• Broker Christopher Scott 6179514135

Seaport Circle 777 Congress St

30,417 - 646,969 SF of 4-Star Office Space Available in Boston, MA 02210

View Photo

HIGHLIGHTS

  • Life Science Development
  • Roof Deck With Harbor Views
  • Premium, Purpose-Built Lab Space
  • Direct Silver Line Access (On-Site MBTA Station)

ALL AVAILABLE SPACES(11)

Display Rent as

  • SPACE
  • SIZE
  • TERM
  • RENT
  • SPACE USE
  • CONDITION
  • AVAILABLE
  • 2nd Floor
  • 36,531-55,599 SF
  • Negotiable
  • Upon Application
  • Office
  • Partial Build-Out
  • 01/07/2026

36,531 sf of office/lab space available for lease.

  • Partially Built-Out as Research and Development Space
  • Fits 92 - 445 People
  • Can be combined with additional space(s) for up to 646,969 SF of adjacent space
  • Laboratory
  • Office/Lab space
  • Mostly Open Floor Plan Layout
  • Space is in Excellent Condition
  • Central Air and Heating
  • New construction
  • 3rd Floor
  • 37,000-72,730 SF
  • Negotiable
  • Upon Application
  • Office
  • Partial Build-Out
  • 01/07/2026

72, 730sf of office/lab space available for lease.

  • Partially Built-Out as Research and Development Space
  • Fits 93 - 582 People
  • Can be combined with additional space(s) for up to 646,969 SF of adjacent space
  • Laboratory
  • Office/Lab space
  • Mostly Open Floor Plan Layout
  • Space is in Excellent Condition
  • Central Air and Heating
  • New construction
  • 4th Floor
  • 37,000-73,709 SF
  • Negotiable
  • Upon Application
  • Office
  • Partial Build-Out
  • 01/07/2026

73,709sf of office/lab space available for lease.

  • Partially Built-Out as Research and Development Space
  • Fits 93 - 590 People
  • Can be combined with additional space(s) for up to 646,969 SF of adjacent space
  • Laboratory
  • Office/Lab space
  • Mostly Open Floor Plan Layout
  • Space is in Excellent Condition
  • Central Air and Heating
  • New construction
  • 5th Floor
  • 37,000-73,865 SF
  • Negotiable
  • Upon Application
  • Office
  • Partial Build-Out
  • 01/07/2026

73,865sf of office/lab space available for lease.

  • Partially Built-Out as Research and Development Space
  • Fits 93 - 591 People
  • Can be combined with additional space(s) for up to 646,969 SF of adjacent space
  • Laboratory
  • Office/Lab space
  • Mostly Open Floor Plan Layout
  • Space is in Excellent Condition
  • Central Air and Heating
  • New construction
  • 6th Floor
  • 37,000-73,712 SF
  • Negotiable
  • Upon Application
  • Office
  • Partial Build-Out
  • 01/07/2026

73,712sf of office/lab space available for lease.

  • Partially Built-Out as Research and Development Space
  • Fits 93 - 590 People
  • Can be combined with additional space(s) for up to 646,969 SF of adjacent space
  • Laboratory
  • Office/Lab space
  • Mostly Open Floor Plan Layout
  • Space is in Excellent Condition
  • Central Air and Heating
  • New construction
  • 7th Floor
  • 37,000-72,170 SF
  • Negotiable
  • Upon Application
  • Office
  • Partial Build-Out
  • 01/07/2026

72,170sf of office/lab space available for lease.

  • Partially Built-Out as Research and Development Space
  • Fits 93 - 578 People
  • Can be combined with additional space(s) for up to 646,969 SF of adjacent space
  • Laboratory
  • Office/Lab space
  • Mostly Open Floor Plan Layout
  • Space is in Excellent Condition
  • Central Air and Heating
  • New construction
  • 8th Floor
  • 37,000-71,925 SF
  • Negotiable
  • Upon Application
  • Office
  • Partial Build-Out
  • 01/07/2026

71,925sf of office/lab space available for lease.

  • Partially Built-Out as Research and Development Space
  • Fits 93 - 576 People
  • Can be combined with additional space(s) for up to 646,969 SF of adjacent space
  • Laboratory
  • Office/Lab space
  • Mostly Open Floor Plan Layout
  • Space is in Excellent Condition
  • Central Air and Heating
  • New construction
  • 9th Floor
  • 37,000-56,089 SF
  • Negotiable
  • Upon Application
  • Office
  • Partial Build-Out
  • 01/07/2026

56,089sf of office/lab space available for lease.

  • Partially Built-Out as Research and Development Space
  • Fits 93 - 449 People
  • Can be combined with additional space(s) for up to 646,969 SF of adjacent space
  • Laboratory
  • Office/Lab space
  • Mostly Open Floor Plan Layout
  • Space is in Excellent Condition
  • Central Air and Heating
  • New construction
  • 10th Floor
  • 36,332 SF
  • Negotiable
  • Upon Application
  • Office
  • Partial Build-Out
  • 01/07/2026

13,039sf of office/lab space available for lease.

  • Partially Built-Out as Research and Development Space
  • Fits 91 - 291 People
  • Can be combined with additional space(s) for up to 646,969 SF of adjacent space
  • Laboratory
  • Office/Lab space
  • Mostly Open Floor Plan Layout
  • Space is in Excellent Condition
  • Central Air and Heating
  • New construction
  • 11th Floor
  • 30,421 SF
  • Negotiable
  • Upon Application
  • Office
  • Partial Build-Out
  • 01/07/2026

30,421sf of office/lab space available for lease.

