DIY cost segregation in its purest form would be you or you tax preparer generating a guesstimate of the short life property found in your asset. It is legal providing you do not materially overstate the amount of depreciation.
At O'Connor, we can reduce the cost of the cost segregation study materially, often by 70%, if the scope of work does not require a site visit.
Visit the website to get an estimate of the cost for a cost segregation study with or without a site visit
https://www.diycostsegregation.com/
