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124 Days on market
11 Brown Street Cambridge — Photo 1 of 36

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.

View Standard Listing

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

Original Price$12,995,000
Annual Taxes$79,252

Parking

Garage2
Off-Street6

Interior Specifications

Total Rooms10
Fireplaces2
Flooring--
BasementFull, Finished, Walk-Out Access, Interior Entry

Climate & Utilities

HeatingForced Air, Heat Pump, Natural Gas, Hydro Air
CoolingHeat Pump
WaterPublic
SewerPublic Sewer

Building & Exterior

Construction--
RoofSlate, Rubber
FoundationConcrete Perimeter
ZoningA-2

Property & Lot

Acres0.34
SqFt Lot14,657
Lot FeaturesCul-De-Sac, Level

Neighborhood

Public Transportation • Shopping • Tennis Court(s) • Park • Walk/Jog Trails • Medical Facility

Geography

Floorplan Breakdown

Structural Layout

Second
Master BedroomBedroom 2Bedroom 3Bedroom 4
First
Living RoomDining RoomKitchenFamily RoomBedroom 5
Living Room
Lvl First
Dining Room
Lvl First
Kitchen
Lvl First
Family Room
Lvl First
Master Bedroom
Lvl Second
Bedroom 2
Lvl Second
Bedroom 3
Lvl Second
Bedroom 4
Lvl Second
Bedroom 5
Lvl First

Property History

Listed
$12,995,000

May 11, 2026

MLS® 73516411

Terminated
$14,450,000

Nov 25, 2025

MLS® 73343401

Listed
$14,450,000

Mar 10, 2025

MLS® 73343401

Terminated
$16,495,000

Nov 26, 2024

MLS® 73239507

Listed
$16,495,000

May 16, 2024

MLS® 73239507

Listing Provided By

Listing Agent: Beth Dickerson

Listing Office: Gibson Sotheby's International Realty

MLS® Number: 73516411