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.
Apartment for rent
Special offer
$3,527/mo
21 Charles St #303B, Cambridge, MA 02141
Studio
628sqft
This listing now includes required monthly fees in the total price. Learn more
Apartment
Available Sat Dec 27 2025
Cats, dogs OK
In unit laundry
Garage parking
What's special
- 14 days |
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Zillow last checked: 11 hours ago
Listing updated: December 05, 2025 at 05:16pm
Travel times
Looking to buy when your lease ends?
Consider a first-time homebuyer savings account designed to grow your down payment with up to a 6% match & a competitive APY.
Facts & features
Interior
Bedrooms & bathrooms
- Bedrooms: 0
- Bathrooms: 1
- Full bathrooms: 1
Appliances
- Included: Dryer, Washer
- Laundry: In Unit
Features
- View, Walk-In Closet(s)
- Flooring: Linoleum/Vinyl
Interior area
- Total interior livable area: 628 sqft
Property
Parking
- Parking features: Garage, Parking Lot, Other
- Has garage: Yes
- Details: Contact manager
Features
- Patio & porch: Patio
- Exterior features: Barbecue, Bicycle storage, Co-Working Spaces, Community Kitchen And Dining, Direct Access Entry*, Game Room, Gourmet Kitchens With Stainless Steel Appliances, Groom Room, Landscaped Courtyards With Outdoor Seating, Open Air Amphitheater, Open Floor Plans, Outdoor Lounges With Fire Pits, Package Receiving, Pet Friendly, Quartz Countertops, Schlage Smart Locks, Social Spaces With Complimentary Wifi, Stand-Up Showers*
- Has view: Yes
- View description: City View
Details
- Other equipment: Intercom
Construction
Type & style
- Home type: Apartment
- Property subtype: Apartment
Building
Details
- Building name: Flats on First
Management
- Pets allowed: Yes
Community & HOA
Community
- Features: Fitness Center
HOA
- Amenities included: Fitness Center
Location
- Region: Cambridge
Financial & listing details
- Lease term: 12 Months
Price history
| Date | Event | Price |
|---|---|---|
| 12/2/2025 | Price change | $3,527-6.6%$6/sqft |
Source: Zillow Rentals | ||
| 11/21/2025 | Listed for rent | $3,777+14.3%$6/sqft |
Source: Zillow Rentals | ||
| 4/27/2024 | Listing removed | -- |
Source: Zillow Rentals | ||
| 4/17/2024 | Listed for rent | $3,304+0.2%$5/sqft |
Source: Zillow Rentals | ||
| 7/8/2022 | Listing removed | -- |
Source: Zillow Rental Network Premium_1 | ||
Neighborhood: East Cambridge
There are 8 available units in this apartment building
- Special offer! Receive $1,000 off if you move in by 01/01/2026! *Restrictions apply, please contact the leasing team for details.