New Construction in Cape Cod So you have the plans to build your dream home. Why not include the most economical, luxurious heating and cooling unit available on the market in your plans. Recently constructed homes come with a pride of ownership that previously-owned houses cannot rival. By installing a WaterFurnace geothermal system in your Cape Cod home, you extend that feeling to include your heating and cooling system. Adding a geothermal system in your newly built home means you can roll the cost into your monthly mortgage payment. The money you save in operating costs will most likely balance out the increase in mortgage payment - which means you may see a positive cashflow!