SUNSET PENTHOUSE MODERN LOFT — CX Cambridge Crossing the #1 biotech hub in the United States | Sierra + Tango Condominium. PH 725 is a striking modern penthouse loft duplex defined by its dramatic 17-ft floor-to-ceiling windows that frame sweeping sunset views. The first level features bamboo hardwood flooring, an open-concept kitchen and living area, quartz countertops, stainless steel appliances, updated lighting, electric roller shades, and half bath with additional storage. The upper level offers a spacious, open primary suite complete with a walk-in closet, in-unit laundry and full bath. Complex provides premium amenities including a 24/7 concierge, bike storage, and free EZ bus Ride connecting to Kendall/MIT and North Station. Unbeatable location—minutes to Downtown Boston, Logan Airport, Charles River paths, Cambridgeside Mall, Museum of Science, MGH, restaurants, cafés, Whole Foods, and with the Green Line station right at your doorstep. Offer deadline by 6pm November 24.
Sold for $685,000
$685,000
1 Earhart St Unit 725, Cambridge, MA 02141
1beds
803sqft
Condominium, Duplex
Built in 2006
-- sqft lot
$690,100 Zestimate®
$853/sqft
$4,039 Estimated rent
Home value
$690,100
$642,000 - $745,000
$4,039/mo
Zestimate® history
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$4,996/mo
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In-unit laundryBamboo hardwood flooringQuartz countertopsUpdated lightingStainless steel appliancesSweeping sunset viewsSpacious open primary suite
Zillow last checked:
Listing updated:
Listed by:
Alex Wong 617-459-6494,
Coldwell Banker Realty - Boston 617-266-4430
Bought with:
Alex Wong
Coldwell Banker Realty - Boston
Source: MLS PIN,MLS#: 73456108
Facts & features
Interior
Bedrooms & bathrooms
- Bedrooms: 1
- Bathrooms: 2
- Full bathrooms: 1
- 1/2 bathrooms: 1
Primary bathroom
- Features: Yes
Heating
- Central, Forced Air, Heat Pump, Electric, Individual, Unit Control, ENERGY STAR Qualified Equipment
Cooling
- Central Air, Heat Pump, Individual, Unit Control, ENERGY STAR Qualified Equipment
Appliances
- Included: Disposal, Microwave, ENERGY STAR Qualified Refrigerator, ENERGY STAR Qualified Dishwasher, Washer/Dryer, Range, Oven, Plumbed For Ice Maker
- Laundry: In Unit, Electric Dryer Hookup, Washer Hookup
Features
- Internet Available - Broadband, Elevator
- Flooring: Tile, Carpet, Bamboo, Hardwood
- Doors: Insulated Doors
- Windows: Insulated Windows
- Has basement: Yes
- Has fireplace: No
- Common walls with other units/homes: No One Above,2+ Common Walls
Interior area
- Total structure area: 803
- Total interior livable area: 803 sqft
- Finished area above ground: 803
Property
Parking
- Total spaces: 1
- Parking features: Detached, Garage Door Opener, Leased, Exclusive Parking
- Garage spaces: 1
Details
- Parcel number: 4745489
- Zoning: R1A
Construction
Type & style
- Home type: Condo
- Property subtype: Condominium, Duplex
- Attached to another structure: Yes
Materials
- Frame, Brick, Stone
- Roof: Rubber
Condition
- Year built: 2006
Utilities & green energy
- Electric: 110 Volts, Circuit Breakers
- Sewer: Public Sewer
- Water: Public
- Utilities for property: for Electric Range, for Electric Oven, for Electric Dryer, Washer Hookup, Icemaker Connection
Community & HOA
Community
- Features: Public Transportation, Shopping, Park, Walk/Jog Trails, Medical Facility, Bike Path, Conservation Area, Highway Access, House of Worship, Marina, Private School, Public School, T-Station, University
- Security: Intercom, Doorman, Security Gate, Concierge
HOA
- Amenities included: Hot Water, Elevator(s), Playground, Park, Recreation Facilities, Garden Area
- Services included: Heat, Gas, Water, Sewer, Insurance, Security, Maintenance Structure, Road Maintenance, Maintenance Grounds, Snow Removal, Trash
- HOA fee: $727 monthly
Location
- Region: Cambridge
Financial & listing details
- Price per square foot: $853/sqft
- Tax assessed value: $725,800
- Annual tax amount: $4,841
- Date on market: 1/17/2026
