172 Brattle Street Cambridge — Photo 1 of 42
Recent Drop: $1,100,000
$15,700,000
Investment Analysis — 172 Brattle Street
Cambridge, MA 02138
Based on HUD Small Area Fair Market Rent for Boston-Cambridge-Quincy, MA-NH HUD Metro FMR Area, a 7-bedroom in 02138 carries an estimated $5,600/mo in gross rent — about a -0.13% cap rate and $-20,406/yr in estimated NOI at the $15,700,000 list price. Adjust every assumption in the calculator below.
Beds
7
Baths
8.5
SqFt
7,737
Style
Single Family
Built
1880
Modern luxury meets history in this completely renovated home on coveted Brattle St in Harvard Square. Completely transformed by a local respected builder, this property seamlessly blends historic charm w/ modern convenience in its impeccable design and finishes. The main floor offers a grand staircase, high ceilings, spacious living and dining rooms, chef's kitchen w/ top appliances and adjacent family room, an oversized mudroom off the attached garage and 2 half baths. The 2nd level has a luxurious primary suite w/ spa-like bath and gracious dressing room, 5 ensuite bedrooms (or offices) and a large laundry room. The top floor hosts a versatile office/loft space and a half bath. The lower level is fully equipped w/ a gym, game room, family room, full bath, ample storage and guest suite w/ direct exterior access. The outdoor and indoor spaces blend seamlessly for easy living, w/ a spacious patio and beautiful yard designed by a celebrated landscape architect. A true Harvard Square gem
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 7,737 sq ft principal dwelling). Lot size: 14,826 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.
Property Details
Financials
Parking
Interior Specifications
Climate & Utilities
Building & Exterior
Property & Lot
Amenities & Appliances
Gas Water Heater • Range • Dishwasher • Disposal • Microwave • Refrigerator • ENERGY STAR Qualified Refrigerator • Wine Refrigerator • ENERGY STAR Qualified Dishwasher • Range Hood • Instant Hot Water
Neighborhood
Public Transportation • Shopping • Tennis Court(s) • Park • Walk/Jog Trails • Sidewalks
Geography
Property History
$15,700,000
Was $16,800,000
Sep 26, 2025
MLS® 73342079
$16,800,000
Mar 6, 2025
MLS® 73342079
Listing Agent: Maggie Gold Seelig
Listing Office: MGS Group Real Estate LTD
MLS® Number: 73342079
