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- Studio–3 Bedrooms
- $3,027–$7,952Rent 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 $3,027 and having 439–1,303 sq ft. Here is the current pricing and availability:
New! Interactive Property Map
Studio
Show Unavailable FloorplansFrom $3,027
Floorplan S1
Studio, 1 Bath, 439 sq ftCheapest StudioThis is the cheapest Studio at this PropertyAvailable May 10Model Gallery
Floorplans
Availability Details
Price Availability Date Unit Sq Ft Deposit $3,027 May 10, 2025 223B 465 $500 Model Amenities and Features
Features
- Balcony
- Intercom
- Wi-Fi
Kitchen
- Kitchen
- Quartz Countertops
Unit 223B Rent and Fees
Price
- From $3,027
Deposit
- $500 deposit
Model Rent and Fees
Price
- $3,027 - $3,893
Apartment Model: S1From $3,027Studio, 1 Bath, 439 sq ftAvailable May 10, 2025S1 - Floorplan 1 Apartment Unit: 223BApartment Model: S1From $3,027Studio, 1 Bath, 465 sq ftAvailable May 10, 2025From $3,227
Floorplan S2
Studio, 1 Bath, 584 sq ftAvailable Jun 11Model Gallery
Floorplans
Availability Details
Price Availability Date Unit Sq Ft Deposit $3,227 June 11, 2025 406B 592 $500 $3,227 July 24, 2025 512B 593 $500 Model Amenities and Features
Features
- Balcony
- Intercom
- Wi-Fi
Kitchen
- Kitchen
- Quartz Countertops
Model Rent and Fees
Price Range
- $3,227 - $4,572
Rent Pricing
- $3,227 - $4,572
Deposit
- $500 deposit
Unit 406B Rent and Fees
Price
- From $3,227
Deposit
- $500 deposit
Model Rent and Fees
Price
- $3,227 - $4,572
Unit 512B Rent and Fees
Price
- From $3,227
Deposit
- $500 deposit
Model Rent and Fees
Price
- $3,227 - $4,572
Apartment Model: S2From $3,227Studio, 1 Bath, 584 sq ftAvailable June 11, 2025S2 - Floorplan 1 Apartment Unit: 406BApartment Model: S2From $3,227Studio, 1 Bath, 592 sq ftAvailable June 11, 2025Apartment Unit: 512BApartment Model: S2From $3,227Studio, 1 Bath, 593 sq ftAvailable July 24, 2025Floorplan 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 $3,937
Floorplan A2
1 Bed, 1 Bath, 718 sq ftAvailable NowModel Gallery
Floorplans
Availability Details
Price Availability Date Unit Sq Ft Deposit $3,937 Available Now 304C 736 $500 Model Amenities and Features
Features
- Balcony
- Intercom
- Wi-Fi
Kitchen
- Kitchen
- Quartz Countertops
Unit 304C Rent and Fees
Price
- From $3,937
Deposit
- $500 deposit
Model Rent and Fees
Price
- $3,937 - $6,053
Apartment Model: A2From $3,9371 Bedroom, 1 Bath, 718 sq ftAvailable NowA2 - Floorplan 1 Apartment Unit: 304CApartment Model: A2From $3,9371 Bedroom, 1 Bath, 736 sq ftAvailable NowFrom $3,887
Floorplan A7
1 Bed, 1 Bath, 755 sq ftCheapest 1 BedroomThis is the cheapest 1 Bedroom at this PropertyAvailable May 9Model Gallery
Floorplans
Availability Details
Price Availability Date Unit Sq Ft Deposit $3,887 May 9, 2025 609B 764 $500 $3,887 September 5, 2025 620B 788 $500 Model Amenities and Features
Features
- Balcony
- Intercom
- Wi-Fi
Kitchen
- Kitchen
- Quartz Countertops
Model Rent and Fees
Price Range
- $3,887 - $5,913
Rent Pricing
- $3,887 - $5,913
Deposit
- $500 deposit
Unit 609B Rent and Fees
Price
- From $3,887
Deposit
- $500 deposit
Model Rent and Fees
Price
- $3,887 - $5,913
Unit 620B Rent and Fees
Price
- From $3,887
Deposit
- $500 deposit
Model Rent and Fees
Price
- $3,887 - $5,913
Apartment Model: A7From $3,8871 Bedroom, 1 Bath, 755 sq ftAvailable May 9, 2025A7 - Floorplan 1 Apartment Unit: 609BApartment Model: A7From $3,8871 Bedroom, 1 Bath, 764 sq ftAvailable May 9, 2025Apartment Unit: 620BApartment Model: A7From $3,8871 Bedroom, 1 Bath, 788 sq ftAvailable September 5, 2025From $4,087
