So I have an old house (170yrs) with only a crawlspace on the one side. I want to add an addition to that side and need to gain access to the mechanical systems. I have had a couple of tradesmen in for other work and mentioned this work coming up to them. They all say I can at least double cost of work due to crawlspace. :eek: Two have now mentioned to dig it out would probably not cost too much more. I have looked into this and it doesn't seem to daunting a task - very sandy soil and direct access to outside for a conveyor. :p My question is how far to stay away from old stone foundation and if block retaining wall would need footing?:confused:

What is the easiest method for securing a wood sole plate on to a concrete basement floor?