Tenants renting houses in the Orlando region did not escape the spike with those rents rising more than 4 percent in September, which was higher than the increases of 3.5 percent nationally, according to Morningstar. Higher rents don’t seem to be scaring away tenants with vacancy rates of 4.8 percent in September, which was down slightly from a year earlier. Nationally, vacancy rates for rental houses were 5.9 percent.