10 William St, Unit 45

950 Sq. Ft.
$441 / Sq. Ft.
950
Sq. Ft.
$441
per Sq. Ft.

Description

Fabulous opportunity to own this 2bed/1bath condo on the Watertown-Newton line! This 4th floor corner unit offers an open dining/living space, with sliders out to the north-facing balcony, a well-maintained kitchen, an updated bath and two gracious-sized bedrooms. Excellent closet space throughout with 6 closets! Storage space and one-car garage space. Professionally managed complex with laundry, bike storage, community room and a pool. Best of all, all in an incredible location – two blocks away...Fabulous opportunity to own this 2bed/1bath condo on the Watertown-Newton line! This 4th floor corner unit offers an open dining/living space, with sliders out to the north-facing balcony, a well-maintained kitchen, an updated bath and two gracious-sized bedrooms. Excellent closet space throughout with 6 closets! Storage space and one-car garage space. Professionally managed complex with laundry, bike storage, community room and a pool. Best of all, all in an incredible location – two blocks away from the beautiful tree-lined trails along the Charles, plus minutes to Newton Corner, Watertown Square & the vibrant Arsenal Yards for shopping, dining and coffee shops. Commuter-friendly with easy access to Boston - the express buses, Mass Pike & Storrow Drive all right there! Must see.
  1. Listed by Fleet Homes Group • Keller Williams Realty
  2. Listed by Melanie K. Fleet • Keller Williams Realty

Property Details for 10 William Street, Unit 45

Town
Watertown
Area
MA-Watertown
Style
Mid-Rise
Garage Spaces
1
Parking Spaces
1.00
Parking Spaces Total
2
Unit Placement
Upper, Corner
LISTING UPDATED: 02/20/2026 10:22 AM

Property Details for 10 William Street, Unit 45

StatusActive
MLS #73470106
Days on Market32
Taxes$5,136 / year
HOA Fees$629 / month
Compass TypeCondo
MLS TypeCondominium/Co-Op / Condo
Year Built1973
CountyMiddlesex County

Location

Listing Courtesy of Keller Williams Realty, Fleet Homes Group; Keller Williams Realty, Melanie K. Fleet
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Building Information for 10 William Street, Unit 45

Building/ComplexNewtown At GatewayFloor4Stories1Residences140Pet PolicyAllowedPet Policy Details-Year Built1973

Payment Calculator

$3,099 per month

30 year fixed, 6.15% Interest

Principal and Interest

$2,042

Property Taxes

$428

HOA Dues

$629

The Payment Calculator is for illustrative purposes only.

