Build-to-suit is a specific kind of real estate project or development, where any real estate developer/owner agrees on developing/constructing a building for any lease/sale as per the specifications and preferences of any potential tenant/buyer, who inks the lease/sale agreement for occupying the property in question, once it gets completed.
Build-to-suit is any structure/building (usually commercial) which has been developed as per the specifications and guidelines of a tenant/buyer and there is an agreement for sale/lease signed in this case, with a view towards occupying the property with these additions.
New build-to-suit projects/developments are usually more affordable and comparatively less risky for buyers/tenants. They can get spaces built as per their own specifications and preferences, while maximizing their overall efficiency and space, along with lowering costs in the long haul. They can also have a greater say or input in the entire procedure alongside.