• Photo - Flats on First

Flats on First

21 Charles St, Cambridge, MA 02141

Floor Plan Summary
Total Monthly Price Bedrooms Bathrooms
$2,793 - $7,734 Studio - 3 1 - 2
View Fees and Policies

Rent Specials

Move in before 2/1 and receive 1 MONTH FREE, move in before 2/15 and receive 1/2 MONTH FREE! *Restrictions apply, please contact the leasing team for details.

Pricing and Floor Plans

Rent Estimate
Cost Calculator: Estimate your monthly and one-time fees.

S1

$2,793 - $3,749
Studio, 1 Bath
439 Sq. Ft.

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3 Rentals Available
Unit
Total Price
Sq. Ft.
Available
316B
$2,793
440
Now
423B
$2,852
465
Now
217B
$2,852
443
2/27/26

A9

$4,287 - $5,576
1 Bed, 1 Bath
914 Sq. Ft.

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1 Rental Available
Unit
Total Price
Sq. Ft.
Available
213B
$4,287
914
Now

A8

$3,628 - $4,948
1 Bed, 1 Bath
794 Sq. Ft.

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Feb. 4
Unit
Total Price
Sq. Ft.
Available
204B
$3,628
795
2/4/26

B5

$4,569 - $7,084
2 Beds, 1 Bath
909 Sq. Ft.

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2 Rentals Available
Unit
Total Price
Sq. Ft.
Available
207B
$4,569
911
Now
407B
$4,569
909
3/24/26

B8

$5,334 - $7,734
2 Beds, 2 Baths
1,221 Sq. Ft.

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1 Rental Available
Unit
Total Price
Sq. Ft.
Available
514B
$5,334
1,221
Now

B7

$4,884 - $7,333
2 Beds, 2 Baths
1,050 Sq. Ft.

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Feb. 9
Unit
Total Price
Sq. Ft.
Available
522B
$4,884
1,050
2/9/26
* Price shown is total price based on community-supplied monthly required fees. Excludes user-selected optional fees and variable or usage-based fees and required charges due at or prior to move-in or at move-out. View Fees and Policies for details. Price, availability, fees, and any applicable rent special are subject to change without notice. * Square footage definitions vary. Displayed square footage is approximate.

Details

Property Information

  • Built in 2021
  • 136 units / 5 stories

Fees and Policies

The fees below are based on community-supplied data and may exclude additional fees and utilities.

Utilities & Essentials

  • Monthly Electric/Gas Fee
    Included
  • Personal Liability Insurance
    Included
  • Monthly Sewer Fee
    Included
  • Monthly Water Fee
    Included

One-Time Basics

Due at Move-In

  • Security Deposit
    $500 one-time
  • First Month's Rent Deposit
    Varies

Property Fee Disclaimer Based on community-supplied data and independent market research. Subject to change without notice. May exclude fees for mandatory or optional services and usage-based utilities.

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Explore Commute Options

Destination Address
  • Drive Time
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  • Walk Time
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  • Bike Ride Time
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  • Public Transit
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Property Highlights

  • Balconies*
  • Social Spaces With Complimentary Wifi
  • Game Room
  • Outdoor Lounges With Fire Pits
  • Pet Friendly
  • Schlage Smart Locks
  • Direct Access Entry*
  • Community Kitchen And Dining
  • Landscaped Courtyards With Outdoor Seating
  • Luxury, Wood-Grained Vinyl Flooring

Apartment Features

  • Balcony
  • Deck
  • Intercom
  • Kitchen
  • Quartz Countertops
  • Vinyl Flooring
  • Walk-In Closets
  • Wi-Fi

Community Features

  • Bicycle Storage
  • Controlled Access
  • Courtyard
  • Fitness Center
  • Gameroom
  • Lounge
  • Package Service

Map of Flats on First

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Neighborhood Scores

Walk Score ®

Walker's Paradise97 / 100

Transit Score ®

Excellent Transit88 / 100

Bike Score ®

Biker's Paradise98 / 100

Soundscore

Active70 / 100

Transit

Subway
0 min Drive
Green Line - E - Massachusetts Bay Transportation Authority Subway (The T)
Massachusetts Bay Transportation Authority Subway
Subway
2 min Drive
Red Line - Massachusetts Bay Transportation Authority Subway (The T)
Massachusetts Bay Transportation Authority Subway
Subway
4 min Drive
Green Line - E - Massachusetts Bay Transportation Authority Subway (The T)
Massachusetts Bay Transportation Authority Subway
Subway
6 min Drive
Orange Line - Massachusetts Bay Transportation Authority Subway (The T)
Massachusetts Bay Transportation Authority Subway
Commuter Rail
4 min Drive
Massachusetts Bay Transportation Authority Commuter Rail
Commuter Rail
9 min Drive
Orange Line - Massachusetts Bay Transportation Authority Commuter Rail (Purple Line)
Massachusetts Bay Transportation Authority Commuter Rail
Airport
General Edward Lawrence Logan International
10 min Drive
Logan International

Moving to East Cambridge, Cambridge, MA

Shopping Centers

Shoppers will appreciate Flats on First proximity to Cambridgeside Galleria, Twin City Plaza, and Bunker Hill Mall. Cambridgeside Galleria is 0.6 miles away, and Twin City Plaza is within a 15 minute walk.

