I have found a house that has undergone demo and I wanted to finish the work myself.  

If you flip one house after another of the same type, in the same area, with the same contractors, with the same finishes, just calculate the $/sqft of your last rehab and there you have it.So what about if you have 3 slabs of granite, and the other 5 slabs of granite, what about if one house, you need to replace all cabinets and the other just paint over them, what about you need to demo a fireplace on one, and the other just put stone coverings, what about if the other needs a full roof repair and the other is only a power wash?

If you have it all demoed put cement board around the tub/ shower  surround and where ever else you are putting tile. 

Having gone through the demo with one of their salesman, I will say it does look like a powerful tool and great way to get contact info, but I wonder how much better it is than delving through the records on my own.

These are full addition with permits and demo most of existing.

This usually doesn't happen here any more with banks since there is such competition here at this time (but we found extensive damage that was hidden such as the roof having three layers of roofing, the bottom which was cedar shake with ZERO sheeting at all).Pre-purchase: 2bed/1bath 800 sqft finished living space with an unfinished 720sqft basementAfter Rehab: 3bed/2bath 1520 sqft finished living spaceRehab consisted of: demo, re-wire entire house, move electrical panel and update, roof, siding, hardwoods installed, build new bath in basement, add master bedroom in basement, add washer dryer closet in basement, remove upstairs wall and add beams, remove addition in back and rebuild deck, fencing, landscaping, EVERYTHING, you get the idea.This house did take a full month longer for rehab then anticipated, but it all worked out in the end.The Bad: Budgeted 75k for rehab, ended up 88k, anticipated 60day rehab, took 90days, termites, no HVAC where we thought, Water heater was leased so it got removed after buying it (didn't know that), had to fire a contractor and have others fix his bad work, bath tubs were lain incorrectly and was not discovered until we were ready for tile...The Good: House turned out WAY better than thought, the additional time for rehab gave time for neighborhood market to increase as well, low inventory at time of listing, sold in 4 days.Numbers:  Purchase: $165k (CASH)Rehab: $88kHolding costs: roughly $2500All selling/closing/realtor/staging/misc: $35kSelling Price: $369,000 with no concessionsNet Profit roughly:  $82,556

If you have someone that will be doing any sort of prep work or demo ahead of the rehab, perhaps they could be onsite for you if needed.In other cases, I have reached out to Salvation Army - they will take clothes in decent shape and furniture as well - I have moved a lot of couches and such that way. 

@Mandi BaxterConsider this land only but also include the costs to demo the existing structure.Most likely there are significant taxes owed on the property as well, so make sure this is worth spending time on

Not sure what shape this fire place is in but for that price you can demo and build a new one. 

They do real work, lay flooring, demo, build decks, sister framing that needs it, sometimes rebuilding the framing, lots of stuff.My first CPA said, nope, do not file the w-2s for them.