Property Information for 10 William Street, Unit 45

General Details
Property Details
  • Association Amenities: Hot Water, Pool, Laundry, Elevator(s), Sauna/Steam, Storage
  • Building Area Units: Square Feet
  • Community Features: Public Transportation, Shopping, Swimming Pool, Park, Walk/Jog Trails, Medical Facility, Conservation Area, Highway Access, House of Worship, Public School, T-Station, University
  • Living Area: 950.0
  • SqFt with Basement: No
  • Total Units: 140
  • Property Attached: Yes
  • Type of Condo: Condo
  • Waterfront: No
  • Year Built Details: Actual
  • Year Built Source: Public Records
Features
Interior Features
  • Appliances: Range, Dishwasher, Disposal, Refrigerator, Range Hood
  • Basement Features: N
  • Common Walls: Corner
  • Num of Baths: 1.0
  • Num of Full Baths: 1
  • Num of Half Baths: 0
  • Bathrooms Total Decimal: 1.00
  • Bathrooms Total Integer: 1
  • FireplaceYN: No
  • Fireplaces: 0
  • Interior Features: Intercom
  • Laundry Features: Common Area, In Building
  • SpaYN: No
Exterior Features
  • Construction: Brick
  • Entry Location: Upper
  • Exterior Features: Balcony
  • Exterior Features: Pool - Inground, Balcony
  • Pool Features: Association, In Ground
  • Structure Type: Mid-Rise
Parking Features
  • Attached Garage: Yes
  • Carport: No
  • Covered Spaces: 1.00
  • Garage: Yes
  • Garage Parking: Attached, Under, Heated, Off-Street, Assigned, Improved Driveway
  • Open Parking: Yes
  • Parking Features: Attached, Under, Heated, Off-Street, Assigned, Improved Driveway
  • Parking Features: Heated, Off-Street, Assigned, Improved Driveway
Utilities
  • Cooling: Wall AC
  • Cooling: Yes
  • Heating: Baseboard, Natural Gas
  • Heating: Yes
  • Sewer: City/Town Sewer
  • Utility Connections: for Electric Range
  • Water: Public
Property Information
Property Info
  • Year Round: Yes
  • Documents Available: Master Deed, Rules & Regs, Management Association Bylaws, Association Financial Statements
  • Documents Count: 4
  • Farm Land Area Units: Square Feet
  • WARRANTY: No
  • Lot Size Units: Acres
  • Disclosures: Total of 1 parking space (garage). No dogs; cats w/ permission (rules & regs attached). Rentals must be 1 year+. The association canceled the previously planned special assessments; new board will be evaluating future maintenance work. A portfolio lender likely required. See agent for more info.
Tax Information
  • Tax ID: M:0102 B:0012 L:1091,846917
  • Assessments: $439,700
  • Book: 128
  • Tax Year: 2025
  • Zoning: R1.2
Building / Association Information
Living Characteristics
  • Beds Total: 2
  • Total Living Levels: 1
Other Building Characteristics
  • Cooling Zones: 2
  • Heat Zones: 1
Complex & Association Information
  • Association Fee Frequency: Monthly
  • Association Fee Includes: Heat, Water, Sewer, Insurance, Maintenance Structure, Maintenance Grounds, Snow Removal, Trash, Reserve Funds
  • Complex Name: Newtown At Gateway
  • Complex Complete: Yes
  • Management: Professional - On Site, Professional - Off Site
  • Association Security: Intercom
  • Adult Community: No
Unit Information
Unit Information
  • Unit Building: 45
  • Unit Floor Level Integer: 4.0

Property History for 10 William Street, Unit 45

DateEvent & SourcePriceAppreciation
Jan 20, 2026

Listed (Active)

MLS PIN #73470106

$419,000
Oct 10, 2025

Expired

MLS PIN #73358317

$439,000
Jul 22, 2025

Temporarily Withdrawn

MLS PIN #73358317

$449,000
Jul 22, 2025

Temporarily Withdrawn

MLS PIN #73358317

$439,000
Apr 25, 2025

Price Change

MLS PIN #73358317

$449,000
Apr 10, 2025

Listed (Active)

MLS PIN #73358317

$479,000
Jun 18, 2015

Sold (Public Record)

Public Record #550995450

$343,500

+4.8% / yr

May 18, 2015

Sold

MLS PIN #71832649

$343,500
May 11, 2015

Under Agreement

MLS PIN #71832649

May 11, 2015

Contingent

MLS PIN #71832649

May 7, 2015

Listed (Active)

MLS PIN #71832649

$339,000
Jul 2, 2009

Sold (Public Record)

Public Record #271751635

$260,000

-4.2% / yr

Jul 2, 2009

Sold

MLS PIN #70890716

$260,000
May 9, 2009

Contingent

MLS PIN #70890716

Mar 20, 2009

Listed (Active)

MLS PIN #70890716

$279,000
Apr 7, 2005

Sold (Public Record)

Public Record #156802255

$312,000
Apr 6, 2005

Sold

MLS PIN #70149394

$312,000
Mar 7, 2005

Under Agreement

MLS PIN #70149394

Mar 7, 2005

Contingent

MLS PIN #70149394

Feb 22, 2005

Listed (Active)

MLS PIN #70149394

$319,000
DateEvent & SourcePrice
01/20/2026

Listed (Active)

MLS PIN #73470106

$419,000
10/10/2025

Expired

MLS PIN #73358317

$439,000
07/22/2025

Temporarily Withdrawn

MLS PIN #73358317

$449,000
07/22/2025

Temporarily Withdrawn

MLS PIN #73358317

$439,000
04/25/2025

Price Change

MLS PIN #73358317

$449,000
04/10/2025

Listed (Active)

