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- Studio–3 Bedrooms
- $3,095–$7,548Rent Pricing
- 439–1,303Square Feet
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 located in the East Cambridge Neighborhood and 02141 Zip code of Cambridge, MA. This community is professionally managed by Willow Bridge Property Company
Unique Features and Amenities
- 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*
Property Contact Info

Floorplan Pricing and Availability
Flats on First offers Studio to 3 Bedroom apartments starting from $3,095 and having 439–1,303 sq ft. Here is the current pricing and availability:
New! Interactive Property Map
Studio
Show Unavailable FloorplansFrom $3,095
Floorplan S1
Studio, 1 Bath, 439 sq ftCheapest StudioThis is the cheapest Studio at this PropertyAvailable NowModel Gallery
Floorplans
Availability Details
Price Availability Date Unit Sq Ft Deposit $3,095 Available Now 616B 440 $500 Model Amenities and Features
Features
- Balcony
- Intercom
- Wi-Fi
Kitchen
- Kitchen
- Quartz Countertops
Unit 616B Rent and Fees
Price
- From $3,095
Deposit
- $500 deposit
Model Rent and Fees
Price
- $3,095 - $4,498
Apartment Model: S1From $3,095Studio, 1 Bath, 439 sq ftAvailable NowS1 - Floorplan 1 Apartment Unit: 616BApartment Model: S1From $3,095Studio, 1 Bath, 440 sq ftAvailable NowFrom $3,295
Floorplan S2
Studio, 1 Bath, 584 sq ftAvailable NowModel Gallery
Floorplans
Availability Details
Price Availability Date Unit Sq Ft Deposit $3,295 Available Now 606B 592 $500 Model Amenities and Features
Features
- Balcony
- Intercom
- Wi-Fi
Kitchen
- Kitchen
- Quartz Countertops
Unit 606B Rent and Fees
Price
- From $3,295
Deposit
- $500 deposit
Model Rent and Fees
Price
- $3,295 - $4,772
Apartment Model: S2From $3,295Studio, 1 Bath, 584 sq ftAvailable NowS2 - Floorplan 1 Apartment Unit: 606BApartment Model: S2From $3,295Studio, 1 Bath, 592 sq ftAvailable NowFloorplan S3
Studio, 1 Bath, 627 sq ftLargest StudioThis is the largest Studio at this PropertyModel Gallery
Floorplans
Availability Details
Availability Date Unit Sq Ft Deposit Unavailable S3 627 sq ft $500 Model Amenities and Features
Features
- Balcony
- Intercom
- Wi-Fi
Kitchen
- Kitchen
- Quartz Countertops
Model Rent and Fees
Price
- Call For Rates
Deposit
- $500 deposit
Apartment Model: S3Call For RatesStudio, 1 Bath, 627 sq ftUnavailableS3 - Floorplan 1 1 Bedroom
Show Unavailable FloorplansFrom $4,017
Floorplan A2
1 Bed, 1 Bath, 718 sq ftCheapest 1 BedroomThis is the cheapest 1 Bedroom at this PropertyAvailable Mar 22Model Gallery
Floorplans
Availability Details
Price Availability Date Unit Sq Ft Deposit $4,017 March 22, 2025 304C 736 $500 Model Amenities and Features
Features
- Balcony
- Intercom
- Wi-Fi
Kitchen
- Kitchen
- Quartz Countertops
Unit 304C Rent and Fees
Price
- From $4,017
Deposit
- $500 deposit
Model Rent and Fees
Price
- $4,017 - $5,674
Apartment Model: A2From $4,0171 Bedroom, 1 Bath, 718 sq ftAvailable March 22, 2025A2 - Floorplan 1 Apartment Unit: 304CApartment Model: A2From $4,0171 Bedroom, 1 Bath, 736 sq ftAvailable March 22, 2025From $4,917
Floorplan A10
