Construction does not automatically become exchange value.
Improvement exchanges are used when the desired replacement property needs work or construction before it is received by the taxpayer. The structure can involve an exchange accommodation titleholder and must be coordinated so improvements intended to count toward the exchange are completed and reflected in the property before the taxpayer receives it, subject to professional advice.
Construction contracts, draws, lender requirements, permits, title, cost overruns and the federal exchange timeline all intersect. This is not a structure to improvise after the relinquished property closes.