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    100 Commercial St Portland, ME 04101

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    For Lease
    Contact for pricing

    Historic Portland office space, multiple tenants. Prime downtown location.

    Lot size:
    61,657 SF

    Property Features for 100 Commercial St

    General Information

    Property type
    Office properties & Spaces
    Lease Type
    Gross Lease
    RSF (Rentable sq. ft)
    61,657 SF
    Total Rate
    132305.65

    Building Details

    Year Built
    1900
    Buildings
    1
    Stories
    4

    Spaces For Lease

    at 100 Commercial St, Portland, ME 04101 Contact us
    Unit Suite 202

    $28 /Mo

    Size
    1,596 SF
    Contact us
    Unit Suite 209

    $26 /Mo

    Size
    392 SF
    Contact us
    Unit Suites 409/411/415

    $25 /Mo

    Size
    2,307 SF
    Contact us

    We can help!

    Listing Contact
    Peter Harrington
    Peter Harrington

    Listing Agency: Malone Commercial Brokers Listing Agent: Peter Harrington

    Displayed information is deemed reliable but is not guaranteed and should be independently verified.

    Learn more

    Property Insight Report

    Overview

    This exceptional commercial property, located at 100 Commercial Street in Portland, Maine, offers 61,657 square feet of prime office space. The building, constructed in 1900, is a four-story structure situated on a 0.349-acre lot. Its classic architecture blends seamlessly with the vibrant downtown environment. The property is zoned B3 Downtown Business District & PAD Pedestrian Activity Overlay, providing flexibility for a variety of commercial uses. The building features one passenger elevator, serving all four floors, and boasts 100 amp electrical service. The property is designated as a Traditional Office building and also offers Executive Office suites, making it suitable for a range of business needs. Multiple tenancies are currently in place. The property's address is 100 Commercial Street, Portland, ME 04101, and its location within Cumberland County offers excellent access to transportation and amenities. The Assessor's Parcel Number (APN) is Map 30, Block C, Lots 1-8. This is a rare opportunity to acquire a substantial and well-located office building in the heart of Portland.
    Property Profile Insight Report Location Intelligence

    Current Use by Public Records

    Mark Mueller Architects Architect Maine Boatbuilders Show Corporate Office Misi Co IT Consulting Firm Society Mortgage Maine ... Loan Service Martin Defense Group, ... Engineering Consultant

    Suggested Use

    Real Estate Agency Dental Office Spa & Massage Center Restaurant Hair Salon Nail Salon Building Supply Daycare Center Auto Repair Shop Skin Care Clinic

    Zoning and permitted uses should be independently verified with local authorities.

    Location Insight

    • Map
    • Local Demand
    City
    Portland
    County
    Cumberland
    State
    Maine
    Longitude
    -70.251445874841
    Latitude
    43.656433373146

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    FAQs

    What type of property is this?
    Office property - Historic Portland office space, multiple tenants. Prime downtown location.
    Where is this office property located?
    The property is located at 100 Commercial St Portland, ME.
    What is the lease rate?
    The lease rate is $25-$28 SF/Yr.
    What are key features of this property?
    This property features: 61,657 SF of prime office space in a four-story building at 100 Commercial Street, Portland, ME.; Historic brick and stone building on a 0.349-acre lot, offering 2,307 SF, 1,596 SF, and 392 SF office suites.; Water or Commercial Street views.
    (207) 772-2422 Call to check price and availability
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    100 Commercial St Portland, ME 04101
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    Portland, ME 04101
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    Realmo Value Estimations

    Realmo estimates a property’s market value using a proprietary methodology that incorporates public data and user-submitted information. This cumulative value is generated by integrating a variety of conventional and innovative methods. 

    Disclaimer

    These figures are not official appraisals and should not be used as a substitute for a valuation performed by a licensed appraiser.
    Actual market value may differ due to factors not captured in the data. Estimates are offered for informational purposes only, and users should conduct independent research before making financial or investment decisions.
    By using this feature, you acknowledge that Realmo is not responsible for actions taken based on these estimates.

    AI approach

    Realmo AI Method estimates property value using machine learning models trained on millions of comparable listings, transactions, and market signals. It analyzes property features, location intelligence data, and current market dynamics to predict the most probable market value in real time.

    Realmo CapRate Calculation

    Realmo calculates the Capitalization Rate (Cap Rate) to help estimate a property's potential return on investment. The Cap Rate is a fundamental metric in commercial real estate that measures the relationship between a property's net operating income and its market value.

