.
Property details
Parking
Parking Information
Has Garage
# of Garage Spaces: 1
Parking Features: Gravel, 1 - 4 Spaces, Detached
Vehicle Storage: 1 Car, Detached
Interior
Bathroom Information
# of Baths (Full): 3
Room 1 Information
Type: In-Law Floorplan
Level: First
Room 2 Information
Type: Other Room
Level: First
Room 3 Information
Type: Dining Room
Level: First
Room 4 Information
Type: Bedroom 2
Level: Second
Room 5 Information
Type: Kitchen
Level: First
Room 6 Information
Type: Bedroom 1
Level: Second
Room 7 Information
Type: Bedroom 3
Level: Second
Room 8 Information
Type: Living Room
Level: First
Room 9 Information
Type: Bedroom 4
Level: Second
Basement Information
Basement Entry: Interior Entry, Unfinished
Interior Features
# of Rooms: 9
Interior Features: Shower
Furnished: Unfurnished
Dishwasher, Disposal, Microwave, Electric Range, Refrigerator, Washer
Window Features: Double-Pane Windows
Flooring: Carpet, Wood
Exterior
Building Information
Construction Materials: Wood Frame, Vinyl Siding
Roof: Shingle
Total Building Area (Sq. Ft.): 2,400
Building Area Source: Public Records
Exterior Features
Patio & Porch Features: Porch
Property Information
Property Sub Type: Single Family Residence
Year Built: 1850
Above-Grade Finished Area (Sq. Ft.): 2,400
Levels: Multi-Level
Ownership: Trustees Deed
Lot Information
Lot Size (Sq. Ft.): $7,405.20
Lot Size (Acres): 0.17
Lot Size Source: Deed
Lot Features: Business District, Historic District, Intown, Near Golf Course, Near Public Beach, Neighborhood, Sidewalks
Zoning: Commercial
Financial
Tax Information
Annual Tax Amount: $3,755
Tax Year: 2025
Utilities
Utility Information
Has Heating
Heating: Baseboard, Radiator
Electric: Circuit Breakers
Sewer: Public Sewer
Utilities On: No
Water Source: Public
Water Heater: Electric
Location
Location Information
Unparsed Address: 15 Main Street, Castine, ME 04421
Directions: Lower Main Street. 5 doors up from the corner of Main and Water streets. Just up the hill from the MMA ship.
Public facts
Beds: —
Baths: —
Sq. Ft.: —
Stories: —
Lot Size: 5,663 square feet
Style: Other
Year Built: —
Year Renovated: —
County: Hancock County
APN: 463531
Home facts updated by county records on Jul 27, 2026
Around this home
Schools
Adams School
Public PreK-8 • Assigned • 0.2mi
Provided by GreatSchools
Climate risks
1/10 Flood Factor
Minimal risk of a flood reaching the building in the next 30 years
1/10 Fire Factor
Unlikely to be in a wildfire in next 30 years
4/10 Heat Factor
7 days above 89° expected this year, 16 days in 30 years
6/10 Wind Factor
72% chance of strong winds in next 30 years
1/10 Air Factor
0 unhealthy days expected this year, 0 days in 30 years
Provided by First Street
Historical weather
Castine, ME • 04421
Average low and high temperatures (°F)
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53
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44
47
34
33
19
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Sun exposure
Try the sun simulator tool to see how light moves across the property at different times of day and year.
Provided by Shadowmap
Estimated sale price
$572,000 – $692,000
Sell confidently with a local market expert in Castine.