Commuting

With a TransitScore of 88, Flats on First has excellent transit, including 10 transit stops within 4.4 miles. Transit options include Lechmere Station and Kendall Station.

Parks and Recreation

Recreational activities near Flats on First are plentiful. Discover 5 parks within 2.1 miles, including Museum of Science, Boston Public Garden, and Boston African American National Historic Site.

Airports

Living in East Cambridge provides easy access to General Edward Lawrence Logan International, located just 9 minutes from Flats on First.

Military Bases

There is Boston Support Center near Cambridge, MA.

Local Education

Primary and Secondary Schools

2 rating

Kennedy-Longfellow

Grades PK-5

Public

undefined rating

Boston Children's School

Grades PK-2

Private

undefined rating

Advent School

Grades PK-6

Private

6 rating

Fletcher/Maynard Academy

Grades PK-5

Public

5 rating

Cambridge Street Upper School

Grades 6-8

Public

8 rating

Putnam Avenue Upper School

Grades 6-8

Public

undefined rating

Little Flower Elementary School

Grades K-8

Private

undefined rating

Commonwealth School

Grades 9-12

Private

8 rating

Cambridge Rindge and Latin

Grades 9-12

Public

6 rating

Community Charter School of Cambridge

Grades 6-12

Charter

Data provided by GreatSchools.org 2024 © 2024. All rights reserved.

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Colleges and Universities

School

Commute Time (Distance)

MIT

Drive: 3 min (1.4 mi)

Suffolk University

Drive: 4 min (1.6 mi)

Bunker Hill Community College

Drive: 4 min (2.1 mi)

Emerson College

Drive: 6 min (2.1 mi)

About Flats on First

Flats on First embodies the best of boutique living, combining the luxuries of a modern apartment community with the comforts of a close-knit neighborhood. Come home to a place of sophistication and serenity in East Cambridge.

Flats on First is an apartment community

Willow Bridge

Contact

Property Address:
21 Charles St,
Cambridge, MA 02141
Phone Number: (857) 380-0179
More Information:
View Property Website
Office Hours
  • SundayCLOSED
  • Monday10:00 AM - 6:00 PM
  • Tuesday10:00 AM - 6:00 PM
  • Wednesday10:00 AM - 6:00 PM
  • Thursday10:00 AM - 6:00 PM
  • Friday10:00 AM - 6:00 PM
  • Saturday10:00 AM - 5:00 PM

Renter Reviews

For Flats on First

4.9

2 Ratings & Reviews

How Is This Rating Determined?

4/15/23

Poor management practices

The apartments are modern and well-designed, if a bit small and short on storage space, and the appliances are way nicer than what you'd find in a normal apartment building in Boston. However, there is absolutely no insulation between floors. You will hear every step your upstairs neighbor takes, and each one will sound like a 20-lb weight being dropped on the floor. It's a shame because the building is otherwise very peaceful, and the neighborhood is really a nice place to live.

Update:...
After four months of living here, I have to take off a star due to issues with the building services and the finishings in the unit. Just too many problems for what this place charges in rent.

As far as the building goes:
1) There's not a package room as is advertised on the website, and the package lockers have been down since late September, with no indication as to when they will be fixed. The building management blames the vendor, but they also haven't found any other solution to the problem. They just scatter everyone's packages all over the floor of the mail area, unsecured, and don't send any notifications when you receive something.
2) The after-hours maintenance staff isn't responsive. There's not a number to call if you have an after-hours maintenance issue; you just have to submit a request through the resident app and hope someone sees it. I had a lock-out issue once, and, after waiting a half-hour for a maintenance person to arrive and then another 40 minutes for the person to try to unlock my door, I finally just went and stayed in a hotel for the night.

As far as the units, the main window in my apartment is without window treatment of any kind. Management said something about them either ordering or receiving the wrong kind of blinds for that window and then told me I could provide the window treatment on my own. Not OK for what this place charges.

Update #2: I can now echo one of the other reviews here. I've had packages go missing as well. Contrary to what the website says, there is no "24-hour package room". Management just lets packages be scattered all over the floors by the mailboxes, unsecured and unorganized. Not even a basic level of competence on display here.

Review from Apartments.com

1 Person Found This Helpful

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Property Manager at Flats on First responded to this review

Hello There, we're disappointed to hear your experience wasn't up to par. We'd appreciate the chance to hear your concerns in-depth and suggest appropriate solutions. Please contact us at flatsonfirst@lincolnapts.com or 1 617-468-1400. We're... confident that we can turn your experience around, and look forward to getting correcting it!

9/7/22

Poor noise isolation

The facilities are all very nice and new but the noise isolation isn't up to par. I can hear upstairs stomping, showering, running taps etc. Just moved in and it's already getting on my nerves

Review from Apartments.com

7 People Found This Helpful

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Property Manager at Flats on First responded to this review

Hello There,

Please be sure to contact our team to discuss this matter.

Thank you,

The Flats on First Team

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