Designed and built with focus on versatility, energy efficiency, and enduring craftsmanship; this one-of-a-kind contemporary home offers thoughtfully designed single-level living on the main floor, with an ADU for income potential on the second. The building is oriented to maximize the efficiency of its 26 rooftop PV panels, while the thoughtful placement of fenestration maximizes privacy, views of Trout Brook, and protection from excessive solar gain under the extended eaves of the standing-seam steel roof. Environmental sustainability efforts extend throughout the house, including high-performance insulation in the double stud-wall construction, high quality low-maintenance finish materials, factory-finished high-end Marvin windows, and all-electric operation through the use of heat-pumps, EV car charger, heat-pump washer, dryer and water heater, and induction ranges. The ground floor offers single-level living space featuring 2 ensuite bedrooms, an oversized mudroom and an open-concept kitchen/living layout. A custom masonry heater serves as both a striking architectural centerpiece and an efficient supplemental heat source. Exceptional premium finishes include locally crafted white oak kitchen cabinetry, leathered-granite countertops, 7.5'' live-sawn white oak flooring, ceramic tiled bathrooms with custom vanities and radiant heated floors. The second floor ADU is a large studio with a gorgeous bathroom, full kitchen featuring soft-close cabinets and solid white oak countertops, and almost as much private outdoor living space as indoors, by way of two covered balconies and future green roof. The cellar, accessed only by the walkout man door or the glass-paneled OHD facing the ravine, is bright, and spacious enough for projects and storage. Located in the popular coastal City of South Portland and in walking distance to every amenity, this property reflects a rare blend of innovative design and energy-conscious living.
Active
Price cut: $120K (8/25)
$875,000
55 Boothby Avenue, South Portland, ME 04106
3beds
1,790sqft
Single Family Residence
Built in 2022
0.33 Acres Lot
$-- Zestimate®
$489/sqft
$-- HOA
What's special
Views of trout brookLeathered-granite countertopsFactory-finished high-end marvin windowsOversized mudroom
- 96 days
- 1,854
- 126
Zillow last checked:
Listing updated:
Listed by:
Keller Williams Realty
Source: Maine Listings,MLS#: 1664293
Facts & features
Interior
Bedrooms & bathrooms
- Bedrooms: 3
- Bathrooms: 3
- Full bathrooms: 3
Bedroom 1
- Level: First
Bedroom 2
- Level: First
Kitchen
- Level: First
Living room
- Level: First
Mud room
- Level: First
Other
- Level: Second
Heating
- Heat Pump, Other
Cooling
- Heat Pump
Appliances
- Included: Dishwasher, Dryer, Refrigerator, Washer
Features
- 1st Floor Primary Bedroom w/Bath, In-Law Floorplan
- Flooring: Tile, Hardwood
- Basement: Exterior Entry,Walk-Out Access,Unfinished
- Number of fireplaces: 1
Interior area
- Total structure area: 1,790
- Total interior livable area: 1,790 sqft
- Finished area above ground: 1,790
- Finished area below ground: 0
Property
Parking
- Parking features: Other, 1 - 4 Spaces, On Site
Features
- Patio & porch: Deck
Lot
- Size: 0.33 Acres
- Features: Near Shopping, Near Town, Neighborhood, Level, Open Lot, Rolling Slope, Wooded
Details
- Parcel number: SPORM013L003A
- Zoning: Res A
- Other equipment: Central Vacuum
Construction
Type & style
- Home type: SingleFamily
- Architectural style: Contemporary
- Property subtype: Single Family Residence
Materials
- Wood Frame, Composition, Vertical Siding
- Foundation: Poured Concrete
- Roof: Metal
Condition
- Year built: 2022
Utilities & green energy
- Electric: Circuit Breakers, Photovoltaics Seller Owned
- Sewer: Public Sewer
- Water: Public
Green energy
- Energy efficient items: Double Wall (12''+) Construction, Water Heater
- Water conservation: Air Exchanger, Other/See Internal Remarks
Community & HOA
Location
- Region: South Portland
Financial & listing details
- Price per square foot: $489/sqft
- Tax assessed value: $659,600
- Annual tax amount: $10,262
- Date on market: 5/28/2026
- Road surface type: Paved
Estimated market value
Not available
Estimated sales range
Not available
Not available
Price history
| Date | Event | Price |
|---|---|---|
| 8/25/2026 | Price change | $875,000-12.1%$489/sqft |
Source: | ||
| 6/17/2026 | Price change | $995,000-9.1%$556/sqft |
Source: | ||
| 5/28/2026 | Listed for sale | $1,095,000$612/sqft |
Source: | ||
Public tax history
| Year | Property taxes | Tax assessment |
|---|---|---|
| 2024 | $8,707 +31.3% | $659,600 +40.7% |
| 2023 | $6,630 +33.9% | $468,900 +47.4% |
| 2022 | $4,951 +171.6% | $318,200 +244.7% |
| 2020 | $1,823 +3.4% | $92,300 |
| 2019 | $1,763 | $92,300 |
Find assessor info on the county website
Monthly payment
Est. payment







