This is because lumber, rough mechanicals, site work costs don't vary much whether its entry level or higher end housing besides likely using engineered instead of dimensional lumber assuming larger homes with wider spans.More to your point about building multi-family, in Philadelphia I am finding it more and more challenging to build multi-family housing.

I challenge you to look at it all in reverse order, yes, reverse engineer it. 

I've used DIYCostSeg in addition to an engineering firm.

@Will Shoemaker While calling a civil engineering firm will be necessary at some point, I would start with the City Planner.

Anyone has recommendation of a cost-effective structural engineering company that handles residential inspections without being too expensive?

I was thinking about signing up for Bill's program he also has an Transitional Engineering program is it worth my time and money to invest in?

So as I understand I have to create a plat through an engineer and present what Im going to do if I want to build 4 homes on the property.

The City interactions, engineer, architect, will all be new to you, but the builder and architect can guide you. 

But the Zestimate doesn’t mean much unless it reflects land or finished value.Buyers will reverse-engineer their offer based on resale potential minus build and soft costs.

Your journey from engineering and oil & gas to building a MASSIVE real estate portfolio is inspiring—especially how you help others grow their wealth while scaling your own portfolio.I’m excited to be part of this community and would love to learn from your experiences in real estate investing!