Exhibit 21.1

SUBSIDIARIES OF THE REGISTRANT

AS OF SEPTEMBER 30, 2004

Subsidiary	State of Incorporation or Organization
1st Group Telecommunications, Inc.	Delaware
Ace/Putzel Electric, Inc.	Georgia
Aladdin-Ward Electric & Air, Inc.	Florida
Amber Electric, Inc.	Florida
Anderson & Wood Construction Co., Inc.	Delaware
ARC Electric, Incorporated	Delaware
B. Rice Electric LP	Texas
Bachofner Electric, Inc.	Delaware
Bear Acquisition Corporation	Delaware
Bexar Electric Company, Ltd.	Texas
Bexar Electric II LLC	Arizona
Brink Electric Construction Co.	South Dakota
Britt Rice Electric, Inc.	Delaware
Britt Rice Holdings LLC	Arizona
Britt Rice Holdings II LLC	Delaware
Britt Rice Management LLC	Arizona
Bryant Electric Company, Inc.	North Carolina
BW Consolidated, Inc.	Nevada
BW/BEC, L.L.C.	Nevada
BW/BEC II LLC	Arizona
BW/BEC, Inc.	Delaware
Canova Electrical Contracting, Inc.	Delaware
Carroll Holdings LLC	Arizona
Carroll Holdings II LLC	Delaware
Carroll Management LLC	Arizona
Carroll Systems LP	Texas
Carroll Systems, Inc.	Delaware
Charles P. Bagby Co., Inc.	Alabama
Collier Electric Company, Inc.	Florida
Commercial Electrical Contractors, Inc.	Delaware
Cross State Electric, Inc.	California
Cypress Electrical Contractors, Inc.	Delaware
Daniel Electrical Contractors, Inc.	Florida
Daniel Electrical of Treasure Coast, Inc.	Florida
Daniel Integrated Technologies, Inc.	Florida
Davis Electrical Constructors, Inc.	South Carolina
Delco Electric, Inc.	Delaware
DKD Electric Company, Inc.	New Mexico
ElectroTech, Inc.	Nevada
EMC Acquisition Corporation	Delaware
Ernest P. Breaux Electrical, Inc.	Delaware

Federal Communications Group, Inc.	Delaware
Florida Industrial Electric, Inc.	Florida
General Partner, Inc.	Alabama
Goss Electric Company, Inc.	Delaware
H.R. Allen, Inc.	South Carolina
Hatfield Reynolds Electric Company	Arizona
Haymaker Electric, Inc.	Alabama
Holland Electrical Systems, Inc.	Delaware
Houston Stafford Holdings LLC	Arizona
Houston-Stafford Electric Holdings III, Inc.	Delaware
Houston-Stafford Electrical Contractors, LP	Texas
Houston-Stafford Holdings II LLC	Delaware
Houston-Stafford Management LLC	Arizona
Howard Brothers Electric Co., Inc.	Delaware
ICS Holdings LLC	Arizona
IES Communications, Inc.	Delaware
IES Contractors Holdings LLC	Arizona
IES Contractors Management LLC	Arizona
IES Contractors, Inc.	Delaware
IES ENC Management, Inc.	Delaware
IES ENC, Inc.	Delaware
IES Federal Contract Group, LP	Texas
IES Holdings II LLC	Delaware
IES Holdings LLC	Arizona
IES Management LP	Texas
IES Management ROO, LP	Texas
IES Operations Group, Inc.	Delaware
IES Properties Holdings II LLC	Arizona
IES Properties Holdings, Inc.	Delaware
IES Properties Management, Inc.	Delaware
IES Properties, Inc.	Delaware
IES Properties, LP	Texas
IES Reinsurance, Ltd.	Bermuda
IES Residential Group, Inc.	Delaware
IES Specialty Lighting, Inc.	Delaware
IES Ventures Inc.	Delaware
Integrated Electrical Finance, Inc.	Delaware
Intelligent Building Solutions, Inc.	Delaware
J.W. Gray Electric Company, Inc.	Delaware
J.W. Gray Electrical Contractors, LP	Texas
J.W. Gray Holdings II LLC	Delaware
J.W. Gray Holdings, LLC	Arizona
J.W. Gray Management, LLC	Arizona
Kayton Electric, Inc.	Nebraska
Key Electrical Supply, Inc.	Texas
Linemen, Inc. dba California Communications	Delaware
Mark Henderson, Incorporated	Delaware

Menninga Electric, Inc.	Delaware
Mid-States Electric Company, Inc.	Delaware
Mills Electric LP	Texas
Mills Electric Holdings II LLC	Delaware
Mills Electrical Contractors, Inc.	Delaware
Mills Electrical Holdings, LLC	Arizona
Mills Management LLC	Arizona
Mitchell Electric Company, Inc.	Arizona
M-S Systems, Inc.	Tennessee
Murray Electrical Contractors, Inc.	Delaware
NBH Holding Co., Inc.	Delaware
Neal Electric LP	Texas
Neal Electric Management LLC	Arizona
New Technology Electrical Contractors, Inc.	Delaware
Newcomb Electric Company, Inc.	Delaware
Pan American Electric Company, Inc.	New Mexico
Pan American Electric, Inc.	Tennessee
Paulin Electric Company, Inc.	Delaware
Pollock Electric, Inc.	Delaware
Pollock Summit Electric, LP	Texas
Pollock Summit Holdings II LLC	Delaware
Pollock Summit Holdings, Inc.	Arizona
PrimeNet, Inc.	Delaware
Primo Electric Company	Delaware
Raines Electric Co., Inc.	Delaware
Raines Electric LP	Texas
Raines Holdings II LLC	Delaware
Raines Holdings LLC	Arizona
Raines Management LLC	Arizona
Riviera Electric LLC	Delaware
RKT Electric, Inc.	Delaware
Rockwell Electric, Inc.	Delaware
Rodgers Electric Company, Inc.	Washington
Ron’s Electric, Inc., dba IES-North Plains	Delaware
SEI Electrical Contractor, Inc.	Florida
Spectrol, Inc.	Delaware
Summit Electric of Texas, Inc.	Delaware
T&H Electrical Corporation	Delaware
Tech Electric Co., Inc.	Delaware
Tesla Power (Nevada) II LLC	Delaware
Tesla Power (Nevada), Inc.	Nevada
Tesla Power & Automation, LP	Texas
Tesla Power GP, Inc.	Delaware
Tesla Power Properties, LP	Texas
Thomas Popp & Company	Ohio
Valentine Electrical, Inc.	Delaware
Wright Electrical Contracting, Inc.	Delaware