Condominium at 21 Keith St # 2, Watertown MA 02472
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$1,249,000

21 Keith St # 2, Watertown MA 02472
Watertown, MA 02472
Listed by Nathan Long
Bedrooms
3
Bathrooms
3.5
Living area
2,136 sqft
Year built
2026

About this home

Experience modern living in this newly constructed townhouse located in the highly sought-after Mount Auburn/East Watertown neighborhood, just steps from the Cambridge line. Enjoy easy access to Harvard Sq., Arsenal Yards, &public transportation, w #73 bus to Harvard Sq. only moments away. Nestled on a quiet residential street, this three-level home offers a bright, open, & thoughtfully designed floor plan. The main level features a spacious open-concept kitchen, dining, and living area. The living room opens directly to a rear porch and private backyard. The upper level includes two luxurious primary suites, each w walk-in closets. The rear suite boasts a private balcony overlooking the backyard. A versatile bonus room & convenient laundry room complete this floor. The lower level provides additional living space with a generously sized bedroom, a full bathroom featuring vanities, and a comfortable family room.

Property details

MLS
MLS Property Information Network
MLS #
73579006
Property type
Condominium
Subdivision
N/A
Status
Active
Days on market
36
On market date
September 17, 2026
Stories
3
Total bathrooms
3.5
Garage spaces
N/A
Parking spaces
3
Lot size
0.14 acres
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Nearby schools

Within 10 miles. School directory data from the National Center for Education Statistics (NCES), accessed via the Urban Institute Education Data API. Local Score is calculated by INNOVATE Real Estate; where a state rating is shown, it comes from that state's own official school report card.

Elementary
Haggerty
0.33 mi away · Grades -1-5
Nearest school -- attendance-zone data not available here
5.0
Local Score (student-teacher ratio only (preliminary -- will incorporate state test-score data once available)) -- not an official state rating
Enrollment
236
Student:teacher ratio
8.4:1
District
Cambridge
Middle
Winthrop L Chenery Middle
1.04 mi away · Grades 5-8
Nearest school -- attendance-zone data not available here
3.0
Local Score (student-teacher ratio only (preliminary -- will incorporate state test-score data once available)) -- not an official state rating
Enrollment
1,362
Student:teacher ratio
15.8:1
District
Belmont
High
Watertown High
1.13 mi away · Grades 9-12
Nearest school -- attendance-zone data not available here
5.0
Local Score (student-teacher ratio only (preliminary -- will incorporate state test-score data once available)) -- not an official state rating
Enrollment
705
Student:teacher ratio
9.5:1
District
Watertown

Walkability

Blended score for Watertown's center, calculated by INNOVATE Real Estate from two sources: the EPA's National Walkability Index (street network, transit, land-use mix) and Google Places amenity data (what's actually reachable on foot from this point). 60% EPA National Walkability Index + 40% nearby-amenity density (Google Places).

87
Highly walkable
out of 100
EPA National Walkability Index
15.7 / 20 -- Most walkable
Google Places amenity density
100 / 100
Restaurants & cafes20
Grocery stores10
Parks20
Schools20
Transit stops20
Pharmacies6

Market position

How this listing compares to current activity in Watertown, from live MLS data.

On the market 36 days -- 49 fewer days than Watertown's current average of 85 days.
For reference, the median list price across 362 active listings in Watertown right now is $5,475.

Mortgage calculator

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Est. monthly payment
$7,672/mo
$249,800 down
$999,200 loan
Principal & interest$6,481
Property tax (est.)$1,041
Home insurance (est.)$150

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Data source: Listing information provided by MLS Property Information Network via Trestle/CoreLogic. Last updated September 21, 2026.

Information herein deemed reliable but not guaranteed; all measurements, school assignments, HOA fees, taxes, and feature lists are approximate and should be independently verified. Equal Housing Opportunity.