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    Diamond Bar, CA Office Buildings for Sale

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    Los Angeles, CA Lancaster, CA San Diego, 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
    View details
    Based on your search, we've compiled 223 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 214 Off-Market properties to explore as potential leads, plus 4 Land Listings that present a potential for development.

    Explore 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
    Nine-Story Office Building in Pomona
    Contact for pricing

    Nine-Story Office Building in Pomona

    Nine-story office building with on-site management and security.

    300 S Park Ave |, Pomona, CA 91766
    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.

    La Habra Commercial Redevelopment Opportunity
    $1,750,000
    1,948 SF

    La Habra Commercial Redevelopment Opportunity

    18,900 SF lot in high-traffic area, prime for redevelopment.

    720 W La Habra Boulevard, La Habra, CA 90631
    View details
    Commercial Land on Beach Boulevard
    $378,900
    3,049.00 Acres

    Commercial Land on Beach Boulevard

    Prime location for office or retail space in Buena Park.

    6296 Beach Boulevard, Buena Park, CA 90621
    View details
    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

    Explore 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

    2705 Diamond Bar Blvd Ste, Unit 208

    OFFICE BUILDING • 710 SF
    Value Estimation by Request
    2705 Diamond Bar Blvd Ste, Diamond Bar, CA 91765-3554
    View details
    3333 Brea Cyn Rd Ste, Unit 218

    3333 Brea Cyn Rd Ste, Unit 218

    OFFICE BUILDING • 420 SF
    Value Estimation by Request
    3333 Brea Cyn Rd Ste, Diamond Bar, CA 91765-3785
    View details
    660 Diamond Bar Blvd Ste, Unit 128

    660 Diamond Bar Blvd Ste, Unit 128

    OFFICE BUILDING • 1,540 SF
    Value Estimation
    $600,000
    660 Diamond Bar Blvd Ste, Diamond Bar, CA 91765-1034
    View details
    1470 Vly Vis Dr Ste, Unit 205

    1470 Vly Vis Dr Ste, Unit 205

    OFFICE BUILDING • 1,560 SF
    Value Estimation by Request
    1470 Vly Vis Dr Ste, Diamond Bar, CA 91765-3967
    View details
    3333 Brea Cyn Rd Ste, Unit 119

    3333 Brea Cyn Rd Ste, Unit 119

    OFFICE BUILDING • 920 SF
    Value Estimation by Request
    3333 Brea Cyn Rd Ste, Diamond Bar, CA 91765-3783
    View details
    660 Diamond Bar Blvd Ste, Unit 208

    660 Diamond Bar Blvd Ste, Unit 208

    OFFICE BUILDING • 840 SF
    Value Estimation by Request
    660 Diamond Bar Blvd Ste, Diamond Bar, CA 91765-1034
    View details
    640 Diamond Bar Blvd, Unit 7B

    640 Diamond Bar Blvd, Unit 7B

    OFFICE BUILDING • 1,704 SF
    Value Estimation by Request
    640 Diamond Bar Blvd, Diamond Bar, CA 91765-1037
    View details
    3333 Brea Cyn Rd Ste, Unit 126

    3333 Brea Cyn Rd Ste, Unit 126

    OFFICE BUILDING • 920 SF
    Value Estimation by Request
    3333 Brea Cyn Rd Ste, Diamond Bar, CA 91765-3784
    View details
    3333 Brea Cyn Rd Ste, Unit 110

    3333 Brea Cyn Rd Ste, Unit 110

    OFFICE BUILDING • 920 SF
    Value Estimation by Request
    3333 Brea Cyn Rd Ste, Diamond Bar, CA 91765-3782
    View details
    21680 Gtwy Ctr Dr

    21680 Gtwy Ctr Dr

    OFFICE BUILDING (MULTI-STORY) • 84,188 SF
    Value Estimation
    $17,830,000
    21680 Gtwy Ctr Dr, Diamond Bar, CA 91765-2453
    View details
    Diamond Bar, CA 91765

