20/6 - Twenty

451 A St., San Diego, CA 92101

Property Information

  • For Lease Contact for pricing
  • Property Type Office
  • Property Size 309,947 SF
  • # of Floors 19
  • Parking Ratio 1.10 / 1,000 SF
  • Building Class B
  • Year Built 1982
  • Date Updated May 15, 2026

Description

The 20/6 - Twenty office building is a 283,786-square-foot, 19-story property offering a professional environment with a parking ratio of 1.1. Built in 1982 and classified as a Class B building, it is well-suited for businesses seeking functionality and accessibility in a high-density urban setting. Its vertical design provides ample office space to accommodate a variety of tenant needs. The parking ratio offers convenience for tenants and visitors alike.

Situated in the Core-Columbia neighborhood of downtown San Diego, this property benefits from proximity to transportation hubs like the Civic Center, approximately 0.1 miles away, and Santa Fe Depot, just over half a mile away. Dining options such as Donut Bar and Med Cafe are within walking distance, along with a selection of nearby hotels including The US Grant and Courtyard San Diego Downtown. Civic Center Plaza Parking Garage, a convenient parking option, is located about 0.1 miles from the building. Nearby educational institutions like California Western School of Law and San Diego City College further enhance the area's vibrancy.

Highlights

  • Banking
  • Conferencing Facility
  • Controlled Access
  • Property Manager on Site
  • Security System
  • Signage

11 Spaces Available

Suite 1500

Space Type

General Office

Lease Rate

Negotiable

Total Space

14,429 SF

Floor

15

Divisible Space

14,429 - 14,429 SF

Available Date

Immediate

Lease Type

Full Service

Renewal Option

Yes

Sublease

No

Build Type

Full build out

Space Number

1500

Suite 1900

Space Type

General Office

Lease Rate

Negotiable

Total Space

14,025 SF

Floor

19

Divisible Space

14,025 - 14,025 SF

Available Date

Immediate

Lease Type

Full Service

Renewal Option

Yes

Sublease

No

Build Type

Full build out

Space Number

1900

Suite 2000

Space Type

General Office

Lease Rate

Negotiable

Total Space

15,315 SF

Floor

20

Divisible Space

15,315 - 15,315 SF

Available Date

Immediate

Lease Type

Full Service

Renewal Option

Yes

Sublease

No

Build Type

Full build out

Space Number

2000

Suite 600

Space Type

General Office

Lease Rate

Negotiable

Total Space

2,869 SF

Floor

6

Divisible Space

2,869 - 2,869 SF

Available Date

Immediate

Lease Type

Full Service

Renewal Option

Yes

Sublease

No

Build Type

Full build out

Space Number

600

Suite 610

Space Type

General Office

Lease Rate

Negotiable

Total Space

2,412 SF

Floor

6

Divisible Space

2,412 - 2,412 SF

Available Date

Immediate

Lease Type

Full Service

Renewal Option

Yes

Sublease

No

Build Type

Full build out

Space Number

610

Contacts

Derek Hulse

Cushman & Wakefield

Connor Wieck

Cushman & Wakefield

Location

Located at 451 A St., San Diego, CA 92101, this property is part of the Core - Columbia neighborhood and San Diego market.

Contact 20/6 - Twenty
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