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    Diamond Bar, CA
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    Diamond Bar, CA Office Buildings for Sale

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    Move-in Ready Office Building
    Updated: Nov 21, 2025
    Move-in Ready Office Building

    1400 Montefino Avenue, Diamond Bar, CA 91765

    $15,900,000
    54,951 sqft
    Move‑in ready condition
    Entire building available with 55,221 Rentable Square Feet, divisible to 27,494 Rentable Square Feet
    Ample free parking: 3.98/1000, 220 total spaces
    Large open floor plate
    Easy access to 60/57 freeways
    View details

    This listing looks promising.

    Here's a quick look at some key insights for

    1400 Montefino Avenue, Diamond Bar, CA 91765

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    • Est. Cap Rate

      7.6%
      Above avg (5.9%)

    • Est. NOI

      $1.2M
      Annual

    • Mortgage

      $8M
      Feb 2017

    • Last Sold

      Sep 2011
      $6.5M

    • Property Type

      Office Building
      Built 1985
    View Property Analytics
    OB-Zoned Office Building
    Updated: Aug 22
    OB-Zoned Office Building

    1470 Valley Vista Dr Ste 206, Diamond Bar, CA 91765

    $3,875,600
    8,960 sqft
    8,960 SF office building
    Constructed in 1988
    OB zoning
    1 unit available
    Customizable layout
    View details
    Three-Story Multi-Tenant Office Building
    Three-Story Multi-Tenant Office Building

    556 N Diamond Bar Blvd, Diamond Bar, CA 91765

    Contact for pricing
    1,214 sqft 2.76 AC lot

    Class B office building with on-site parking and a reciprocal agreement adding nearby stalls for tenants.

    View details
    Based on your search, we've compiled 76 Potential Opportunities for your consideration. Besides 3 Active listings in Diamond Bar, CA, we suggest exploring several alternatives: 4 properties in Nearby Cities, and similar 69 Off-Market properties to explore as potential leads

    Opportunities in Nearby Cities

    Here are 4 Similar properties we found in Nearby Locations for your consideration.

    Four-Suite Office Building
    Four-Suite Office Building

    669 S 2nd Ave, Covina, CA 91723

    $1,400,000

    Individually metered suites feature private restrooms, central air conditioning, and separate staff access.

    View details
    Office Building
    Office Building

    75 Rancho Camino Dr, Pomona, CA 91766

    Contact for pricing
    100,000 sqft

    Large office property offering 100,000 SF for sale at 75 Rancho Camino Dr.

    View details
    New Construction Office Building
    New Construction Office Building

    44 Rio Rancho Rd, Pomona, CA 91766

    Contact for pricing
    2,638 sqft

    2,638 SF office building with secure parking for sale.

    View details
    Renovated Office Building For Sale
    Renovated Office Building For Sale

    1161 Park View Dr, Covina, CA 91724

    Contact for pricing
    14,112 sqft

    Newly renovated office building with freeway access and ample parking.

    View details

    Off-Market Properties in Diamond Bar, CA

    Consider similar Off-Market properties in Diamond Bar, CA. You may contact the owners directly to inquire about their potential intentions to sell. To help you make a strong first impression, we can assist by reaching out to these owners with compelling proposals created using our AI tool.

    2705 Diamond Bar Blvd Ste, Unit 208
    OFFICE BUILDING

    2705 Diamond Bar Blvd Ste, Diamond Bar, CA 91765-3554

    Unit 208
    $295,000
    Estimated value
    710 sqft 0.93 AC lot
    View details
    3333 Brea Cyn Rd Ste, Unit 218
    OFFICE BUILDING

    3333 Brea Cyn Rd Ste, Diamond Bar, CA 91765-3785

    Unit 218
    $270,000
    Estimated value
    420 sqft 2.40 AC lot
    View details
    660 Diamond Bar Blvd Ste, Unit 128
    OFFICE BUILDING

    660 Diamond Bar Blvd Ste, Diamond Bar, CA 91765-1034

    Unit 128
    $600,000
    Estimated value
    1,540 sqft 1.42 AC lot
    View details
    1470 Vly Vis Dr Ste, Unit 205
    OFFICE BUILDING

    1470 Vly Vis Dr Ste, Diamond Bar, CA 91765-3967

    Unit 205
    $300,000
    Estimated value
    1,560 sqft 3.63 AC lot
    View details
    3333 Brea Cyn Rd Ste, Unit 119
    OFFICE BUILDING

    3333 Brea Cyn Rd Ste, Diamond Bar, CA 91765-3783

    Unit 119
    $265,000
    Estimated value
    920 sqft 2.40 AC lot
    View details
    660 Diamond Bar Blvd Ste, Unit 208
    OFFICE BUILDING

    660 Diamond Bar Blvd Ste, Diamond Bar, CA 91765-1034

    Unit 208
    $315,000
    Estimated value
    840 sqft 1.42 AC lot
    View details
    640 Diamond Bar Blvd, Unit 7B
    OFFICE BUILDING

    640 Diamond Bar Blvd, Diamond Bar, CA 91765-1037

    Unit 7B
    $310,000
    Estimated value
    1,704 sqft 6.46 AC lot
    View details
    3333 Brea Cyn Rd Ste, Unit 126
    OFFICE BUILDING

