It's not all data quality, much of it in the property business is "marketing" - don't reveal the negatives.

If the norm is three parking spaces and the listing doesn't say anything people will assume the norm and view the property. Then maybe they'll still like it when they find it only has one or two spaces whereas they would not even have viewed if the listing had said only two spaces.

I can only speak from an England and Wales perspective (Scotland may be in the UK but it has a very different house purchasing system) but you rapidly learn to read between the lines with estate agents blurb.

As for data quality at work, I will always highlight issues that I see in data that can be corrected and this is usually welcomed bythe relevant department because I can put data together in different ways that they cannot. I consider it a part of my DBA/developer role.