Add Listing
    For Lease
    • For Sale
    • For Lease
    • Recently Sold
    • Property Lookup
    • Brokers
    AI Search
    Back to Search
    The Largest CRE Database in the US with Over 1 Million Listings

    21680 Gateway Center Dr. #230 Diamond Bar, CA 91765

    View on Map
    Claim this Listing
    Loading data...
    Loading data...
    Loading data...
    For Lease
    Contact for pricing

    Office space available for rent in Diamond Bar, California.

    Type:Office
    Added:
    Apr 2, 2026
    Days on Market:
    21
    Last Refresh:
    Apr 2 at 8:11 pm

    Property Features for 21680 Gateway Center Dr. #230

    General Information

    Standard status
    Active
    Property subtype
    Office

    Building Details

    Year Built
    2026

    We can help!

    Listing Contact
    Sean Kern
    Sean Kern

    Listing agent Sean Kern

    Listing office Cushman & Wakefield Diamond Bar

    Listing date Apr 2, 2026

    Source Cushmanwakefield

    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 Cushman & Wakefield Diamond Bar

    Overview

    Office Space Available For Rent

    Located in Diamond Bar, California, this commercial real estate offers office spaces for rent. The property is suitable for office use.
    Location Intelligence

    Current Use by Public Records

    Office properties & Spaces

    Suggested Use

    Restaurant Real Estate Agency Law Firm Building Supply Spa & Massage Center Dental Office Big Box & Wholesale Store Auto Repair Shop Hair Salon Nail Salon

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

    Similar Places Nearby

    • Digital Forensics Corp — 1370 Valley Vista Dr, Diamond Bar, CA 91765
    • Tony Xu & Associates — 1661 Aspen Grove Ln, Diamond Bar, CA 91765
    • Network Thinking Solutions — 1370 Valley Vista Dr #200, Diamond Bar, CA 91765
    • Digital Forensics — 1370 valley vista dr, diamond bar, ca 91765

    Location Insight

    • Map
    • Local Demand
    City
    Diamond Bar
    County
    Los Angeles
    State
    California
    Longitude
    -117.833176
    Latitude
    33.999949

    Nearby Similar for Lease

    • Contact for pricing

      Freeway-Visible Diamond Bar Office Space

      Professional office building with flexible lease terms and various amenities.
      1360 Valley Vista Dr., Diamond Bar, CA 91765
      View Details
    • Sponsored
      Contact for pricing

      CA, Diamond Bar - Gateway Center

      1370 Diamond Bar California United States Of America 91765, Diamond Bar, CA 91765
      View Details
    • $1.50/mo

      Retail Space with Building Signage

      In-line retail space available for lease with building signage.
      514 North Diamond Bar Boulevard, Diamond Bar, CA 91765
      View Details
    • $1.70/mo

      Small Industrial Unit For Sublease

      2,338 SF industrial unit available for sublease through 10/31/2027.
      817 South Lemon Avenue, Diamond Bar, CA 91789
      View Details
    • $1.49/mo

      Freeway Access Business Park Space

      High image business park with excellent freeway access.
      20416 E Walnut Dr Unit 2F, Diamond Bar, CA 91789
      View Details
    • $1.95/mo

      Fully Leased Diamond Bar Office

      Office building in Diamond Bar, CA, currently 100% leased.
      732 N Diamond Bar Blvd, Diamond Bar, CA
      View Details
    • $2/mo

      Diamond Bar Office Space Available

      Third-floor office space available for rent in Diamond Bar.
      556 N Diamond Bar Blvd, Diamond Bar, CA
      View Details
    • $2/mo

      Diamond Bar Office Space Sublease

      Office space available for sublease in Diamond Bar, CA.
      1081 Grand Ave, Diamond Bar, CA
      View Details
    • $2/mo

      Diamond Bar Office Space Available

      Available office space in Diamond Bar, California.
      3333 South Diamond Canyon Road, Diamond Bar, CA, 91765
      View Details
    • $2/mo

      Diamond Bar Office Space Available

      Office space available for lease in Diamond Bar, California.
      1550 Valley Vista Drive, Diamond Bar, CA, 91765
      View Details
    • $2/mo

      Retail Space Available For Rent

      Retail space available for lease in Diamond Bar, CA.
      570-578 N Diamond Bar Blvd, Diamond Bar, CA
      View Details
    • $1.50/mo

      Diamond Bar Retail/Office Suite

      Retail or office suite available for lease in Diamond Bar.
      514-518 N Diamond Bar Blvd, Diamond Bar, CA
      View Details

    FAQs

    What type of property is this?
    Office property - Office space available for rent in Diamond Bar, California.
    Where is this office property located?
    The property is located at 21680 Gateway Center Dr. #230 Diamond Bar, CA.
    What are key features of this property?
    This property features: New construction: Year Built 2026.; Office space available for rent.; Property Type: Office Space
    (909) 942-4691
    We can help!
    Listing Contact
    Sean Kern
    Sean Kern
    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

    Google sign-in failed. Please try again or use another login method.
    Sign Up Successful!
    You now have access to more from Realmo!