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    Newbold Duplex with Custom Finishes Title is generated by Realmo AI

    1721 South 18th Street, Philadelphia, PA 19145

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    For Sale
    $525,000

    Giant duplex with custom finishes, ideal for house hacking.

    Type:Multi-Family / Fee Simple
    Property size:
    1,938 SF
    Price / SF:
    $270/SF
    Added:
    May 12, 2026
    Days on Market:
    25
    Last Refresh:
    May 15 at 10:18 pm

    Property Features for 1721 South 18th Street

    General Information

    Standard status
    Active
    Size
    1,938 SF
    Property subtype
    Multi-Family / Fee Simple

    Building Details

    Year Built
    1915

    We can help!

    Listing Contact
    Jennifer Lee Toadvine

    Listing agent Jennifer Lee Toadvine License #RS352633

    Listing office Space & Company

    Listing date May 12, 2026

    Source Compass

    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 Space & Company

    HighLights

    • Giant duplex on a 16x65 ft lot with custom finishes.
    • Upstairs unit: 3 bed, 2 full bath, roof deck, in‑unit laundry, custom metal work, and bespoke chef's kitchen.
    • Downstairs unit: Renovated in 2018, consistent rental history, full basement access, and private back patio with new fence.
    • Ideal for house hacking with a vacant upstairs unit.
    • Two remodeled units.
    • Located in Newbold (Philadelphia).

    Overview

    This duplex property, situated on a 16x65 ft lot in the Newbold neighborhood, features custom finishes and has been well-maintained by its owners. The upstairs unit, currently vacant, is designed as an owner's unit, featuring three bedrooms, two full bathrooms, a roof deck, and in-unit laundry. One bathroom includes a walk-in shower with glass brick, while the other has a soaking tub. The kitchen is equipped with custom metal work, ample counter space, and natural light. The downstairs unit, renovated in 2018, includes a new bathroom, exposed beams in the kitchen, shaker cabinets, and butcher block counters. It also has full basement access and a back patio with a 6 ft high fence that is 6 months old. The downstairs unit is currently occupied on a month-to-month lease. Both units have in-unit laundry and private outdoor spaces. The property is located in the 19145 MLS Area and the School District of Philadelphia.

    Local Financial Insights For Multifamily LT 5

    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 $50.0k $25.80
    − Vacancy −$2.8k −$1.42
    EGI $47.2k $24.38
    − OpEx −$14.2k −$7.31
    NOI $33.1k $17.06
    1,938 SF · lease $25.80/SF/yr · vacancy 5.51% · expense 30.00%

    Alternative Uses

    Best Use
    Multifamily LT 5
    $472.5K
    $413.4K – $551.2K (±1% cap)
    NOI $33,072 @ 7.0% cap · market cap 6.30%
    Second Best
    Apartment 5plus
    $435.5K
    $381.1K – $508.1K (±1% cap)
    NOI $30,484 @ 7.0% cap · market cap 5.81%
    Theoretical Best
    —
    —
    same as Best Use
    Zoning and permitted uses should be independently verified with local authorities.
    Location Intelligence

    Current Use by Public Records

    Duplexes

    Suggested Use

    Law Firm Restaurant Real Estate Agency Spa & Massage Center Dental Office Hair Salon Nail Salon Food Market Gym & Fitness Center Skin Care Clinic

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

    Location Insight

    • Map
    • Local Demand
    City
    Philadelphia
    County
    Delaware
    State
    Pennsylvania
    Longitude
    -75.1749604
    Latitude
    39.9294348

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    FAQs

    What type of property is this?
    Duplex - Giant duplex with custom finishes, ideal for house hacking.
    Where is this duplex located?
    The property is located at 1721 South 18th Street Philadelphia, PA.
    What is the asking price?
    The asking price for this property is $525,000.
    What are key features of this property?
    This property features: Giant duplex on a 16x65 ft lot with custom finishes.; Upstairs unit: 3 bed, 2 full bath, roof deck, in‑unit laundry, custom metal work, and bespoke chef's kitchen.; Downstairs unit: Renovated in 2018, consistent rental history, full basement access, and private back patio with new fence.
    (215) 208-5213
    We can help!
    Listing Contact
    Jennifer Lee Toadvine
    Real Estate License ID: RS352633
    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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