A change in rules, policies, practices, or services so that a person with a disability will have an equal opportunity to use and enjoy a dwelling unit or common space. A housing provider should do everything to assist a person with a disability, but is not required to make changes that would fundamentally alter the program or create an undue financial and administrative burden. Reasonable accommodations may be necessary at all stages of the housing process, including application, tenancy, or to prevent eviction.`