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    Well-Maintained Duplex with Detached Garages Title is generated by Realmo AI

    3671 Madison Avenue, San Diego, CA 92116

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    For Sale
    $1,399,900

    Ranch, Duplex - San Diego, CA

    Type:Duplex
    Property size:
    1,505 SF
    Lot size:
    5,139.00 Acres
    Price / SF:
    $930/SF
    Added:
    Jun 5, 2026
    Days on Market:
    1
    Last Refresh:
    Jun 5 at 11:06 pm

    Property Features for 3671 Madison Avenue

    General Information

    Property type
    Residential Multi Family
    Property subtype
    Duplex
    Bedrooms
    4
    Bathrooms
    2
    Rooms
    Bathroom 1, Bathroom 2, Bedroom 1, Bedroom 2, Bedroom 3, Bedroom 4
    Parking
    2
    Parking features
    Garage, Workshop
    Window features
    Double Pane Windows
    Interior features
    Ceiling Fan(s), Living Room Deck Attached, Storage, Window Features: Double Pane Windows
    Exterior features
    Community Features Included: Curbs, Biking, Dog Park, Sidewalks, Suburban, Park, Landscaped, 2-5 Units/Acre, Front Yard
    Standard status
    Active
    APN
    4470510200
    Size
    1,505 SF
    Lot size
    5,139.00 Acres

    Utilities

    Heating system
    Central, Natural Gas
    Cooling system
    Central Air, Electric, Gas (Cooling)

    Building Details

    Year built
    1948
    Floors in Building
    1
    Number of units
    2
    Building materials
    Frame, Stucco
    Roof type
    Shingle
    Architectural style
    Ranch

    We can help!

    Listing Contact
    Jonathan Minerick
    Jonathan Minerick

    Listing agent Jonathan Minerick License #01523060

    Listing office Homecoin.com 600 B St.Ste.300, San Diego, CA

    Listing date Jun 5, 2026

    MLS# TR26121591 Listing URL

    Copyright © 2026 California Regional Multiple Listing Service, Inc. All rights reserved. All information provided by the listing agent/broker is deemed reliable but is not guaranteed and should be independently verified.

    HighLights

    • Duplex with separate utility meters for each unit (gas and electricity) and electronically metered water
    • Remodeled kitchens and bathrooms in 2022; electrical and plumbing upgrades by previous owner
    • Each unit includes its own washer/dryer, with central heat and central air conditioning
    • Two‑car detached garage with workshop plus one additional outdoor parking space
    • Mature fruit trees including lemon and avocado; fully fenced yard with private outdoor spaces for each unit
    • Total annual rental revenue recently $79,200 for long‑term leases; potential ADU opportunity

    Overview

    This well-maintained duplex features a unique design with each unit facing a different street. Each residence offers central heat and air conditioning and has its own in-unit washer and dryer. Kitchens and bathrooms were remodeled in 2022, and the property has electrical and plumbing upgrades completed by the previous owner. The layout is supported by separate utility meters for gas and electricity, along with electronically metered water for each unit.

    The property includes a two-car detached garage with a workshop, plus one additional outdoor parking space. Outdoor areas are abundant and fully fenced, with pavers and pea gravel configured for entertaining and pets, and each unit has its own private spaces. Mature fruit trees, including lemon and avocado, add to the established landscaping.

    From a tenant or owner-operator perspective, the duplex configuration and separate metering can simplify unit-level billing and management. The presence of extra outdoor space and a noted potential ADU opportunity may also appeal to buyers looking to explore additional residential utility within the existing setup. The property’s location is described as being near Adams Avenue, close to Von’s and Ward Canyon Park, in a quiet setting.
    Property Profile 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 Grocery & Convenience Store Gym & Fitness Center

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

    Location Insight

    • Map
    • Local Demand
    City
    San Diego
    County
    San Diego
    State
    California
    Longitude
    -117.1138475
    Latitude
    32.760247

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    FAQs

    What type of property is this?
    Duplex - San Diego duplex near Adams Avenue with remodeled interiors, private outdoor space, and separate utility metering for each unit.
    Where is this duplex located?
    The property is located at 3671 Madison Avenue San Diego, CA.
    What is the asking price?
    The asking price for this property is $1,399,900.
    What are key features of this property?
    This property features: Duplex with separate utility meters for each unit (gas and electricity) and electronically metered water; Remodeled kitchens and bathrooms in 2022; electrical and plumbing upgrades by previous owner; Each unit includes its own washer/dryer, with central heat and central air conditioning
    (888) 400-2513
    We can help!
    Listing Contact
    Jonathan Minerick
    Jonathan Minerick
    Real Estate License ID: 01523060
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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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