No.  You're probably lucky you didn't get sued.  You had a contract disagreement, not a casualty or theft loss and not an investment loss.  That's not tax deductible.  

If you owned the land, and stopped construction, those costs might help you if you sold the land to someone else who wanted to start over and build something.  But here, where you have a contract to buy a finished home, failing to complete the contract is not a tax deductible loss.