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Property profile & analytics
FOR LEASE
Office buildings

45 Exchange St Portland, ME 04101

25,071 SF 0.14 ac lot Built 1900
Entity Owned 3-yr Hold Free & Clear
Property ID
US42-0105303
45 Exchange St, Portland, ME 04101 For Lease
$19.92 SF/Yr
45 Exchange St, Portland, ME 04101
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Property summary
AI-generated overview

This exceptional 25,071 square foot office building, located at 45 Exchange Street in Portland, Maine, presents a unique investment opportunity. Built in 1867, this four-story building boasts a rich history within the vibrant Old Port district. The property sits on a 0.14-acre lot and is zoned B3 - Downtown Business & PAD - Pedestrian Activities District Overlay (Parcel ID 032 E005001, Cumberland County). The building features individually metered, 100-amp power, and convenient elevator access. Ideal for multiple tenants, this traditional office space also offers executive office suites, making it versatile for a variety of business needs. The building's prime location in the heart of Portland's bustling downtown offers unparalleled access to amenities, transportation, and a thriving business community. Its historic charm combined with modern conveniences makes 45 Exchange Street an attractive option for businesses seeking a prestigious and functional workspace. The property's classic architecture and central location provide a unique blend of historical character and modern functionality. This is a rare opportunity to acquire a well-established property in a highly sought-after area of Portland, Maine. The building's multiple tenancy allows for diverse income streams and potential for future growth. Interested parties are encouraged to explore this exceptional property further.

Property profile
Verified
Property type Office buildings
Use group OFFICE BUILDING
Year built 1900
Total area 25,071 SF
Lot 0.14 ac (6,229 SF)
APN PTLD M:032 B:E005001
UPID US42-0105303
Cap rate & NOI
Priority signal for investors
Implied cap rate, NOI & suggested price
Cap rate vs submarket · NOI estimate · 3 price anchors
Implied cap rate, NOI & suggested price
Cap vs submarket · NOI estimate · 3 price anchors
Current use
Occupant on record · Public records
  • Integral Consulting Inc. Environmental Consultant
  • Swissguard USA Security Service
  • Maine Mountain Collaborative Association Or Organization
Value estimations
Realmo proprietary · 4 methods
AI Approach AI
$4.84M
CAP Approach CAP
$5.89M
Comparable Approach Comparable
$3.65M
Blend (final) Blend
$4.36M
Owner & transaction history
Cow Bella LLC · 3 yrs held
Cow Bella LLC
since 2022
Last sale
$4.2M
5 recorded transactions
2025
Price N/A
2022
$4.2M
2022
Price N/A
2009
Price N/A
2007
Price N/A
Zoning & alternative use
Permitted uses
Permitted uses
Allowed · conditional · prohibited
Top alternative use upside
Commercial (general) $6.9M +50.8%
Retail stores $5.1M +10.6%
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“Is 15.6% cap rate sustainable?” · “Best tenant mix for BU1?” · “What’s the redev upside?”
More about this property
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