What documents do I need from my rental agent to renew my retirement visa in Thailand?

Here's Website for the Jomtien Immigration office..

As a general rule, you need to have a TM30 receipt, your lease, a copy of the landlord's thai i/d and house book for that property <- the last two are NOT asked for at every office but are asked for enough of the time that I mention them to you

SO

Seeing as there are over 80 offices in the country, I'd say swing on by your immigration office and ask them directly what they need OR post on a group related to where you live in thailand and ask