    3333 Brea Cyn Rd Ste, Diamond Bar, CA 91765-3784

    Unit 126
    $470,000
    Estimated value
    920 sqft 2.40 AC lot
    View details
    3333 Brea Cyn Rd Ste, Unit 110
    OFFICE BUILDING

    3333 Brea Cyn Rd Ste, Diamond Bar, CA 91765-3782

    Unit 110
    $430,000
    Estimated value
    920 sqft 2.40 AC lot
    View details
    21680 Gtwy Ctr Dr
    OFFICE BUILDING (MULTI-STORY)

    21680 Gtwy Ctr Dr, Diamond Bar, CA 91765-2453

    $17,830,000
    Estimated value
    84,188 sqft 1.20 AC lot
    View details
    Diamond Bar, CA 91765
    OFFICE BUILDING (MULTI-STORY)

    Diamond Bar, CA 91765

    $560,000
    Estimated value
    10.95 AC lot
    View details
    1470 Vly Vis Dr Ste, Unit 102
    OFFICE BUILDING

    1470 Vly Vis Dr Ste, Diamond Bar, CA 91765-3903

    Unit 102
    $390,000
    Estimated value
    990 sqft 3.63 AC lot
    View details
    660 Diamond Bar Blvd Ste, Unit 228
    OFFICE BUILDING

    660 Diamond Bar Blvd Ste, Diamond Bar, CA 91765-1055

    Unit 228
    $350,000
    Estimated value
    500 sqft 1.42 AC lot
    View details
    3333 Brea Cyn Rd Ste, Unit 101
    OFFICE BUILDING

    3333 Brea Cyn Rd Ste, Diamond Bar, CA 91765-3782

    Unit 101
    $285,000
    Estimated value
    880 sqft 2.40 AC lot
    View details
    660 Diamond Bar Blvd Ste, Unit 100
    OFFICE BUILDING

    660 Diamond Bar Blvd Ste, Diamond Bar, CA 91765-1034

    Unit 100
    $710,000
    Estimated value
    1,200 sqft 1.42 AC lot
    View details
    3333 Brea Cyn Rd Ste, Unit 205
    OFFICE BUILDING

    3333 Brea Cyn Rd Ste, Diamond Bar, CA 91765-3784

    Unit 205
    $235,000
    Estimated value
    420 sqft 2.40 AC lot
    View details
    3333 Brea Cyn Rd Ste, Unit 217
    OFFICE BUILDING

    3333 Brea Cyn Rd Ste, Diamond Bar, CA 91765-3785

    Unit 217
    $275,000
    Estimated value
    420 sqft 2.40 AC lot
    View details
    1470 Vly Vis Dr Ste, Unit 110
    OFFICE BUILDING

    1470 Vly Vis Dr Ste, Diamond Bar, CA 91765-3903

    Unit 110
    $680,000
    Estimated value
    1,220 sqft 3.63 AC lot
    View details
    2705 Diamond Bar Blvd Ste, Unit 118
    OFFICE BUILDING

    2705 Diamond Bar Blvd Ste, Diamond Bar, CA 91765-3557

    Unit 118
    $1,710,000
    Estimated value
    1,600 sqft 0.93 AC lot
    View details
    2705 Diamond Bar Blvd Ste, Unit 100
    OFFICE BUILDING

    2705 Diamond Bar Blvd Ste, Diamond Bar, CA 91765-3557

    Unit 100
    $1,710,000
    Estimated value
    820 sqft 0.93 AC lot
    View details
    680 Brea Cyn Rd Ste, Unit 258
    OFFICE BUILDING

    680 Brea Cyn Rd Ste, Diamond Bar, CA 91789-3007

    Unit 258
    $345,000
    Estimated value
    1,470 sqft 0.95 AC lot
    View details

    Diamond Bar, CA Office Buildings Market Trends and Statistics

    Explore 72 office buildings for sale in Diamond Bar, CA, showcased through 3 active listings on our real estate platform. These investment opportunities span a total of 65,125 square feet of properties for sale, with an estimated market value of $19,775,600.

    Sale prices for office properties in Diamond Bar, CA start at $3,875,600, averaging $9,887,800, and reaching up to $15,900,000 — offering options for a variety of budgets and business needs. Daily updated analytics ensure you stay ahead with the latest data and market trends.

    List
    Map

    Top Commercial Asset Segments

    Commercial property segments ranked by active listings on the market

    Office Units 26
    Office buildings 4
    Medical Office Space 2
    Coworking space 1
    Serviced offices 1

    Demographics Overview

    Population 86K
    Population Growth (5Y) -6.5%
    Median Household Income $114,768
    College Educated 71.4%

    High-Yield Neighborhoods for Investment

    Identify Diamond Bar submarkets with the highest inventory density on the market and evaluate the average listing prices of real estate assets

    Neighborhood Average Price
    91765 $13.3M

    Taxes & Financing

    Tax Rate (average for all types) 1.27%
    Property Tax per SF $24.97 per SF
    Tax Rate vs County Average 0.03 pp above county avg
    Average Loan-to-Value 65.0%

    Listings Trend

    New vs delisted commercial listings in Los Angeles County

    New Delisted

    Total CRE Inventory on Market (SF)

    Average Property Price per SF

    For-sale pricing trends across core commercial property types in Los Angeles County

    Retail

    Office

    Residential Income

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