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
$4,946/mo
21 Charles St, # 507B, Cambridge, MA 02141
2beds
909sqft
This listing now includes required monthly fees in the total monthly price. Price shown reflects the lease term provided. Learn more|
Apartment
Available Tue Nov 24 2026
Cats, dogs OK
In unit laundry
Garage parking
What's special
- 10 hours |
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Facts & features
Interior
Bedrooms & bathrooms
- Bedrooms: 2
- Bathrooms: 1
- Full bathrooms: 1
Appliances
- Included: dryer, washer
- Laundry: In Unit
Features
- Storage
- Flooring: Vinyl
Interior area
- Total interior livable area: 909 sqft
Property
Parking
- Parking features: Garage
- Has garage: Yes
- Details: Contact manager
Features
- Patio & porch: Deck, Patio
- Exterior features: 24-Hour Package Room, Barbecue, Co-Working Spaces, Community Kitchen And Dining, Direct Access Entry*, Gourmet Kitchens With Stainless Steel Appliances, Groom Room, Open Air Amphitheater, Open Floor Plans, Outdoor Lounges With Fire Pits, Pet Friendly, Quartz Countertops, Schlage Smart Locks, Social Spaces With Complimentary Wifi, Stand-Up Showers*, Storage, Walk-In Closets*
- Has view: Yes
- View description: Roof Deck With City Views
Lot
- Features: Landscaped, Views
Details
- Additional structures: Garage(s), Storage
- 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, Gated
HOA
- Amenities included: Fitness Center, Game Room, Parking, Roof Deck, Storage
Location
- Region: Cambridge
Financial & listing details
- Lease term: 12 Months
Price history
| Date | Event | Price |
|---|---|---|
| 8/21/2026 | Listed for rent | $4,946+13.6%$5/sqft |
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| 6/10/2023 | Listing removed | -- |
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| 6/8/2023 | Price change | $4,355-2.2%$5/sqft |
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| 5/31/2023 | Price change | $4,455-2.2%$5/sqft |
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| 5/17/2023 | Listed for rent | $4,555$5/sqft |
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| 5/7/2023 | Listing removed | -- |
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| 5/4/2023 | Price change | $4,555+0.8%$5/sqft |
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| 4/27/2023 | Price change | $4,517-1.6%$5/sqft |
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| 4/25/2023 | Price change | $4,592+0.7%$5/sqft |
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| 4/18/2023 | Price change | $4,560-1.6%$5/sqft |
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| 4/3/2023 | Price change | $4,635+2.2%$5/sqft |
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| 3/28/2023 | Price change | $4,535-2.2%$5/sqft |
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| 3/21/2023 | Price change | $4,635+3.3%$5/sqft |
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| 3/17/2023 | Price change | $4,485-3.2%$5/sqft |
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| 3/14/2023 | Price change | $4,635-2.1%$5/sqft |
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| 3/11/2023 | Listed for rent | $4,735+18.4%$5/sqft |
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| 3/10/2022 | Listing removed | -- |
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| 7/22/2021 | Listed for rent | $3,999$4/sqft |
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Neighborhood: East Cambridge
Nearby schools
GreatSchools rating
- 5/10Kennedy-Longfellow SchoolGrades: PK-5Distance: 0.4 mi
- 8/10Vassal Lane Upper SchoolGrades: 6-8Distance: 0.5 mi
- 8/10Cambridge Rindge and Latin SchoolGrades: 9-12Distance: 1.8 mi
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There are 7 available units in this apartment building