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321 Summer St
Boston, MA 02210
Office Property For Lease · 80,389 SF

Highlights

  • Flexible open floor plates
  • Covered parking
  • Onsite amenities – 24/7 keycard access, tenant fitness center with showers and lockers, bike storage
  • Open windows providing an abundance of natural light
  • Contemporary interior including a brick and beam infrastructure

Property Overview

Located in Boston’s vibrant Fort Point neighborhood in the Seaport, 321 Summer Street offers thoughtfully crafted brick-and-beam office space designed for visionary, forward-thinking organizations. Featuring flexible open floor plates, abundant natural light from oversized windows, and contemporary interiors, the building is tailored to support modern business needs and collaboration. Tenants benefit from scalable technology infrastructure, move-in ready options, and the ability to customize layouts.

  • 24 Hour Access
  • Fitness Center
  • Property Manager on Site

Property Facts

Building Type
Office
Year Built/Renovated
1911/2022
Building Height
8 Stories
Building Size
93,029 SF
Building Class
B
Typical Floor Size
10,700 SF
Unfinished Ceiling Height
12’
Parking
Surface Parking
22 Covered Parking Spaces

Sustainability

Energy Star Certified
81
ENERGY STAR certified buildings save energy and help protect the environment.

Sustainability

ENERGY STAR® Energy Star is a program run by the U.S. Environmental Protection Agency (EPA) and U.S. Department of Energy (DOE) that promotes energy efficiency and provides simple, credible, and unbiased information that consumers and businesses rely on to make well-informed decisions. Thousands of industrial, commercial, utility, state, and local organizations partner with the EPA to deliver cost-saving energy efficiency solutions that protect the climate while improving air quality and protecting public health. The Energy Star score compares a building’s energy performance to similar buildings nationwide and accounts for differences in operating conditions, regional weather data, and other important considerations. Certification is given on an annual basis, so a building must maintain its high performance to be certified year to year. To be eligible for Energy Star certification, a building must earn a score of 75 or higher on EPA’s 1 – 100 scale, indicating that it performs better than at least 75 percent of similar buildings nationwide. This 1 – 100 Energy Star score is based on the actual, measured energy use of a building and is calculated within EPA’s Energy Star Portfolio Manager tool.

  • Listing ID: 6860392

  • Date on Market: 11/10/2025

  • Last Updated:

  • Address: 321 Summer St, Boston, MA 02210

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