Costs for Registration and Certification - including the third party rater fees - are about $1,000 for a 3,000 square foot home. Fees for all the above are based on a sliding scale pegged to the size of the home. It is possible that for a residence of 10,000 square feet or more, fees may approach $5,000. Construction costs may increase anywhere from zero to 5% for homes under 5,000 square feet. Note that the bottom line is impacted by finish selection to a far greater degree than by Leadership in Energy and Environmental Design for Homes Certification. The compliance pathway runs parallel to that of the normal design and construction process, so project time is not increased.