4390 Main Barnstable — Photo 1 of 36
Recent Drop: $1,500,000
$3,500,000
Investment Analysis — 4390 Main
Barnstable, MA 02637 — Cummaquid
Based on HUD Small Area Fair Market Rent for Barnstable Town, MA MSA, a 5-bedroom in 02637 carries an estimated $4,160/mo in gross rent — about a 0.29% cap rate and $10,197/yr in estimated NOI at the $3,500,000 list price. Adjust every assumption in the calculator below.
Beds
5
Baths
4
SqFt
5,442
Style
Single Family
Built
1994
WATERFRONT ESTATE – This rare Cape Cod retreat blends classic coastal architecture with modern refinement. Refreshed with new siding and a Red Cedar roof (August 2025), the home offers 5 bedrooms and 5 baths, a chef’s kitchen with Viking professional gas range, Sub-Zero refrigerator, and center island with prep sink flows seamlessly into the sun-filled living room, dining area, and waterfront sunroom. The main residence includes a 2-car garage and full basement, while a versatile guest house with its own 2-car garage and striking fieldstone fireplace invites endless possibilities as a one or two-bedroom retreat, artist’s studio, game room, or workshop. Set on 3.8 private acres, the estate features a heated in-ground pool, landscaped grounds, and direct access to tidal waters. More than a residence, it is a private Cape Cod sanctuary offering beauty, privacy, and an unparalleled coastal lifestyle. 2-Year Choice ULTIMATE Home Warranty included. Some photos virtually staged.
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 5,442 sq ft principal dwelling). Lot size: 165,963 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 • Refrigerator • Washer • Dryer • Vacuum System • Range Hood
Neighborhood
Pool
Geography
Floorplan Breakdown
Structural Layout
Living Room
Lvl Main,First20 x 20
Flooring - Hardwood, Crown Molding
Dining Room
Lvl Main,First18 x 15
Flooring - Hardwood, Wainscoting, Crown Molding, Decorative Molding
Kitchen
Lvl Main,First22 x 12
Flooring - Hardwood, Dining Area, Pantry, Countertops - Stone/Granite/Solid, Kitchen Island, Open Floorplan, Recessed Lighting, Second Dishwasher
Office
Lvl Second14 x 20
Closet, Flooring - Wall to Wall Carpet
Family Room
Lvl Main,First17 x 35
Flooring - Hardwood, Window Seat
Master Bedroom
Lvl Second17 x 18.5
Bathroom - Full, Bathroom - Double Vanity/Sink, Skylight, Walk-In Closet(s), Flooring - Stone/Ceramic Tile, Double Vanity, Recessed Lighting
Bedroom 2
Lvl Second16 x 12
Bedroom 3
Lvl Second18 x 12
Closet, Recessed Lighting, Window Seat
Bedroom 4
Lvl Second18 x 12
Closet, Flooring - Wall to Wall Carpet
Bedroom 5
Lvl Second15 x 10
Closet, Flooring - Wall to Wall Carpet
Bathroom 1
Lvl Second17.5 x 10.5
Bathroom - Full, Bathroom - Double Vanity/Sink, Bathroom - Tiled With Shower Stall, Skylight, Flooring - Stone/Ceramic Tile, Double Vanity, Soaking Tub
Bathroom 2
Lvl Second9.5 x 9
Bathroom - Full, Bathroom - Double Vanity/Sink, Flooring - Stone/Ceramic Tile, Enclosed Shower - Fiberglass
Bathroom 3
Lvl Third11 x 8
Bathroom - Full, Bathroom - Tiled With Tub, Closet - Linen, Flooring - Hardwood
Property History
$3,500,000
Was $3,998,000
Sep 6, 2026
MLS® 73426596
$3,998,000
Was $4,249,000
Aug 9, 2026
MLS® 73426596
$4,249,000
Was $4,498,000
Jul 10, 2026
MLS® 73426596
$4,498,000
Was $4,748,900
Jun 19, 2026
MLS® 73426596
$4,748,900
Was $4,798,900
Jun 6, 2026
MLS® 73426596
$4,798,900
Was $4,875,000
May 31, 2026
MLS® 73426596
$4,875,000
Was $4,899,000
May 23, 2026
MLS® 73426596
$4,899,000
Was $4,950,000
May 8, 2026
MLS® 73426596
$4,950,000
Was $4,975,000
Apr 24, 2026
MLS® 73426596
$4,975,000
Was $5,000,000
Sep 21, 2025
MLS® 73426596
$5,000,000
Sep 5, 2025
MLS® 73426596
Listing Agent: Robert Mackinnon
Listing Office: eXp Realty LLC
MLS® Number: 73426596