If you were to sell your home on the market with Realtors involved, the buyer will likely order a home inspection, appraisal, radon test, sewer line test, and WDO test (wood destroying organism).
Here are some averages of the most costly repairs that may need addressed and repaired by the seller before closing:
Electrical – rewire the house to eliminate all knob and tube wiring: $10,000
Repipe and re-plumb – replace old copper and lead lines, damaged and stolen pipes: $10,000 for just the interior of the home
Re-roof a home: $10,000
Structural issues – carbon fiber wall strap for one wall: $5,000
Rebuild an average size retaining wall: $12,500
Replace siding: $15,000
Replace windows: $9,800
Waterproofing – stop moisture and water from draining into the home and stop it from working its way through porous foundation stone: $7,000 for one wall of a basement
These were some of the more common and most costly issues that arise when sellers go to sell their homes.