  • Partially Built-Out as Research and Development Space
  • Fits 77 - 244 People
  • Can be combined with additional space(s) for up to 646,969 SF of adjacent space
  • Laboratory
  • Office/Lab space
  • Mostly Open Floor Plan Layout
  • Space is in Excellent Condition
  • Central Air and Heating
  • New construction
  • 12th Floor
  • 30,417 SF
  • Negotiable
  • Upon Application
  • Office
  • Partial Build-Out
  • 01/07/2026

30,417sf of office/lab space available for lease.

  • Partially Built-Out as Research and Development Space
  • Fits 77 - 244 People
  • Can be combined with additional space(s) for up to 646,969 SF of adjacent space
  • Laboratory
  • Office/Lab space
  • Mostly Open Floor Plan Layout
  • Space is in Excellent Condition
  • Central Air and Heating
  • New construction
Space Size Term Rent Space Use Condition Available
2nd Floor 36,531-55,599 SF Negotiable Upon Application Office Partial Build-Out 01/07/2026
3rd Floor 37,000-72,730 SF Negotiable Upon Application Office Partial Build-Out 01/07/2026
4th Floor 37,000-73,709 SF Negotiable Upon Application Office Partial Build-Out 01/07/2026
5th Floor 37,000-73,865 SF Negotiable Upon Application Office Partial Build-Out 01/07/2026
6th Floor 37,000-73,712 SF Negotiable Upon Application Office Partial Build-Out 01/07/2026
7th Floor 37,000-72,170 SF Negotiable Upon Application Office Partial Build-Out 01/07/2026
8th Floor 37,000-71,925 SF Negotiable Upon Application Office Partial Build-Out 01/07/2026
9th Floor 37,000-56,089 SF Negotiable Upon Application Office Partial Build-Out 01/07/2026
10th Floor 36,332 SF Negotiable Upon Application Office Partial Build-Out 01/07/2026
11th Floor 30,421 SF Negotiable Upon Application Office Partial Build-Out 01/07/2026
12th Floor 30,417 SF Negotiable Upon Application Office Partial Build-Out 01/07/2026

2nd Floor

Size
36,531-55,599 SF
Term
Negotiable
Rent
Upon Application
Space Use
Office
Condition
Partial Build-Out
Available
01/07/2026

3rd Floor

Size
37,000-72,730 SF
Term
Negotiable
Rent
Upon Application
Space Use
Office
Condition
Partial Build-Out
Available
01/07/2026

4th Floor

Size
37,000-73,709 SF
Term
Negotiable
Rent
Upon Application
Space Use
Office
Condition
Partial Build-Out
Available
01/07/2026

5th Floor

Size
37,000-73,865 SF
Term
Negotiable
Rent
Upon Application
Space Use
Office
Condition
Partial Build-Out
Available
01/07/2026

6th Floor

Size
37,000-73,712 SF
Term
Negotiable
Rent
Upon Application
Space Use
Office
Condition
Partial Build-Out
Available
01/07/2026

7th Floor

Size
37,000-72,170 SF
Term
Negotiable
Rent
Upon Application
Space Use
Office
Condition
Partial Build-Out
Available
01/07/2026

8th Floor

Size
37,000-71,925 SF
Term
Negotiable
Rent
Upon Application
Space Use
Office
Condition
Partial Build-Out
Available
01/07/2026

9th Floor

Size
37,000-56,089 SF
Term
Negotiable
Rent
Upon Application
Space Use
Office
Condition
Partial Build-Out
Available
01/07/2026

10th Floor

Size
36,332 SF
Term
Negotiable
Rent
Upon Application
Space Use
Office
Condition
Partial Build-Out
Available
01/07/2026

11th Floor

Size
30,421 SF
Term
Negotiable
Rent
Upon Application
Space Use
Office
Condition
Partial Build-Out
Available
01/07/2026

12th Floor

Size
30,417 SF
Term
Negotiable
Rent
Upon Application
Space Use
Office
Condition
Partial Build-Out
Available
01/07/2026

PROPERTY OVERVIEW

Seaport Circle is a mixed-use development featuring 650,000 square feet of life science research and office space in Boston's most prominent life science cluster. The project is pursuing LEED Platinum designation, with a 90% reduction in natural gas use. The two-tower design will provide flexible floor plates ranging from 25,000-75,000 square feet. In addition to state-of-the-art Class A lab and office space, the building will include best-in-class tenant amenity spaces and approximately 5,000 square feet of retail space. Seaport Circle will also include a 15,000 SF stand-alone South Boston Waterfront Job Training Pavilion (the Pavilion) with an ambitious mission focused on training for skilled jobs in life sciences and adding talent to the pipeline of opportunity in the Boston area’s exploding life science sector.

  • Reception
  • Central Heating
  • Lift Access
  • Air Conditioning

PROPERTY FACTS

Building Type
Office
Year Built
2026
LoopNet Rating
4 Star
Number of Floors
12
Building Size
646,969 SF
Building Class
A
Typical Floor Size
53,914 SF
Unfinished Ceiling Height
15 ft
Parking
73 Covered Parking Spaces

ATTACHMENTS

2024_07_30_LPC_SeaportCircle_LeasingPresentation

LINKS

Walk Score®
Very Walkable (75)

Map of 777 Congress St Boston, MA 02210

ADDITIONAL PHOTOS

View Photo Seaport Circle
View Photo Amenity Lounge
View Photo Lab Space
View Photo Lab Space
View Photo Fitness Center
View Photo Roof Deck
View Photo Roof Deck Views

The LoopNet service and information provided therein, while believed to be accurate, are provided "as is". LoopNet disclaims any and all representations, warranties, or guarantees of any kind.