If you have an address for the owners you can try searching for phone number there using white pages.  

You can Google them to see if you can find a phone number, if you don't mind cold calling. 

I would check with title co's to avoid endless hours on the phone with random RE attorneys.  

It's usually a phone call going over reports once a month.

Mostly phone calls and the such.  

I especially liked the phone call challenge at the end!

-mail -email -phone -all?)

Other requirements could include side walks, storm water control, street trees, street lights, and running all utilities to the lots, including electric, gas, phone, cable plus water and sewer.There could be current zoning requirements that require larger lots than those platted maybe 50-60 years ago. 

and if so "Can we get a time for us all to meet together or can we get the other/s on the phone while we discuss this?" 

I respond within thirty minutes to phone calls and emails.