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All Available Spaces(6)

Display Rental Rate as

  • Space
  • Size
  • Term
  • Rental Rate
  • Space Use
  • Build-Out
  • Available
  • 2nd Floor, Ste 202
  • 1,596 SF
  • Negotiable
  • $39.81 CAD/SF/YR $3.32 CAD/SF/MO $63,531 CAD/YR $5,294 CAD/MO
  • Office
  • -
  • Now

Four (4) offices, open area and reception area

  • Listed rate may not include certain utilities, building services and property expenses
  • Reception Area
  • 4 Private Offices
  • 2nd Floor, Ste 204/206
  • 2,635 SF
  • Negotiable
  • $47.08 CAD/SF/YR $3.92 CAD/SF/MO $124,043 CAD/YR $10,337 CAD/MO
  • Office
  • -
  • Now

THE THOMAS BLOCK •Suites vary from 1,376± SF - 4,250± SF offices •Historic brick and stone building •Water views or Commercial Street views •On-site property management •Parking spaces available for lease at the Old Port Square Parking Garage

  • Listed rate may not include certain utilities, building services and property expenses
  • 3rd Floor, Ste 305/307
  • 1,495 SF
  • Negotiable
  • $35.65 CAD/SF/YR $2.97 CAD/SF/MO $53,300 CAD/YR $4,442 CAD/MO
  • Office
  • -
  • Now

THE THOMAS BLOCK Suites vary from 371± SF - 2,050± SF offices Historic brick and stone building Water views or Commercial Street views On-site property management Parking spaces available for lease at the Fore Street Garage

  • Listed rate may not include certain utilities, building services and property expenses
  • 4th Floor, Ste 403, 405 & 407
  • 2,592 SF
  • Negotiable
  • $35.65 CAD/SF/YR $2.97 CAD/SF/MO $92,411 CAD/YR $7,701 CAD/MO
  • Office
  • -
  • Now

THE THOMAS BLOCK • Suites vary from 371± SF - 2,592± SF offices • Historic brick and stone building • Water views or Commercial Street views • On-site property management • Parking spaces available for lease at the Fore Street Garage

  • Listed rate may not include certain utilities, building services and property expenses
  • 4th Floor, Ste 409
  • 775 SF
  • Negotiable
  • $35.65 CAD/SF/YR $2.97 CAD/SF/MO $27,631 CAD/YR $2,303 CAD/MO
  • Office
  • -
  • Now

THE THOMAS BLOCK •Suites vary from 775± SF - 4,899± SF offices •Historic brick and stone building •Water views or Commercial Street views •On-site property management •Parking spaces available for lease at the Old Port Square Parking Garage

  • Listed rate may not include certain utilities, building services and property expenses
  • 4th Floor, Ste 411/415
  • 1,532 SF
  • Negotiable
  • $35.65 CAD/SF/YR $2.97 CAD/SF/MO $54,620 CAD/YR $4,552 CAD/MO
  • Office
  • -
  • Now

Open concept with reception area, server room, two restrooms

  • Listed rate may not include certain utilities, building services and property expenses
  • Private Restrooms
  • Reception Area
Space Size Term Rental Rate Space Use Build-Out Available
2nd Floor, Ste 202 1,596 SF Negotiable $39.81 CAD/SF/YR $3.32 CAD/SF/MO $63,531 CAD/YR $5,294 CAD/MO Office - Now
2nd Floor, Ste 204/206 2,635 SF Negotiable $47.08 CAD/SF/YR $3.92 CAD/SF/MO $124,043 CAD/YR $10,337 CAD/MO Office - Now
3rd Floor, Ste 305/307 1,495 SF Negotiable $35.65 CAD/SF/YR $2.97 CAD/SF/MO $53,300 CAD/YR $4,442 CAD/MO Office - Now
4th Floor, Ste 403, 405 & 407 2,592 SF Negotiable $35.65 CAD/SF/YR $2.97 CAD/SF/MO $92,411 CAD/YR $7,701 CAD/MO Office - Now
4th Floor, Ste 409 775 SF Negotiable $35.65 CAD/SF/YR $2.97 CAD/SF/MO $27,631 CAD/YR $2,303 CAD/MO Office - Now
4th Floor, Ste 411/415 1,532 SF Negotiable $35.65 CAD/SF/YR $2.97 CAD/SF/MO $54,620 CAD/YR $4,552 CAD/MO Office - Now

2nd Floor, Ste 202

Size
1,596 SF
Term
Negotiable
Rental Rate
$39.81 CAD/SF/YR $3.32 CAD/SF/MO $63,531 CAD/YR $5,294 CAD/MO
Space Use
Office
Build-Out
-
Available
Now

