Most home builders do a sub par job of this. Their builders, not cleaners.  It is vital to turn a newly built/remodeled home over to the home owners that is thoroughly cleaned.  This is particularly important in luxury construction.  There is always a shortage of cleaning folks that specialize in this deep cleaning business.  Which often includes raking the grounds and picking up nails, removing floor grates vacuuming supple lines for heating system, dusting, dusting, dusting, window washing/scrapping, painters over spray.   Cleaning tile, from grouting. Wiping down new cabinetry from dirty hands installing, dusting inside cabinets, on and on.  Bid the job, then the contractor knows what it will cost.  This often turns into a long-term relationship, like another sub-contractor, that he/she can trust.

This is a low start up cost business, with plenty of opportunity.  I see it over and over in the trades and am guilty of the same.

One more.  The waste in construction is tremendous.  Roll offs are full of treasure.  Materials, particularly "cut offs" are gold for small projects, birdhouses, craft projects and art.  My income is growing from "found" materials that I am turning into art.   Most importantly, I am having fun artistically.  I am meeting a customer in a hour, I will be installing a 2K sculptural piece, made from recycled materials.  I have sold 10 pieces so far. I'm meeting with a local gallery owner later this week.  Who knew?

So much of this is just "seeing" the opportunity.

Happy hunting.