1 Bed, 1 Bath, 1101 sq ftLargest 1 BedroomThis is the largest 1 Bedroom at this PropertyAvailable Apr 10Model Gallery
Floorplans
Availability Details
Price Availability Date Unit Sq Ft Deposit $4,917 April 10, 2025 615B 1101 $500 Model Amenities and Features
Features
- Balcony
- Intercom
- Wi-Fi
Kitchen
- Kitchen
- Quartz Countertops
Unit 615B Rent and Fees
Price
- From $4,917
Deposit
- $500 deposit
Model Rent and Fees
Price
- $4,917 - $7,498
Apartment Model: A10From $4,9171 Bedroom, 1 Bath, 1101 sq ftAvailable April 10, 2025A10 - Floorplan 1 Apartment Unit: 615BApartment Model: A10From $4,9171 Bedroom, 1 Bath, 1101 sq ftAvailable April 10, 2025Floorplan A1
1 Bed, 1 Bath, 699 sq ftModel Gallery
Floorplans
Availability Details
Availability Date Unit Sq Ft Deposit Unavailable A1 699 sq ft $500 Model Amenities and Features
Features
- Balcony
- Intercom
- Wi-Fi
Kitchen
- Kitchen
- Quartz Countertops
Model Rent and Fees
Price
- Call For Rates
Deposit
- $500 deposit
Apartment Model: A1Call For Rates1 Bedroom, 1 Bath, 699 sq ftUnavailableA1 - Floorplan 1 Floorplan A6
1 Bed, 1 Bath, 747 sq ftModel Gallery
Floorplans
Availability Details
Availability Date Unit Sq Ft Deposit Unavailable A6 747 sq ft $500 Model Amenities and Features
Features
- Balcony
- Intercom
- Wi-Fi
Kitchen
- Kitchen
- Quartz Countertops
Model Rent and Fees
Price
- Call For Rates
Deposit
- $500 deposit
Apartment Model: A6Call For Rates1 Bedroom, 1 Bath, 747 sq ftUnavailableA6 - Floorplan 1 Floorplan A7
1 Bed, 1 Bath, 755 sq ftModel Gallery
Floorplans
Availability Details
Availability Date Unit Sq Ft Deposit Unavailable A7 755 sq ft $500 Model Amenities and Features
Features
- Balcony
- Intercom
- Wi-Fi
Kitchen
- Kitchen
- Quartz Countertops
Model Rent and Fees
Price
- Call For Rates
Deposit
- $500 deposit
Apartment Model: A7Call For Rates1 Bedroom, 1 Bath, 755 sq ftUnavailableA7 - Floorplan 1 Floorplan A8
1 Bed, 1 Bath, 794 sq ftModel Gallery
Floorplans
Availability Details
Availability Date Unit Sq Ft Deposit Unavailable A8 794 sq ft $500 Model Amenities and Features
Features
- Balcony
- Intercom
- Wi-Fi
Kitchen
- Kitchen
- Quartz Countertops
Model Rent and Fees
Price
- Call For Rates
Deposit
- $500 deposit
Apartment Model: A8Call For Rates1 Bedroom, 1 Bath, 794 sq ftUnavailableA8 - Floorplan 1 Floorplan A3
1 Bed, 1 Bath, 813 sq ftModel Gallery
Floorplans
Availability Details
Availability Date Unit Sq Ft Deposit Unavailable A3 813 sq ft $500 Model Amenities and Features
Features
- Balcony
- Intercom
- Wi-Fi
Kitchen
- Kitchen
- Quartz Countertops
Model Rent and Fees
Price
- Call For Rates
Deposit
- $500 deposit
Apartment Model: A3Call For Rates1 Bedroom, 1 Bath, 813 sq ftUnavailableA3 - Floorplan 1 Floorplan A4H
1 Bed, 1 Bath, 896 sq ftModel Gallery
Floorplans
Availability Details
Availability Date Unit Sq Ft Deposit Unavailable A4H 896 sq ft $500 Model Amenities and Features
Features
- Balcony
- Intercom
- Wi-Fi
Kitchen
- Kitchen
- Quartz Countertops
Model Rent and Fees
Price
- Call For Rates
Deposit
- $500 deposit
Apartment Model: A4HCall For Rates1 Bedroom, 1 Bath, 896 sq ftUnavailableA4H - Floorplan 1 Floorplan A5
1 Bed, 1 Bath, 897 sq ftModel Gallery
Floorplans
Availability Details
