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- Studio–3 Bedrooms
- $3,427-$5,709Total Monthly Price
- 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*
- First Month's Rent Deposit
- 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
- Monthly Sewer Fee
- MONTHLY WATER FEE
- Open Air Amphitheater
- Open floor plans
- Outdoor lounges with fire pits
- Personal Liability Insurance
- Personal Liability Renters Insurance
- 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 $3,427 and having 439–1,303 sq ft. Here is the current pricing and availability:
New! Interactive Property Map
Studio
Show Unavailable FloorplansFloorplan S1
From $3,427
Studio, 1 Bath, 439 sq ftTotal Monthly PriceAvailable Dec 5Model Gallery
Floorplans
Availability Details
Price Availability Date Unit Sq Ft Deposit $3,427 December 5, 2025 316B 440 $500 Model Amenities and Features
Features
- Balcony
- Intercom
- Wi-Fi
Kitchen
- Kitchen
- Quartz Countertops
Unit 316B Lease Information
Unit Price
- $3,427
Deposit
- $500 deposit
Model Rent and Fees
Model Price Range
- $3,427 - $4,464
Apartment Model: S1From $3,427Studio, 1 Bath, 439 sq ftAvailable December 5, 2025![]()
S1 - Floorplan 1 Apartment Unit: 316BApartment Model: S1$3,427Studio, 1 Bath, 440 sq ftAvailable December 5, 2025Floorplan S2
Studio, 1 Bath, 584 sq ftModel Gallery
Floorplans
Availability Details
Availability Date Unit Sq Ft Call for Availability S2 584 sq ft Model Amenities and Features
Features
- Balcony
- Intercom
- Wi-Fi
Kitchen
- Kitchen
- Quartz Countertops
Apartment Model: S2Call For RatesStudio, 1 Bath, 584 sq ftUnavailable![]()
S2 - Floorplan 1 Floorplan S3
Studio, 1 Bath, 627 sq ftLargest StudioThis is the largest Studio at this PropertyModel Gallery
Floorplans
Availability Details
Availability Date Unit Sq Ft Call for Availability S3 627 sq ft Model Amenities and Features
Features
- Balcony
- Intercom
- Wi-Fi
Kitchen
- Kitchen
- Quartz Countertops
Apartment Model: S3Call For RatesStudio, 1 Bath, 627 sq ftUnavailable![]()
S3 - Floorplan 1 1 Bedroom
Show Unavailable FloorplansFloorplan A1
From $3,574
1 Bed, 1 Bath, 699 sq ftTotal Monthly PriceAvailable NowCheapest 1 BedroomThis is the cheapest 1 Bedroom at this PropertyModel Gallery
Floorplans
Availability Details
Price Availability Date Unit Sq Ft Deposit $3,574 Available Now 303C 699 $500 Model Amenities and Features
Features
- Balcony
- Intercom
- Wi-Fi
Kitchen
- Kitchen
- Quartz Countertops
Unit 303C Lease Information
Unit Price
- $3,574
Deposit
- $500 deposit
Model Rent and Fees
Model Price Range
- $3,574 - $4,867
Apartment Model: A1From $3,5741 Bedroom, 1 Bath, 699 sq ftAvailable Now![]()
A1 - Floorplan 1 Apartment Unit: 303CApartment Model: A1$3,5741 Bedroom, 1 Bath, 699 sq ftAvailable NowFloorplan A9
From $4,603
1 Bed, 1 Bath, 914 sq ftTotal Monthly PriceAvailable Nov 10Model Gallery
Floorplans
Availability Details
Price Availability Date Unit Sq Ft Deposit $4,603 November 10, 2025 213B 914 $500 Model Amenities and Features
Features
- Balcony
- Intercom
- Wi-Fi
Kitchen
- Kitchen
- Quartz Countertops
Unit 213B Lease Information
Unit Price
- $4,603
Deposit
- $500 deposit
Model Rent and Fees
Model Price Range
- $4,603 - $6,039
Apartment Model: A9From $4,6031 Bedroom, 1 Bath, 914 sq ftAvailable November 10, 2025![]()
A9 - Floorplan 1 Apartment Unit: 213BApartment Model: A9$4,6031 Bedroom, 1 Bath, 914 sq ftAvailable November 10, 2025Floorplan A4H
From $4,078
1 Bed, 1 Bath, 896 sq ftTotal Monthly PriceAvailable Dec 14Model Gallery
Floorplans
Availability Details
