Sign Up Successful!
You now have access to more from Realmo!
    For Sale
    • 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

    Sunnyhill Ave/Mary Duffy Dr Williamstown, NJ 08094

    Sponsored
    For Sale
    $799,890

    LAND - WILLIAMSTOWN, NJ

    Lot size:
    7.10 Acres
    Days on Market:
    10
    Last Refresh:
    Feb 5 at 5:06 pm

    Property Features for Sunnyhill Ave/Mary Duffy Dr

    General Information

    Property type
    Land
    Property subtype
    Other
    Standard status
    Active
    Lot size
    7.10 Acres

    We can help!

    Listing Contact
    Thomas P. Duffy

    Keller Williams Realty - Washington Township (856) 582-1200

    Listing agent Thomas P. Duffy (856) 582-1200 License #8932672

    Listing date Jan 27, 2026

    MLS# NJGL2065000 Listing URL

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

    Learn more

    Property Insight Report

    Overview

    Approved Residential Subdivision Opportunity

    This is a rare residential development opportunity featuring a fully approved 10-lot residential subdivision located in the desirable Monroe Township, New Jersey. Approvals are already in place, allowing focus on engineering, site work, and vertical construction planning. The 7.1-acre property features 10 buildable lots with final subdivision approvals in hand. A Phase 1 environmental assessment was completed on 06/24/2025. The location provides convenient access to major roadways, schools, and amenities. This entitled project is suited for builders, small-to-mid developers, and investor groups seeking to accelerate their pipeline. Approvals and plans are available for review.
    Property Profile Insight Report Location Intelligence

    Current Use by Public Records

    Residential land & home ...

    Map

    City
    Williamstown
    County
    Middlesex
    State
    New Jersey
    Longitude
    -74.96585734
    Latitude
    39.62914317

    Nearby Similar for Sale

    • $899,900
      2,875 SF

      Multi-Family Property on 10 Acres

      Four-unit residential property on 10.2 acres with redevelopment potential.
      871 Corkery Ln, Williamstown, NJ 08094
      View Details
    • $850,000
      5,000 SF

      Restaurant/Bar Opportunity on Black Horse Pike

      Fully equipped restaurant/bar on 3.62 acres with expansion potential.
      40 E Black Horse Pike, Williamstown, NJ 08094
      View Details
    • $1,025,000

      Operating Nursery on 7 Acres

      Established nursery with high visibility, development potential.
      S Black Horse Park, Williamstown, NJ
      View Details
    • $4,450,000
      115 SF

      Winery and Vineyard For Sale

      Winery with tasting room, storage, and outdoor areas on 115+/- acres.
      870 W Malaga Rd, Williamstown, NJ 08094
      View Details
    • $1,500,000
      17,710 SF

      Prime Williamstown Commercial Space

      17,710 sqft, 4.7 acres, high visibility
      1351 Black Horse Park, Williamstown, NJ 08094
      View Details
    • $699,000
      3,276 SF

      Williamstown Commercial Property Investment

      Versatile Commercial Building w/ Apartment
      800 Black Horse Park, Williamstown, NJ 08094
      View Details
    • $699,890
      2.07 Acres

      Williamstown Commercial Land Opportunity

      2+ Acres, High-Traffic Location, Commercial Zoning
      1600 Black Horse Park, Williamstown, NJ 08094
      View Details
    • $699,000
      1,900 SF

      Williamstown Commercial Land Opportunity

      3.95 Acres, High Visibility, Investment Potential
      1851 Black Horse Park, Williamstown, NJ 08094
      View Details
    • $475,000
      2,800 SF

      Williamstown Commercial Building - Turnkey Ready

      Prime Williamstown location, fully renovated, includes equipment.
      2517 Fries Mill Rd, Williamstown, NJ 08094
      View Details
    • $1,025,000
      1,000 SF

      Williamstown Retail Property - 7 Acres

      Busy Road, High Visibility, 1000 sqft
      4223 Black Horse Park, Williamstown, NJ 08094
      View Details
    • $449,900
      4,500 SF

      Williamstown Mixed-Use Investment

      Prime Black Horse Pike location, versatile space.
      1520 Black Horse Pike, Williamstown, NJ 08094
      View Details
    • $895,000
      14,000 SF

      High-Traffic Williamstown Mixed-Use

      5-Acre Lot, High Visibility, Huge Potential
      6 Black Horse Pike, Williamstown, NJ 08094
      View Details

    FAQs

    What type of property is this?
    Residential land & home lot - Approved 10-lot residential subdivision in desirable Monroe Township, New Jersey.
    Where is this residential land & home lot located?
    The property is located at Sunnyhill Ave/Mary Duffy Dr Williamstown, NJ.
    What is the asking price?
    The asking price for this property is $799,890.
    What are key features of this property?
    This property features: - Fully approved 10-lot residential subdivision: Skip entitlement risk and accelerate project timeline.; - Located in Monroe Township, New Jersey: A strong demand and growth corridor.; - All subdivision approvals are complete: Documentation available upon request.
    (856) 218-3400
    Request Owner's contact information
    Sunnyhill Ave/Mary Duffy Dr Williamstown, NJ 08094
    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.
    Sunnyhill Ave/Mary Duffy Dr
    Williamstown, NJ 08094
    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
    Sunnyhill Ave/Mary Duffy Dr Williamstown, NJ 08094
    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

    We can help!
    Listing Contact
    Thomas P. Duffy
    Real Estate License ID: 8932672
    (856) 218-3400
    Learn more
    Google sign-in failed. Please try again or use another login method.