2nd Floor, Ste 204/206

Size
2,635 SF
Term
Negotiable
Rental Rate
$47.08 CAD/SF/YR $3.92 CAD/SF/MO $124,043 CAD/YR $10,337 CAD/MO
Space Use
Office
Build-Out
-
Available
Now

3rd Floor, Ste 305/307

Size
1,495 SF
Term
Negotiable
Rental Rate
$35.65 CAD/SF/YR $2.97 CAD/SF/MO $53,300 CAD/YR $4,442 CAD/MO
Space Use
Office
Build-Out
-
Available
Now

4th Floor, Ste 403, 405 & 407

Size
2,592 SF
Term
Negotiable
Rental Rate
$35.65 CAD/SF/YR $2.97 CAD/SF/MO $92,411 CAD/YR $7,701 CAD/MO
Space Use
Office
Build-Out
-
Available
Now

4th Floor, Ste 409

Size
775 SF
Term
Negotiable
Rental Rate
$35.65 CAD/SF/YR $2.97 CAD/SF/MO $27,631 CAD/YR $2,303 CAD/MO
Space Use
Office
Build-Out
-
Available
Now

4th Floor, Ste 411/415

Size
1,532 SF
Term
Negotiable
Rental Rate
$35.65 CAD/SF/YR $2.97 CAD/SF/MO $54,620 CAD/YR $4,552 CAD/MO
Space Use
Office
Build-Out
-
Available
Now

2nd Floor, Ste 202

Size 1,596 SF
Term Negotiable
Rental Rate $39.81 CAD/SF/YR
Space Use Office
Build-Out -
Available Now

Four (4) offices, open area and reception area

  • Listed rate may not include certain utilities, building services and property expenses
  • 4 Private Offices
  • Reception Area

2nd Floor, Ste 204/206

Size 2,635 SF
Term Negotiable
Rental Rate $47.08 CAD/SF/YR
Space Use Office
Build-Out -
Available Now

THE THOMAS BLOCK •Suites vary from 1,376± SF - 4,250± SF offices •Historic brick and stone building •Water views or Commercial Street views •On-site property management •Parking spaces available for lease at the Old Port Square Parking Garage

  • Listed rate may not include certain utilities, building services and property expenses

3rd Floor, Ste 305/307

Size 1,495 SF
Term Negotiable
Rental Rate $35.65 CAD/SF/YR
Space Use Office
Build-Out -
Available Now

THE THOMAS BLOCK Suites vary from 371± SF - 2,050± SF offices Historic brick and stone building Water views or Commercial Street views On-site property management Parking spaces available for lease at the Fore Street Garage

  • Listed rate may not include certain utilities, building services and property expenses

4th Floor, Ste 403, 405 & 407

Size 2,592 SF
Term Negotiable
Rental Rate $35.65 CAD/SF/YR
Space Use Office
Build-Out -
Available Now

THE THOMAS BLOCK • Suites vary from 371± SF - 2,592± SF offices • Historic brick and stone building • Water views or Commercial Street views • On-site property management • Parking spaces available for lease at the Fore Street Garage

  • Listed rate may not include certain utilities, building services and property expenses

4th Floor, Ste 409

Size 775 SF
Term Negotiable
Rental Rate $35.65 CAD/SF/YR
Space Use Office
Build-Out -
Available Now

THE THOMAS BLOCK •Suites vary from 775± SF - 4,899± SF offices •Historic brick and stone building •Water views or Commercial Street views •On-site property management •Parking spaces available for lease at the Old Port Square Parking Garage

  • Listed rate may not include certain utilities, building services and property expenses

4th Floor, Ste 411/415

Size 1,532 SF
Term Negotiable
Rental Rate $35.65 CAD/SF/YR
Space Use Office
Build-Out -
Available Now

Open concept with reception area, server room, two restrooms

  • Listed rate may not include certain utilities, building services and property expenses
  • Reception Area
  • Private Restrooms

Property Overview

THE THOMAS BLOCK •Suites vary from 775± SF - 4,899± SF offices •Historic brick and stone building •Water views or Commercial Street views •On-site property management •Parking spaces available for lease at the Old Port Square Parking Garage

  • Signage

Property Facts

Building Type
Office
Year Built
1900
Building Height
4 Stories
Building Size
61,657 SF
Building Class
B
Typical Floor Size
19,000 SF
Unfinished Ceiling Height
10’
Parking
Surface Parking
Covered Parking
Exceptionally walkable
90/100
Exceptionally drivable
100/100
Some public transit
40/100
Moderately bikeable
60/100
  • Listing ID: 29180115

  • Date on Market: 2026-07-10

  • Last Updated:

  • Address: 100 Commercial St, Portland, ME 04101

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