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Question DetailsAsked on 8/24/2017

looking at adding an addition and walk out basement to a crawl space. I am just wanting to know options.

We are looking to buy a house but want to make sure we can add on a walkout basement and top addition to the house that currently has 4' crawl space.

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2 Answers


Hello Brock34,

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Iann M

Answered 3 years ago by Member Services


You would need to get a firm answer before making your offer - or give yourself some investigation time as a purchase contingency, as a contingaent offer - which most sellers would not like as this is not the sort of "inspection contingency" which the inspection period is designed for.

You best and probably quickest bet would be talking to an archtect who does residentail remodel and add-on jobs in your area, to investigate building code and planning and zoning regs in your area to see, considering any well or septic or other on-site space limitations, whether it would be legal to do the add-ons, and to prepare concept design and give a conceptual ballpark cost estimate, with adequate (I would say 25% at least) contingency allowance if you are going to be making a buying decision based on this.

This conceptual design should also take in account limitations on distance from property lines and height for instance, because you might be able to do it but not on the side you visualize. I would expect this service (particularly if you agree to use the architect for the final design if the house deal closes) would be in the $1000 ballpark - maybe as little as $500-600 if he/she is intimately familiar with the particular locale from previous jobs nearby.

A Builder or General Contractor who does additions could also give you an idea - but as far as regulatory allowance and compliance and such I would not put as much weight in his opinion - and if you are looking for a conceptuyal cost and such he is probably going to want either payment or a contract for the work contingent on you closing on the house, and this would be a premature time to commit to a particular builder without plans or competitive bidding or such.


BTW - I was not clear if you meant an addition with basement, or expanding the crawlspace to full basement, then putting an addition on top of the existing house. If you meant converting the crawlspace to full basement, here are links to several previous similar questions about that - but I would say the expense is such that you would be better off looking at buying a house with full basement already if you want that.

Answered 3 years ago by LCD

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