Senior Managing Director

Dan Cavanaugh

Executive Vice President

William Foley

Sr. Associate, Brokerage

Nicolette Pope

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.

Lease Description

Exposed brick & beam

Open windows providing an abundance of natural light

Covered parking

Contemporary interior including a brick and beam infrastructure

Onsite amenities – 24/7 keycard access, tenant fitness center with showers and lockers, bike storage

321 Summer

Washington, D.C.

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value="Unclassified"
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Sale - Office - Additional Filters

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Rent - Retail - Additional Filters

title="Size"
disclaimer="Approx. 100 SF = 1 desk"
[[metric]]
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Default - Office - Surface

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value = "active-adult"
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Rent - Multifamily - Additional Filters

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Rent - Default - Price

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value="false"
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Sale Additional Filter

Rent Additional Filters

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value = "creative"
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value = "mixed-use"
label = "Mixed-Use"
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value = "lab"
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[[propertySubTypes.options]]
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value = "light-manufacturing"
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[[propertySubTypes.options]]
value = "freestanding-retail"
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[[propertySubTypes.options]]
value = "showroom"
label = "Showroom"
[[propertySubTypes.options]]
value = "street-retail"
label = "Street Retail"
[[propertySubTypes.options]]
value = "shopping-center"
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[[propertySubTypes.options]]
value = "clinic"
label = "Clinic"
[[propertySubTypes.options]]
value = "warehouse"
label = "Warehouse & Distribution"
[[propertySubTypes.options]]
value = "special-purpose"
label = "Special Purpose"
[[propertySubTypes.options]]
value = "mall"
label = "Mall"
[[propertySubTypes.options]]
value = "light-distribution"
label = "Light Distribution"
[[propertySubTypes.options]]
value = "student-housing"
label = "Student Housing"
[[propertySubTypes.options]]
value = "conventional"
label = "Conventional"

Sale - Industrial - Additional Filters

Rent - Office - Additional Filters

Sale - Retail - Additional Filters

Rent - Industrial - Additional Filters

[buildingClasses]
title="Building Class"
[[buildingClasses.options]]
value="Trophy"
label="Trophy"
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value="A"
label="A"
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value="C"
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value="Unclassified"
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title="Sublease"
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value="true"
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value="false"
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[[propertySubTypes.options]]
value = "condo"
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[[propertySubTypes.options]]
value = "active-adult"
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Sale - Multifamily - Additional Filters

[buildingClasses]
title="Building Class"
[[buildingClasses.options]]
value="Trophy"
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[[buildingClasses.options]]
value="A"
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value="C"
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value="Unclassified"
label="Unclassified"
[isSublease]
title="Sublease"
[[isSublease.options]]
value="true"
label="Yes"
[[isSublease.options]]
value="false"
label="No"

Default - Default- Additional Filters

title="Size"
disclaimer=""
[[metric]]
key = "acres"
tabLabel = "acres"
unitLabel= "ac"

[min]
[min.1]  
value=0.1
[min.2]  
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[min.3]  
acres=0.25
value=0.25
[min.4]  
acres=0.5
value=0.5
[min.5]
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[min.6]  
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[min.7]
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[min.8]
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[max]
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[max.10]
acres=5
value=5
[max.11]
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value=10

Default - Land - Lot Size

title="Size"
disclaimer=""
[[metric]]
key = "feet"
tabLabel = "SF"
unitLabel= "SF"

[min]
[min.50]  
  feet=50
  value=50
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[min.500]
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  value=500
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  value=1000
[min.2000]
  feet="2,000"
  value=2000
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  feet="5,000"
  value=5000
[min.7000]
  feet="7,000"
  value=7000
[min.10000]
  feet="10,000"
  value=10000
[min.20000]
  feet="20,000"
  value=20000
[min.30000]
  feet="30,000"
  value=30000
[min.50000]
  feet="50,000"
  value=50000
[min.70000]
  feet="70,000"
  value=70000
[min.100000]
  feet="100,000"
  value=100000
[min.250000]
  feet="250,000"
  value=250000

[max]
[max.5]  
  feet=50
  value=50
[max.200]
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Default - Default - Surface

title="Price"
metric="label"
unitLabel=" "
[min]
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Default - Default - Price

Market Property Inquiry

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321 Summer

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