jyuutaku mondai : as Mike pointed out, this is the housing problems in general.
ni tsuite: about, on, concerning
kondo no doyou ni: next Saturday
kenkyuukai: conference, seminar (it should be regarded as one word rather than kankyu + kai)
ga aru: there's/there will be
It can be rephrased as
kondo no doyou ni juatku mondai ni tsuite kenkyuukai ga aru.
(There will be a seminor on the housing problems.)