Photo of 100 Commercial Street
7
Class A Office · General

100 Commercial Street

Portland, ME 04101

Available spaces

6 for lease · asking rates · updated Oct 7, 2026

No photos yet

Suite 202

$28.75/SF/yr MG
Size 1,596 SFAvailable Now≈ Monthly $3,824

THE THOMAS BLOCK •Suites vary from 371± 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

No photos yet

Suite 411/415

$25.75/SF/yr MG
Size 1,532 SFAvailable Now≈ Monthly $3,287

THE THOMAS BLOCK •Suites vary from 371± 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

Suite 403, 405 & 407 at 100 Commercial St

Suite 403, 405 & 407

$25.75/SF/yr MG
Size 2,592 SFAvailable Now≈ Monthly $5,562

THE THOMAS BLOCK •Suites vary from 371± 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

No photos yet

Suite 204/206

$34.00/SF/yr MG
Size 2,635 SFAvailable Now≈ Monthly $7,466

THE THOMAS BLOCK •Suites vary from 371± 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

Suite 409 at 100 Commercial St

Suite 409

$25.75/SF/yr MG
Size 775 SFAvailable Now≈ Monthly $1,663

THE THOMAS BLOCK •Suites vary from 371± 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

Suite 211 at 100 Commercial St

Suite 211

$28.95/SF/yr MG
Size 371 SFAvailable Now≈ Monthly $895

THE THOMAS BLOCK •Suites vary from 371± 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

The building

Building
64,284 SF · 4 floors · 1860
Site
0.35 Acres · B-3/PAD zoning
Occupancy
Multi-tenant
Submarket
Portland-South Portland

Comps

Comparable sales and lease data is available to members only.
PA
Peter A. Harrington · Malone Commercial Brokers
Lists 6 of 6 spaces