Add Listing
    For Lease
    • For Sale
    • For Lease
    • Recently Sold
    • Property Lookup
    • Brokers
    Back to Search
    Historic Building in Central Business Title is generated by Realmo AI

    4001 Main St, Riverside, CA 92501

    View on Map
    Claim this Listing
    Loading data...
    Loading data...
    Loading data...
    For Lease
    $2 SF/Yr $1,870/Mo (calc)

    Iconic property undergoing restoration for office and retail tenants.

    Type:Office
    Property size:
    8,160 SF
    Added:
    Nov 26, 2025
    Days on Market:
    171
    Last Refresh:
    Apr 5 at 9:29 pm

    Property Features for 4001 Main St

    General Information

    Standard status
    Active
    Size
    8,160 SF
    Property subtype
    Office

    Building Details

    Year Built
    1925

    Spaces For Lease

    at 4001 Main St Contact us

    We can help!

    Listing Contact
    Lindsay MIngee
    Lindsay MIngee

    Listing agent Lindsay MIngee License #CalDRE #01920658

    Listing office Lee & Associates

    Listing date Nov 26, 2025

    Source Lee-associates

    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 Lee & Associates

    HighLights

    • Prime location steps from courthouses and City Hall in Riverside's Central Business District.
    • Historic 1925 Art Deco building undergoing restoration, offering unique and charming space.
    • Walkable access to numerous downtown amenities and plentiful metered street parking.
    • Open floor plan with men and women en‑suite restrooms.
    • High ceilings and floor‑to‑ceiling windows.
    • Storefront (under construction) and potential access to build basement.

    Overview

    This historic building is available for lease in Riverside’s Central Business District, steps from courthouses and City Hall. The iconic property is undergoing restoration to offer a unique and charming space for small office and retail tenants. The property features classic Art Deco architecture with high ceilings and floor-to-ceiling windows. The available space offers an open floor plan with men's and women's en-suite restrooms. Storefront is under construction, with potential access to build a basement. The property benefits from walkable access to numerous downtown amenities and plentiful metered street parking. The lease rate is MGR Modified Gross, meaning that tenants will pay separately for their electric utility service and interior janitorial services. The property size is 8160 square feet.
    Property Profile Insight Report Location Intelligence

    Current Use by Public Records

    Thompson Medical Clinic Medical Group Provident Bank Bank

    Suggested Use

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

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

    Location Insight

    • Map
    • Local Demand
    City
    Riverside
    County
    Riverside
    State
    California
    Longitude
    -117.376
    Latitude
    33.98

    Nearby Similar for Lease

    • $975/Mo
      1,000 SF

      Riverside Office Suite For Lease

      Well-maintained office suite in Riverside with flexible workspace.
      6630 Doolittle, Riverside, CA 92503
      View Details
    • $5,720/Mo
      2,080 SF

      Riverside Retail Space For Lease

      Retail space in a prime location near Target.
      3271 Arlington Ave, Riverside, CA 92506
      View Details
    • $5,500/Mo
      1,132 SF

      Furnished Office Space Near Courthouse

      Professional office space for lease near downtown Riverside courts.
      3895 Brockton, Riverside, CA 92501
      View Details
    • Contact for pricing
      10,981 SF

      Retail Space in Empire Plaza

      Highly visible retail center with flexible layout in Riverside, CA.
      10759 Magnolia, Riverside, CA 92505
      View Details
    • Contact for pricing
      10,981 SF

      Retail Space in Empire Plaza

      Highly visible retail space in a bustling Riverside location.
      10759 Magnolia, Riverside, CA 92505
      View Details
    • $6,720/Mo
      5,600 SF

      Riverside Contractor Storage Yard

      Spacious, secure yard with office and storage for contractors.
      5925 Payton Avenue, Riverside, CA 92504
      View Details
    • $5,720/Mo
      2,080 SF

      Riverside Retail Space For Rent

      Retail space available in a well-located Riverside shopping center.
      3271 Arlington Ave,, Riverside, CA 92506
      View Details
    • $5,500/Mo

      Furnished Office Space Near Courthouse

      Professional office space for lease near downtown Riverside.
      3895 Brockton, Riverside, CA 92501
      View Details
    • $1.95 SF/Yr
      2,562 SF

      Riverside Medical Office Space

      Move-in ready orthodontics office in downtown Riverside.
      3731 Tibbetts St, Riverside, CA 92506
      View Details
    • $2 SF/Yr
      45,891 SF

      Riverside Office Building For Rent

      Office building in Riverside's Meridian business park, Inland Empire.
      14350 Meridian Parkway, Riverside, CA, 92518
      View Details
    • $2 SF/Yr
      13,646 SF

      Riverside Medical Building Office Space

      Modern office suites in Riverside's Magnolia Center district.
      6900 Brockton Ave Ste 203, Riverside, CA 92506
      View Details
    • $2.00 SF/Yr
      19,751 SF

      Two-Story Office Building Available

      Two-story office building for lease near 60 Freeway.
      2000 Market Street, Riverside, CA 92501
      View Details

    FAQs

    What type of property is this?
    Office units - Iconic property undergoing restoration for office and retail tenants.
    Where is this office units located?
    The property is located at 4001 Main St Riverside, CA.
    What is the lease rate?
    The lease rate is $2 SF/Yr.
    What are key features of this property?
    This property features: Prime location steps from courthouses and City Hall in Riverside's Central Business District.; Historic 1925 Art Deco building undergoing restoration, offering unique and charming space.; Walkable access to numerous downtown amenities and plentiful metered street parking.
    (714) 564-7128
    We can help!
    Listing Contact
    Lindsay MIngee
    Lindsay MIngee
    Real Estate License ID: CalDRE #01920658
    Learn More
    Request Owner's contact information
    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.
    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
    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

    Thank You for Inquiry
    4001 Main St, Riverside, CA 92501
    letter with green check mark
    Check your email
    We sent you the
    agent's contact details. yellow underline
    Can't find it?
    Please check your junk/spam folder.
    Google sign-in failed. Please try again or use another login method.
    Sign Up Successful!
    You now have access to more from Realmo!