Availability Date Unit Sq Ft Deposit Unavailable A5 897 sq ft $500 Model Amenities and Features
Features
- Balcony
- Intercom
- Wi-Fi
Kitchen
- Kitchen
- Quartz Countertops
Model Rent and Fees
Price
- Call For Rates
Deposit
- $500 deposit
Apartment Model: A5Call For Rates1 Bedroom, 1 Bath, 897 sq ftUnavailableA5 - Floorplan 1 Floorplan A9
1 Bed, 1 Bath, 914 sq ftModel Gallery
Floorplans
Availability Details
Availability Date Unit Sq Ft Deposit Unavailable A9 914 sq ft $500 Model Amenities and Features
Features
- Balcony
- Intercom
- Wi-Fi
Kitchen
- Kitchen
- Quartz Countertops
Model Rent and Fees
Price
- Call For Rates
Deposit
- $500 deposit
Apartment Model: A9Call For Rates1 Bedroom, 1 Bath, 914 sq ftUnavailableA9 - Floorplan 1 2 Bedrooms
Show Unavailable FloorplansFrom $5,268
Floorplan B1
2 Beds, 2 Baths, 977 sq ftCheapest 2 BedroomThis is the cheapest 2 Bedroom at this PropertyAvailable NowModel Gallery
Floorplans
Availability Details
Price Availability Date Unit Sq Ft Deposit $5,268 Available Now 204C 1001 $500 Model Amenities and Features
Features
- Balcony
- Intercom
- Wi-Fi
Kitchen
- Kitchen
- Quartz Countertops
Unit 204C Rent and Fees
Price
- From $5,268
Deposit
- $500 deposit
Model Rent and Fees
Price
- $5,268 - $7,477
Apartment Model: B1From $5,2682 Bedroom, 2 Bath, 977 sq ftAvailable NowB1 - Floorplan 1 Apartment Unit: 204CApartment Model: B1From $5,2682 Bedroom, 2 Bath, 1001 sq ftAvailable NowFrom $5,318
Floorplan B8
2 Beds, 2 Baths, 1221 sq ftLargest 2 BedroomThis is the largest 2 Bedroom at this PropertyAvailable NowModel Gallery
Floorplans
Availability Details
Price Availability Date Unit Sq Ft Deposit $5,318 Available Now 314B 1221 $500 Model Amenities and Features
Features
- Balcony
- Intercom
- Wi-Fi
Kitchen
- Kitchen
- Quartz Countertops
Unit 314B Rent and Fees
Price
- From $5,318
Deposit
- $500 deposit
Model Rent and Fees
Price
- $5,318 - $7,548
Apartment Model: B8From $5,3182 Bedroom, 2 Bath, 1221 sq ftAvailable NowB8 - Floorplan 1 Apartment Unit: 314BApartment Model: B8From $5,3182 Bedroom, 2 Bath, 1221 sq ftAvailable NowFloorplan B5
2 Beds, 1 Bath, 909 sq ftModel Gallery
Floorplans
Availability Details
Availability Date Unit Sq Ft Deposit Unavailable B5 909 sq ft $500 Model Amenities and Features
Features
- Balcony
- Intercom
- Wi-Fi
Kitchen
- Kitchen
- Quartz Countertops
Model Rent and Fees
Price
- Call For Rates
Deposit
- $500 deposit
Apartment Model: B5Call For Rates2 Bedroom, 1 Bath, 909 sq ftUnavailableB5 - Floorplan 1 Floorplan B6
2 Beds, 2 Baths, 933 sq ftModel Gallery
Floorplans
Availability Details
Availability Date Unit Sq Ft Deposit Unavailable B6 933 sq ft $500 Model Amenities and Features
Features
- Balcony
- Intercom
- Wi-Fi
Kitchen
- Kitchen
- Quartz Countertops
Model Rent and Fees
Price
- Call For Rates
Deposit
- $500 deposit
Apartment Model: B6Call For Rates2 Bedroom, 2 Bath, 933 sq ftUnavailableB6 - Floorplan 1 Floorplan B7
2 Beds, 2 Baths, 1050 sq ftModel Gallery
Floorplans
Availability Details
Availability Date Unit Sq Ft Deposit Unavailable B7 1050 sq ft $500 Model Amenities and Features
Features
- Balcony
- Intercom
- Wi-Fi
Kitchen
- Kitchen
- Quartz Countertops
