Exhibit 21

List of Subsidiaries
The following sets forth the subsidiaries of the Registrant and their respective states of incorporation or organization:

Name						State
B9 Sequoia TRS LLC						Delaware
PS Business Parks, L.P.						California
B9 Sequoia C Holdco LLC						Delaware
B9 Sequoia 1 Mezz C LLC						Delaware
B9 Sequoia 3 Mezz C LLC						Delaware
B9 Sequoia 5 Mezz C LLC						Delaware
B9 Sequoia 1 Mezz B LLC						Delaware
B9 Sequoia 3 Mezz B LLC						Delaware
B9 Sequoia 5 Mezz B LLC						Delaware
B9 Sequoia 1 Mezz A LLC						Delaware
B9 Sequoia 3 Mezz A LLC						Delaware
B9 Sequoia 5 Mezz A LLC						Delaware
B9 Sequoia 1 CA GP LLC						Delaware
B9 Sequoia 3 CA GP LLC						Delaware
B9 Sequoia 1 TX Member GP LLC						Delaware
B9 Sequoia 1 TX GP LLC						Delaware
B9 Sequoia 3 TX Member GP LLC						Delaware
B9 Sequoia 3 TX GP LLC						Delaware
B9 Sequoia 5 TX Member GP LLC						Delaware
B9 Sequoia Royal Lane Owner GP LLC						Delaware
B9 Sequoia Carson Center Owner LP						Delaware
B9 Sequoia Las Plumas Owner LP						Delaware
B9 Sequoia Canada Center Owner LP						Delaware
B9 Sequoia Parkway Center Owner LP						Delaware
B9 Sequoia Santa Clara Tech Park Owner LP						Delaware
B9 Sequoia Rogers Owner LP						Delaware
B9 Sequoia Bay Center Owner LP						Delaware
B9 Sequoia Concord Owner LP						Delaware
B9 Sequoia Diablo Owner LP						Delaware
B9 Sequoia Wiegman Owner LP						Delaware
B9 Sequoia Charcot Owner LP						Delaware
B9 Sequoia Cadillac Owner LP						Delaware
B9 Sequoia Bayshore Owner LP						Delaware
B9 Sequoia Hathaway Owner LP						Delaware
B9 Sequoia Torrance Owner LP						Delaware
B9 Sequoia Monterey Owner LP						Delaware
B9 Sequoia Buena Park Owner LP						Delaware
B9 Sequoia Cerritos Industrial Owner LP						Delaware
B9 Sequoia Santa Clara Owner LP						Delaware
B9 Sequoia Signal Hill 3 Owner LP						Delaware
B9 Sequoia Christopher Owner LLC						Delaware
B9 Sequoia Ammendale LLC						Delaware

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Name						State
B9 Sequoia Parklawn Owner LLC						Delaware
B9 Sequoia Grove Owner LLC						Delaware
B9 Sequoia Bren Mar Owner LLC						Delaware
B9 Sequoia Alban Road Owner LLC						Delaware
B9 Sequoia Gude Owner LLC						Delaware
B9 Sequoia 212 Owner LLC						Delaware
B9 Sequoia Overlake Owner LLC						Delaware
B9 Sequoia 1 TX Member LP						Delaware
B9 Sequoia Mopac Owner LP						Delaware
B9 Sequoia McNeil Owner LP						Delaware
B9 Sequoia Springlake Owner LP						Delaware
B9 Sequoia Northway Plaza Owner LP						Delaware
B9 Sequoia Freeport Industrial Owner LP						Delaware
B9 Sequoia Waterford Owner LP						Delaware
B9 Sequoia Rutland Owner LP						Delaware
B9 Sequoia Freeport Business Owner LP						Delaware
B9 Sequoia Westwood Owner LP						Delaware
B9 Sequoia Arapaho Owner LP						Delaware
B9 Sequoia Valwood Owner LP						Delaware
B9 Sequoia La Prada Owner LP						Delaware
B9 Sequoia Eastgate Owner LP						Delaware
B9 Sequoia Richardson Owner LP						Delaware
B9 Sequoia The Summit Owner LP						Delaware
B9 Sequoia 3 TX Member LP						Delaware
B9 Sequoia Braker Owner LP						Delaware
B9 Sequoia Southpark Owner LP						Delaware
B9 Sequoia McKalla Owner LP						Delaware
B9 Sequoia Port America Owner LP						Delaware
B9 Sequoia Jupiter Owner LP						Delaware
B9 Sequoia Ben White Owner LP						Delaware
B9 Sequoia Lamar Owner LP						Delaware
B9 Sequoia 5 TX Member LP						Delaware
B9 Sequoia Royal Lane Owner LP						Delaware
American Office Park Properties, TPGP, Inc.						California
AOPP Acquisition Corp. Two						California
PSB Amherst Investors, LLC						Delaware
Amherst JV LLC						Delaware
Amherst Property LLC						Delaware
PSB Amherst, LLC						Delaware
PSB Amherst Finance LLC						Delaware
B9 Sequoia Freeport Business Owner LP						Delaware
Tenant Advantage, Inc.						California
PSBP QRS, Inc.						California
Hernmore Corporation						Maryland
PSBP Springing Member LLC						Delaware

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Name						State
PSBP Westwood GP, LLC						Delaware
PSB Brentford, LLC						Delaware
Brentford JV, LLC						Delaware
Brentford Property, LLC						Delaware
The Mile, LLC						Delaware
B9 Sequoia Christopher Owner LLC						Delaware
B9 Sequoia Alban Road Owner LLC						Delaware
B9 Sequoia Bren Mar Owner LLC						Delaware
REVX-098, LLC						Delaware
Arapaho Investors, LLC						Delaware
PSB Bayshore LLC						Delaware
PS Rose Canyon LLC						Delaware
PSB Shady Grove LLC						Maryland
PSB San Tomas BC, LLC						California
PSB Hathaway I & II, LLC						Delaware
PSB Walnut BP, LLC						California
PSB Northpointe D L.L.C.						Virginia
PSB Pickett IP, LLC						Virginia
PS Metro Park LLC						Maryland
PSBP Industrial, L.L.C.						Delaware
PSB MICC 2323, LLC						Delaware
PSB Wellington Commerce Park II, LLC						Delaware
PSB Wellington Commerce Park I, LLC						Delaware
PSB Wellington Commerce Park III, LLC						Delaware
PSB Boca Commerce Park LLC						Delaware
PSB Northern California Industrial Portfolio LLC						Delaware