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    1018 Promenade St Hercules, CA 94547

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    For Sale
    $1,585,000

    MULTI_FAMILY - Hercules, CA

    Property size:
    3,685 SF
    Lot size:
    0.15 Acres
    Price / SF:
    $430/SF
    Added:
    Apr 23, 2026
    Days on Market:
    15
    Last Refresh:
    May 7 at 8:06 pm

    Property Features for 1018 Promenade St

    General Information

    Property type
    Residential Multi Family
    Property subtype
    Other
    Bedrooms
    6
    Bathrooms
    5
    Rooms
    Bedroom 3, Bedroom 1, Bathroom 4, Bedroom 6, Bathroom 3, Bedroom 2, Bedroom 4, Bathroom 5, Bedroom 5, Bathroom 1, Bathroom 2
    Parking features
    Open, Off Street, Alley
    Window features
    Window Coverings
    Interior features
    Updated Baths, Updated Kitchen, Formal Entry, Shower Stall(s), Tub w/Shower Over, Central Vacuum, Sound System
    Exterior features
    Back Yard, Front Yard, Garden/Play, Side Yard, Sprinklers Automatic, Sprinklers Front, Sprinklers Side, Terraced Back, Terraced Up, Landscape Back, Landscape Front, Low Maintenance, Yard Space, Garden, Lawn Sprinkler
    Fireplace
    1
    Appliances
    Disposal, Water Purifier
    Standard status
    Active
    APN
    4044800458
    Size
    3,685 SF
    Lot size
    0.15 Acres

    Utilities

    Heating system
    Radiant, Fireplace(s), Zoned
    Cooling system
    Ceiling Fan(s), Central Air

    Building Details

    Year built
    2002
    Number of units
    2
    Flooring type
    Carpet, Tile, Hardwood, Laminate
    Building materials
    Stucco
    Roof type
    Composition

    We can help!

    Listing Contact
    Marcus Hom

    Listing agent Marcus Hom

    Listing office Security Pacific Real Estate 2300 Henry Ave, Richmond, CA

    Listing date Apr 23, 2026

    MLS# 41132178 Listing URL

    Copyright © 2026 Contra Costa Association of REALTORS®. All rights reserved. All information provided by the listing agent/broker is deemed reliable but is not guaranteed and should be independently verified.

    HighLights

    • Waterfront location steps from shoreline with sunset views, 24 miles to San Francisco.
    • Detached legal ADU apartment/cottage for rental income (approx. $2,000/month) or extended family.
    • Expansive main house with 3,236 sqft including a private Jr. Suite on the 1st floor.
    • Owned 22‑panel solar electricity system.
    • Prime corner lot with large, multi‑tiered backyard and gas fireplace.
    • Extensive custom updates including Marvin windows, high‑capacity A/C, radiant heat, security system, and premium water filtration.

    Overview

    Waterfront Multi-Unit Gem in Hercules

    This multi-unit property is located steps from the shoreline and wetlands, approximately 24 miles from San Francisco. The main house features 3,236 square feet of living space, including a private junior suite on the first floor. A detached legal Accessory Dwelling Unit (ADU) can serve as a separate home office, design studio, or extended living quarters. Custom updates throughout both units include exterior stucco finish, upgraded Marvin dual-pane windows, high-capacity A/C, premium water filtration systems, radiant heated interior floors, built-in custom closet organizers, full home intercom and surround-sound systems, a built-in hardwired security/camera system, customizable LED lighting systems, and a central vacuum system. A 22-panel solar electricity system is owned. Situated on a corner lot of 0.1521 acres, the property includes a multi-tiered backyard with an open gas fireplace and extra private parking. The location provides access to Bay Area job centers and destinations, including Napa and Sonoma Wine Country. Direct bus service from Hercules to San Francisco Salesforce Tower is available.
    Property Profile Insight Report Location Intelligence

    Current Use by Public Records

    Duplexes

    Suggested Use

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

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

    Location Insight

    • Map
    • Local Demand
    City
    Hercules
    County
    Contra Costa
    State
    California
    Longitude
    -122.2893574
    Latitude
    38.0160999

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    FAQs

    What type of property is this?
    Duplex - Multi-unit property near San Francisco with detached ADU and solar.
    Where is this duplex located?
    The property is located at 1018 Promenade St Hercules, CA.
    What is the asking price?
    The asking price for this property is $1,585,000.
    What are key features of this property?
    This property features: Waterfront location steps from shoreline with sunset views, 24 miles to San Francisco.; Detached legal ADU apartment/cottage for rental income (approx. $2,000/month) or extended family.; Expansive main house with **3,236 sqft including a private Jr. Suite on the 1st floor.**
    (510) 219-0802
    We can help!
    Listing Contact
    Marcus Hom
    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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