
12 Watertown St Lexington — Photo 1 of 42
$998,000
Investment Analysis — 12 Watertown St
Lexington, MA 02421
Based on HUD Small Area Fair Market Rent for Boston-Cambridge-Quincy, MA-NH HUD Metro FMR Area, a 3-bedroom in 02421 carries an estimated $5,040/mo in gross rent — about a 3.43% cap rate and $34,246/yr in estimated NOI at the $998,000 list price. Adjust every assumption in the calculator below.
Beds
3
Baths
2
SqFt
2,016
Style
Single Family
Built
1945
A wonderful opportunity for single-level living in a convenient Lexington location! This ranch-style home offers comfortable one-floor living, with generously sized bedrooms, including a spacious primary bedroom with en-suite bath. Abundant storage and a completely dry basement provide extra space for storage or future use. A gas line is connected to the house, offering added convenience and flexibility. The level backyard and enclosed porch create a wonderful setting for cooking, entertaining, family gatherings, and outdoor enjoyment. The home is within walking distance of Wilson Farm and directly across from the Bowman Park trail, with nearby bus service and everyday amenities adding to the convenience. A semi-circular driveway provides ample off-street parking, complemented by a one-car garage. For buyers with vision, the property offers potential for an in-law suite or accessory dwelling unit, as well as the possibility of adding a second floor. Create a home that truly reflects your style and needs.
ADU Potential
Massachusetts allows one accessory dwelling unit by right in single-family zoning districts statewide (M.G.L. c. 40A §3; 760 CMR 71.00, effective Feb 2025). Estimated maximum ADU size for this property: 900 sq ft (the lesser of 900 sq ft or half the 2,016 sq ft principal dwelling). Lot size: 12,530 sq ft.
Based on listing data, which indicates the property type — not the zoning district. Local dimensional, septic (Title 5), and historic-district requirements still apply. Not legal advice — verify with the municipality.
Estimates — not financial advice
These figures are illustrative estimates for informational purposes only — not an appraisal, valuation, or guarantee of rent, income, or returns, and not financial, tax, or investment advice. Rent is either the figure reported on the MLS listing — in-place rent that may differ from market and is not verified against the actual leases — or, where the listing reports none, an estimate from HUD Small Area Fair Market Rents, a government benchmark that may differ from actual market rent. Each figure is labelled with its source. Cap rate, NOI, and returns depend on the assumptions shown, which you can change. MLS and other third-party data may be inaccurate or out of date. Verify all figures independently and consult your own financial, tax, and legal advisors before making any investment decision.
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Property Details
Financials
Parking
Interior Specifications
Climate & Utilities
Building & Exterior
Property & Lot
Amenities & Appliances
Tankless Water Heater • Range • Dishwasher • Disposal • Refrigerator • Washer • Dryer
Neighborhood
Public Transportation • Shopping • Park • Walk/Jog Trails
Geography
Floorplan Breakdown
Structural Layout
Living Room
Lvl First27 x 11
Wood / Coal / Pellet Stove, Flooring - Hardwood, Window(s) - Picture, Recessed Lighting
Dining Room
Lvl First12 x 12
Flooring - Hardwood
Kitchen
Lvl First13 x 11
Ceiling Fan(s), Flooring - Stone/Ceramic Tile, Exterior Access, Recessed Lighting
Family Room
Lvl Basement29 x 11
Wet Bar, Recessed Lighting
Primary Bedroom
Lvl First14 x 11
Bathroom - Full, Walk-In Closet(s), Flooring - Hardwood
Bedroom 2
Lvl First15 x 11
Bedroom 3
Lvl First12 x 11
Closet, Flooring - Hardwood, Window(s) - Picture
Bathroom 1
Lvl FirstBathroom - Full, Bathroom - Tiled With Tub, Flooring - Stone/Ceramic Tile, Window(s) - Picture
Bathroom 2
Lvl FirstBathroom - Full, Bathroom - Tiled With Shower Stall, Flooring - Stone/Ceramic Tile, Window(s) - Picture
Property History
$998,000
Sep 16, 2026
MLS® 73578315
$439,000
Dec 31, 2010
MLS® 71134240
$439,000
Sep 9, 2010
MLS® 71134240
Listing Agent: Alina Wang Team
Listing Office: Coldwell Banker Realty - Lexington
MLS® Number: 73578315