dmoz.org is closed - dmoztools.net is an archive (a static site, no changes are possible) made from the directory when it shut down.
There are several other directory sites online made from the old dmoz data, but none of these represent our editing community who now work on Curlie
The guidelines for suggesting a site can be found here in several languages
Real estate sites are generally (that means, as far as suggesting categories are concerned, always) listed in the geographic area containing the office locations. The location of the actual real estate is irrelevant.
This being contrary to the model which most real estate offices use, it should be said.