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1 Monument Sq
Portland, ME 04101 City Center

$23,230 USD/MO

Office For Lease  •  12,671 SF

Property Details

  • Property Type Office
  • Year Built 1972
  • Total Building Size 142,859 SF
  • Tenancy Multiple
  • Building Class B
  • Zoning B-3
60 Transit Score
100 Walk Score

1 Space Available

Name Space Use Size Rent Details
4th Floor Ste Office 12,671 SF $22.00 USD/SF/YR 
The 4th floor available space is currently leased to Dechra, who fully renovated the floor in 2014. The space features open work areas, private offices, abundant natural light, a breakroom/kitchen area, conference rooms, dedicated men’s and women’s restrooms and direct elevator access.

  • Date available: Aug 2026
  • Lease term: Negotiable
  • Service type: Modified Gross
  • Space Type: Sublet

Description 

We are pleased to offer for sublease a 12,671± SF, full floor, Class-A office suite at one of Portland’s most prestigious buildings, One Monument Square. This building is located in the heart of the Portland’s Downtown Financial and Business District, adjacent to Monument Square. The abundant amenities of Portland’s Old Port, Arts District and working waterfront are all within walking distance.

The 4th floor available space is currently leased to Dechra, who fully renovated the floor in 2014. The space features open work areas, private offices, abundant natural light, a breakroom/kitchen area, conference rooms, dedicated men’s and women’s restrooms and direct elevator access.

Highlights

Class A Office Space
Excellent Downtown Location
360° Natural Light
24/7 Building Access & Security
First Floor Cafe & Smoothie Shop
New Gym

Amenities

  • 24 Hour Access
  • Controlled Access
  • Food Court
  • Property Manager on Site
  • Signage

Major Tenants

Tenant SF Occupied Lease End Date
Bank of America Private Bank
CERA Sandwiches
Dechra Vetinary Products 3/19/2026
Hightower Advisors
KeyBank
Littler Mendelson P.C.
Merrill Lynch Wealth Management
Penobscot Financial Advisors
The Hartford

Public Transportation

Commuter RailDriveWalkDistance
4 min - 2.0 mi
AirportDriveWalkDistance
Portland International Jetport 10 min - 4.1 mi
Justin Lamontagne 207-272-3013 The Dunham Group
Justin Lamontagne 207-272-3013 The Dunham Group