209 Waltham St Lexington — Photo 1 of 41
$2,850,000
Investment Analysis — 209 Waltham St
Lexington, MA 02421
Based on HUD Small Area Fair Market Rent for Boston-Cambridge-Quincy, MA-NH HUD Metro FMR Area, a 5-bedroom in 02421 carries an estimated $5,560/mo in gross rent — about a 0.69% cap rate and $19,633/yr in estimated NOI at the $2,850,000 list price. Adjust every assumption in the calculator below.
Beds
5
Baths
4
SqFt
5,024
Style
Single Family
Built
1905
Set in the heart of Lexington, just a short distance from Lexington Center, 209 Waltham Street is beautifully appointed throughout, striking an exceptional balance of classic New England charm and modern craftsmanship. An expansive farmer’s porch welcomes you into warm, inviting living spaces with an effortless flow between the living, dining, and kitchen areas. The family room, anchored by a fireplace, opens to a covered porch with a stunning wood-paneled ceiling—an inviting extension of the home for entertaining, relaxing, and everyday living. A sun-filled office/sunroom wrapped in windows offers flexible space for work, reading, or quiet retreat. Additional flexible space offers excellent potential for a guest suite, along with abundant storage. With 5 bedrooms, 3 full and 2 half baths and professionally designed grounds that create a beautiful setting for outdoor living, entertaining, and play, this exceptional property offers a rare combination of space, character, and convenience, with easy access to Route 2 and Cambridge/Boston.
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 5,024 sq ft principal dwelling). Lot size: 25,954 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.
Open Houses
Property Details
Financials
Parking
Interior Specifications
Climate & Utilities
Building & Exterior
Property & Lot
Amenities & Appliances
Tankless Water Heater • Range • Dishwasher • Disposal • Microwave • Refrigerator • Washer • Dryer
Neighborhood
Public Transportation • Shopping • Pool • Tennis Court(s) • Park • Walk/Jog Trails
Geography
Floorplan Breakdown
Structural Layout
Living Room
Lvl First13.11 x 18.11
Flooring - Hardwood, French Doors, Lighting - Overhead
Dining Room
Lvl First14 x 13.3
Flooring - Hardwood, French Doors, Lighting - Pendant
Kitchen
Lvl First14 x 15.8
Flooring - Hardwood, Dining Area, Pantry, Countertops - Stone/Granite/Solid
Office
Lvl Third21.9 x 23.6
Closet, Flooring - Hardwood
Family Room
Lvl First15.2 x 36
Flooring - Hardwood, Window(s) - Picture, Open Floorplan, Lighting - Overhead
Master Bedroom
Lvl Second15.5 x 21.9
Bathroom - Full, Bathroom - Double Vanity/Sink, Ceiling Fan(s), Walk-In Closet(s), Flooring - Hardwood
Bedroom 2
Lvl Second14.3 x 12.2
Bedroom 3
Lvl Second14 x 16.3
Closet, Flooring - Hardwood
Bedroom 4
Lvl Second13.1 x 13.1
Closet, Flooring - Hardwood
Bedroom 5
Lvl Third14 x 13.1
Bathroom - Full, Closet, Flooring - Hardwood
Bathroom 1
Lvl First9.1 x 5.11
Bathroom - Half, Flooring - Stone/Ceramic Tile
Bathroom 2
Lvl Second10.9 x 7.1
Bathroom - Full, Bathroom - Double Vanity/Sink, Flooring - Stone/Ceramic Tile
Bathroom 3
Lvl Second10.2 x 6.11
Bathroom - Full, Flooring - Stone/Ceramic Tile
Property History
$2,850,000
Aug 27, 2026
MLS® 73569148
$2,999,500
Aug 27, 2026
MLS® 73495764
$2,999,500
Apr 8, 2026
MLS® 73495764
Listing Agent: Keri Caron
Listing Office: William Raveis R.E. & Home Services
MLS® Number: 73569148