Hello @Roberto Rohann
I appreciate the post as I am a native Westchester County resident with my office based in Yonkers so I know the City and surrounding areas well. I work with single and multi-family Owners & investors to rehab their properties for various exit strategies. I've dealt with the existing rehab as well as the new lot new development route. I am in the preliminary stages on one in Yonkers as we speak. However, the benefit to the Owner is they already own the lot as it's adjacent to their home. So the purchase of the home included the empty lot. So they only have to factor the build cost and other soft cost.
The problem at hand with a new build is finding the land, the cost of the land, clearing/prepping the land and bringing utilities in. This all comes at a cost. You want a desirable location plus with minimal sloping/grading issues and minimal trees. This will be difficult to find for cheap.
My most recent build cost I put together for a house build on an empty lot was at $300/SF as base cost. This will vary based on foundation type and cost and ALL finishes- interior and exterior.
Also, the builder is going to need periodic payment draws as the project progresses. Not sure of your avenue with questioning, when you (or someone) has to carry the construction loan. Additionally, you will have carrying cost from the purchase of land, approval of permits and time to construct.
DM me if you are looking for the necessary due diligence services with lot(s) in mind for the build.
-Jared W. Smith, RA - Principal Architect at Architect Owl PLLC (Licensed in NY & CT)