Twenty|20

10–40 Child St, Cambridge, MA 02141

Twenty|20 is a 20-story apartment building at 10–40 Child St in East Cambridge, Cambridge, MA 02141, with 355 apartments, built in 2013.

At a glance

355 apartments (the municipal assessor (via MassGIS))
Built in 2013
20 floors
96,692 sq ft of building area
1.14 acre lot
Assessed at $180,776,300 for fiscal year 2026
Last sold as a whole for $197,000,000 in August 2015

Homes for rent in Twenty|20

20 Child St. #1110 — $3,182/mo · 1 ba, 423 sq ft
20 Child St. #1806 — $3,242/mo · 1 ba, 423 sq ft
20 Child St. #1220 — $3,262/mo · 1 ba, 495 sq ft
20 Child St. #304 — $3,382/mo · 1 ba, 603 sq ft
20 Child Street #1016 — $3,399/mo · 1 bd, 1 ba, 605 sq ft
20 Child St. #310 — $3,507/mo · 1 ba, 580 sq ft
20 Child St. #319 — $3,547/mo · 1 ba, 567 sq ft
20 Child St. #208 — $3,557/mo · 1 ba, 641 sq ft
20 Child St. #2006 — $3,582/mo · 1 ba, 423 sq ft
20 Child St. #511 — $3,936/mo · 1 bd, 1 ba, 726 sq ft
20 Child St. #1611 — $4,056/mo · 1 bd, 1 ba, 726 sq ft
20 Child St. #717 — $4,121/mo · 1 bd, 1 ba, 789 sq ft
20 Child St. #1517 — $4,161/mo · 1 bd, 1 ba, 789 sq ft
20 Child St. #719 — $4,186/mo · 1 bd, 1 ba, 753 sq ft
20 Child St. #1219 — $4,336/mo · 1 bd, 1 ba, 753 sq ft
20 Child St. #PH04 — $4,406/mo · 1 bd, 1 ba, 583 sq ft
20 Child St. #607 — $4,742/mo · 2 bd, 2 ba, 993 sq ft
20 Child St. #707 — $4,752/mo · 2 bd, 2 ba, 993 sq ft
20 Child St. #1807 — $4,852/mo · 2 bd, 2 ba, 993 sq ft
20 Child St. #301 — $4,892/mo · 2 bd, 2 ba, 1,194 sq ft
20 Child St. #1418 — $5,037/mo · 2 bd, 2 ba, 1,017 sq ft
20 Child St. #201 — $5,092/mo · 2 bd, 2 ba, 1,194 sq ft
20 Child St. #408 — $5,112/mo · 2 bd, 2 ba, 1,062 sq ft
20 Child St. #PH03 — $5,121/mo · 1 bd, 1 ba, 799 sq ft
20 Child St. #1519 — $5,367/mo · 2 bd, 2 ba, 1,017 sq ft
20 Child St. #PH07 — $5,892/mo · 2 bd, 2 ba, 993 sq ft

Getting around

Walkability: 100 out of 100, from how close everyday places are.

Closest train and subway stops:

Community College (MBTA Orange Line), 0.2 mi
Lechmere (MBTA Green Line D·E), 0.3 mi
Science Park/West End (MBTA Green Line D·E), 0.4 mi

Closest bus stops:

Lechmere (MBTA 69 80 87), 0.3 mi
Main St @ W School St (MBTA 92), 0.5 mi
Sullivan Square (MBTA 85 89 90), 0.9 mi

Public schools nearby

Warren-Prescott K-8 School (elementary, grades PK–8), 0.6 mi
Vassal Lane Upper School (middle, grades 6–8), 0.8 mi
Charlestown High School (high, grades 7–12), 0.8 mi

The district decides which school serves an address. Distances are straight-line.

Questions about Twenty|20

How many units are in Twenty|20?

Twenty|20 has 355 apartments, according to the municipal assessor (via MassGIS).

When was Twenty|20 built?

Twenty|20 was built in 2013 and has 20 floors.

Are there homes for sale or rent in Twenty|20 right now?

Yes: 26 for rent from $3,182 a month, listed on this page. Benjamin Realty can show any of them.

What is the closest T or train station to Twenty|20?

Community College (MBTA Orange Line) is 0.2 miles away, in a straight line.

Buildings near Twenty|20

Regatta Riverview Residences — 10 Museum Way, 430 condos · built 1998 · 24 floors · 12 listed now, 0.1 mi
Sierra — 1–2 Earhart St, 230 condos · built 2006 · 8 floors · 10 listed now, 0.1 mi
Archstone Northpoint — 1 Leighton St, 426 apartments · built 2006 · 22 floors · 30 listed now, 0.1 mi
AVA East Building — 2 Leighton St, 265 apartments · built 2017 · 6 floors · 15 listed now, 0.2 mi
Thomas Graves Landing — 4 Canal Pk, 168 condos · built 1998 · 8 floors · 3 listed now, 0.2 mi
General Warren — 47 Washington St., 96 apartments · built 1971, 0.3 mi
Zinc Apartments — 22 Water St, 392 apartments · built 2014 · 15 floors · 26 listed now, 0.4 mi
Zelma Lacey House — 9 W School St, 66 apartments, 0.4 mi

More: all 63 large buildings in Cambridge · Cambridge homes for sale and rent · East Cambridge neighborhood guide

Sources

Assessed values and sales are public records from municipal assessors. An assessed value is set for taxation and may differ from market value. Listing information from MLS Property Information Network (MLS PIN), deemed reliable but not guaranteed. Data checked 2026-11-02.

To ask about homes in Twenty|20 or book a showing, call Benjamin Realty at (617) 734-5050 or email [email protected].