Exhibit 21.1

SUBSIDIARIES OF PINNACLE WEST CAPITAL CORPORATION

Arizona Public Service Company

APS Foundation, Inc.

AXIOM Power Solutions, Inc.

Bixco, Inc.

Powertree Carbon Company, LLC

PWENewco, Inc.

Pinnacle West Energy Corporation (merged into Pinnacle West Capital Corporation 8/1/06)

GenWest, LLC

APACS Holdings LLC

Pinnacle West Marketing & Trading Co., LLC

APSES Holdings, Inc.

APS Energy Services Company, Inc.

Apex Power LLC

Northwind Phoenix LLC

Tucson District Energy LLC

Crest Power, LLC

SunCor Development Company

SunCor Golf, Inc.

Westworld Golf Course, L.L.C.

SunCor Homes, Inc. (formerly known as Golden Heritage Homes, Inc.)

SunCor Construction AZ, Inc. (formerly known as Golden Heritage

Construction, Inc.)

Golden Heritage Construction Nevada, LLC

SunCor Financial, LLC (formerly known as HFS Mortgage, L.L.C.)

SCM, Inc.

SunCor Realty & Management Company

Palm Valley Golf Club, Inc.

Rancho Viejo de Santa Fe, Inc.

Ranchland Utility Company

Santa Fe Water Resource Alliance, LLC

SunCor Idaho, Inc.

Avimor, LLC (formerly SunCor Idaho, LLC)

SunCor Realty & Management Idaho, LLC

Avimor Water Reclamation Company (f/k/a Foothills Sewer Company)

Type Two, Inc.

StoneRidge- Prescott Valley L.L.C.

StoneRidge Golf Course, LLC

Hayden Ferry Lakeside II, L.L.C.

Hayden Ferry Lakeside III, L.L.C.

Hayden Ferry Lakeside, L.L.C.

Lakeside Residential Communities, L.L.C.

Edgewater at Hayden Ferry Lakeside, L.L.C.

BV at Hayden Ferry Lakeside, L.L.C.

Waterford at Hayden Ferry Lakeside, L.L.C.

Club West Golf Course LLC

SunRidge Canyon, L.L.C.

Sedona Golf Resort, L.C.

Kabuto SunCor Joint Venture

Marina Heights, LLC

Palm Valley 303 Building 1, LLC

Centrepoint Associates, L.L.P.

Hidden Hills of Scottsdale, L.C.

Talavi Associates, L.L.C.

Coral Canyon Town Center, L.L.C.

Coral Canyon Town Center II, L.L.C.

Coral Canyon HD, L.L.C.

Golf de Mexico, S.A. de C.V.

Highland Water Company

Palm Valley Professional Plaza, LLC

Ranch Communities of America LLC

Riverside Distribution Center, LLC

Scottsdale Mountain Limited Partnership

SDC Prescott Valley, LLC

SDC Prescott, LLC

SDC Yavapai, LLC

StoneRidge Commercial, L.L.C.

SunCor New Mexico, Inc.

SunCor Albuquerque, LLC

SunCor Construction NM, LLC

SunCor Utah, Inc.

El Dorado Investment Company

Aegis Technologies, Inc.

Underground Imaging Technologies, LLC

AZ PB Partnership

El Dorado Ventures III

Phoenix Downtown Theater LLC

Nxt-Phase Corporation

Acoustic Locating Services, LLC

Arizona Business Accelerator

PowerOneData, Inc.

Severon Corporation