
4 Gloucester Street Boston — Photo 1 of 32
$17,675,000
Investment Analysis — 4 Gloucester Street
Boston, MA 02115 — Back Bay
Based on HUD Small Area Fair Market Rent for Boston-Cambridge-Quincy, MA-NH HUD Metro FMR Area, a 7-bedroom in 02115 carries an estimated $4,410/mo in gross rent — about a -0.32% cap rate and $-57,088/yr in estimated NOI at the $17,675,000 list price. Adjust every assumption in the calculator below.
Beds
7
Baths
7
SqFt
9,924
Style
Single Family
Built
1870
Featured in The Wall Street Journal’s Mansion section, this nearly 10,000 SF Back Bay townhouse blends contemporary design with classical character across five full floors. With seven bedrooms, six full baths, and two half baths, it offers a thoughtful layout for everyday family life and entertaining. Its unusually wide footprint allows for generous rooms, while light from three sides gives the home an airy feel. A marble foyer leads to a chef’s kitchen, sunlit family room, dining room, and expansive living room, where soaring ceilings, floor-to-ceiling windows, and fireplaces bring warmth and scale. The second floor is anchored by a primary suite with a fireplace, dual dressing rooms, and a spa-inspired bath with a soaking tub and glass rain shower. An office or nursery and a dedicated laundry room add flexibility and convenience. The third floor features four oversized bedrooms and two full baths, giving children or guests a space of their own. On the top floor, a bright living or game room offers space for movie nights, entertaining, or a quiet evening in. This level also includes a kitchen, full bath, and roof access with potential for a private roof deck. The garden level adds flexibility and function, with a home gym, a two-bedroom, two-bath suite with its own kitchen for extended family or guests, an office with a fireplace, laundry, a private patio, and abundant storage. A large elevator serves every level, and four direct parking spaces complete the home. With room to gather, retreat, and grow, this home offers a rare kind of townhouse living in the heart of Back Bay.
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 9,924 sq ft principal dwelling). Lot size: 2,520 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 • Freezer • Washer • Dryer
Neighborhood
Public Transportation • Shopping • Tennis Court(s) • Park • Walk/Jog Trails • Medical Facility
Geography
Property History
$17,675,000
Sep 30, 2026
MLS® 73584705
$18,885,000
Jul 26, 2026
MLS® 73481876
$18,885,000
Mar 3, 2026
MLS® 73481876
$18,885,000
Nov 23, 2025
MLS® 73295924
$18,885,000
Sep 27, 2024
MLS® 73295924
Listing Agent: Maggie Gold Seelig
Listing Office: MGS Group Real Estate LTD
MLS® Number: 73584705









