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    Industrial Condo with Office Title is generated by Realmo AI

    280 Heritage Ave Unit J, Portsmouth, NH 03801

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    For Sale
    $975,000

    Modern industrial condo offers NNN occupancy with air-conditioned office and a drive-in door for loading efficiency.

    Type:Industrial
    Property size:
    5,100 SF
    Price / SF:
    $191/SF
    Added:
    Jun 3, 2026
    Days on Market:
    2
    Last Refresh:
    Jun 3 at 11:10 am

    Property Features for 280 Heritage Ave Unit J

    General Information

    Standard status
    Active
    Size
    5,100 SF
    Property subtype
    Industrial

    Building Details

    Year Built
    2005

    We can help!

    Listing Contact
    Christopher Healey
    Christopher Healey

    Listing agent Christopher Healey License #NH #067652

    Listing office The Boulos Company

    Listing date Jun 3, 2026

    Source Boulos

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

    All listing content including descriptions, pricing, images are the copyrighted material of The Boulos Company

    HighLights

    • 5,100± SF industrial condo built in 2005, fully occupied under an NNN lease with a longstanding tenant
    • Includes 900± SF air‑conditioned office with a break area and 1 restroom
    • Warehouse area offers 4,200± SF with 24’ clear height and 1 drive‑in door for loading
    • Warehouse has 1 restroom, plus a bonus mezzanine
    • Six (6) dedicated parking spaces and additional common parking available
    • Serviced by municipal water/sewer with natural gas and electric; Commercial‑Industrial zoning

    Overview

    This offering is a modern 5,100± SF industrial condo configured with 900± SF of air-conditioned office space and 4,200± SF of warehouse area plus a bonus mezzanine. The office includes a small break area and one restroom, while the warehouse includes one restroom. The warehouse provides 24’ clear height and features one 14’ drive-in door designed for straightforward receiving and distribution operations. The unit also has six dedicated parking spaces, with additional common parking available, and is supported by municipal water/sewer services, natural gas, and electric.

    The property is located at 280 Heritage Avenue, Unit J in Portsmouth, NH. It is described as being zoned commercial-industrial, with convenient access to Pease International Tradeport. The remarks also note the unit is approximately 2.5 miles from downtown Portsmouth.

    For buyers seeking an industrial condo with an office component, this layout supports a combined workplace and warehouse use, including the presence of both office and warehouse restrooms. The warehouse configuration, clear height, and single drive-in door offer practical functionality for distribution and light warehouse logistics, while the NNN lease structure is referenced for an income-oriented ownership approach.

    Local Financial Insights For Office B

    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 $107.1k $21.00
    − Vacancy −$14.2k −$2.79
    EGI $92.9k $18.21
    − OpEx −$23.2k −$4.55
    NOI $69.6k $13.66
    5,100 SF · lease $21.00/SF/yr · vacancy 13.30% · expense 25.00%

    Alternative Uses

    Best Use
    Office B
    $994.9K
    $870.5K – $1.16M (±1% cap)
    NOI $69,642 @ 7.0% cap · market cap 7.14%
    Second Best
    Flex RnD
    $991.2K
    $867.3K – $1.16M (±1% cap)
    NOI $69,384 @ 7.0% cap · market cap 7.12%
    Theoretical Best
    Office A
    $1.36M
    $1.19M – $1.59M (±1% cap)
    NOI $95,509 @ 7.0% cap · market cap 9.80%
    Zoning and permitted uses should be independently verified with local authorities.
    Location Intelligence

    Current Use by Public Records

    ISHIGAKI USA Ltd Industrial Manufacturer Rt Stearns Inc Production Facility P.A.T. Products Industrial Manufacturer Black Dog Divers General Contractor boatstore.com Big Box & Wholesale Store

    Suggested Use

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

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

    Similar Places Nearby

    • Ikko Hibachi & Sushi Catering — 2466 Lafayette Rd, Portsmouth, NH 03801

    Location Insight

    • Map
    • Local Demand
    City
    Portsmouth
    County
    Strafford
    State
    New Hampshire
    Longitude
    -70.79796
    Latitude
    43.03503

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    FAQs

    What type of property is this?
    Flex space - Modern industrial condo offers NNN occupancy with air-conditioned office and a drive-in door for loading efficiency.
    Where is this flex space located?
    The property is located at 280 Heritage Ave Unit J Portsmouth, NH.
    What is the asking price?
    The asking price for this property is $975,000.
    What are key features of this property?
    This property features: 5,100± SF industrial condo built in 2005, fully occupied under an NNN lease with a longstanding tenant; Includes 900± SF air‑conditioned office with a break area and 1 restroom; Warehouse area offers 4,200± SF with 24’ clear height and 1 drive‑in door for loading
    (603) 475-1235
    We can help!
    Listing Contact
    Christopher Healey
    Christopher Healey
    Real Estate License ID: NH #067652
    Learn More
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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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