    Diamond Bar, CA 91765

    OFFICE BUILDING (MULTI-STORY) • 10.95 Acres
    Value Estimation
    $560,000
    Diamond Bar, CA 91765
    View details
    1470 Vly Vis Dr Ste, Unit 102

    1470 Vly Vis Dr Ste, Unit 102

    OFFICE BUILDING • 990 SF
    Value Estimation by Request
    1470 Vly Vis Dr Ste, Diamond Bar, CA 91765-3903
    View details
    660 Diamond Bar Blvd Ste, Unit 228

    660 Diamond Bar Blvd Ste, Unit 228

    OFFICE BUILDING • 500 SF
    Value Estimation by Request
    660 Diamond Bar Blvd Ste, Diamond Bar, CA 91765-1055
    View details
    3333 Brea Cyn Rd Ste, Unit 101

    3333 Brea Cyn Rd Ste, Unit 101

    OFFICE BUILDING • 880 SF
    Value Estimation by Request
    3333 Brea Cyn Rd Ste, Diamond Bar, CA 91765-3782
    View details
    660 Diamond Bar Blvd Ste, Unit 100

    660 Diamond Bar Blvd Ste, Unit 100

    OFFICE BUILDING • 1,200 SF
    Value Estimation
    $710,000
    660 Diamond Bar Blvd Ste, Diamond Bar, CA 91765-1034
    View details
    3333 Brea Cyn Rd Ste, Unit 205

    3333 Brea Cyn Rd Ste, Unit 205

    OFFICE BUILDING • 420 SF
    Value Estimation by Request
    3333 Brea Cyn Rd Ste, Diamond Bar, CA 91765-3784
    View details
    3333 Brea Cyn Rd Ste, Unit 217

    3333 Brea Cyn Rd Ste, Unit 217

    OFFICE BUILDING • 420 SF
    Value Estimation by Request
    3333 Brea Cyn Rd Ste, Diamond Bar, CA 91765-3785
    View details
    1470 Vly Vis Dr Ste, Unit 110

    1470 Vly Vis Dr Ste, Unit 110

    OFFICE BUILDING • 1,220 SF
    Value Estimation
    $675,000
    1470 Vly Vis Dr Ste, Diamond Bar, CA 91765-3903
    View details
    2705 Diamond Bar Blvd Ste, Unit 118

    2705 Diamond Bar Blvd Ste, Unit 118

    OFFICE BUILDING • 1,600 SF
    Value Estimation
    $1,665,000
    2705 Diamond Bar Blvd Ste, Diamond Bar, CA 91765-3557
    View details
    2705 Diamond Bar Blvd Ste, Unit 100

    2705 Diamond Bar Blvd Ste, Unit 100

    OFFICE BUILDING • 820 SF
    Value Estimation
    $1,675,000
    2705 Diamond Bar Blvd Ste, Diamond Bar, CA 91765-3557
    View details
    680 Brea Cyn Rd Ste, Unit 258

    680 Brea Cyn Rd Ste, Unit 258

    OFFICE BUILDING • 1,470 SF
    Value Estimation by Request
    680 Brea Cyn Rd Ste, Diamond Bar, CA 91789-3007
    View details
    680 Brea Cyn Rd

    680 Brea Cyn Rd

    OFFICE BUILDING • 1,910 SF
    Value Estimation
    $1,125,000
    680 Brea Cyn Rd, Diamond Bar, CA 91789-3005
    View details
    1470 Vly Vis Dr Ste, Unit 203

    1470 Vly Vis Dr Ste, Unit 203

    OFFICE BUILDING • 1,380 SF
    Value Estimation
    $640,000
    1470 Vly Vis Dr Ste, Diamond Bar, CA 91765-3967
    View details

    Diamond Bar, CA Office Buildings Investment Opportunities Market Analysis

    Explore 215 office buildings for sale in Diamond Bar, CA on our real estate platform. These investment opportunities span a total of 17,025,507 square feet of properties for sale, with an estimated market value of $115,190,000.

    Sale prices for office properties in Diamond Bar, CA start at $205,000, averaging $811,197, and reaching up to $21,845,000 — 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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