Our Services

A Platform Designed to Unlock Savings

Over 50,000 Studies Completed Since 2003

Engineering-Based Expertise

50,000+ studies since 2003, expertly navigating complex tax regulations.

Multiple Tax Solutions

Our expertise spans cost segregation, 179D energy efficiency deduction, R&D credits, and sustainable building technologies to maximize your tax savings.  

National Coverage 

Our nationwide network of professionals provides local expertise while delivering consistent, high-quality results across all 50 states. 

Tax Professional Partnerships 

We collaborate with CPAs and tax advisors to ensure timely, compliant, and maximum tax benefits for their clients. 

CSSI is America’s leading provider of engineering-based tax solutions. We partner with property owners and their tax professionals to maximize tax benefits and increase cash flow through accurate, compliant cost segregation studies and more. Our proven methodology has never triggered an IRS audit, and our nationwide team of experts consistently delivers results that transform complex tax regulations into tangible financial benefits for our clients. 

René Nesselhauf

National Account Executive

California

René brings diverse financial expertise to CSSI, drawing from her extensive background in real estate, mortgage lending, and business finance. A University of Houston graduate, she has navigated various aspects of property transactions, from real estate sales to Texas home equity loans with AmeriQuest and traditional lending at Lending Tree. Her recent experience working with a prominent CPA firm deepened her knowledge of 1031 exchanges and tax benefits for property owners. When not helping clients optimize their tax strategies, René enjoys tennis, pickleball, and advocates for autoimmune disease awareness

Contact

Get a Free Tax Savings Analysis of Your Property

We’ll deliver a complete assessment of potential savings in as little as two business days.


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Learn more about what CSSI can do for you.

We’re committed to helping you take full advantage of cost segregation, 179D, and GreenZip technology.

Learn More About What CSSI Can Do for You

We’re committed to helping you take full advantage of Cost Segregation, 179D, R&D Tax Credits, and Green Zip technology.

Learn More