Consider a new 5500 sf custom house that had the below floor plan printed on its street side signage to show how many rooms and spaces this home offers a potential buyer.

The land cost and market history suggest a magic number of how many square feet needs to be built. The builder and his designer fills this 'magic sf' with rooms that will cost $100 to $150/sf to build, and 5 kWhr/sf/year to heat, cool, and light

Today's Buyer Wants Green Magic
Is that bigger sf and all those spaces the magic desired by today's buyers? Or is today's forward looking buyer seeking a different kind of magic - maybe 'green magic'?

If a buyer preferred a home with 40% less sf, he could save $330,000 in construction costs plus $1250 to $2500 annually in utiliites. How much 'green magic' such as super insulation, window & roofing upgrades, and solar PVs would that $330,000+ buy?