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

    Andy Yau, Portsmouth, NH

    License ID: 074320
    Years of Experience
    5
    Languages
    Cantonese, English, Mandarin

    Service Locations

    Contact details

    Phone:
    (603) 969-6216
    Office Address:
    The Common at 88 Middle Street, Portland, ME 04101

    Property Types

    • Commercial Lease
    • Land
    • Residential Multi Family

    Performance

    Listings
    16
    Total transactions
    151
    Total transactions amount
    $51M
    Price range
    $225k - 507k
    Average price
    $338k

    Listings

    For Sale (13)

    View map
    • $75,000
      0.13 Acres

      Residential Lot in Milton, NH

      Cleared single-family lot with town water and sewer access.
      White Mountain Hwy, Milton, NH 03851
      View Details
    • $399,900
      2,370 SF

      Gonic Triplex with River Views

      Triplex in Gonic with Cocheco River views.
      58 Pickering Rd, Rochester, NH 03867
      View Details
    • $899,000
      4,528 SF

      Waterfront Quadplex on Large Lot

      Spacious waterfront quadplex with subdivision potential in East Rochester.
      32 Mill St, Rochester, NH 03867
      View Details
    • New
      $475,000
      2,670 SF

      Updated Duplex Near Lake Winnisquam

      Updated 7-bedroom duplex near downtown Laconia and Lake Winnisquam.
      158 Court St, Laconia, NH 03246
      View Details
    • $399,900
      2,970 SF

      Mixed-Use Triplex in Downtown Milton

      Charming mixed-use triplex with commercial space and residential units.
      6 Dawson St, Milton, NH 03851
      View Details
    • $449,900
      1,635 SF

      Remodeled Mixed-Use Property in Rochester

      Remodeled mixed-use property with commercial space and residential unit.
      45 Hanson St, Rochester, NH 03867
      View Details
    • $495,000
      1.40 Acres

      Rochester, NH Mixed-Use Investment

      High-yield multifamily & commercial property.
      287 Milton Rd, Rochester, NH 03868
      View Details
    • $150,000
      748 SF

      Downtown Rochester Duplex - $150K

      Two-unit apartment building, fixer-upper potential.
      47 Hanson St, Rochester, NH 03867
      View Details
    • $500,000
      0.20 Acres

      Rochester Mixed-Use Investment

      Downtown Rochester, renovated duplex, high potential.
      45 Hanson St, Rochester, NH 03867
      View Details
    • $495,000
      3,015 SF

      Rochester, NH Mixed-Use Property

      High-potential, multi-tenant retail investment.
      289 Milton Rd, Rochester, NH 03868
      View Details
    • $150,000

      Downtown Rochester Land - Huge Potential

      Mixed-use land, rehab opportunity, downtown location.
      47AB Hanson St, Rochester, NH 03867
      View Details
    • $499,900
      0.20 Acres

      Downtown Rochester Mixed-Use Gem

      Renovated Duplex w/ Development Potential
      45AB Hanson St, Rochester, NH 03867
      View Details
    • $699,900

      South Berwick Quadplex For Sale

      Quadplex in downtown South Berwick with commercial space.
      10 Portland St, South Berwick, ME 03908
      View Details

    For Lease (3)

    View map
    • Contact for pricing
      43,560 SF

      Downtown Rochester Retail Space Available

      Prime retail space in the heart of downtown Rochester.
      65 Hanson St, Rochester, NH 03867
      View Details
    • Contact for pricing

      Prime Commercial Space in Maine

      Commercial space ideal for retail or restaurant use in Maine.
      275 Main St, South Berwick, ME 03908
      View Details
    • $1,195 /Mo
      697 SF

      Downtown Rochester Retail Space Available

      Retail space in downtown Rochester with additional parking.
      61 Hanson St, Rochester, NH 03867
      View Details

    Leases and Sales on Map

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    Andy Yau, Portsmouth, NH
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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.

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    Andy Yau, Portsmouth, NH
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