Photo of 511 Congress Street
Class A Office · Mixed Use

511 Congress Street

Portland, ME 04101

Available spaces

10 available · asking rates and prices · updated Sep 16, 2026

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Suite 200

$12.00–$16.00/SF/yr MG
Size 11,523 SFAvailable Now≈ Monthly $11,523–$15,364

- 1,775± SF - 34,569± SF of Class A Office Space available for lease - Centrally located in downtown Portland, the heart of Financial District - Easily accessible from I-295 exit 6 - On-site parking garage with direct building access - Newly renovated lobby with Class A finishes - Premiere 306 degree views of Portland and the surrounding towns - Amenities include first floor gym Tenant, building security, on-site property management.

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Suite 300

$12.00–$16.00/SF/yr MG
Size 11,523 SFAvailable Now≈ Monthly $11,523–$15,364

- 1,775± SF - 34,569± SF of Class A Office Space available for lease - Centrally located in downtown Portland, the heart of Financial District - Easily accessible from I-295 exit 6 - On-site parking garage with direct building access - Newly renovated lobby with Class A finishes - Premiere 306 degree views of Portland and the surrounding towns - Amenities include first floor gym Tenant, building security, on-site property management.

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Suite 503

$16.00/SF/yr MG
Size 3,300 SFAvailable Now≈ Monthly $4,400

- 1,775± SF - 34,569± SF of Class A Office Space available for lease - Centrally located in downtown Portland, the heart of Financial District - Easily accessible from I-295 exit 6 - On-site parking garage with direct building access - Newly renovated lobby with Class A finishes - Premiere 306 degree views of Portland and the surrounding towns - Amenities include first floor gym Tenant, building security, on-site property management.

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Suite 600

$16.00/SF/yr MG
Size 6,145 SFAvailable Now≈ Monthly $8,193

- 1,775± SF - 34,569± SF of Class A Office Space available for lease - Centrally located in downtown Portland, the heart of Financial District - Easily accessible from I-295 exit 6 - On-site parking garage with direct building access - Newly renovated lobby with Class A finishes - Premiere 306 degree views of Portland and the surrounding towns - Amenities include first floor gym Tenant, building security, on-site property management.

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Suite 700

$12.00–$16.00/SF/yr MG
Size 11,523 SFAvailable Now≈ Monthly $11,523–$15,364

- 1,775± SF - 34,569± SF of Class A Office Space available for lease - Centrally located in downtown Portland, the heart of Financial District - Easily accessible from I-295 exit 6 - On-site parking garage with direct building access - Newly renovated lobby with Class A finishes - Premiere 306 degree views of Portland and the surrounding towns - Amenities include first floor gym Tenant, building security, on-site property management.

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Suite 400

$12.00–$16.00/SF/yr MG
Size 11,523 SFAvailable Now≈ Monthly $11,523–$15,364

- 1,775± SF - 34,569± SF of Class A Office Space available for lease - Centrally located in downtown Portland, the heart of Financial District - Easily accessible from I-295 exit 6 - On-site parking garage with direct building access - Newly renovated lobby with Class A finishes - Premiere 306 degree views of Portland and the surrounding towns - Amenities include first floor gym Tenant, building security, on-site property management.

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Suite 500

$16.00/SF/yr MG
Size 4,646 SFAvailable Now≈ Monthly $6,195

- 1,600± SF - 34,569± SF of Class A Office Space available for lease - Centrally located in downtown Portland, the heart of Financial District - Easily accessible from I-295 exit 6 - On-site parking garage with direct building access - Newly renovated lobby with Class A finishes - Premiere 306 degree views of Portland and the surrounding towns - Amenities include first floor gym Tenant, building security, on-site property management.

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Suite 901

$23.50/SF/yr MG
Size 6,685 SFAvailable Now≈ Monthly $13,091

6,685± SF Top Floor Office Suite Centrally located in downtown Portland, in the heart of the Financial District Easily accessible from I-295 exit 6 On-site parking garage with direct building access Newly renovated lobby with Class A finishes Premiere 306 degree views of Portland and the surrounding towns Amenities include first floor gym Tenant, building security, on-site property management

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For sale

$1

Porta & Company is pleased to present the opportunity to acquire 511. Congress Street ("511 Congress" or "the Property"), a 128,400 square foot Class A office building with a 256 space on-site parking garage in the rear right in the heart of Downtown Portland. The property at 511 Congress enjoys a premier location opposite Monument Square in the center of the city. With the ability to immediately occupy full floors and the ability to take advantage of the opportunity zone program, this opportunity is ideal for both investors and owner occupants.

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Suite 900

$25.00/SF/yr MG
Size 4,847 SFAvailable Now≈ Monthly $10,098

4,838± SF Top Floor Office Suite Centrally located in downtown Portland, in the heart of the Financial District Easily accessible from I-295 exit 6 On-site parking garage with direct building access Newly renovated lobby with Class A finishes Premiere 306 degree views of Portland and the surrounding towns Amenities include first floor gym Tenant, building security, on-site property management

The building

Building
128,400 SF · 9 floors · 1974
Site
1.01 Acres · B-3 zoning
Systems
Sprinklered
Occupancy
Multi-tenant
Submarket
Portland-South Portland

Comps

Comparable sales and lease data is available to members only.
PG
Peter Gwilym · Porta & Company
Lists 10 of 10 spaces