Also, if Drain-O is used and the plumber still needs to be called you must disclose that you used a highly toxic chemical.

@Justin Dar  You definitely don't want someone dumping hazardous products on your lot such as oil and any other harsh chemicals that could potentially contaminate the ground water.

My main business though is chemical manufacturing and we're looking to expand via purchasing a building.

Pool chemicals, service calls, broken furniture, dishes, etc. all add up. 

The downside to swimming pools is even at apartment buildings, almost nobody uses the pools in Los Angeles County throughout the entire year with the exception of a few times and they cost about $3000 per year to maintain with a pool cleaning company, chemicals, electricity and equipment replacement and repairs.

There are chemicals that kill the roots, but you need to be careful if you go that route.

@Stephen BrownFor starters, find local chemical distributors and call a few of them.

When (and only when) the windows are open, a chemical-like almost rubber smell starts coming from some of the interior walls.

I do see that masonry cleaning/chemical wash (the prep work) - "may require an air pollution control permit from the Environmental Permitting and Inspections Section of the CDPH"And then digging further I see there's also a separate Architectural Surface Cleaning Permit could be required.Anyone have experience with this?

We've trained our housekeeper to maintain, clean, balances & test chemicals, but there are services that do it weekly/monthly.In my personal experience, I've only rented homes on my ski trips that offered hot tubs...and Paul Sandhu can teach you how to build one!