Assuming the same depth, what is the more relevant cost driver, linear feet perimeter or square footage of pool surface?
Our current design is a 100LF/600sqft free form. We are looking at alternative designs, including a rectangular/geometric design which is significantly bigger from a LF perspective (115LF) but almost identical from a sqft perspective. Our large sun shelf (9x12) is a big driver of the extra LF. Throughout the design process the tweaks we made to expand LF have cost us about $225 per LF.
Should I expect to pay the $225 per LF for the extra 15 feet or should I argue it is the same sqft? It seems sqft would more accurately drive builder costs (dig, gunite, diamond Brite). Also, should the LF associated with the shelf cost the same as LF of pool perimeter? There doesn't seem to be nearly as much builder cost for 6-9" of gunite.