Hi Paul,
So glad you asked. This is one of those rather complicated Google My Business issues, so my answer is going to be a bit long to be sure I'm being thorough. Google's guidelines have long stated the following: (https://support.google.com/business/answer/3038177?hl=en
Ineligible businesses
The following businesses aren’t eligible for a business listing:
- Rental or for-sale properties, such as vacation homes, model homes or vacant apartments. Sales or leasing offices, however, are eligible for verification.
Historically, Google has forbidden the use of GMB listings for temporary sales offices located in model homes. If you had a sales office located somewhere permanently, you could list it, but if it was temporary, it wasn't eligible.
Now, the guidelines still read this way, and you can see GMB Forum Top Contributor Joy Hawkins citing them back in 2016 in this thread in which a business model similar to yours got all of its listings suspended:
https://www.en.advertisercommunity.com/t5/Spam-Policy/Platinum-Homes-Account-Suspended-having-17-locations/m-p/739193/highlight/true#M4962
*Please note that the above thread contains references to Google Mapmaker which no longer exists.
However, a couple of months after that initial thread, Joy received some new information from Google (see: https://www.en.advertisercommunity.com/t5/Spam-Policy/Platinum-Homes-Account-Suspended-having-17-locations/m-p/825706#M5299), which I'll copy/paste here:
"I just heard back from Google because I double-checked with them. They told me:
_ We (GMB) recently decided to allow leasing offices for model homes on the Map so I'm wondering if that is what the user is saying they see often. If it's actually just empty model homes and not the leasing office, we should remove them."_
So, it seems that if you have a leasing office within a model home, Google is now okay with this (though you still should not list an empty model home).
However, moving on with your question, Paul, if the newly built communities aren't mapped yet, you will see further down in that second GMB forum thread that this represents a problem, which Joy addresses this way:
"Since Street View doesn't confirm or show any of your sales offices, the only way for me to get these all reinstated is for you to get photos of inside and outside each of them to help Google see they exist. The easiest way to do this would be to add them to your website and let me know where they are so I can reply back to Google. Let me know when you've done that."
So, what I'd recommend, then, is that you get photographic documentation together of any staffed sales offices located in a model home that isn't yet visible via Street View, and that you then post this to the Google My Business Forum, asking that a Top Contributor like Joy please help you get recognized. Hopefully this will help you avoid the problems that the poster in the Google forum ran into with suspension, but I can't guarantee it. It's confusing when Google's public guidelines don't reflect their current internal stance, and this is one they need to update publicly if they've changed their policy. At least you now have in your hands the forum threads that document what Google told Joy, in case you run into TCs or Google staff who do not understand this change of policy.
As for what to do when a sales office closes and is finally sold to a buyer, what is the model of this business? Specifically, are different communities they build branded with the same name? For example, are multiple communities named "Golden Homes", or is one called "Golden Homes" and the second called "Oceanview Homes" and the next called "Riverside Homes"? Please, let me know, as good advice on this question could depend on how the business operates.