This question is hard to give you an exact amount without knowing what area, meaning on ocean, or ocean side, on bay or bay side. What type of home meaning the more complex the shape, the more expensive the square footage would be and size would be a factor also. For instance there are new construction now for sale that is $387 low to over $1,000 a square foot on LBI. The best bet for you to get a realistic price is to make contact with a builder down here and let him give you an estimate or idea of what the cost would be for the type of home you are considering to have built. I would be more than happy to give you a list of builders that specfically build on the island if you like. Do you already have a lot in Surf City to build on? If not I would be glad to help you find one. Please feel free to contact me via e-mail - firstname.lastname@example.org or by phone 609-713-9634 for any further help I can be to you.