Model Rent and Fees
Price
- Call For Rates
Deposit
- $500 deposit
Apartment Model: B7Call For Rates2 Bedroom, 2 Bath, 1050 sq ftUnavailableB7 - Floorplan 1 Floorplan B2
2 Beds, 2 Baths, 1149 sq ftModel Gallery
Floorplans
Availability Details
Availability Date Unit Sq Ft Deposit Unavailable B2 1149 sq ft $500 Model Amenities and Features
Features
- Balcony
- Intercom
- Wi-Fi
Kitchen
- Kitchen
- Quartz Countertops
Model Rent and Fees
Price
- Call For Rates
Deposit
- $500 deposit
Apartment Model: B2Call For Rates2 Bedroom, 2 Bath, 1149 sq ftUnavailableB2 - Floorplan 1 Floorplan B3
2 Beds, 2 Baths, 1152 sq ftModel Gallery
Floorplans
Availability Details
Availability Date Unit Sq Ft Deposit Unavailable B3 1152 sq ft $500 Model Amenities and Features
Features
- Balcony
- Intercom
- Wi-Fi
Kitchen
- Kitchen
- Quartz Countertops
Model Rent and Fees
Price
- Call For Rates
Deposit
- $500 deposit
Apartment Model: B3Call For Rates2 Bedroom, 2 Bath, 1152 sq ftUnavailableB3 - Floorplan 1 Floorplan B4
2 Beds, 2 Baths, 1204 sq ftModel Gallery
Floorplans
Availability Details
Availability Date Unit Sq Ft Deposit Unavailable B4 1204 sq ft $500 Model Amenities and Features
Features
- Balcony
- Intercom
- Wi-Fi
Kitchen
- Kitchen
- Quartz Countertops
Model Rent and Fees
Price
- Call For Rates
Deposit
- $500 deposit
Apartment Model: B4Call For Rates2 Bedroom, 2 Bath, 1204 sq ftUnavailableB4 - Floorplan 1 3 Bedrooms
Floorplan C1
3 Beds, 2 Baths, 1303 sq ftModel Gallery
Floorplans
Availability Details
Availability Date Unit Sq Ft Deposit Unavailable C1 1303 sq ft $500 Model Amenities and Features
Features
- Balcony
- Intercom
- Wi-Fi
Kitchen
- Kitchen
- Quartz Countertops
Model Rent and Fees
Price
- Call For Rates
Deposit
- $500 deposit
Apartment Model: C1Call For Rates3 Bedroom, 2 Bath, 1303 sq ftUnavailableC1 - Floorplan 1
Schedule a Tour
Property Information
- 136 Units
- 5 Stories
- Built in 2021
- View Property Website
Lease Terms
- 6, 7, 8, 9, 10, 11, 12
Pet Policy
Pet Policy - Cats
- Cats Allowed
- 2 Pet Limit
- Dogs And Cats
- 100 Lb Weight Limit
Pet Policy - Dogs
- Dogs Allowed
- 2 Pet Limit
- 100 Lb Weight Limit
- Dogs And Cats
Parking Fees & Info
Parking Other
- Other
Features and Amenities
On-Site Services
- Package Service
Community Features
- Lounge
Outdoor Features
- Courtyard
- Controlled Access
- Deck
Recreation and Fitness
- Fitness Center
- Gameroom
- Bicycle Storage
Interior Features
- Balcony
- Intercom
- Wi Fi
Kitchen Amenities
- Kitchen
- Quartz Countertops
Living Area Features
- Walk In Closets
- Vinyl Flooring

Map
- Shopping
- Colleges
- Grocery
- Medical
- Parks
- Transportation

Map
Hours and Contact Info
Monday | Closed |
Tuesday | 10:30 am–4:00 pm |
Wednesday | 10:30 am–4:00 pm |
Thursday | 10:30 am–4:00 pm |
Friday | 10:30 am–4:00 pm |
Saturday | 10:30 am–4:00 pm |
Sunday | Closed |
Getting Around
Walk Score®
96 / 100
Walker’s Paradise
Daily errands do not require a car
Bike Score®
98 / 100
Biker's Paradise
Daily errands can be accomplished on a bike
Transit Score®
80 / 100
Excellent Transit
Transit is convenient for most trips
What Are Walk Score®, Transit Score®, and Bike Score® Ratings?
