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21 Charles St

Cambridge, MA 02141 - Middlesex County

Apartment

Studio-3 beds

1-2 baths

439-1,305 sqft

In-unit laundry

About 21 Charles St

These apartments feature a living room, dining area, and kitchen with quartz countertops, stainless steel appliances, microwave, refrigerator, stove, and a dishwasher. Tile flooring in the bathroom(s) and wood grain vinyl flooring throughout the rest of the home. The bedroom(s) have a closet and the bathroom(s) include a soaking tub. Features central A/C and heating. Select units include hardwood flooring, wheelchair access, direct access entry, stand alone shower, and private balcony/patio. Washer/dryer in home. Cable ready. Community features a rooftop lounge, fitness center, package room, game room, groom room, fire-table, bike storage, pet spa, and controlled access. Pets are welcome. Off street garage parking available.

5 days on RentalSource

RentalSource last checked: 5 days ago · Listing updated: November 9, 2026

Listing data quality - We review listings daily to detect outdated, duplicate, or misleading information.

Property Summary

Property Type:	Apartment
Rental Fee:	$3,161 - $6,399
Bedrooms:	Studio-3 beds
Bathrooms:	1-2 baths
Size:	439-1,305 sqft

Pets:	Inquire
Laundry:	In unit
Parking:	Garage
Available:	Inquire
ID:	84711683

Amenities

Washer/Dryer In Unit
Air Conditioning
Parking
Dishwasher
Balcony/Patio
Bike Storage
Cable/Satellite TV
Controlled Access
Fitness Center
Granite/Quartz Countertops
Hardwood Floors
Microwave
Package Receiving
Pet Spa
Refrigerator
Rooftop Deck
Stainless Steel Appliances
Tile Floors
Vinyl/Laminate Floors
Wheelchair Access

Unit Rates

Name	Beds	Baths	Sqft	Rent
317B	Studio	1	443	$3,161
205B	Studio	1	439	$3,161
404C	1	1	718	$3,817
102C	1	1	896	$4,017
315B	1	1	1,101	$4,874

Leasing Information

Photos are an example of similar units within the building, actual unit may vary. Availability and pricing can change daily and vary by lease term. Please contact us to schedule a showing.

Additional Details

21 Charles St in Cambridge, MA 02141 has studio to 3-bedroom apartments for rent from $3,161 to $6,399 a month. They have 1 to 2 bathrooms and 439 to 1,305 square feet. 21 Charles St was advertised on November 9, 2026.

Affordability Calculator

Can I afford to live at 21 Charles St?

Bedrooms

Studio

Rent-to-income ratio

30%

10% Recommended 50%

Move the slider to select the percentage of your monthly income you're comfortable spending on rent. Typically, it's advised to spend about 30% or less on housing.

Recommended income

$126,440 /year

With your chosen rent-to-income ratio, an annual income of $126,440 is recommended to comfortably afford this studio rental priced at $3,161 per month.

For more information on rent affordability, visit our rent calculator or rent vs. buy calculator.

Commute

How long would the trip to work or school be from here? Add where you go, and see the drive, bike ride or walk from this home and from every home you look at.

Apartment for rent

$3,161 - $6,399

Rent Affordability Calculator

Interested in 21 Charles St?

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Ask About 21 Charles St

21 Charles St, Cambridge, MA 02141 - Apartment for Rent

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