Cost Calculator: Estimate your monthly and one-time fees.
S1
$2,757 - $3,016
Studio, 1 Bath
, 439 Sq. Ft.
Show Floor Plan Details
3 Rentals Available
Unit
Total Price
Sq. Ft.
Available
316B
$2,757
440 Sq. Ft.
Now
217B
$2,757
443 Sq. Ft.
Now
605B
$3,016
440 Sq. Ft.
6/2/26
S2
$3,141 - $3,216
Studio, 1 Bath
, 584 Sq. Ft.
Show Floor Plan Details
2 Rentals Available
Unit
Total Price
Sq. Ft.
Available
612B
$3,216
593 Sq. Ft.
Now
410B
$3,141
588 Sq. Ft.
Now
A7
$3,974
1 Bed, 1 Bath
, 755 Sq. Ft.
Show Floor Plan Details
May. 19
Unit
Total Price
Sq. Ft.
Available
619B
$3,974
767 Sq. Ft.
5/19/26
New
A8
$4,074
1 Bed, 1 Bath
, 794 Sq. Ft.
Show Floor Plan Details
Jul. 16
Unit
Total Price
Sq. Ft.
Available
604B
$4,074
794 Sq. Ft.
7/16/26
New
A3
$4,174
1 Bed, 1 Bath
, 813 Sq. Ft.
Show Floor Plan Details
Aug. 2
Unit
Total Price
Sq. Ft.
Available
402C
$4,174
813 Sq. Ft.
8/2/26
B2
$5,459
2 Beds, 2 Baths
, 1,149 Sq. Ft.
Show Floor Plan Details
Jun. 10
Unit
Total Price
Sq. Ft.
Available
103C
$5,459
1,164 Sq. Ft.
6/10/26
* 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.
* 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.
* 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.
* 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.
* 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.
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 Application
First Month's Rent Deposit
Varies one-time
Due at Move-In
Security Deposit
$500
Other
Garage Rental
$320 / mo
Additional Parking Options
Other
Other Pets
Pet Rent
$60 - $85 / mo
Cats
Cats Allowed
100 lbs. Weight Limit
Restrictions
None
Comments
Dogs and Cats
Dogs
Dogs Allowed
100 lbs. Weight Limit
Restrictions
None
Comments
Dogs and Cats
Personalized Add-Ons
Personal Liability Renters Insurance
$18.75 / mo
Situational
Month-to-Month Fee
$700 / occurrence
Late Fee
Varies / occurrence
NSF Fee
$50 / occurrence
Key Fob Replacement
$5 - $50 / occurrence
Additional Security Deposit
Varies one-time
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.
Matterport 3D Tours
Property Highlights
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.
Balconies*
Bike Storage
Butterflymx Intercom System
Community Kitchen And Dining
Controlled Access Parking Garage
Co-Working Spaces
Direct Access Entry*
Full-Size, High Efficiency Washer/Dryer
Game Room
Gourmet Kitchens With Stainless Steel Appliances
Grilling And Al Fresco Dining
Groom Room
Landscaped Courtyards With Outdoor Seating
Luxury, Wood-Grained Vinyl Flooring
Open Air Amphitheater
Open Floor Plans
Outdoor Lounges With Fire Pits
Pet Friendly
Roof Deck With City Views
Schlage Smart Locks
Social Spaces With Complimentary Wifi
Stand-Up Showers*
Walk-In Closets*
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
Area Scores
Walkability
Exceptionally walkable100 / 100
Transit
Exceptional public transit90 / 100
Driveability
Fairly drivable50 / 100
Bikeability
Exceptionally bikeable90 / 100
Scores provided by
Transit
Subway
Lechmere Station
0 min Drive
Subway
Kendall Station
2 min Drive
Subway
Science Park Station
4 min Drive
Subway
Community College Station
6 min Drive
Commuter Rail
North Station
4 min Drive
Commuter Rail
Back Bay Station
9 min Drive
Airport
General Edward Lawrence Logan International
10 min Drive
Moving to East Cambridge, Cambridge, MA
Shopping Centers
Shoppers will appreciate Flats on First proximity to Cambridgeside, Twin City Plaza, and Bunker Hill Mall. Cambridgeside is 0.6 miles away, and Twin City Plaza is within a 15 minute walk.
Commuting
With top-notch public transportation and a TransitScore of 90, East Cambridge is exceptional public transit. Within 4.4 miles of Flats on First, you’ll find Lechmere Station, Kendall Station, and Science Park 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.
Property Details
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 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 located in Cambridge, MA in the 02141 zip code.
Contact
Property Address: 21 Charles St, Cambridge, MA 02141
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.