Price history
| Date | Event | Price |
|---|---|---|
| 12/30/2025 | Sold | $685,000-0.6%$853/sqft |
Source: MLS PIN #73456108 Report a problem | ||
| 11/25/2025 | Contingent | $689,000$858/sqft |
Source: MLS PIN #73456108 Report a problem | ||
| 11/19/2025 | Listed for sale | $689,000-8%$858/sqft |
Source: MLS PIN #73456108 Report a problem | ||
| 11/2/2025 | Listing removed | $749,000$933/sqft |
Source: MLS PIN #73412874 Report a problem | ||
| 8/2/2025 | Listed for sale | $749,000-6.3%$933/sqft |
Source: MLS PIN #73412874 Report a problem | ||
| 7/18/2025 | Listing removed | $799,000$995/sqft |
Source: MLS PIN #73372159 Report a problem | ||
| 6/11/2025 | Price change | $799,000-5.9%$995/sqft |
Source: MLS PIN #73372159 Report a problem | ||
| 5/9/2025 | Listed for sale | $849,000+7.5%$1,057/sqft |
Source: MLS PIN #73372159 Report a problem | ||
| 4/23/2025 | Listing removed | -- |
Source: Owner Report a problem | ||
| 11/27/2024 | Listed for sale | $790,000-1.1%$984/sqft |
Source: Owner Report a problem | ||
| 11/18/2024 | Listing removed | $799,000$995/sqft |
Source: MLS PIN #73295101 Report a problem | ||
| 9/26/2024 | Listed for sale | $799,000-9.2%$995/sqft |
Source: MLS PIN #73295101 Report a problem | ||
| 9/18/2024 | Listing removed | -- |
Source: Owner Report a problem | ||
| 9/8/2024 | Listed for sale | $880,000+46.7%$1,096/sqft |
Source: Owner Report a problem | ||
| 12/5/2020 | Listing removed | $2,495$3/sqft |
Source: Zillow Rental Manager Report a problem | ||
| 10/16/2020 | Listed for rent | $2,495+4%$3/sqft |
Source: Zillow Rental Manager Report a problem | ||
| 7/22/2019 | Sold | $600,000-4.6%$747/sqft |
Source: Public Record Report a problem | ||
| 7/8/2019 | Pending sale | $629,000$783/sqft |
Source: Compass #72500912 Report a problem | ||
| 6/28/2019 | Price change | $629,000-3.2%$783/sqft |
Source: Compass #72500912 Report a problem | ||
| 5/24/2019 | Listed for sale | $650,000$809/sqft |
Source: Compass #72500912 Report a problem | ||
| 5/19/2019 | Pending sale | $650,000$809/sqft |
Source: Compass #72500912 Report a problem | ||
| 5/15/2019 | Listed for sale | $650,000+77.1%$809/sqft |
Source: Compass #72500912 Report a problem | ||
| 4/5/2017 | Listing removed | $2,400-4%$3/sqft |
Source: Coldwell Banker Residential Brokerage - Boston-Back Bay #72090574 Report a problem | ||
| 11/4/2015 | Listing removed | $2,500$3/sqft |
Source: BZR Report a problem | ||
| 8/7/2015 | Listed for rent | $2,500$3/sqft |
Source: Club Realty #71888899 Report a problem | ||
| 12/5/2011 | Sold | $367,000$457/sqft |
Source: LINK #127835 Report a problem | ||
Public tax history
| Year | Property taxes | Tax assessment |
|---|---|---|
| 2025 | $4,390 +6% | $691,400 -1.2% |
| 2024 | $4,141 +6.6% | $699,500 +5.5% |
| 2023 | $3,885 -0.1% | $662,900 +0.9% |
| 2022 | $3,888 -4.3% | $656,700 -5.4% |
| 2021 | $4,061 +4.9% | $694,200 +3.1% |
| 2020 | $3,873 +1.4% | $673,600 +4.7% |
| 2019 | $3,821 +4.3% | $643,200 +10.5% |
| 2018 | $3,662 +4.3% | $582,200 +7.6% |
| 2017 | $3,510 +6.1% | $540,900 +14.3% |
| 2016 | $3,308 +1% | $473,200 +13% |
| 2015 | $3,275 +1.6% | $418,800 +8.9% |
| 2014 | $3,223 -0.8% | $384,600 +2.5% |
| 2013 | $3,248 +3.2% | $375,100 +1.1% |
| 2012 | $3,148 +3.9% | $371,200 |
| 2011 | $3,029 -3.4% | $371,200 -8.7% |
| 2010 | $3,137 | $406,400 |
Find assessor info on the county website
Neighborhood: East Cambridge
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Nearby schools
GreatSchools rating
- 5/10Kennedy-Longfellow SchoolGrades: PK-5Distance: 0.6 mi
- 8/10Vassal Lane Upper SchoolGrades: 6-8Distance: 0.6 mi
- 8/10Cambridge Rindge and Latin SchoolGrades: 9-12Distance: 1.9 mi
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Estimated market value
$690,100
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Estimated market value
$690,100
- Massachusetts
- Middlesex County
- Cambridge
- 02141
- East Cambridge
- 1 Earhart St Unit 725
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