At best I would describe doing Airbnb in Los Angeles as a "Gray Area" since transient occupancy may be non-permitted for the zone you live in, but there is practically no enforcement of this code so there is little to fear if you keep your Airbnb activity under control. 

We’re not even permitted to share our password and now, for $200, a FSBO can take advantage.

And county clerks can pull up (public) information from permits that reflect what's been done recently.

Okay, numbers:Purchase Price: $47,200 cash (County Foreclosure Auction)Renovations/Holding Costs: $33,792 cashSale Price: $129,900Closing Costs: $14,378Total Profit: $34,630Renovations (Contracted):New RoofNew Windows2 New Electric Subpanels for A/CRenovations (DIY):Gutted the kitchen, opened up wall into Bedroom #1Relocated front doorFramed out closet in what was the living room to make it Master BedroomAdded a half bath to the laundry room area which became master en-suite (the home was permitted as a 1.5 bathrooms and when we got there there was only 1 bathroom so we added the half bath)Redid the kitchen entirelyCompletely redid the bathrooms, turning one into a 4-pieceNew floors throughout houseNew landscapingI estimated about $30k in repairs (after initial walk-through and having already purchased the property).

If an owner user purchases an office building with a non permitted built out second floor mezzanine, what if any recourse might they have for non disclosure against the listing  or procuring broker?

.- Parks are becoming more scarce as time goes by, mostly due to municipalities not allowing new park permits to be issued for new park construction and older parks being decommissioned for a few reasons I can't articulately recall at the moment.That is about all the solid I can do for you.

I am currently building on the coast of NC and my hard costs (including permits and fees) are estimated at $90-$100 per ft.

This is easier to see than the little gear icon next to a name.3) The ability to set an alert to notify you when a particular colleague comes on-line (either from being off-line, invisible or in "do not disturb" mode.4) Allow colleagues to be organized in groups.5) Permit multi-way chat dialogues.

This would require a permit and I would charge about $1600

Since users who never have written a post still are permitted to vote on posts they read, number of votes cast shows little other than that a user participates by reading.