Finding out number of rentals as the agent answered below is correct. Finding out who the HOA President or management company is more time consuming. What I do is go to the MLS and look for an agent with an active listing or one recently sold. There is 1 active listing on the CMLS. Now since Greenwich has it's own listing service there could be more. The agent who has that listing I referred to is Nancy Healy. Phone number is 203-698-1234 and her email is firstname.lastname@example.org. Cutting corners and saving time, I would suggest you contact her. It appears there are 300 units in the complex and assume you are asking for mortgage purposes. Always trying to work as a team with other Realtors has been my goal. So good luck if you have an interested client.
"Your Beacon to Fairfield County Lifestyles"
Candace Lipira, Realtor
Keller Williams Platinum Properties