    How We Calculate Cap Rate

    Cap Rate Formula:
    Cap Rate (%) = (Net Operating Income / Property Value) × 100

    Net Operating Income (NOI) Formula:
    NOI = Area × Lease Rate × (1 - Vacancy Rate) × (1 - Operating Expense Ratio)

    Components

    Net Operating Income (NOI) represents the annual income a property generates after operating expenses:

    • Area: Building square footage from property records
    • Lease Rate: Annual $/sqft based on market data for the property type and geographic location
    • Vacancy Rate: Percentage of unoccupied space based on market data for the property type and location
    • Operating Expense Ratio: Operating costs as a percentage of income, varies by property type

    Property Value is derived from:

    • Recent sale price (if available)
    • Statistical models using comparable sales
    • AI-powered valuation estimates

    Example Calculation

    For a 100,000 sqft Office Building:

    • Lease Rate: $25.00/sqft/year (market data for Office in this area)
    • Vacancy Rate: 8% (market data for Office in this area)
    • Operating Expense Ratio: 35% (typical for Office properties)
    • Property Value: $15,000,000

    Step 1: Calculate NOI

    NOI = 100,000 × $25.00 × (1 - 0.08) × (1 - 0.35)
    NOI = 100,000 × $25.00 × 0.92 × 0.65
    NOI = $1,495,000/year

    Step 2: Calculate Cap Rate

    Cap Rate = ($1,495,000 / $15,000,000) × 100
    Cap Rate = 9.97%

    Property Type Considerations

    Net Operating Income calculations vary by property type due to different operating expense ratios:

    • Office: Higher expenses (30-40%) for HVAC, utilities, maintenance
    • Retail: Moderate expenses (25-35%) for common area maintenance
    • Industrial/Warehouse: Lower expenses (15-25%) for minimal tenant services
    • Multifamily: Moderate expenses (35-45%) including property management
    • Self-Storage: Lower expenses (25-35%) due to minimal maintenance

    Market lease rates and vacancy rates are specific to each property type and geographic location, reflecting local market conditions.

    Disclaimer

    These calculations are estimates for informational purposes only and should not be used as a substitute for professional financial analysis or appraisal.

    • Cap Rate calculations depend on market data that may change over time
    • Actual operating expenses, lease rates, and vacancy rates may differ from market averages
    • Individual property conditions, lease terms, and tenant quality significantly impact actual NOI
    • Property value estimates are approximations and not official appraisals
    • Cap rates vary widely by market, property condition, and investment risk profile

    Professional Guidance Recommended: Before making any investment or financial decisions, consult with licensed appraisers, commercial real estate brokers, and financial advisors who can evaluate your specific property and circumstances.
    By using this feature, you acknowledge that Realmo is not responsible for investment decisions or actions taken based on these estimates.

    Cap approach

    Capitalization Method calculates value based on estimated net operating income (NOI) and applying a market-based capitalization rate (cap rate), we estimate what a typical investor might be willing to pay for it.

    Comparable approach

    Comparable estimate is based on recent sales of similar nearby properties, adjusted for factors like size, condition, and location.

    Relative

    Relative property class coefficient uses factors that account for typical price differences between various asset types (e.g., retail vs. industrial) to provide a more accurate market-aligned estimate.

    Geo

    Comparable Sales Method, enhanced by Geo coefficients — location-based adjustment factors that reflect differences in price levels across neighborhoods, cities, or regions ensuring a more accurate, market-sensitive valuation.

    Stat Estimate

    This method estimates value based on actual market adjusted recent (~5 years) sales of comparable properties around by location and property type.

    • Ranges - area data calculated by industry standard IQR Outlier Removal Method
    • Range-from: 75% of all similar sales ($/sqft) are above this value
    • Range-to: 75% of all similar sales ($/sqft) are below this value
    AI Estimate

    This method estimates value based on AI market estimation of comparable properties around by location and property type.

    • Ranges - area data calculated by industry standard IQR Outlier Removal Method
    • Range-from: 75% of all estimations ($/sqft) are above this value
    • Range-to: 75% of all estimations ($/sqft) are below this value
    Alternative use

    Estimate considers the property’s potential value if used for a different purpose-based on zoning, demand, and market feasibility.

    More about this property
    100 Commercial St Portland, ME 04101
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    Contact for Pricing
    Please call us for current price
    and status of this listing Peter Harrington
    Peter Harrington
    Real Estate License ID: BA900499
    (207) 772-2422 (207) 318-8888
    Learn more
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