Members of the Development & Planning Authority, including its president Deputy Neil Inder, are due to give a presentation on Wednesday 4 November at the Castel Douzaine Room.
It follows the Castel parish meeting at 7.30pm, which all parishioners can attend.
Director of planning Jim Rowles, Deputy Lee van Katwyk and Deputy Steve Williams are also expected to attend.
Campaigners have written to households in the area, saying the meeting is residents’ chance ‘to make your feelings clear’ before the States votes on the proposals on 24 November.
Independent planning inspector Keith Holland, appointed by the authority after an inquiry was set up in March, recommended against creating a local centre at Vazon. He agreed with objections, including from the Castel parish, that the area lacked the facilities to qualify and ran the risk of drainage and flooding problems.
But the DPA kept both the local centre and Whispers Vinery in its final draft of the Island Development Plan.
The vinery is one of nine sites proposed for affordable housing, and campaigners are accusing the authority of ignoring the inquiry’s conclusions.
Deputy Inder defended the decision in July, saying the inspector’s report was independent but not binding.
‘Whispers Vinery has the potential to deliver a significant amount of housing. It’s rare, if not impossible, to find a potential site that everyone is happy with, yet at the same time we are required to allocate enough land for affordable housing,’ he said at the time.
He said keeping the site ‘in play’ meant the States would have the choice to accept or remove it. The residents’ letter argues that the vinery is in excellent condition and should be kept for growing. With the island importing more than 90% of its produce, the letter says, that level of dependence ‘cannot be sustained with global warming’.
Campaigners also say a trial traffic arrangement for Castel School, introduced by the Environment & Infrastructure Committee, has added congestion in the area at certain times of day. They say it has increased the risk to pedestrians on Rue des Goddards and nearby roads, particularly schoolchildren and parents with prams.
A petition is planned, giving Vazon residents the chance to sign.