Price Availability Date Unit Sq Ft Deposit $4,078 December 14, 2025 102C 896 $500 Model Amenities and Features
Features
- Balcony
- Intercom
- Wi-Fi
Kitchen
- Kitchen
- Quartz Countertops
Unit 102C Lease Information
Unit Price
- $4,078
Deposit
- $500 deposit
Model Rent and Fees
Model Price Range
- $4,078 - $5,059
Apartment Model: A4HFrom $4,0781 Bedroom, 1 Bath, 896 sq ftAvailable December 14, 2025![]()
A4H - Floorplan 1 Apartment Unit: 102CApartment Model: A4H$4,0781 Bedroom, 1 Bath, 896 sq ftAvailable December 14, 2025Floorplan A2
1 Bed, 1 Bath, 718 sq ftModel Gallery
Floorplans
Availability Details
Availability Date Unit Sq Ft Call for Availability A2 718 sq ft Model Amenities and Features
Features
- Balcony
- Intercom
- Wi-Fi
Kitchen
- Kitchen
- Quartz Countertops
Apartment Model: A2Call For Rates1 Bedroom, 1 Bath, 718 sq ftUnavailable![]()
A2 - Floorplan 1 Floorplan A6
1 Bed, 1 Bath, 747 sq ftModel Gallery
Floorplans
Availability Details
Availability Date Unit Sq Ft Call for Availability A6 747 sq ft Model Amenities and Features
Features
- Balcony
- Intercom
- Wi-Fi
Kitchen
- Kitchen
- Quartz Countertops
Apartment Model: A6Call For Rates1 Bedroom, 1 Bath, 747 sq ftUnavailable![]()
A6 - Floorplan 1 Floorplan A7
1 Bed, 1 Bath, 755 sq ftModel Gallery
Floorplans
Availability Details
Availability Date Unit Sq Ft Call for Availability A7 755 sq ft Model Amenities and Features
Features
- Balcony
- Intercom
- Wi-Fi
Kitchen
- Kitchen
- Quartz Countertops
Apartment Model: A7Call For Rates1 Bedroom, 1 Bath, 755 sq ftUnavailable![]()
A7 - Floorplan 1 Floorplan A7H
1 Bed, 1 Bath, 767 sq ftModel Gallery
Floorplans
Availability Details
Availability Date Unit Sq Ft Call for Availability A7H 767 sq ft Model Amenities and Features
Features
- Balcony
- Intercom
- Wi-Fi
Kitchen
- Kitchen
- Quartz Countertops
Apartment Model: A7HCall For Rates1 Bedroom, 1 Bath, 767 sq ftUnavailable![]()
A7H - Floorplan 1 Floorplan A8
1 Bed, 1 Bath, 794 sq ftModel Gallery
Floorplans
Availability Details
Availability Date Unit Sq Ft Call for Availability A8 794 sq ft Model Amenities and Features
Features
- Balcony
- Intercom
- Wi-Fi
Kitchen
- Kitchen
- Quartz Countertops
Apartment Model: A8Call For Rates1 Bedroom, 1 Bath, 794 sq ftUnavailable![]()
A8 - Floorplan 1 Floorplan A3
1 Bed, 1 Bath, 813 sq ftModel Gallery
Floorplans
Availability Details
Availability Date Unit Sq Ft Call for Availability A3 813 sq ft Model Amenities and Features
Features
- Balcony
- Intercom
- Wi-Fi
Kitchen
- Kitchen
- Quartz Countertops
Apartment Model: A3Call For Rates1 Bedroom, 1 Bath, 813 sq ftUnavailable![]()
A3 - Floorplan 1 Floorplan A5
1 Bed, 1 Bath, 897 sq ftModel Gallery
Floorplans
Availability Details
Availability Date Unit Sq Ft Call for Availability A5 897 sq ft Model Amenities and Features
Features
- Balcony
- Intercom
- Wi-Fi
Kitchen
- Kitchen
- Quartz Countertops
Apartment Model: A5Call For Rates1 Bedroom, 1 Bath, 897 sq ftUnavailable![]()
A5 - 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 Call for Availability A10 1101 sq ft Model Amenities and Features
Features
- Balcony
- Intercom
- Wi-Fi
Kitchen
- Kitchen
- Quartz Countertops
Apartment Model: A10Call For Rates1 Bedroom, 1 Bath, 1101 sq ftUnavailable![]()
A10 - Floorplan 1 2 Bedrooms
Show Unavailable FloorplansFloorplan B8
From $5,709
2 Beds, 2 Baths, 1221 sq ftTotal Monthly PriceAvailable January 10, 2026Largest 2 BedroomThis is the largest 2 Bedroom at this PropertyModel Gallery
Floorplans
Availability Details
Price Availability Date Unit Sq Ft Deposit $5,709 January 10, 2026 514B 1221 $500 Model Amenities and Features
