Our Services
A Platform Designed to Unlock Savings
Over 45,000 Studies Completed Since 2003

Engineering-Based Expertise
45,000+ 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 studies. 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.


Fred Clapp
Fred is a seasoned expert in cost segregation, having successfully helped hundreds of commercial real estate owners save taxes, with over $180 million in tax savings since 2011. Before joining CSSI, he played a pivotal role in building a company that became Bally’s Fitness and spent 16 years as an investment management consultant at Smith Barney. A frequent speaker at industry events, Fred is also an avid fitness enthusiast who enjoys outdoor activities along the James River Park System, tossing horseshoes, and spending quality time with his family.
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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