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    646 Main Street Port Jefferson, NY 11777

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    Claim this Listing
    For Lease
    $1,250 /Mo

    COMMERCIAL - Port Jefferson Village, NY

    Type:Office
    Property size:
    570 SF
    Lot size:
    0.66 Acres
    Added:
    Nov 15, 2025
    Days on Market:
    154
    Last Refresh:
    Apr 18 at 9:06 am

    Property Features for 646 Main Street

    General Information

    Property type
    Commercial Lease
    Property subtype
    Office
    Parking features
    Parking Lot
    Standard status
    Active
    APN
    0206-016-00-08-00-031-002
    Size
    570 SF
    Lot size
    0.66 Acres

    Taxes and HOA fees

    Tax Year
    2025
    Tax Annual Amount
    1584

    Utilities

    Sewer type
    Public Sewer
    Heating system
    Forced Air
    Cooling system
    Central Air
    Water source
    Public

    Building Details

    Building materials
    Frame

    We can help!

    Listing Contact
    Amy Schuler

    Listing agent Amy Schuler

    Listing office Your Team D&G Realty Ltd 511B Mastic Rd, Mastic Beach, NY

    Listing date Nov 15, 2025

    MLS# 936074

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

    Overview

    Turnkey Office Space in Village

    This turnkey office space is located in the heart of Port Jefferson Village. The space features approximately 250 square feet of office area and approximately 320 square feet of waiting room space, along with a shared bathroom. It is suitable for a wellness clinician, therapist, acupuncturist, health coach, or similar professional. The sublease includes wifi, heat, central air conditioning, and central vacuum. The space is fully furnished with new furnishings and is located in a well-kept building on the main floor. Ample free parking is available, and the building is handicapped accessible. The subtenant must have professional liability insurance and add the landlord (leaseholder) and owner as additional insured. The space is professional, quiet, and ready for use. The property is located on a lot with a size of 0.66 acres.
    Property Profile Insight Report Location Intelligence

    Current Use by Public Records

    Pcc Recovery Consultant Harmony and Light Wellness Gym & Fitness Center Paul Cataldo Architecture ... Architect Gidwani Jay MD Physician Island Couples Counseling Medical Clinic

    Suggested Use

    Real Estate Agency Law Firm Restaurant Spa & Massage Center Dental Office Hair Salon Nail Salon Building Supply Gym & Fitness Center Daycare Center

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

    Location Insight

    • Map
    • Local Demand
    City
    Port Jefferson
    County
    Suffolk
    State
    New York
    Longitude
    -73.062971
    Latitude
    40.94017

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    FAQs

    What type of property is this?
    Office units - Furnished office space ideal for wellness clinician in Port Jefferson.
    Where is this office units located?
    The property is located at 646 Main Street Port Jefferson, NY.
    What is the lease rate?
    The lease rate is $1,250 /Mo.
    What are key features of this property?
    This property features: Turnkey, fully furnished office space (approx. 250 sf) with waiting room (approx. 320 sf).; Prime location in the heart of Port Jefferson Village.; Includes essential utilities: WiFi, heat, and central air conditioning.
    (516) 250-5565
    We can help!
    Listing Contact
    Amy Schuler
    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.

    More about this property
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