399 Plain Street Marshfield — Photo 1 of 15
Recent Drop: $14,000
$535,000
Investment Analysis — 399 Plain Street
Marshfield, MA 02050
Based on HUD Small Area Fair Market Rent for Boston-Cambridge-Quincy, MA-NH HUD Metro FMR Area, a 3-bedroom in 02050 carries an estimated $3,080/mo in gross rent — about a 4.41% cap rate and $23,610/yr in estimated NOI at the $535,000 list price. Adjust every assumption in the calculator below.
Beds
3
Baths
2
SqFt
1,118
Style
Single Family
Built
1967
Welcome to 399 Plain Street! This home is a fantastic opportunity to own a charming Cape in one of Marshfield’s most desirable locations. Full of character and endless potential this 3 bedroom, 2 bath home is ready for its next chapter. Whether you’re a contractor, handy homeowner or buyer eager to create your dream home, this is an incredible opportunity to build equity. The home is being sold in its current condition and will require repairs, updates and modernization. Many of the biggest investments have already been completed including a 3 bedroom septic system installed in 2020, updated bathrooms, newer interior paint and more. Enjoy a private backyard, one car garage and easy access to beaches, shopping, restaurants, top rated schools and Route 3. Bring your vision and transform this South Shore gem into your forever home.
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: 559 sq ft (the lesser of 900 sq ft or half the 1,118 sq ft principal dwelling).
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 • Tankless Water Heater • Range • Refrigerator • Washer • Dryer
Neighborhood
Shopping • Tennis Court(s) • Park • Walk/Jog Trails • Golf • Medical Facility
Geography
Floorplan Breakdown
Structural Layout
Living Room
Lvl Main,First10 x 21
Flooring - Hardwood
Dining Room
Lvl Main,First6 x 13
Beamed Ceilings, Flooring - Vinyl, French Doors, Deck - Exterior, Exterior Access, Wainscoting, Lighting - Sconce, Decorative Molding
Kitchen
Lvl Main,First13 x 10
Bathroom - Full, Closet, Flooring - Vinyl, Dining Area, French Doors, Deck - Exterior, Exterior Access, Stainless Steel Appliances, Gas Stove, Lighting - Pendant, Archway
Primary Bedroom
Lvl Main,First9 x 11
Closet, Flooring - Hardwood
Bedroom 2
Lvl Second9 x 16
Bedroom 3
Lvl Second10 x 16
Closet, Flooring - Hardwood
Bathroom 1
Lvl Main,First8 x 4
Bathroom - 3/4, Bathroom - With Shower Stall, Flooring - Vinyl, Wainscoting, Lighting - Sconce, Pedestal Sink, Decorative Molding
Bathroom 2
Lvl Second6 x 6
Bathroom - Tiled With Tub & Shower, Flooring - Stone/Ceramic Tile
Property History
$535,000
Was $549,000
Aug 5, 2026
MLS® 73540867
$549,000
Jun 24, 2026
MLS® 73540867
Listing Agent: Katie Gilbert
Listing Office: Conway - Marshfield
MLS® Number: 73540867