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    The Largest CRE Database in the US with Over 1 Million Listings

    400 Congress St, Unit 300 Portland, ME 04101

    Sponsored
    Sponsored
    For Lease
    Contact for pricing

    Workspaces, services and support to help you work better in Frisco Square

    Description

    Added:
    Feb 19, 2026
    Days on Market:
    7
    Thrive in Portland’s bustling business district.
    Create a formidable presence for your business with flexible office space in Portland, the largest city in Maine. Excel with workspace in the heart of Portland’s business district, a prime location for any aspiring entrepreneur. Commute easily to your workspace using the I-95, I-295, and US Route 1, which are all within easy reach. If you prefer getting to work using public transport, Congress St + Elm St Bus Stop is on your doorstep. Network around the world by driving just 10 minutes to Portland International Airport. Whether you’re after a place to focus for the day or want a more permanent base for your business, we have what you need.
    Spark innovative ideas and find new opportunities to connect in Portland. Bring your ideas to life in designer workspaces and creative meeting rooms, knowing you can rely on superfast WiFi. Our friendly team is always on hand and happy to help should you need anything throughout the workday. Choose to drive to work without worrying about parking – there are plenty of public parking lots and garages nearby. Unwind after work with a stroll around one of the beautiful parks that are within walking distance or keep the conversation going with clients in a local restaurant.

    Property Features for 400 Congress St

    General Information

    Property type
    Office Properties & Spaces
    Lease Type
    Gross Lease

    Amenities

    24 Hour Access
    Air Conditioning
    Breakroom
    Business Center
    Close to Public Transportation
    Conference Rooms
    Controlled Access
    Elevator
    Fiber Optic Internet
    Furnished Units Available
    Internet
    Lounge
    Meeting Event Space
    On-Site Security Staff
    Online Services
    Package Service
    Reception
    Recycling
    Storage Space
    Wheelchair Accessible
    Wi-Fi

    Spaces For Lease

    at 400 Congress St,Unit 300, Portland, ME 04101 Contact us
    Office for 1 pers
    Size
    86-538 SF
    Focus on driving your business forward with a professional office just for you and...
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    Contact us
    Office for 2 ppl
    Size
    108-538 SF
    Get started right away with a ready-to-use office space for two. Regus’ small offices...
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    Contact us
    Office for 3 ppl
    Size
    162-646 SF
    Productive workspace for three that comes with everything taken care of. Regus’...
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    Contact us
    Office for 4 ppl
    Size
    215-646 SF
    Book a fully serviced office for four, and Regus will make sure everything always...
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    Contact us
    Office for 5 ppl
    Size
    323-807 SF
    Access a bright and inspiring office space designed to help teams of five to do their...
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    Contact us
    Coworking membership
    Size
    54-108 SF
    Work wherever and however you need to with a Regus Coworking membership. Regus offers...
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    Contact us
    Office membership
    Size
    86-108 SF
    Work wherever and however you need to with a Regus Office membership. Regus offers...
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    Contact us
    Coworking
    Size
    108-328 SF
    Get to work among a like-minded community in Regus’ shared office space. Regus’...
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    Contact us
    Office for 10 ppl
    Size
    484-1184 SF
    Find a flexible choice for business with an open-plan office space that supports...
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    Contact us
    Office for 15 ppl
    Size
    1076-1292 SF
    Open plan office space for 15 persons available on flexible terms, so you can add...
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    Contact us
    Virtual office
    Size
    10-50 SF
    Build your business presence fast, with an instant professional company address and...
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    Contact us
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    We can help!

    Listing Contact
    Regus USA
    Regus USA

    Learn more

    HighLights

    • Be part of a vibrant coworking community with dedicated desk or hot desking options in thousands of idyllic locations across the globe
    • Grow in a modern workplace with the added advantage of a benefits program offering exclusive discounts and bespoke procurement support
    • Access Regus' network of workspaces and business lounges as often as you need and take advantage of their exclusive benefits
    • Impress clients, hold memorable workshops, and deliver a winning pitch in Regus' meeting spaces, fully equipped for gatherings of any size
    • Collaborate with like‑minded professionals and enjoy regular networking and community events with a Regus membership
    • Claim a virtual address in any of the prestigious locations around the world with mail handling services and a virtual assistant to answer calls
    Location Intelligence

    Current Use by Public Records

    Social Security Administration Social Security Office United States Postal ... Post Office Travel Visa Pro Travel Agency Maine Executive Search Corporate Office Help ME Handyman ... Hardware & Home Improvement

    Suggested Use

    Real Estate Agency Dental Office Restaurant Spa & Massage Center Hair Salon Nail Salon Building Supply Law Firm Daycare Center Auto Repair Shop

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

    Location Insight

    • Map
    • Local Demand
    City
    Portland
    State
    Maine
    Longitude
    -70.25714458
    Latitude
    43.65866145

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      View Details

    FAQs

    What type of property is this?
    Office Property / Space - Workspaces, services and support to help you work better in Frisco Square
    Where is this office property / space located?
    The property is located at 400 Congress St, Unit 300 Portland, ME.
    What are key features of this property?
    This property features: 24 Hour Access Air Conditioning Breakroom Business Center Close to Public Transportation Conference Rooms Controlled Access Elevator Fiber Optic Internet Furnished Units Available Internet Lounge Meeting Event Space On-Site Security Staff Online Services Package Service Reception Recycling Storage Space Wheelchair Accessible Wi-Fi
    (972) 764-8885
    Request Owner's contact information
    400 Congress St, Unit 300 Portland, ME 04101
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    400 Congress St, Unit 300
    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
    400 Congress St, Unit 300 Portland, ME 04101
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    Listing Contact
    Regus USA
    Regus USA
    (972) 764-8885
    Learn more
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