For sale

$3,599,950

21 Cottage Park Ave, Cambridge, MA 02140

5beds

4,087sqft

$22,034/mo

Get pre-qualified

Single Family Residence

Built in 2026

4,520 Square Feet Lot

$3,521,400 Zestimate^®

$881/sqft

$-- HOA

What's special

Walk-in showerLaundry roomClassic hoodEntertainment roomFinished lower levelOpen first floorSecond en-suite bedroom

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.

12 days
400
31

Facts & features

Interior

Bedrooms & bathrooms

Bedrooms: 5
Bathrooms: 5
Full bathrooms: 4
1/2 bathrooms: 1

Primary bedroom

Level: Second

Bedroom 2

Level: Second

Bedroom 3

Level: Third

Bedroom 4

Level: Third

Dining room

Level: First

Family room

Level: Basement

Kitchen

Level: First

Living room

Level: First

Heating

Air Source Heat Pumps (ASHP)

Cooling

Central Air, Air Source Heat Pumps (ASHP)

Appliances

Included: Electric Water Heater, Water Heater, Range, Dishwasher, Disposal, Microwave, Refrigerator, Washer, Dryer
Laundry: Electric Dryer Hookup

Features

Wet Bar
Flooring: Tile, Engineered Hardwood
Doors: Insulated Doors
Windows: Insulated Windows
Basement: Full,Finished
Number of fireplaces: 1

Interior area

Total structure area: 4,087
Total interior livable area: 4,087 sqft
Finished area above ground: 4,087
Finished area below ground: 1,000

Property

Parking

Total spaces: 4
Parking features: Detached, Paved Drive, Off Street
Garage spaces: 1
Uncovered spaces: 3

Features

Patio & porch: Porch, Deck, Deck - Composite
Exterior features: Porch, Deck, Deck - Composite, Professional Landscaping, Sprinkler System
Fencing: Fenced/Enclosed

Lot

Size: 4,520 Square Feet

Details

Parcel number: 413233
Zoning: C-1

Construction

Type & style

Home type: SingleFamily
Architectural style: Colonial
Property subtype: Single Family Residence

Materials

Frame
Foundation: Concrete Perimeter
Roof: Shingle,Rubber,Metal

Condition

Year built: 2026

Utilities & green energy

Sewer: Public Sewer
Water: Public
Utilities for property: for Electric Range, for Electric Dryer

Community & HOA

HOA

Has HOA: No

Location

Region: Cambridge

Financial & listing details

Price per square foot: $881/sqft
Tax assessed value: $1,165,300
Annual tax amount: $6,377
Date on market: 9/30/2026

Estimated market value

$3,521,400

$3.35M - $3.70M

Not available

Price history

Date	Event	Price
9/30/2026	Listed for sale	$3,599,950-0.8%$881/sqft
Source: MLS PIN #73584464 Report a problem
7/21/2026	Listing removed	$3,628,900$888/sqft
Source: eXp Realty #73528101 Report a problem
6/2/2026	Listed for sale	$3,628,900+229.9%$888/sqft
Source: MLS PIN #73528101 Report a problem
12/29/2023	Sold	$1,100,000-15.1%$269/sqft
Source: MLS PIN #73163697 Report a problem
10/26/2023	Contingent	$1,295,000$317/sqft
Source: MLS PIN #73163697 Report a problem
9/26/2023	Listed for sale	$1,295,000-10.7%$317/sqft
Source: MLS PIN #73163697 Report a problem
9/14/2023	Listing removed	$1,450,000$355/sqft
Source: MLS PIN #73086868 Report a problem
5/17/2023	Listing removed	--
Source: Zillow Rentals Report a problem
5/13/2023	Listed for rent	$5,987$1/sqft
Source: Zillow Rentals Report a problem
5/12/2023	Price change	$1,450,000-9.4%$355/sqft
Source: MLS PIN #73086868 Report a problem
3/13/2023	Listed for sale	$1,600,000$391/sqft
Source: MLS PIN #73086868 Report a problem
3/13/2023	Listing removed	$1,600,000$391/sqft
Source: MLS PIN #73056617 Report a problem
11/9/2022	Listed for sale	$1,600,000+644.2%$391/sqft
Source: MLS PIN #73056617 Report a problem
5/19/1994	Sold	$215,000+230.8%$53/sqft
Source: Public Record Report a problem
12/10/1993	Sold	$65,000-56%$16/sqft
Source: Public Record Report a problem
6/15/1993	Sold	$147,866$36/sqft
Source: Public Record Report a problem

Public tax history

Year	Property taxes	Tax assessment
2025	$7,400 -4.7%	$1,165,300 -11.1%
2024	$7,761 +9.1%	$1,311,000 +8%
2023	$7,113 +7.2%	$1,213,800 +8.3%
2022	$6,633 +4.9%	$1,120,500 +3.6%
2021	$6,326 +4.5%	$1,081,300 +2.7%
2020	$6,056 +6.6%	$1,053,300 +10.2%
2019	$5,680 +5.2%	$956,200 +11.4%
2018	$5,399 +3.5%	$858,400 +6.8%
2017	$5,216 +3.4%	$803,700 +11.4%
2016	$5,043 +0.8%	$721,500 +12.7%
2015	$5,005 -0.3%	$640,000 +6.8%
2014	$5,020 0%	$599,000 +3.3%
2013	$5,021 +2%	$579,800 -0.1%
2012	$4,921 +4.4%	$580,300 +0.5%
2011	$4,712 +7%	$577,400 +1.2%
2010	$4,403 +2.1%	$570,400
2009	$4,312 +1.3%	$570,400 -1.4%
2008	$4,257 -0.8%	$578,400 +0.8%
2007	$4,291 +3.7%	$573,700 +2.4%
2006	$4,136 +4%	$560,400 +9.6%
2005	$3,978 +11.5%	$511,300 +9.3%
2004	$3,568 +20.9%	$467,600 +15%
2003	$2,952 +5.6%	$406,600 +5%
2002	$2,796 +19.9%	$387,200 +60.1%
2000	$2,331	$241,800 +15%
1999	--	$210,300