Investment Analysis — 319 Beacon Street

Boston, MA 02116 — Back Bay

Based on HUD Small Area Fair Market Rent for Boston-Cambridge-Quincy, MA-NH HUD Metro FMR Area, a 7-bedroom in 02116 carries an estimated $5,520/mo in gross rent — about a -0.56% cap rate and $-55,068/yr in estimated NOI at the $9,900,000 list price. Adjust every assumption in the calculator below.

View Standard Listing

Beds

Baths

SqFt

6,528

Style

Single Family

Built

1871

319 Beacon Street is a stunning single-family residence offering impressive scale, refined finishes, and an outstanding layout for both grand entertaining and everyday living. Flooded with natural light from oversized windows, the residence features beautifully proportioned rooms with high ceilings, all connected by an elevator servicing every level. Elegant formal living and dining spaces provide a sophisticated setting for entertaining while maintaining a warm and inviting feel. A suburban-sized eat-in kitchen is outfitted with top-of-the-line appliances, custom cabinetry, and extensive storage. The expansive family room with a full bar opens to a spectacular oversized deck, creating an ideal indoor-outdoor setting for entertaining. Additional highlights include a home office and a private guest suite on the lower level. Atop it all is an incredible roof deck with sweeping city views. Complete with 2 garage and 1 outdoor parking space, all in a premier Back Bay location.

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 6,528 sq ft principal dwelling). Lot size: 2,744 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.

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