nickutopia (a big nickelodeon fansite) says that there will be during the summer, but that could be just a rumor. I hope it's not though. The show was very successful so there probably will be another season. I'm worried about how good it will be though. I feel like it they go any farther it'll just turn into Scooby Doo.
I really hope there will be a second season. The HOA cast said that they would love to do another season. The more people that watch the better chances we got! Since the show was originally in Europe, they are on the 2nd or 3rd season already. In the UK they just started the 1st season. Keep your fingers crossed! :)