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    Mixed-Use Property in San Bruno Title is generated by Realmo AI

    521 San Mateo Avenue, San Bruno, CA 94066

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    For Sale
    $1,195,000

    Three-unit mixed-use property with residential flat and retail spaces.

    Type:Commercial
    Property size:
    3,877 SF
    Price / SF:
    $308/SF
    Added:
    Jan 29, 2026
    Days on Market:
    125
    Last Refresh:
    Apr 5 at 9:02 pm

    Property Features for 521 San Mateo Avenue

    General Information

    Standard status
    Active
    Size
    3,877 SF
    Property subtype
    Commercial

    Building Details

    Year Built
    1911

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    Listing Contact
    MICHAEL SILVA

    Listing agent MICHAEL SILVA

    Listing office COMPASS

    Listing date Jan 29, 2026

    Source Corcoran

    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 COMPASS

    HighLights

    • Mixed‑use property with residential and retail units offers diverse income potential.
    • Large (approx. 2000 sq ft) renovated 3‑bedroom, 2‑bath residential flat with private entrance.
    • Two ground‑floor retail spaces, each approximately 850 sq ft, currently occupied by established businesses.
    • Renovated residential flat features a large eat‑in kitchen, spacious living room, and primary bedroom with bath.
    • Property includes a 1965 sq ft basement, offering additional space.
    • Residential unit benefits from double‑pane windows, central heating, and abundant natural light.

    Overview

    Located at 519-521 San Mateo Ave in San Bruno, this mixed-use property features a three-unit configuration with residential and retail components. The property includes an expansive, renovated second-floor residential flat of approximately 2000 square feet, featuring three bedrooms and two bathrooms. The flat has a private entrance, a large eat-in kitchen, a spacious living room, a primary bedroom and bath, a large foyer, double-pane windows, central heating, and natural light. The ground floor comprises two retail spaces, each approximately 850 square feet. One retail space, located at 519 San Mateo Ave, is occupied by Fabulously Antiques and Wonderful Things, an antique shop. The other, at 521 San Mateo Ave, is a salon called Salon 11. The property has a total square footage of approximately 5708 square feet, including a 1965 square foot basement. The total property size is 3877 square feet, presenting an opportunity for investors or owner-users.
    Property Profile Location Intelligence

    Current Use by Public Records

    Salon Eleven:11 Hair Salon De Luxe Barber ... Barber Shop

    Suggested Use

    Law Firm Restaurant Real Estate Agency Spa & Massage Center Dental Office Hair Salon Nail Salon Food Market Gym & Fitness Center Grocery & Convenience Store

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

    Location Insight

    • Map
    • Local Demand
    City
    San Bruno
    County
    San Mateo
    State
    California
    Longitude
    -122.412
    Latitude
    37.6254

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    FAQs

    What type of property is this?
    Mixed-use property - Three-unit mixed-use property with residential flat and retail spaces.
    Where is this mixed-use property located?
    The property is located at 521 San Mateo Avenue San Bruno, CA.
    What is the asking price?
    The asking price for this property is $1,195,000.
    What are key features of this property?
    This property features: Mixed‑use property with residential and retail units offers diverse income potential.; Large (approx. 2000 sq ft) renovated 3‑bedroom, 2‑bath residential flat with private entrance.; Two ground‑floor retail spaces, each approximately 850 sq ft, currently occupied by established businesses.
    (415) 660-9955
    We can help!
    Listing Contact
    MICHAEL SILVA
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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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    521 San Mateo Avenue, SAN BRUNO, CA 94066
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