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    Portland Mixed-Use Development Opportunity Title is generated by Realmo AI

    187 Congress Street, Portland, ME 04101

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    Claim this Listing
    New
    For Sale
    $450,000

    COMMERCIAL - Portland, ME

    Property size:
    1,519 SF
    Lot size:
    0.06 Acres
    Price / SF:
    $296/SF
    Added:
    May 29, 2026
    Days on Market:
    5
    Last Refresh:
    Jun 2 at 2:06 am

    Property Features for 187 Congress Street

    General Information

    Property type
    Commercial Sale
    Property subtype
    Other
    Zoning
    B-1
    Rooms
    Basement
    Parking features
    Off Street
    Basement
    Unfinished, Full
    Standard status
    Active
    Size
    1,519 SF
    Lot size
    0.06 Acres

    Taxes and HOA fees

    Tax Year
    2024
    Tax Annual Amount
    6472

    Utilities

    Sewer type
    Public Sewer
    Heating system
    Oil
    Water source
    Public

    Building Details

    Year built
    1850
    Building materials
    Wood Frame, Brick
    Roof type
    Shingle

    We can help!

    Listing Contact
    Heidi Young

    Listing agent Heidi Young

    Listing office Maine Real Estate Experts 47 Ossipee Trl E, Standish, ME

    Listing date May 29, 2026

    MLS# 1664225

    Copyright © 2026 Maine Listings. All rights reserved. All information provided by the listing agent/broker is deemed reliable but is not guaranteed and should be independently verified.

    HighLights

    • B1 Zoning: Offers diverse usage possibilities (check with town for specific uses).
    • Potential for Multi‑Story Development: City‑approved 50‑foot height ordinance allows for vertical construction.
    • Opportunity for Mixed‑Use Development: Potential to build condos and retail space.
    • Public Water and Sewer: Connected to public utilities.
    • Off‑Street Parking: Includes off‑street parking.
    • Wood Frame and Brick Construction: Combines wood frame with brick exterior.

    Overview

    This mixed-use property in Portland, Maine, presents a development opportunity with B-1 zoning, offering a range of possibilities. The city's approved 50-foot height ordinance allows for potential construction of condos on the upper floors and retail space on the ground floor. Interested parties should verify permitted uses with the local authorities. The existing structure, with a size of 1519 square feet, has been completely gutted. The lot size is 0.06 acres.

    Local Financial Insights For Apartment 5plus

    Simulate Cap Rate and NOI

    NOI Build-Up
    Vacancy
    income lost from leasable area expected to sit empty during the year — subtracted from gross rent.
    EGI (Effective Gross Income)
    gross rent minus vacancy losses — the realistic income before paying operating costs.
    OpEx (Operating Expenses)
    recurring costs to operate the property (property tax, insurance, utilities, maintenance, management) — excludes financing and capital improvements.
    NOI (Net Operating Income)
    income a property generates after operating costs but before financing and taxes.

    Component $ $/SF
    Gross rent $48.3k $31.80
    − Vacancy −$2.9k −$1.91
    EGI $45.4k $29.89
    − OpEx −$20.4k −$13.45
    NOI $25.0k $16.44
    1,519 SF · lease $31.80/SF/yr · vacancy 6.00% · expense 45.00%

    Alternative Uses

    Best Use
    Apartment 5plus
    $356.8K
    $312.2K – $416.2K (±1% cap)
    NOI $24,973 @ 7.0% cap · market cap 5.55%
    Second Best
    Mixed Use
    $269.5K
    $235.8K – $314.4K (±1% cap)
    NOI $18,866 @ 7.0% cap · market cap 4.19%
    Theoretical Best
    Office A
    $417.5K
    $365.3K – $487.1K (±1% cap)
    NOI $29,225 @ 7.0% cap · market cap 6.49%
    Zoning and permitted uses should be independently verified with local authorities.
    Property Profile Location Intelligence

    Current Use by Public Records

    Retail space

    Suggested Use

    Restaurant Real Estate Agency Dental Office Spa & Massage Center Hair Salon Nail Salon Food Market Daycare Center Grocery & Convenience Store Pharmacy

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

    Location Insight

    • Map
    • Local Demand
    City
    Portland
    County
    Cumberland
    State
    Maine
    Longitude
    -70.2501542
    Latitude
    43.6644597

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    FAQs

    What type of property is this?
    Mixed-use property - Mixed-use property with development potential in Portland, Maine.
    Where is this mixed-use property located?
    The property is located at 187 Congress Street Portland, ME.
    What is the asking price?
    The asking price for this property is $450,000.
    What are key features of this property?
    This property features: B1 Zoning: Offers diverse usage possibilities (check with town for specific uses).; Potential for Multi‑Story Development: City‑approved 50‑foot height ordinance allows for vertical construction.; Opportunity for Mixed‑Use Development: Potential to build condos and retail space.
    (207) 415-5466
    We can help!
    Listing Contact
    Heidi Young
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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
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