Diamond Bar, CA Office Spaces for Lease

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Updated: Mar 26

Diamond Bar Office Space Available

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

$39 SF/Yr

2,596 sqft

Office space available
Two spaces available
Size range: 2,370 SqFt - 2,596 SqFt

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Updated: Nov 21, 2025

Freeway-Visible Diamond Bar Office Space

1360 Valley Vista Dr., Diamond Bar, CA 91765

$900/Mo per office

20,064 sqft

Freeway‑visible professional office building in Diamond Bar Corporate Center.
Walking distance to Diamond Bar City Hall, Holiday Inn Hotel, Kaiser Permanente, and city library.
Numerous eateries off the highway, including popular fast‑food and classic restaurants.
Common use kitchen, meeting room, and reception area available.
Diverse tenant mix including Education, Lawyers, Accounting, and Medical‑related offices.

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Office Unit with Private Offices

1300 Valley Vista Dr #205A, Diamond Bar, CA 91765

$2,200/Mo

Professional suite near the 57 and 60 freeways with a kitchen area and remodeled restrooms.

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Office Unit With Private Offices

205-2707 S Diamond Bar Blvd, Diamond Bar, CA 91765

$2,950/Mo

Flexible professional workspace includes reception, break room, restroom, and central heating and cooling.

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Office Unit with Private Offices

21015 Pathfinder Rd, Diamond Bar, CA 91789

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1,113 sqft

Office layout combines enclosed rooms with an open work area for day-to-day operations.

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First-Floor Office Suite

556 N Diamond Bar Blvd, Diamond Bar, CA 91765

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1,214 sqft

First-floor office space offering approximately 1,214 square feet of working area in a commercial setting.

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Second-Floor Office Suite

556 N Diamond Bar Blvd, Diamond Bar, CA 91765

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1,225 sqft

Second-floor office space offered for lease.

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Diamond Bar Office Space Sublease

1081 Grand Ave, Diamond Bar, CA 91765

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4,668 sqft

Office space available for sublease in Diamond Bar, CA.

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Diamond Bar Commercial Office Space

3230 Fallow Field Dr, Diamond Bar, CA 91765

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21,300 sqft

Commercial office space for lease, suitable for various businesses.

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First-Floor Office Suite

3333 S Diamond Canyon Rd, Diamond Bar, CA 91765

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570 sqft

First-floor office suite in a two-story building with a perimeter office layout and unit renovations underway.

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Diamond Bar Office Space Available

1550 Valley Vista Drive, Diamond Bar, CA 91765

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17,616 sqft

Office space available for lease in Diamond Bar, California.

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Diamond Bar Office Space Available

3333 South Diamond Canyon Road, Diamond Bar, CA 91765

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17,247 sqft

Available office space in Diamond Bar, California.

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Revitalizing Retail Space

900-990 N Diamond Bar Blvd, Diamond Bar, CA 91765

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Retail suites are undergoing center-wide paving, painting, and landscaping improvements.

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Diamond Bar Office Space

732 N Diamond Bar Blvd, Diamond Bar, CA 91765

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Office space available for rent in Diamond Bar, California.

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First-Floor Medical Office Space

888 Brea Canyon Rd, Bldg 1, Diamond Bar, CA 91789

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1,195 sqft

Ground-level suite suited to medical and professional office operations.

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Second-Floor Office Space

1550 Valley Vista Dr, Diamond Bar, CA 91765

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6,423 sqft

Second-floor office suite available for lease, with a reduced incentive rate for the initial 12 months.

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Based on your search, we've compiled 28 Potential Opportunities for your consideration. Besides 16 Active listings in Diamond Bar, CA, we suggest exploring alternatives. Consider Similar 4 Spaces in Nearby Cities, and Similar 8 Properties for Sales.

Office Spaces for Lease in Nearby Cities

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

Coworking and Private Offices with Flexible Terms at CA, Pomona - Rancho Camino Dr. Contact us today to book a tour!

21 Rancho Camino Dr, Pomona, CA 91766

16 available spaces from 11 to 1,496 sqft

$129-$19,560/Mo per office

(972) 764-8885

Flexible workspace in CA, Pomona - Rancho Camino Dr. Book a tour & get info

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Flex Space with Warehouse

727 S Brea Canyon Rd, Walnut, CA 91789

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1,687 sqft

Office and warehouse components support flexible commercial operations in a multi-tenant building.

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Freestanding Flex Building

Walnut, CA 91789

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109,448 sqft

Standalone industrial facility combines office space with high-clearance loading and substantial electrical capacity.

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Medical Office Sublease Space

3191 W Temple Ave, Pomona, CA 91768

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Office suite available via sublease through 6/30/2028 with medical use approved and furniture available.

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Similar Spaces for Sale in Diamond Bar, CA

Consider Similar Space for Sale. We found 8 Spaces matching your search parameters.

Professional Office Condo

706 N Diamond Bar, Diamond Bar, CA 91765

$859,900

1,510 sqft

Functional commercial suite with reception, private offices, conference space, and open workspace in an established professional complex.

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Diamond Bar Corporate Center Office

1470 Valley Vista Dr 206, Diamond Bar, CA 91765

$3,579,800

20,000 sqft 1.16 AC lot

Luxurious office units available for purchase in Diamond Bar.

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Three-Story Multi-Tenant Office Building

556 N Diamond Bar Blvd, Diamond Bar, CA 91765

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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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Move-in Ready Office Building

1400 Montefino Avenue, Diamond Bar, CA 91765

$15,900,000

54,951 sqft

55,221 SF office building with easy freeway access.

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Office Condo with Parking

706 N Diamond Bar, Diamond Bar, CA 91765

$859,900

Office condo suite includes reception, private offices, conference room, workspace, and a private restroom in a professional complex.

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Office Building

660 N Diamond Bar Ste 100, Diamond Bar, CA 91765

$798,000

Office property with an established 1982 construction date.

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Retail and Medical Office Center

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

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59,987 sqft

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

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Diamond Bar Corporate Center Office

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

$3,875,600

Office spaces for sale in Diamond Bar Corporate Center.

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Diamond Bar, CA Office Spaces Lease Rates & Market Statistics

Explore 16 Office Spaces for lease in Diamond Bar, CA on Realmo, a commercial real estate exchange covering the Diamond Bar area. The current inventory totals 95,231 square feet of properties — an average of ~5,950 SF per listing.

Office Spaces lease rates in Diamond Bar range from $39 SF/Yr at the entry level to $39 SF/Yr at the top of the market, averaging $39 SF/Yr. Pricing across the market is relatively uniform, which simplifies like-for-like comparison between listings. At $39 SF/Yr, the local average runs 58% above California's state average of $24.62 SF/Yr.

Diamond Bar accounts for 1% of the 2,039 office spaces currently available across Los Angeles County, where nearby markets include Los Angeles and Santa Monica.

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