- Walk Score® measures the walkability of any address.
- Transit Score® measures access to public transit.
- Bike Score® measures the bikeability of any address.
Frequently Asked Questions about Flats on First
Where is Flats on First located?
Flats on First is located at 21 Charles St near the East Cambridge area of Cambridge, MA
What is the current rent range at Flats on First?
Studio to 3 Bedroom Apartments at Flats on First currently range from $3,095 to $7,548
When is the leasing office open?
- The office Hours for Flats on First are
- Monday Closed
- Tuesday 10:30 am–4:00 pm
- Wednesday 10:30 am–4:00 pm
- Thursday 10:30 am–4:00 pm
- Friday 10:30 am–4:00 pm
- Saturday 10:30 am–4:00 pm
- Sunday Closed
Are pets allowed?
Yes. Pets are allowed at Flats on First. Call us today for info on moving here with your pet.
Lifestyle Ratings
Learn more about Lifestyle SearchRenters Reviews and Ratings
Poor management practices
April 14, 2023The 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.Property Manager Responded
April 18, 2023Hello 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!
Read MoreReview from Apartments.com
Poor noise isolation
September 5, 2022The 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 nervesProperty Manager Responded
September 15, 2022Hello There, Please be sure to contact our team to discuss this matter. Thank you, The Flats on First Team
Review from Apartments.com
Nearby Schools
Cambridge Street Upper School
Kennedy-Longfellow
Fletcher/Maynard Academy
Cambridge Rindge and Latin
Putnam Avenue Upper School
About GreatSchools Data on ApartmentHomeLiving.com.
Points of Interest
Time and distance from Flats on First.
Arts Museums and Landmarks
Big Box and Retail
Colleges and Universities
Groceries
Hospitals
Military Bases
Parks and Recreation
Flats on First has 5 parks within 1.7 miles, including The Boston Public Garden, Boston Common, Freedom Trail, The Freedom Trail, and New England Holocaust Museum.
Restaurants and Dining
Shopping Centers
Flats on First has 5 shopping centers within 1.5 miles.
Transit Stations
Nearby Neighborhoods
Rental Price Ranges in the Area
Bedroom | Average Rent | Cheapest Rent | Highest Rent |
---|---|---|---|
Cambridge Studio Apartments | $2,683 | $1,400 | $10,000+ |
Cambridge 1 Bedroom Apartments | $3,159 | $1,150 | $10,000+ |
Cambridge 2 Bedroom Apartments | $3,661 | $1,175 | $10,000+ |
Cambridge 3 Bedroom Apartments | $4,250 | $800 | $10,000+ |
Cambridge 4 Bedroom Apartments | $5,205 | $900 | $10,000+ |
Cambridge 5 Bedroom Apartments | $6,343 | $950 | $10,000+ |
Cambridge 6 Bedroom Apartments | $8,114 | $925 | $10,000+ |
Cambridge 7 Bedroom Apartments | $4,353 | $875 | $10,000+ |
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