There are no "tax breaks" other than the property tax deduction. However, save all your documents related to your expenses (materials and labor, cost of the land) because all those costs will reduce your taxable capital gain when you sell. Your "tax break" is that, if and when you sell, you only pay tax on the profit, not the entire cost, as long as you can prove your costs. So save proof of your costs for as long as you own the home, plus 6 years after you sell. You don't get to claim a cost for your own labor, just materials and labor you pay for.
