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.


Troy Petrie
Troy resides in Parker, CO, with his wife and two children, having traded the ocean of his New England roots for the majestic mountains of Colorado. Passionate about traveling, his family’s adventures led them to invest in short-term rentals, where he discovered how cost segregation could significantly accelerate their portfolio growth. By partnering with CSSI, the largest cost segregation firm in America, Troy now helps other business owners and investors leverage engineered-based strategies to achieve their financial goals, aligning with CSSI’s values of integrity and excellence.
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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