Block21

500 East 3rd Avenue, San Mateo, CA 94401

Property Information

  • For Lease Contact for pricing
  • Property Type Office - General Office
  • Property Size 198,572 SF
  • Lot Size 1.5 Acre
  • Parking Spaces Avail. 353
  • Parking Ratio 1.78 / 1,000 SF
  • Property Tenancy Vacant
  • Date Updated May 21, 2026

Description

Block21 is a 198,572-square-foot office building situated on a 1.5-acre lot, offering 353 parking spaces with a parking ratio of 1.78 per 1,000 square feet. The property combines functionality and convenience, making it well-suited for diverse office needs. With its modern design and spacious layout, Block21 provides a professional environment for tenants seeking a general office space in San Mateo.

Nestled in North Central San Mateo, the building enjoys proximity to a variety of amenities. Dining options like Saigon City and Jack in the Box are just steps away, while several parking garages, including Kiku Crossing Parking Garage and Main Street Parking Garage, are within walking distance. For commuters, Hayward Park station is approximately 1.1 miles away, offering convenient transit access. Additional nearby points of interest include hotels such as Super 8 Motel, located 0.66 miles away, and EVgo charging stations within 0.2 miles, catering to diverse tenant needs.

5 Spaces Available

1st Floor

Space Type

General Office

Lease Rate

Contact for pricing

Total Space

48,682 SF

Floor

1

Divisible Space

48,682 - 48,682 SF

Available Date

Immediate

Renewal Option

Yes

Sublease

No

2nd Floor

Space Type

General Office

Lease Rate

Contact for pricing

Total Space

63,616 SF

Floor

2

Divisible Space

63,616 - 63,616 SF

Available Date

Immediate

Renewal Option

Yes

Sublease

No

3rd Floor

Space Type

General Office

Lease Rate

Contact for pricing

Total Space

62,622 SF

Floor

3

Divisible Space

62,622 - 62,622 SF

Available Date

Immediate

Renewal Option

Yes

Sublease

No

4th Floor

Space Type

General Office

Lease Rate

Contact for pricing

Total Space

14,081 SF

Floor

4

Divisible Space

14,081 - 14,081 SF

Available Date

Immediate

Renewal Option

Yes

Sublease

No

5th Floor

Space Type

General Office

Lease Rate

Contact for pricing

Total Space

7,211 SF

Floor

5

Divisible Space

7,211 - 7,211 SF

Available Date

Immediate

Renewal Option

Yes

Sublease

No

Contacts

Robert McSweeney

CBRE

Patrick Reilly

CBRE

John Held

CBRE

Location

Located at 500 East 3rd Avenue, San Mateo, CA 94401, this property is part of the North Central San Mateo neighborhood and San Francisco market.

Contact Block21
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