You cannot get into the Half Hollow school district without living there! My structure is built to have 35 ft ceiling 5 bedrooms and bths with 2 suites (master and junior) junior suite can be a professional office and if you are interested would be done with house by Spring/summer 09
Ler me know
Be aware that there is alot more that you should be looking into, other then the cost per square foot of a new build. There are hidden costs, called soft costs, that need to be calculated. As land becomes unavailable in a location, your approach is correct. This is where new construction on Long Island is for most areas. The existing home, its location and applicable "zoning" regulations will dictate the applicability of what can be erected on that lot. You will then need to calculate demolition costs including the foundation and footings, new requirements for waste water management.....etc..."Got my Point."
This is exactly what I did when I purchased my home in Bellport Village. some 25 years ago. I also had the engineering and builder background to properly calculate the soft and hard costs required.
You may want to rethink your approach, but if you really do want a new home, give me a call and I can be of help!