21 Cottage Park Ave Cambridge — Photo 1 of 40
$3,599,950
21 Cottage Park Ave, Cambridge, MA 02140
Cambridge, MA 02140 — North Cambridge
Beds
5
Baths
4.5
SqFt
4,087
Style
Single Family
Built
2026
Striking new luxury single family on a quiet, tree-lined North Cambridge street, blending classic New England architecture with modern finishes and smart home readiness. Over 4,000 sf across four finished levels: 5 beds, 4.5 baths. The open first floor showcases a chef's kitchen with white oak shaker cabinetry, tile subway backsplash, quartz counters, Thermador stainless appliances, classic hood, and oversized island over herringbone oak floors. Half bath and full pantry with water dispensers rounds out the 1st floor. The second floor features a primary suite with spa bath, soaking tub and walk-in shower, plus a second en-suite bedroom and laundry room. Third floor offers two more bedrooms, full bath, and eave storage. Finished lower level features: entertainment room, private study, a bedroom and secondary laundry. Private fenced yard plus detached 1-car garage. Walk to Davis, Porter, Alewife T, Minuteman Bikeway, top schools, parks, and Cambridge/Somerville dining.
Key facts
It was listed on September 30, 2026. The annual property taxes are $6,377 (2025 tax year). It sits on a 0.1-acre (4,520 sq ft) lot.
Open Houses
Market Value Analysis
* Analysis is based on 24 actively listed and recently sold comparable properties strictly within Cambridge, MA.
Property Details
Financials
Parking
Interior Specifications
Climate & Utilities
Building & Exterior
Property & Lot
Amenities & Appliances
Electric Water Heater • Water Heater • Range • Dishwasher • Disposal • Microwave • Refrigerator • Washer • Dryer
Geography
Floorplan Breakdown
Structural Layout
Living Room
Lvl FirstDining Room
Lvl FirstKitchen
Lvl FirstFamily Room
Lvl BasementPrimary Bedroom
Lvl SecondBedroom 2
Lvl SecondBedroom 3
Lvl ThirdBedroom 4
Lvl ThirdProperty History
$3,599,950
Sep 30, 2026
MLS® 73584464
$3,628,900
Jul 21, 2026
MLS® 73528101
$3,628,900
Jun 2, 2026
MLS® 73528101
Questions about this home
When was 21 Cottage Park Ave, Cambridge listed?
21 Cottage Park Ave, Cambridge was listed on September 30, 2026.
Has the price of 21 Cottage Park Ave, Cambridge changed?
The price hasn't changed since it was listed at $3,599,950.
What are the property taxes for 21 Cottage Park Ave, Cambridge?
The annual property taxes for 21 Cottage Park Ave, Cambridge are $6,377 (2025 tax year).
How big is the lot at 21 Cottage Park Ave, Cambridge?
21 Cottage Park Ave, Cambridge sits on a 0.1-acre (4,520 sq ft) lot.
What is the status of 21 Cottage Park Ave, Cambridge?
21 Cottage Park Ave, Cambridge is actively listed for sale.
Population
21,204
U.S. Census Bureau, ACS 2024 5-Year Estimates (B01003)
Median Household Income
$135K
U.S. Census Bureau, ACS 2024 5-Year Estimates (B19013)
Renter-Occupied Homes
65.1%
U.S. Census Bureau, ACS 2024 5-Year Estimates (B25003)
New Construction Permits — Middlesex County
2,698 housing units permitted in the last 12 months (+3% vs the prior 12 months) — 1,713 in 5+ unit buildings
U.S. Census Bureau, Building Permits Survey (through Jul '26)
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 4,087 sq ft principal dwelling). Lot size: 4,520 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.
Listing Agent: John Raposo
Listing Office: eXp Realty LLC
MLS® Number: 73584464
