I think the OP is referring to startups that are construction companies. > although the secondary works related to construction like B2B market place for const

I think the OP is referring to startups that are construction companies. > although the secondary works related to construction like B2B market place for construction materials or layout designing softwares startups are there but no startup is primary associated with real estate construction And the same answer is like for a lot of industries: "startups" (per Paul Graham) are defined as companies designed for high growth. And certain industries difficult to achieve high growth; by definition you won't see many successful startups in them.