Rent increasing by 300 dollars with no improvement to living conditions

My fiancé and I are childless with a pit-boxer. Due to our dog's breed our living possibilities are limited. We've lived in the same apartment complex for more than 2 years and got a notice that our rent is increasing by 300 dollars without any additional investment or improvement into the property. It is frustrating because we so badly want to get into the housing market but we're paying close to mortgage price to stay in Bellevue. It is not sustainable.