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12 Mountfort St 3,378 - 26,561 sq ft of 4-Star Office Space Available in Portland, ME 04101

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SUBLEASE HIGHLIGHTS

  • New Construction
  • Warm Vanilla Shell
  • Flexible Layouts
  • Covered Parking

ALL AVAILABLE SPACES(3)

Display Rent as

  • SPACE
  • SIZE
  • TERM
  • RATE
  • USE
  • CONDITION
  • AVAILABLE
  • 1st Floor, Ste 100
  • 3,378 sq ft
  • Negotiable
  • Upon Application Upon Application Upon Application Upon Application
  • Office
  • -
  • Now
  • Sublease space available from current tenant
  • Lease rate does not include utilities, property expenses or building services
  • 3rd Floor, Ste 300
  • 16,210 sq ft
  • Negotiable
  • Upon Application Upon Application Upon Application Upon Application
  • Office
  • -
  • Now

$26.00 - $30.00/SF NNN

  • Sublease space available from current tenant
  • Lease rate does not include utilities, property expenses or building services
  • 4th Floor, Ste 402
  • 6,973 sq ft
  • Negotiable
  • Upon Application Upon Application Upon Application Upon Application
  • Office
  • Partial Fit-Out
  • Now
  • Sublease space available from current tenant
  • Mostly Open Floor Plan Layout
  • Partially Fit-Out as Standard Office
  • Prestigious Space
Space Size Term Rate Space Use Condition Available
1st Floor, Ste 100 3,378 sq ft Negotiable Upon Application Upon Application Upon Application Upon Application Office - Now
3rd Floor, Ste 300 16,210 sq ft Negotiable Upon Application Upon Application Upon Application Upon Application Office - Now
4th Floor, Ste 402 6,973 sq ft Negotiable Upon Application Upon Application Upon Application Upon Application Office Partial Fit-Out Now

1st Floor, Ste 100

Size
3,378 sq ft
Term
Negotiable
Rate
Upon Application Upon Application Upon Application Upon Application
Space Use
Office
Condition
-
Available
Now

3rd Floor, Ste 300

Size
16,210 sq ft
Term
Negotiable
Rate
Upon Application Upon Application Upon Application Upon Application
Space Use
Office
Condition
-
Available
Now

4th Floor, Ste 402

Size
6,973 sq ft
Term
Negotiable
Rate
Upon Application Upon Application Upon Application Upon Application
Space Use
Office
Condition
Partial Fit-Out
Available
Now

1st Floor, Ste 100

Size 3,378 sq ft
Term Negotiable
Rate Upon Application
Space Use Office
Condition -
Available Now

  • Sublease space available from current tenant
  • Lease rate does not include utilities, property expenses or building services

3rd Floor, Ste 300

Size 16,210 sq ft
Term Negotiable
Rate Upon Application
Space Use Office
Condition -
Available Now

$26.00 - $30.00/SF NNN

  • Sublease space available from current tenant
  • Lease rate does not include utilities, property expenses or building services

4th Floor, Ste 402

Size 6,973 sq ft
Term Negotiable
Rate Upon Application
Space Use Office
Condition Partial Fit-Out
Available Now

  • Sublease space available from current tenant
  • Partially Fit-Out as Standard Office
  • Mostly Open Floor Plan Layout
  • Prestigious Space

PROPERTY OVERVIEW

12 Mountfort is a new, six-story, Class A trophy office tower, located off of Fore Street in Portland’s fastest-growing commercial neighborhood. Join Covetrus and Woodard & Curran in this state-of-the-art building, featuring incredible natural light and water views of the Fore River. Design features include 12’ exposed ceilings, floor-to-ceiling windows, 10,000 SF flexible floor plates, common decks, and all the well-appointed amenities today’s sophisticated workforce expects. The suites are being offered in warm vanilla shell condition.

PROPERTY FACTS

Property Type
Office
Year Built
2022
LoopNet Rating
4 Star
Number of Floors
6
Property Size
117,314 sq ft
Costar Property Class
A
Typical Floor Size
19,552 sq ft
Parking
Surface Parking
Covered Parking
Walk Score®
Excellent pedestrian access (95)
Bike Score®
Good for cycling (86)
What is a Walk Score®, Transit Score® & Bike Score®?
Walk Score® measures how walkable a location is.
Transit Score® measures access to public transport.
Bike Score® measures how accessible a location is by bike
What is a Walk Score®
, Transit Score® & Bike Score?
Walk Score® measures how walkable
a location is. Transit Score®
measures access to public transport. Bike Score®
measures how accessible a location is by bike®
  • Listing ID: 28002221

  • Date on Market: 12/05/2025

  • Last Updated:

  • Address: 12 Mountfort St, Portland, ME 04101

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