Floorplan A3
1 Bed, 1 Bath, 813 sq ftAvailable Jul 8Model Gallery
Floorplans
Availability Details
Price Availability Date Unit Sq Ft Deposit $4,087 July 8, 2025 402C 813 $500 Model Amenities and Features
Features
- Balcony
- Intercom
- Wi-Fi
Kitchen
- Kitchen
- Quartz Countertops
Unit 402C Rent and Fees
Price
- From $4,087
Deposit
- $500 deposit
Model Rent and Fees
Price
- $4,087 - $5,934
Apartment Model: A3From $4,0871 Bedroom, 1 Bath, 813 sq ftAvailable July 8, 2025A3 - Floorplan 1 Apartment Unit: 402CApartment Model: A3From $4,0871 Bedroom, 1 Bath, 813 sq ftAvailable July 8, 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 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 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 Floorplan A10
1 Bed, 1 Bath, 1101 sq ftLargest 1 BedroomThis is the largest 1 Bedroom at this PropertyModel Gallery
Floorplans
Availability Details
Availability Date Unit Sq Ft Deposit Unavailable A10 1101 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: A10Call For Rates1 Bedroom, 1 Bath, 1101 sq ftUnavailableA10 - Floorplan 1 2 Bedrooms
Show Unavailable FloorplansFrom $4,928
Floorplan B6
2 Beds, 2 Baths, 933 sq ftAvailable Jun 22Model Gallery
Floorplans
Availability Details
Price Availability Date Unit Sq Ft Deposit $4,928 June 22, 2025 608B 933 $500 Model Amenities and Features
Features
- Balcony
- Intercom
- Wi-Fi
Kitchen
- Kitchen
- Quartz Countertops
Unit 608B Rent and Fees
Price
- From $4,928
Deposit
- $500 deposit
Model Rent and Fees
Price
- $4,928 - $7,952
Apartment Model: B6From $4,9282 Bedroom, 2 Bath, 933 sq ftAvailable June 22, 2025B6 - Floorplan 1 Apartment Unit: 608BApartment Model: B6From $4,9282 Bedroom, 2 Bath, 933 sq ftAvailable June 22, 2025Floorplan 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 B1
2 Beds, 2 Baths, 977 sq ftModel Gallery
Floorplans
Availability Details
Availability Date Unit Sq Ft Deposit Unavailable B1 977 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: B1Call For Rates2 Bedroom, 2 Bath, 977 sq ftUnavailableB1 - 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 Floorplan B8
2 Beds, 2 Baths, 1221 sq ftLargest 2 BedroomThis is the largest 2 Bedroom at this PropertyModel Gallery
Floorplans
Availability Details
Availability Date Unit Sq Ft Deposit Unavailable B8 1221 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: B8Call For Rates2 Bedroom, 2 Bath, 1221 sq ftUnavailableB8 - 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 - Cats and Dogs
- 2 Pet Limit
- Dogs and Cats
- 100 lb Weight Limit
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 | 10:00 am–6:00 pm |
Tuesday | 10:00 am–6:00 pm |
Wednesday | 10:00 am–6:00 pm |
Thursday | 10:00 am–6:00 pm |
Friday | 10:00 am–6:00 pm |
Saturday | 10:00 am–5:00 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 $3,027 to $7,952
When is the leasing office open?
- The office Hours for Flats on First are
- Monday 10:00 am–6:00 pm
- Tuesday 10:00 am–6:00 pm
- Wednesday 10:00 am–6:00 pm
- Thursday 10:00 am–6:00 pm
- Friday 10:00 am–6:00 pm
- Saturday 10:00 am–5:00 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 | $2,674 | $1,300 | $10,000+ |
Cambridge 1 Bedroom Apartments | $3,199 | $800 | $10,000+ |
Cambridge 2 Bedroom Apartments | $3,761 | $1,225 | $10,000+ |
Cambridge 3 Bedroom Apartments | $4,256 | $900 | $10,000+ |
Cambridge 4 Bedroom Apartments | $5,047 | $700 | $10,000+ |
Cambridge 5 Bedroom Apartments | $5,932 | $775 | $10,000+ |
Cambridge 6 Bedroom Apartments | $7,253 | $775 | $10,000+ |
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