MLS PIN #73358317

$479,000
06/18/2015

Sold (Public Record)

Public Record #550995450

$343,500

+4.8% / yr

05/18/2015

Sold

MLS PIN #71832649

$343,500
05/11/2015

Under Agreement

MLS PIN #71832649

05/11/2015

Contingent

MLS PIN #71832649

05/07/2015

Listed (Active)

MLS PIN #71832649

$339,000
07/02/2009

Sold (Public Record)

Public Record #271751635

$260,000

-4.2% / yr

07/02/2009

Sold

MLS PIN #70890716

$260,000
05/09/2009

Contingent

MLS PIN #70890716

03/20/2009

Listed (Active)

MLS PIN #70890716

$279,000
04/07/2005

Sold (Public Record)

Public Record #156802255

$312,000
04/06/2005

Sold

MLS PIN #70149394

$312,000
03/07/2005

Under Agreement

MLS PIN #70149394

03/07/2005

Contingent

MLS PIN #70149394

02/22/2005

Listed (Active)

MLS PIN #70149394

$319,000

For completeness, Compass often displays two records for one sale: the MLS record and the public record.

Public Records for 10 William Street, Unit 45

Taxable ValueLand-Additions$439,700Total-
Tax Record2025$5,136 ($428 / month)
Home Facts
Beds2Baths1Total Finished SqFt950 SqFtAbove Grade Finished SqFt950 SqFtStories1StyleCondominiumYear Built1973ZoningR1.2CountyMIDDLESEXAPNWATE M:0102 B:0012 L:1091

Schools near 10 William Street, Unit 45

This home is within Watertown School District.
Rating
School
Type
Grades
Distance
Public - PK to 5
Public - 6 to 8
Public - 9 to 12
Public - K to 5
Rating
School
Distance
Hosmer Elementary School
PublicPK to 5

Watertown Middle School
Public6 to 8

Watertown High School
Public9 to 12

J.R. Lowell Elementary School
PublicK to 5

School ratings and boundaries are provided by GreatSchools.org and Pitney Bowes. This information should only be used as a reference. Proximity or boundaries shown here are not a guarantee of enrollment. Please reach out to schools directly to verify all information and enrollment eligibility.

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10 William Street, Unit 45 is a condo for sale in Watertown, MA 02472. This property was listed for sale on January 20, 2026 by Keller Williams Realty, it's currently listed at $419,000. It has been on the market for a total of 32 days and was last sold on June 18, 2015. This listing's school district is Watertown School District. Nearby schools include Hosmer Elementary School, Watertown Middle School and Watertown High School. 10 William Street, Unit 45 is a 2-bed, 1-bath, 950 sqft condo built in 1973.

No guarantee, warranty or representation of any kind is made regarding the completeness or accuracy of descriptions or measurements (including square footage measurements and property condition), such should be independently verified, and Compass, Inc., its subsidiaries, affiliates and their agents and associated third parties expressly disclaims any liability in connection therewith. Photos may be virtually staged or digitally enhanced and may not reflect actual property conditions. Offers of compensation are subject to change at the discretion of the seller. No financial or legal advice provided. Equal Housing Opportunity.

Listing Courtesy of Keller Williams Realty, Fleet Homes Group; Keller Williams Realty, Melanie K. Fleet

The property listing data and information, or the images, set forth herein were provided to MLS Property Information Network, Inc., Martha's Vineyard MLS, CCIMLS, Link MLS, and Berkshire County Board of REALTORS from third party sources, including sellers, lessors and public records, and were compiled by MLS Property Information Network, Inc., Martha's Vineyard MLS, CCIMLS, Link MLS, and Berkshire County Board of REALTORS. The property listing data and information, and the images, are for the personal, non-commercial use of consumers having a good faith interest in purchasing or leasing listed properties of the type displayed to them and may not be used for any purpose other than to identify prospective properties which such consumers may have a good faith interest in purchasing or leasing. MLS Property Information Network, Inc., Martha's Vineyard MLS, CCIMLS, Link MLS, and Berkshire County Board of REALTORS and its subscribers disclaim any and all representations and warranties as to the accuracy of the property listing data and information, or as to the accuracy of any of the images, set forth herein.