About
Prospect Union Square is an apartment community in Somerville’s Union Square neighborhood at 50 Prospect Street. The community includes studio, 1-bedroom, 2-bedroom, and 3-bedroom apartment homes, plus select layouts with a den. Shared spaces include an outdoor pool terrace with daybeds and chaise lounges, outdoor dining spaces with grills, outdoor lounges with firepits, a business lounge with private work rooms, and a secured package room. Everyday extras include a state-of-the-art fitness center with a yoga studio and private training rooms, plus pet-friendly conveniences like an interior dog run and pet wash.
Rent by bedroom
| Home | Starting rent | Floor plans |
|---|---|---|
| Studio429–453 sq ft | From $3,176/mo | 2 |
| 1 Bedroom530–751 sq ft | From $3,232/mo | 9 |
| 2 Bedroom884 sq ft | From $4,916/mo | 1 |
Floor Plans
12 floor plans · 429–884 sq ft.
Current availability is not tracked for this community. Contact the property or visit the official property website for available homes. Floor-plan details describe the community and do not indicate current unit availability.
Studios
2 plans · 429–453 sq ft1 Bedroom
9 plans · 530–751 sq ft2 Bedroom
1 plan · 884 sq ftCosts & fees
These are the charges we have confirmed. They may not be the full list, so no total monthly price is shown — confirm all charges directly with the property.
Charges that apply in some circumstances
Pets & Parking
Leasing Policies
Community Amenities
- Bike storage
- Billiards
- Business lounge
- Chaise lounges
- Close to public transit
- Community dining space
- Firepits
- Fitness center
- Free weights
- Game tables
- Grilling stations
- High-speed internet ready
- Interior dog run
- Lounge with fireplace
- Outdoor dining spaces
- Outdoor lounges
- Outdoor pool terrace
- Package room
- Parking garage
- Pet wash
- Private training rooms
- Private work rooms
- Spin bikes
- Weight machines
- Yoga studio
Unit Features
Neighborhood
What Sets Prospect Union Square Apart
Photos
1 photos.
Request a tour
Request a tour at this community and the leasing office will confirm a time.
The property will confirm the date, time, and tour availability.
Property FAQs
Where is Prospect Union Square located?
What floor plans are available at Prospect Union Square?
What are some of the community amenities?
Is the community pet-friendly, and what pet amenities are available?
Is parking available, and what does it cost?
Which utilities are included, and which are resident-paid?
What is the standard security deposit?
What are the leasing office hours?
How do I schedule a tour?
Common rental questions about Prospect Union Square
Illustrative examples answered from the property's published details — not a record of questions renters have asked, and not a guarantee.
Apartments next to the MBTA Union Square Green Line stop in Somerville — what should I look at?
Prospect Union Square is at 50 Prospect Street in Union Square, with the MBTA Union Square Green Line stop right outside. You can choose from studios, 1-bed/1-bath layouts (including 1-bed + den options), and 2-bed/2-bath homes. It also has a parking garage, bike storage, and a package room.
What apartments near Bow Market in Union Square have a gym and pool?
Prospect Union Square in Somerville’s Union Square neighborhood is close to Bow Market. You’ll have a fitness center with free weights, weight machines, spin bikes, and a yoga studio, plus an outdoor pool terrace and outdoor lounge areas. Apartments include studios through 2-bed/2-bath layouts, and every home has an in-unit washer & dryer.
What Union Square apartments have pet amenities like a dog run and pet wash?
Prospect Union Square in Union Square, Somerville has an interior dog run and a pet wash. Homes range from studios (429–453 sq ft) to 1-bed/1-bath apartments and a 2-bed/2-bath option. Inside, you’ll find GE stainless-steel appliances, quartz countertops, and keyless entry.