Features
- Balcony
- Intercom
- Wi-Fi
Kitchen
- Kitchen
- Quartz Countertops
Unit 514B Lease Information
Unit Price
- $5,709
Deposit
- $500 deposit
Model Rent and Fees
Model Price Range
- $5,709 - $7,681
Apartment Model: B8From $5,7092 Bedroom, 2 Bath, 1221 sq ftAvailable January 10, 2026![]()
B8 - Floorplan 1 Apartment Unit: 514BApartment Model: B8$5,7092 Bedroom, 2 Bath, 1221 sq ftAvailable January 10, 2026Floorplan B5
2 Beds, 1 Bath, 909 sq ftModel Gallery
Floorplans
Availability Details
Availability Date Unit Sq Ft Call for Availability B5 909 sq ft Model Amenities and Features
Features
- Balcony
- Intercom
- Wi-Fi
Kitchen
- Kitchen
- Quartz Countertops
Apartment Model: B5Call For Rates2 Bedroom, 1 Bath, 909 sq ftUnavailable![]()
B5 - Floorplan 1 Floorplan B6
2 Beds, 2 Baths, 933 sq ftModel Gallery
Floorplans
Availability Details
Availability Date Unit Sq Ft Call for Availability B6 933 sq ft Model Amenities and Features
Features
- Balcony
- Intercom
- Wi-Fi
Kitchen
- Kitchen
- Quartz Countertops
Apartment Model: B6Call For Rates2 Bedroom, 2 Bath, 933 sq ftUnavailable![]()
B6 - Floorplan 1 Floorplan B1
2 Beds, 2 Baths, 977 sq ftModel Gallery
Floorplans
Availability Details
Availability Date Unit Sq Ft Call for Availability B1 977 sq ft Model Amenities and Features
Features
- Balcony
- Intercom
- Wi-Fi
Kitchen
- Kitchen
- Quartz Countertops
Apartment Model: B1Call For Rates2 Bedroom, 2 Bath, 977 sq ftUnavailable![]()
B1 - Floorplan 1 Floorplan B7
2 Beds, 2 Baths, 1050 sq ftModel Gallery
Floorplans
Availability Details
Availability Date Unit Sq Ft Call for Availability B7 1050 sq ft Model Amenities and Features
Features
- Balcony
- Intercom
- Wi-Fi
Kitchen
- Kitchen
- Quartz Countertops
Apartment Model: B7Call For Rates2 Bedroom, 2 Bath, 1050 sq ftUnavailable![]()
B7 - Floorplan 1 Floorplan B2
2 Beds, 2 Baths, 1149 sq ftModel Gallery
Floorplans
Availability Details
Availability Date Unit Sq Ft Call for Availability B2 1149 sq ft Model Amenities and Features
Features
- Balcony
- Intercom
- Wi-Fi
Kitchen
- Kitchen
- Quartz Countertops
Apartment Model: B2Call For Rates2 Bedroom, 2 Bath, 1149 sq ftUnavailable![]()
B2 - Floorplan 1 Floorplan B3
2 Beds, 2 Baths, 1152 sq ftModel Gallery
Floorplans
Availability Details
Availability Date Unit Sq Ft Call for Availability B3 1152 sq ft Model Amenities and Features
Features
- Balcony
- Intercom
- Wi-Fi
Kitchen
- Kitchen
- Quartz Countertops
Apartment Model: B3Call For Rates2 Bedroom, 2 Bath, 1152 sq ftUnavailable![]()
B3 - Floorplan 1 Floorplan B4
2 Beds, 2 Baths, 1204 sq ftModel Gallery
Floorplans
Availability Details
Availability Date Unit Sq Ft Call for Availability B4 1204 sq ft Model Amenities and Features
Features
- Balcony
- Intercom
- Wi-Fi
Kitchen
- Kitchen
- Quartz Countertops
Apartment Model: B4Call For Rates2 Bedroom, 2 Bath, 1204 sq ftUnavailable![]()
B4 - Floorplan 1 3 Bedrooms
Floorplan C1
3 Beds, 2 Baths, 1303 sq ftModel Gallery
Floorplans
Availability Details
Availability Date Unit Sq Ft Call for Availability C1 1303 sq ft Model Amenities and Features
Features
- Balcony
- Intercom
- Wi-Fi
Kitchen
- Kitchen
- Quartz Countertops
Apartment Model: C1Call For Rates3 Bedroom, 2 Bath, 1303 sq ftUnavailable![]()
C1 - Floorplan 1
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Property Information
- 136 Units
- 5 Stories
- Built in 2021
- View Property Website
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Fees and Policies
The fees below are based on community-supplied data and may exclude additional fees and utilities.
