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    Diamond Bar, CA Office Buildings for Sale

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    Walnut, CA Los Angeles, CA Phillips Ranch, CA
    Move-in Ready Office Building
    $15,900,000
    54,951 SF
    Move-in Ready Office Building

    1400 Montefino Avenue, Diamond Bar, CA 91765

    55,221 SF office building with easy freeway access.
    • 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
    Updated: Nov 21, 2025
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    Based on your search, we've compiled 80 Potential Opportunities for your consideration. Besides 1 Active listings in Diamond Bar, CA, we suggest exploring several alternatives: 4 properties in Nearby Cities, and similar 71 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 Office Building For Sale
    Contact for pricing
    6,295 SF
    Freestanding Office Building For Sale

    6,295 SF office building with secured parking.

    845 S Oak Park Rd, Covina, CA 91724

    View details
    New Construction Office Building
    $1,600,000
    2,638 SF
    New Construction Office Building

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

    44 Rio Rancho Rd, Pomona, CA 91766

    View details
    Renovated Office Building with Yard
    $949,000
    1,536 SF
    Renovated Office Building with Yard

    Move-in ready office building with secure yard near freeways.

    1420 W Holt Avenue, Pomona, CA 91768

    View details
    Renovated Office Building For Sale
    $4,999,999
    14,112 SF
    Renovated Office Building For Sale

    Newly renovated office building with freeway access and ample parking.

    1161 Park View Dr, Covina, CA 91724

    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.

    Corona Vacant Industrial Lot
    $450,000
    10,890.00 Acres
    Corona Vacant Industrial Lot

    Vacant .25 acre M1-zoned lot near Corona's center.

    467 S Cota Street, Corona, CA 92878

    View details
    Santa Ana Land Development Opportunity
    $758,000
    9,148.00 Acres
    Santa Ana Land Development Opportunity

    Prime Santa Ana lot ideal for development with high visibility.

    846 N Van Ness Avenue, Santa Ana, CA 92701

    View details
    Land with Approved Office Design
    $625,000
    Land with Approved Office Design

    Land with approved plans for a 1,000 sq ft office.

    1227 S Atlantic Blvd South, East Los Angeles, CA 90022

    View details
    Rialto Commercial Lot with Potential
    $100,000
    8,580.00 Acres
    Rialto Commercial Lot with Potential

    8,580 SF commercial lot with residential potential in Rialto.

    0 Acacia, Rialto, CA 92376

    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
    710 SF Lot: 0.93 Acres
    Value Estimation by Request
    Unit 208

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

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    3333 Brea Cyn Rd Ste, Unit 218
    OFFICE BUILDING
    420 SF Lot: 2.40 Acres
    Value Estimation by Request
    Unit 218

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

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    660 Diamond Bar Blvd Ste, Unit 128
    OFFICE BUILDING
    1,540 SF Lot: 1.42 Acres
    Estimated value
    $600,000
    Unit 128

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

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    1470 Vly Vis Dr Ste, Unit 205
    OFFICE BUILDING
    1,560 SF Lot: 3.63 Acres
    Value Estimation by Request
    Unit 205

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

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    3333 Brea Cyn Rd Ste, Unit 119
    OFFICE BUILDING
    920 SF Lot: 2.40 Acres
    Value Estimation by Request
    Unit 119

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

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    660 Diamond Bar Blvd Ste, Unit 208
    OFFICE BUILDING
    840 SF Lot: 1.42 Acres
    Value Estimation by Request
    Unit 208

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

    View details
    640 Diamond Bar Blvd, Unit 7B
    OFFICE BUILDING
    1,704 SF Lot: 6.46 Acres
    Value Estimation by Request
    Unit 7B

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

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    3333 Brea Cyn Rd Ste, Unit 126
    OFFICE BUILDING
    920 SF Lot: 2.40 Acres
    Value Estimation by Request
    Unit 126

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

    View details
    3333 Brea Cyn Rd Ste, Unit 110
    OFFICE BUILDING
    920 SF Lot: 2.40 Acres
    Value Estimation by Request
    Unit 110

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

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    21680 Gtwy Ctr Dr
    OFFICE BUILDING (MULTI-STORY)
    84,188 SF Lot: 1.20 Acres

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

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    Diamond Bar, CA 91765
    OFFICE BUILDING (MULTI-STORY)
    Lot: 10.95 Acres
    Estimated value
    $560,000

    Diamond Bar, CA 91765

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    1470 Vly Vis Dr Ste, Unit 102
    OFFICE BUILDING
    990 SF Lot: 3.63 Acres
    Value Estimation by Request
    Unit 102

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

    View details
    660 Diamond Bar Blvd Ste, Unit 228
    OFFICE BUILDING
    500 SF Lot: 1.42 Acres
    Value Estimation by Request
    Unit 228

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

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    3333 Brea Cyn Rd Ste, Unit 101
    OFFICE BUILDING
    880 SF Lot: 2.40 Acres
    Value Estimation by Request
    Unit 101

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

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    660 Diamond Bar Blvd Ste, Unit 100
    OFFICE BUILDING
    1,200 SF Lot: 1.42 Acres
    Estimated value
    $710,000
    Unit 100

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

    View details
    3333 Brea Cyn Rd Ste, Unit 205
    OFFICE BUILDING
    420 SF Lot: 2.40 Acres
    Value Estimation by Request
    Unit 205

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

    View details
    3333 Brea Cyn Rd Ste, Unit 217
    OFFICE BUILDING
    420 SF Lot: 2.40 Acres
    Value Estimation by Request
    Unit 217

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

    View details
    1470 Vly Vis Dr Ste, Unit 110
    OFFICE BUILDING
    1,220 SF Lot: 3.63 Acres
    Estimated value
    $675,000
    Unit 110

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

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    2705 Diamond Bar Blvd Ste, Unit 118
    OFFICE BUILDING
    1,600 SF Lot: 0.93 Acres
    Estimated value
    $1,665,000
    Unit 118

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

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    2705 Diamond Bar Blvd Ste, Unit 100
    OFFICE BUILDING
    820 SF Lot: 0.93 Acres
    Estimated value
    $1,675,000
    Unit 100

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

    View details
    680 Brea Cyn Rd Ste, Unit 258
    OFFICE BUILDING
    1,470 SF Lot: 0.95 Acres
    Value Estimation by Request
    Unit 258

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

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    680 Brea Cyn Rd
    OFFICE BUILDING
    1,910 SF Lot: 0.95 Acres
    Estimated value
    $1,125,000

    680 Brea Cyn Rd, Diamond Bar, CA 91789-3005

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    1470 Vly Vis Dr Ste, Unit 203
    OFFICE BUILDING
    1,380 SF Lot: 3.63 Acres
    Estimated value
    $640,000
    Unit 203

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

    View details

    Diamond Bar, CA Office Buildings Investment Opportunities Market Analysis

    Explore 72 office buildings for sale in Diamond Bar, CA on our real estate platform. These investment opportunities span a total of 54,951 square feet of properties for sale, with an estimated market value of $15,900,000.

    Sale prices for office properties in Diamond Bar, CA start at $15,900,000, averaging $15,900,000, 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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    Top Commercial Asset Segments

    Office Units 21
    Office buildings 5
    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 median listing prices of real estate assets

    Neighborhood Average Price
    91765 $15.9M

    Taxes & Financing

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

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