Considering townhouse project

[John Bixler]

Hi all, new to this site but seems to be a lot of great advice on here! I'm also new to real estate investing, but I've noticed a piece of property available that's piqued my interest and trying to figure out if what I have in mind is workable.

I'm looking at an empty lot (already zoned) which I believe would fit a nice row of 5 townhomes. Being that I don't have a background in construction or real estate, however, I'm having a hard time doing even a rough, back-of-the-envelope calculation of the numbers; I obviously know the land price and feel like I've gotten a pretty good sense of how much they could sell for based on comps in the area (I would probably sell them as condos rather than keep for income). What I don't know if how much the construction would run. For a five-unit building of three-story, roughly 1500 sq. ft townhouses, can anyone guesstimate what kind of ballpark would I be looking at? This is in the Twin Cities area.

Thanks in advance for your thoughts!