The Team


The CSSI/David Trahan team combines over 15 years of providing IRS approved cost segregation studies with over 40 years of commercial real estate experience resulting in greater benefits for its clients.

David H. Trahan

David H TrahanDavid H. Trahan currently represents Cost Segregation Services Inc (CSSI) and works with a variety of real estate owners and tax professionals by providing cost segregation and asset valuation services.  Since 2012, David’s efforts have helped his clients  defer over  an estimated $6,000,000 in income taxes.  David has spoken to numerous real estate brokerage companies, commercial mortgage companies and CPA firms on cost segregation and the 2014 Tangible Property Regulations.  Some of the organizations that David has spoken to include the Austin Chapter of CPAs and the Houston Affiliate of the American Womans Society of Certified Public Accountants.

David has authored articles regarding Cost Segregation and Real Estate Valuation that have been published in the Austin Business Journal, the Houston Business Journal and the Appraisal Journal.

Prior to joining CSSI, David Trahan provided real estate consulting and valuation services to a variety of institutional, corporate and individual clients throughout the U.S. in such areas as property tax consulting, asset disposition and acquisition, portfolio valuation, and highest and best use analyses.

Mr. Trahan has appraised and consulted on a number of major complex assignments that have included The Woodlands, a 40,000 acre development, Williams Tower (largest suburban office building in the U.S.), Houston Center, and many Central Business District office buildings.

Mr. Trahan is licensed as a Broker in the State of Texas and has previously been licensed in Texas as a Certified General Appraiser and Property Tax Consultant.

Mr. Trahan is a graduate of Louisiana State University in Baton Rouge with a Master of Business Administration and has lectured on Real Estate at The University of Texas in Austin and The University of Houston Main Campus.

Tanna Greathouse


Tanna has over twenty years of experience in office administration and project management, and is the Owner/Operator of Your Favorite Assistant, a virtual assistant firm located in Boone, NC. Tanna holds a BA in English from Appalachian State University and has always called Boone her home.

A problem-solver at heart, Tanna enjoys coordinating the many puzzle pieces related to Cost Segregation projects, and keeping the team on track.

About CSSI


Cost Segregation Services Inc (CSSI) is the premier cost segregation company in America specializing in providing IRS defined engineering-based cost segregation studies for commercial properties valued at $300,000 or greater.

CSSI was founded by industrial engineer/economist, Jim Shreve, who designed the CSSI Study based upon the Cost Segregation Audit Technique Guidelines written by the IRS after participating in the landmark case of HCA versus the IRS that established cost segregation.

Over the last 14 years, CSSI has completed over 14,000 studies and has never had a study turned down by the IRS.  All CSSI studies are performed by degreed engineers and each study includes a site inspection.

CSSI Studies have been performed for commercial property owners in every state of the U.S. Our network of professional CSSI representatives located in each state in the U.S. can demonstrate and coordinate the application of cost segregation for commercial property owners. The CSSI representative brings the personal professional attention every commercial property owner and their CPA needs to assure the proper IRS defined engineer-based cost segregation result according to the IRS tax rules.

For more information on CSSI, please go to the following:

Home Office
10343 Siegen Lane
Building 5
Baton Rouge, LA 70810



A partial list of Clients that we have been privileged to serve

Real Estate Owners

78704 Partners
Arnold & Itkin, LLP
Barvin Group
Brazelton Motors
Carson Properties
Corinthian Real Estate, Inc
Courtesy Chevrolet of Ruston
Everson Development
Fifth Corner
Finial Group
Griffin Partners
Hardhead Partners
Houston Wine Merchant
IDV Emerald Field II, LP
Ivan Smith Properties
J Beard Company
Jeff Beard
John Barzizza
Leisure Getaways
Locktite Storage
Louis Brazelton
Mark Watson
MBF Agency
McCord Development Company
Memorial Bend, LLLP
Mission Companies
Mission Grand Corners Investors, LP
Mosaic Residential
Nacogdoches Self Storage, LLC
Navisys Group
North Cypress Medical Center
Pentagon Freight Services, Inc.
Rassier Properties
Sealy & Company
SmithCo Development
Southern Star Courts
Sparrow Hawk Real Estate Strategies
Sports South Partners, LLC
Stan Biderman
Strawns Eat Shop
Stuart Dupuy
Summitt Universal LP
Superior Grill
Team Honda Baton Rouge
Texas Quail Farms
The Hills Medical Office I & II
The Leaning Pear
The Mission Companies
The Villas at West Oaks
Time 2 Dance
Todd Mason of Avison and Young & MLB Capital Partners
Tramor Properties
Valencia Group
Victory Packaging
Westmont Partners
Wild River Investments
Williamsburg Enterprises
Yellowstone Investments

Tax Professionals

Atchley & Associates, LLP
Aycock & Company
Briggs & Veselka
Calderwood Guven & C
Carpenter & Langford, PC
Chuck Rittenhouse, CPA
Don Grefe, CPA
Egly, Holcombe & Peebles, PLLC
Frierson, Solá, Simonton & Kutac, PLLC
Harper & Pearson Company, PC
Heard, McElroy & Vestal, LLC, CPAs
Ikard & Company, CPA
Jay Mezera, CPA
Mike Hogan, CPA
Moore & Botzong, CPA
Nommensen & Williams, PC
Stephen Palmerton, CPA
Vacek, Kiecke & Currier, LLP
Wendy Lewis, CPA