Energy-efficient home improvements [1] are usually the most deductible. Homeowners who upgrade their properties with energy-efficient heating or cooling systems [2], windows [3], doors, insulation, and other systems designed to reduce energy waste [4] may be eligible for tax credits. Those who use solar energy [5] or other alternative energy systems may also be eligible for breaks. To learn which improvements qualify, visit www.energystar.gov [6] and search “tax credits."
Links:
[1] http://www.moneypit.com/article/green-home-improvement-tips-and-advice
[2] http://www.moneypit.com/article/home-insulation-heating-and-cooling-efficiency-tips
[3] http://www.moneypit.com/article/energy-efficient-windows-do-pay
[4] http://www.moneypit.com/article/tips-save-money-your-electric-bill
[5] http://www.moneypit.com/article/solar-system-solutions-save-money-conserve-energy
[6] http://www.energystar.gov/