Required Fees
One-Time Move-In Fees
- Due at Move-In
- Security DepositiOr up to 1 months rent based on application screening results$500
- First Month's Rent DepositiCredited toward the required first month's rentVaries
Utilities & Essentials
- Monthly Electric/Gas FeeiYou may be required to obtain applicable utilities independentlyVaries
- Personal Liability InsuranceiObtain independent policy or use recommended insurerVaries
- Monthly Sewer FeeiMonthly Water FeeVaries
- Monthly Water FeeiMonthly Water FeeVaries
Other Fees
Personal Add-Ons
- Garage RentaliGarage Rent$175/mo
- Pet Renti$60 per cat. $85 per dog. 2 pet maximum.$50-$170/mo
- Personal Liability Renters InsuranceiRecommended insurer if not submitting independent policy.$18.75/mo
Situational Fees
- Key Fob ReplacementiKey Fob Replacement$5-$50/per occurrence
- Month-to-Month FeeiMonth-to-Month Fee$700/per occurrence
- Late FeeiApplied to rent over 30 days past dueVaries
- NSF FeeiReturned check or rejected electronic payment fee$50/per occurrence
- Additional Security DepositiUp to 1 months rent based on application screening resultsVaries
- Lease Buy Out FeeiLease Buy Out FeeVaries
- Automatic Renters Insurance (If coverage lapses)iPersonal liability renters insurance applied if previously obtained coverage lapses.$15/mo
- Court FeeiLegal/Eviction FeeVaries
- Legal/Eviction FeeiLegal/Eviction FeeVaries
- Move Out Fob FeeiKey fob unreturned/lost at move-out.$50/per occurrence
- Move Out Cleaning FeeiUnit returned unclean at move-outVaries
- Move Out Damage FeeiFee for damages found at move-outVaries
Pet Policy and Fees
Cats
- Fees Not Specified
- 100 Lb Weight Limit
Dogs
- Fees Not Specified
- 100 Lb Weight Limit
Others
- Fees Not Specified
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.
Features and Amenities
On-Site Services
- Package Service
Community Features
- Lounge
Outdoor Features
- Courtyard
- Controlled Access
- Deck
Recreation and Fitness
- Fitness Center
- Bicycle Storage
- Gameroom
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 $3,427 to $5,709
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?
Call us today to find out our pet policy and if we allow pets
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
Petco
Walgreens
Macy's
Colleges and Universities
Groceries
Star Market
Whole Foods
Trader Joe's
Hospitals
Military Bases
Boston Support Center
Hanscom Air Force Base
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
Community College Station-Orange Line
Nearby Neighborhoods
Rental Price Ranges in the Area
| Bedroom | Average Price | Cheapest Price | Highest Price |
|---|---|---|---|
| Cambridge Studio Apartments | $2,704 | $1,200 | $7,751 |
| Cambridge 1 Bedroom Apartments | $3,109 | $950 | $10,000+ |
| Cambridge 2 Bedroom Apartments | $3,742 | $375 | $10,000+ |
| Cambridge 3 Bedroom Apartments | $4,194 | $995 | $10,000+ |
| Cambridge 4 Bedroom Apartments | $5,120 | $1,200 | $10,000+ |
| Cambridge 5 Bedroom Apartments | $6,275 | $975 | $10,000+ |
| Cambridge 6 Bedroom Apartments | $8,235 | $1,150 | $10,000+ |
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