Sign Up Successful!
You now have access to more from Realmo!
Property Lookup
    Property Lookup
    • For Sale
    • For Lease
    • Recently Sold
    • Property Lookup
    • Brokers
    AI Search
    Back to Search
    The Largest CRE Database in the US with Over 1 Million Listings
    Property profile & analytics

    55 Congress St, Unit B Portsmouth, NH 03801-4069

    • Commercial real estate
    • 1,575 SF
    OFF-MARKET
    Value Estimations
    Cap Rate Potential
    Location Intelligence
    Property ID
    US58-0529007
    The Realmo ID is a unique identifier assigned to every property, incorporating country codes and precise geo-coordinates for 300x300-foot land blocks. It enables standardized data collection and seamless integration of disparate sources such as ownership, tax, title data and physical specifications. By aggregating current and historical records, the Realmo ID powers advanced analytics and delivers deep, verifiable insights for real estate professionals.

    Current Use by Public Records

    • Carey & Giampa Realtors / Real Estate Agency
    • HONEY TRIBE / (Bike/Boat/Book/etc) Store / Clothing & Fashion Store
    • APEX REGEN / Gym & Fitness Center / Alternative Medicine Practice
    • DA BOX by White Box Jewelers / (Bike/Boat/Book/etc) Store
    • Leysin American School / High School

    Property Details for 55 Congress St

    Year built
    1988
    Construction
    FRAME
    Property size
    1,575 SF
    Zone code
    CD5
    Property type
    Commercial real estate
    APN
    PRSM M:0117 B:0009 L:B
    APU
    PRSMM0117B0009LB

    Value Estimations

    based on Realmo’s proprietary methodology

    • AI approach

    • CAP approach

    • Comparable approach

    • Alternative Use

    Get a detailed, property-specific valuation — fast and free

    Location Insight

    • Map
    • Local Demand
    City
    Portsmouth
    County
    Rockingham
    State
    New Hampshire
    Longitude
    -70.7589
    Latitude
    43.0767
    CBSA code
    14460
    CBSA name
    BOSTON-CAMBRIDGE-QUINCY, MA-NH METROPOLITAN STATISTICAL AREA

    Property Tax & Assessments

    Tax date
    Tax Amount
    Assessed Land Value
    Assessed Improvement Value
    Total Assessed Value
    Applied Tax Rate
    Land Market Value
    Improvement Market Value
    Total Market Value
    2023
    $7,360
    $0.00
    $456,300
    $456,300
    -
    $0.00
    $0.00
    $0.00

    Comparable in this City

    • Value Estimation by Request
      6,200 SF

      150 Mirona Road Ext

      Commercial real estate • 6,200 SF
      150 Mirona Road Ext, Portsmouth, NH 03801
      View Details
    • Value Estimation by Request

      20 International Dr, Unit 30

      COMMERCIAL (GENERAL)
      20 International Dr, Portsmouth, NH 03801-6879
      View Details
    • Value Estimation by Request
      4.07 Acres

      11 Mirona Rd

      COMMERCIAL (GENERAL) • 4.07 Acres
      11 Mirona Rd, Portsmouth, NH 03801-5344
      View Details
    • Value Estimation by Request
      5.88 Acres

      Ww Park Dr

      COMMERCIAL (GENERAL) • 5.88 Acres
      Ww Park Dr, Newington, NH 03801
      View Details
    • Value Estimation by Request
      11.23 Acres

      225 Borthwick Ave

      COMMERCIAL (GENERAL) • 11.23 Acres
      225 Borthwick Ave, Portsmouth, NH 03801-4152
      View Details
    • Value Estimation by Request
      3.71 Acres

      1981 Woodbury Ave

      COMMERCIAL (GENERAL) • 3.71 Acres
      1981 Woodbury Ave, Portsmouth, NH 03801-3230
      View Details

    Similar Nearby for Sale

    • Contact for pricing
      6,200 SF

      Portsmouth Retail & Office Space

      Prime Portsmouth location, flexible lease options.
      150 Mirona Road Ext, Portsmouth, NH 03801
      View Details
    • Contact for pricing
      6,200 SF

      Portsmouth Retail & Office Space

      Prime Portsmouth location, flexible lease options.
      150 Mirona Road Ext, Portsmouth, NH 03801
      View Details
    • Contact for pricing

      Portsmouth Retail/Office Space

      Prime Portsmouth location, 4100+ sq ft available.
      72 Mirona Road Ext, Portsmouth, NH 03801
      View Details
    • $3,600,000
      16,470 SF

      Prime Newington Commercial Property

      Restaurant/Banquet Facility - High Traffic Location
      347 Shattuck Way, Newington, NH 03801
      View Details
    • $2,400,000
      5,575 SF

      Historic Portsmouth Commercial Gem

      Prime Location, Mixed-Use Investment
      48 Market St, Portsmouth, NH 03801
      View Details
    • $4,500,000
      10,434 SF

      Historic Portsmouth Brewery Building

      Prime Location, Versatile Spaces, Investment Opportunity
      56 Market St, Portsmouth, NH 03801
      View Details

    Similar Nearby for Lease

    • $14 SF/Yr
      1,290 SF

      Portsmouth Office Space Available

      Office space available for lease in Portsmouth, New Hampshire.
      1 Cate St, Portsmouth, NH 03801
      View Details
    • Contact for pricing

      Retail Space in Portsmouth, NH

      In-line retail space available in a busy shopping center.
      1465 Woodbury Ave, Portsmouth, NH 03801
      View Details
    • $22 SF/Yr

      Downtown Portsmouth Office Space Available

      Second-floor office space in downtown Portsmouth's Vaughan Mall.
      10 Vaughan Mall St, Portsmouth, NH 03801
      View Details
    • $18 SF/Yr

      Downtown Portsmouth Office Space Available

      Second-floor office space in downtown Portsmouth's Vaughan Mall.
      10 Vaughan Mall St, Portsmouth, NH 03801
      View Details
    • $22 SF/Yr

      Downtown Portsmouth Office Space Available

      Second-floor office space for rent in Vaughan Mall.
      10 Vaughan Mall St, Portsmouth, NH 03801
      View Details
    • $18 SF/Yr
      38,745 SF

      Vaughan Mall Office Suites

      Portsmouth, NH Office Space Available
      10 Vaughan Mall, Portsmouth, NH 03801
      View Details
    Request Owner's contact information
    Message sent successfully
    Error
    If you are the owner or broker of this property and would like to edit or remove this listing please send a message to web site administrator.
    55 Congress St, Unit B
    Portsmouth, NH 03801-4069
    Message sent successfully
    Error
    Email to Your Friends
    Link copied to clipboard
    Separate multiple addresses with a comma
    Message sent successfully
    Error

    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
    Thanks! Your message was sent.
    Error! Your message wasn't sent.
    Please enter your name
    Please enter email
    Please enter the email in the correct format
    Please enter phone
    Please enter the number in the correct format
    Please enter message
    Thank You

    You are Unsubscribed From Notifications

    Google sign-in failed. Please try again or use another login method.