Make sure it was never moved from one homestead to another from the vendor/builder only. 

In my market, which is a fairly economical place to build, I am friends with full time builders that are in their properties about $150k/door for construction level finishes.  

Please see the rough numbers below :Tear down house price 350k,Construction cost 165 sqft * 2 build=627k too much for the land unless your exit is 3 million. don't reinvent the wheel. no single family home builder is paying 300k for land. that's miami florida prices where I live. we buy land 50k and under in Columbus Ohio. keep land at less than 10% of after built value.

Typically, the adjustments I see on appraisals for basements are more flat rate adjustments. 10k is usually the number I've seen.What stinks is that there are a couple of model types that have below grade space where the builder, I'm sure, was trying to lower the taxes by having it below grade so the county wouldn't count that space in the assessment.

The options are, demo the lot, split the lot and then sell 2 lots to the builder or build myself.

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Although I know most sec 8 landlords use it because of the perception of guaranteed rents.As a small home builder I really dont know how they are going to lower the cost of new construction housing unless the govmit subsidizes it somehow.. basically the price of home components are very sticky they only go up. with the xception of lumber that will go  up and down through out the year..

My first impression is that your numbers in the current economic climate seem a little rosy.I also have friends that are builders and I try to stay in touch with them on costs as we mostly do "to the studs" renovations when we buy a place. 

Im currently networking to partner up with a home builder here in Staten Island and build Semis on empty land.

We're working with a new construction builder who has an in-house lender (Austin, Texas area).