
11 Brown Street Cambridge — Photo 1 of 36
$12,995,000
Investment Analysis — 11 Brown Street
Cambridge, MA 02138 — Harvard Square
Based on HUD Small Area Fair Market Rent for Boston-Cambridge-Quincy, MA-NH HUD Metro FMR Area, a 6-bedroom in 02138 carries an estimated $5,600/mo in gross rent — about a -0.22% cap rate and $-28,180/yr in estimated NOI at the $12,995,000 list price. Adjust every assumption in the calculator below.
Beds
6
Baths
6.5
SqFt
7,258
Style
Single Family
Built
2024
A masterpiece by Cafasso Design Group, this architectural work of art redefines luxury living. Tucked within a coveted enclave off Brattle Street, this home unfolds across lush, sculpted grounds framed by mature trees, offering an unparalleled serene retreat. A striking sculptural staircase serves as the dramatic centerpiece, while interiors masterfully blend contemporary Japanese, Scandinavian, Italian, and French influences.The eat-in chef’s kitchen features custom Italian walnut cabinetry, Calacatta Gold marble counters, dual sinks & dishwashers, a Gaggenau 400 Series double oven, and walls of glass. Generous bedrooms and spa-inspired baths deliver sanctuary, complemented by a glass-enclosed office and a family room featuring a floating gas fireplace. A dedicated lifestyle level boasts a gym, guest suite, and inviting spa with a Western Red Cedar sauna & steam shower. Outside, manicured grounds surround an outdoor kitchen, expansive deck, and inviting patio perfect for entertaining. You won't believe whats behind the front door!
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 7,258 sq ft principal dwelling). Lot size: 14,657 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
Neighborhood
Public Transportation • Shopping • Tennis Court(s) • Park • Walk/Jog Trails • Medical Facility
Geography
Floorplan Breakdown
Structural Layout
Living Room
Lvl FirstDining Room
Lvl FirstKitchen
Lvl FirstFamily Room
Lvl FirstMaster Bedroom
Lvl SecondBedroom 2
Lvl SecondBedroom 3
Lvl SecondBedroom 4
Lvl SecondBedroom 5
Lvl FirstProperty History
$12,995,000
May 11, 2026
MLS® 73516411
$14,450,000
Nov 25, 2025
MLS® 73343401
$14,450,000
Mar 10, 2025
MLS® 73343401
$16,495,000
Nov 26, 2024
MLS® 73239507
$16,495,000
May 16, 2024
MLS® 73239507
Listing Agent: Beth Dickerson
Listing Office: Gibson Sotheby's International Realty
MLS® Number: 73516411
