309 Main St, Watertown MA 02472 - Preview 1 309 Main St, Watertown MA 02472 - Preview 2

309 Main St, Watertown MA 02472

Watertown, MA 02472
$2,800,000
Est. $18,599/month
Estimate assumptions

20% down, a 30-year loan at 6.5%, and $200/month estimated insurance.

Includes the supplied property-tax and HOA inputs; missing inputs contribute $0. HOA fees with an unspecified frequency are treated as monthly. PMI and closing costs are excluded.

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12,646
Sq Ft
$221
Price/Sq Ft
0.49
Acres
1950
Year Built
16 minutes
Time on Market
For Sale Listed Oct 9, 2026 • MLS# 73589061 Copied! • Updated Oct 9, 2026

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About this home

Offered for the first time in a generation. 12,646 sq.ft. single story building on busy Main Street just outside Watertown Square. Building is currently leased to three individual tenants, each with separate entries and dedicated gas & electric. Owner-User opportunity with 5,300 sq.ft. potentially available in Q3 2027. Contact broker for financial details and lease information - confidentiality agreement required.

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A free agent CMA factors in condition, upgrades, and the street — the things comps alone can't see.

Recently Sold Nearby

Property History

Property Timeline

🏠
Listed for Sale
Oct 9, 2026
$2,800,000
Original listing
Agent: John Nealon Office: W. J. Nealon Commercial Realty, Inc.

Tax History

Year Taxes Assessment
2026 $50,883 —

Financial Details

Annual Property Tax
$50,883
Tax Year 2026

Facts & Features

Home Facts

Type Commercial Sale
Year Built 1950
Living Area 12,646 sq ft
Lot Size 0.49 acres
Heating None
Cooling None
Flooring None
Appliances None
Fireplace None
Basement None
Laundry None
Features None
Construction None
Architecture None
Roof None
Features None
Pool None
Spa None
Fencing None
Patio/Porch None
Features None

Utilities

Electric None
Water None
Sewer None
Gas None
Other Public Water, Public Sewer, Natural Gas Available

Financial

Annual Tax $50,883
Fee Includes None
Amenities None
Optional Fee Includes None
Seller Disclosures None
Possession None
Accepted Financing None
Structure Type []
Documents None
County Middlesex

Property Overview

Listing Type
For Sale
Year Built
1950
Living Area
12,646 sq ft

Floor Layout

Interior Features

Flooring:
Appliances:
Interior Features:
Windows:
Basement:
Laundry:
Security:

Construction & Materials

Year Built: 1950
Structure Type:
Exterior Materials:
Roof:
Foundation:

Heating, Cooling & Utilities

Heating:
Cooling:
Hot Water:
Water Source:
Sewer:
Energy Features:

Exterior & Lot

Exterior Features:
Patio & Porch:
Fencing:
Other Structures:
Lot Features:
Road Surface:

Parking & Garage

Parking Features:
School District
Watertown School District local
A-
✓ School Safety 2024-25
1.0% Low
0.8% Suspensions 0.2% In-School 0.2% Emergency
↓ 4.5% below state avg
E

Elementary Schools

8 schools
Perkins School for the Blind
0.9 mi
Grades PK-12
Jewish Community Day School
1.0 mi
Grades K-08
Atrium School
1.2 mi
Grades K-06
Star Academy (Watertown Campus)
2.0 mi
Grades PK-12
A
Cunniff School
0.6 mi | #158 of 825 | Score: 56.6
Improved 28 spots from last year
-1.6 below state avg
373 students Diverse
Rising School Diverse Student Body Strong Attendance
Grades PK-05
A
Hosmer School
1.1 mi | #131 of 825 | Score: 57.5
Improved 121 spots from last year
-0.7 below state avg
693 students Diverse
Rising School Diverse Student Body Strong Attendance
Grades PK-05
St. Stephen's Armenian School
1.7 mi
Grades PK-05
A+
James Russell Lowell School
890.6 mi | #81 of 825 | Score: 60.3
Improved 83 spots from last year
+2.1 above state avg
458 students Diverse
Rising School Diverse Student Body Strong Attendance
Grades PK-05
M

Middle Schools

1 school
B+
Watertown Middle School
0.2 mi | #110 of 352 | Score: 48.5
Improved 9 spots from last year
-9.8 below state avg
591 students Diverse
Diverse Student Body
Grades 06-08
H

High Schools

2 schools
Walker Beacon School
0.8 mi
Grades 07-12
B+
Watertown High School
0.2 mi | #107 of 346 | Score: 60.1
Improved 123 spots from last year
+1.9 above state avg
728 students Diverse
18 sports • 1,578 athletes
Strong AP Program High Graduation Rate Rising School Career Tech Programs
Grades 09-12
Learn about these ratings
School data provided by BMN Schools

Monthly Payment Calculator

Monthly Payment
$0
Principal, interest, taxes & insurance
Loan Amount
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After down payment
Total Interest
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Over life of loan
Total Cost
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Including down payment
%
Down: $0
%

Monthly Payment Breakdown

Principal & Interest $0
Property Tax $4,240
Homeowners Insurance $200
PMI (if <20% down) $0

Loan Summary

Total of 360 payments $0
Total principal paid $0
Total interest paid $0

Rate Impact

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Current Rate
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+0.5% Rate
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Cost $0/mo

Payment Over Time

Interest
Principal
Year 1
95% Interest
Year 15
50/50
Year 30
95% Principal
* Estimates only. Actual payments may vary. Consult with a lender for accurate figures.

Location

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Neighborhood

309 Main St, Watertown MA 02472

Watertown, MA 02472

Listing Information

Listing Agent John Nealon
Listing Office W. J. Nealon Commercial Realty, Inc.
Office Phone 617-926-1110
Agent MLS ID NB112111
Office MLS ID NB2551
Listing Data Updated Oct 9, 2026 2:56 PM EDT
Listing information is deemed reliable but not guaranteed. Data provided by MLS Property Information Network, Inc. All information should be independently verified.

Contact Us

Steve Novak Real Estate
Steve Novak Real Estate
BMN Boston Powered by SERHANT
mail@steve-novak.com
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