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45 Sidney St 18,375 - 139,216 SF of Office Space Available in Cambridge, MA 02139

Office Spaces Massachusetts Cambridge 45 Sidney St, Cambridge, MA 02139

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Sublease Highlights

  • Heavy daytime foot traffic.
  • Walking distance from MIT.

All Available Spaces(5)

Display Rental Rate as

  • Space
  • Size
  • Term
  • Rental Rate
  • Space Use
  • Build-Out
  • Available
  • 1st Floor
  • 18,375 SF
  • Nov 2029
  • Upon Request Upon Request Upon Request Upon Request
  • Office
  • Full Build-Out
  • Now

Office space available for lease.

  • Sublease space available from current tenant
  • Central Air and Heating
  • Located in heart if Cambridge.
  • Fully Built-Out as Standard Office
  • Natural Light
  • 5 Minutes from interstate 90.
  • 2nd Floor
  • 30,037 SF
  • Nov 2029
  • Upon Request Upon Request Upon Request Upon Request
  • Office
  • Full Build-Out
  • Now

Office space available for lease.

  • Sublease space available from current tenant
  • Mostly Open Floor Plan Layout
  • City views.
  • Fully Built-Out as Standard Office
  • Central Air and Heating
  • 3rd Floor
  • 30,816 SF
  • Nov 2029
  • Upon Request Upon Request Upon Request Upon Request
  • Office
  • Full Build-Out
  • Now

Office space available for lease.

  • Sublease space available from current tenant
  • Mostly Open Floor Plan Layout
  • Natural Light
  • Located in heart of Cambridge.
  • Fully Built-Out as Standard Office
  • Central Air and Heating
  • Walking distance from MIT.
  • 4th Floor
  • 30,101 SF
  • Nov 2029
  • Upon Request Upon Request Upon Request Upon Request
  • Office
  • Full Build-Out
  • Now

Office space available for lease.

  • Sublease space available from current tenant
  • Mostly Open Floor Plan Layout
  • Natural Light
  • Located in heart of Cambridge.
  • Fully Built-Out as Standard Office
  • Central Air and Heating
  • City views.
  • 5th Floor
  • 29,887 SF
  • Nov 2029
  • Upon Request Upon Request Upon Request Upon Request
  • Office
  • Full Build-Out
  • Now

Office space available for lease.

  • Sublease space available from current tenant
  • Mostly Open Floor Plan Layout
  • Natural Light
  • Located in heart of Cambridge.
  • Fully Built-Out as Standard Office
  • Central Air and Heating
  • City views.
Space Size Term Rental Rate Space Use Build-Out Available
1st Floor 18,375 SF Nov 2029 Upon Request Upon Request Upon Request Upon Request Office Full Build-Out Now
2nd Floor 30,037 SF Nov 2029 Upon Request Upon Request Upon Request Upon Request Office Full Build-Out Now
3rd Floor 30,816 SF Nov 2029 Upon Request Upon Request Upon Request Upon Request Office Full Build-Out Now
4th Floor 30,101 SF Nov 2029 Upon Request Upon Request Upon Request Upon Request Office Full Build-Out Now
5th Floor 29,887 SF Nov 2029 Upon Request Upon Request Upon Request Upon Request Office Full Build-Out Now

1st Floor

Size
18,375 SF
Term
Nov 2029
Rental Rate
Upon Request Upon Request Upon Request Upon Request
Space Use
Office
Build-Out
Full Build-Out
Available
Now

2nd Floor

Size
30,037 SF
Term
Nov 2029
Rental Rate
Upon Request Upon Request Upon Request Upon Request
Space Use
Office
Build-Out
Full Build-Out
Available
Now

3rd Floor

Size
30,816 SF
Term
Nov 2029
Rental Rate
Upon Request Upon Request Upon Request Upon Request
Space Use
Office
Build-Out
Full Build-Out
Available
Now

4th Floor

Size
30,101 SF
Term
Nov 2029
Rental Rate
Upon Request Upon Request Upon Request Upon Request
Space Use
Office
Build-Out
Full Build-Out
Available
Now

5th Floor

Size
29,887 SF
Term
Nov 2029
Rental Rate
Upon Request Upon Request Upon Request Upon Request
Space Use
Office
Build-Out
Full Build-Out
Available
Now

1st Floor

Size 18,375 SF
Term Nov 2029
Rental Rate Upon Request
Space Use Office
Build-Out Full Build-Out
Available Now

Office space available for lease.

  • Sublease space available from current tenant
  • Fully Built-Out as Standard Office
  • Central Air and Heating
  • Natural Light
  • Located in heart if Cambridge.
  • 5 Minutes from interstate 90.

2nd Floor

Size 30,037 SF
Term Nov 2029
Rental Rate Upon Request
Space Use Office
Build-Out Full Build-Out
Available Now

Office space available for lease.

  • Sublease space available from current tenant
  • Fully Built-Out as Standard Office
  • Mostly Open Floor Plan Layout
  • Central Air and Heating
  • City views.

3rd Floor

Size 30,816 SF
Term Nov 2029
Rental Rate Upon Request
Space Use Office
Build-Out Full Build-Out
Available Now

Office space available for lease.

  • Sublease space available from current tenant
  • Fully Built-Out as Standard Office
  • Mostly Open Floor Plan Layout
  • Central Air and Heating
  • Natural Light
  • Walking distance from MIT.
  • Located in heart of Cambridge.

4th Floor

Size 30,101 SF
Term Nov 2029
Rental Rate Upon Request
Space Use Office
Build-Out Full Build-Out
Available Now

Office space available for lease.

  • Sublease space available from current tenant
  • Fully Built-Out as Standard Office
  • Mostly Open Floor Plan Layout
  • Central Air and Heating
  • Natural Light
  • City views.
  • Located in heart of Cambridge.

5th Floor

Size 29,887 SF
Term Nov 2029
Rental Rate Upon Request
Space Use Office
Build-Out Full Build-Out
Available Now

Office space available for lease.

  • Sublease space available from current tenant
  • Fully Built-Out as Standard Office
  • Mostly Open Floor Plan Layout
  • Central Air and Heating
  • Natural Light
  • City views.
  • Located in heart of Cambridge.

Property Overview

Office space for lease in Cambridge.

  • Courtyard
  • Reception
  • Yard
  • Air Conditioning

Property Facts

Building Type
Office
Year Built/Renovated
1999/2018
Building Height
5 Stories
Building Size
139,218 SF
Building Class
B
Typical Floor Size
27,843 SF
Unfinished Ceiling Height
13’
Parking
Surface Parking
1,100 Covered Parking Spaces

Select Tenants

  • Floor
  • Tenant Name
  • Industry
  • Multiple
  • Blueprint Medicines
  • Manufacturing
1 1
Exceptionally walkable
100/100
Fairly drivable
40/100
Exceptional public transit
90/100
Very bikeable
80/100
Source: Local Logic®
(617) 912-7000

Still interested?

Contact the brokers for more information about this property

Contacts

  • Listing ID: 41578706

  • Date on Market: 8/6/2026

  • Last Updated:

  • Address: 45 Sidney St, Cambridge, MA 02139

The Cambridgeport Office Property at 45 Sidney St, Cambridge, MA 02139 is currently available. Contact CBRE Inc. for more information.

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45 Sidney St

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