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    Diamond Bar, CA Office Spaces 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
    Office Condo with Parking
    Updated: Feb 20
    Office Condo with Parking

    706 N Diamond Bar, Diamond Bar, CA 91765

    $859,900
    Commercial office condo suite in established professional complex on N. Diamond Bar Blvd
    Approximately 1,510 SF suite with functional layout for professional services (buyer to verify permitted uses with city)
    Suite includes reception/waiting area, multiple private offices, and a conference room
    Open bullpen/workspace plus private restroom (if applicable)
    Central air and built in 1982
    View details
    Diamond Bar Commercial Office Condo
    Diamond Bar Commercial Office Condo

    706 Diamond Bar, Diamond Bar, CA 91765

    $859,900
    1,510 sqft

    Well-located office condo ideal for professional services and investment.

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    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.

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    Turn a Listing Into an Investment Snapshot Cap Rate, Potential NOI, Demand score for every listing. Go To Analytics Center
    Diamond Bar Corporate Center Office
    Diamond Bar Corporate Center Office

    1470 Valley Vista Dr 206, Diamond Bar, CA 91765

    $3,579,800
    1.16 AC lot

    Office spaces for sale in Diamond Bar Corporate Center.

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    Retail and Medical Office Center
    Retail and Medical Office Center

    800-880 N Diamond Bar Blvd, Diamond Bar, CA 91765

    Contact for pricing
    59,987 sqft

    Mixed-use retail and medical office center with freeway access.

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    Office Condominium Unit
    Office Condominium Unit

    3333 S Brea Canyon S Road 209, Diamond Bar, CA 91765

    $235,000

    Office condo at 3333 S Brea Canyon Rd with glass-and-steel exterior and abundant natural light, near the 57 and 60 Freeways.

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    Office Condominium with Natural Light
    Office Condominium with Natural Light

    209-3333 S Brea Canyon Rd, Diamond Bar, CA 91765

    $235,000

    Glass-and-steel construction and freeway access support a professional office setting.

    View details
    Based on your search, we've compiled 80 Potential Opportunities for your consideration. Besides 8 Active listings in Diamond Bar, CA, we suggest exploring several alternatives: 4 properties in Nearby Cities, and similar 64 Off-Market properties to explore as potential leads, plus 4 Land Listings that present a potential for development.

    Opportunities in Nearby Cities

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

    Freestanding Medical Office Building
    Freestanding Medical Office Building

    19665 Valley Blvd, Walnut, CA 91789

    $1,695,000

    Purpose-built dental practice with high-quality improvements in Walnut.

    View details
    Office Unit
    Office Unit

    3191 W Temple Ave Unit 105, Pomona, CA 91768

    Contact for pricing
    1,659 sqft

    Office unit offering 1,659 SF for purchase at 3191 W Temple Ave, Unit 105, Pomona.

    View details
    Office Condo Unit
    Office Condo Unit

    3191 W Temple Ave Unit 250, Pomona, CA 91768

    Contact for pricing
    1,454 sqft

    Office unit offered for sale with approximately 1,454 square feet of space.

    View details
    Commercial Lot Near Future Development
    Commercial Lot Near Future Development

    424 S Lemon Avenue, Walnut, CA 91789

    $4,279,000
    2,100 sqft 0.96 AC lot

    Commercial lot with existing structures near future business park.

    View details

    Potential Development Sites for Consideration

    Can't find the perfect fit? These Land listings present an alternative path: the potential to develop a property for your specific goals.

    Important: These AI-suggestions are a starting point, not a guarantee of permitted use. All zoning, permitting, and land use information must be independently verified by you with the appropriate local authorities before making any commitments.

    Flat Industrial Land Parcel
    Flat Industrial Land Parcel

    10234 Olney Street, El Monte, CA 91731

    $430,000
    0.15 AC lot

    Flat industrial land parcel with access to the I-10 highway in El Monte.

    View details
    Prime Commercial Land Opportunity
    Prime Commercial Land Opportunity

    1645 S Euclid, Anaheim, CA 92802

    $1,200,000

    High-traffic location near Disneyland and Anaheim Convention Center.

    View details
    Bellflower Land For Sale
    Bellflower Land For Sale

    17046 Clark, Bellflower, CA 90706

    $474,999
    0.12 AC lot

    Vacant land in Bellflower near freeways, shopping, and restaurants.

    View details
    Corner Commercial Land
    Corner Commercial Land

    912 E Altadena Dr, Altadena, CA 91001

    $1,495,000
    0.30 AC lot

    Corner parcel with prior retail space and rear parking access.

    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

    Diamond Bar, CA Office Spaces Market Trends and Statistics

    Explore 72 office spaces for sale in Diamond Bar, CA, showcased through 8 active listings on our real estate platform. These investment opportunities span a total of 117,662 square feet of properties for sale, with an estimated market value of $21,669,600.

    Sale prices for office spaces in Diamond Bar, CA start at $235,000, averaging $3,611,600, 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.

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    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 $5.4M

    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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