Exterior architectural features visible from a public way would be reviewed. Interior changes, landscaping, maintenance and exterior features not visible from a public way are not reviewed. Other exemptions can also be included in the bylaw. The bylaw creating the district may also exclude certain categories from review; most frequently these are paint color, storm windows and doors, and window air conditioning units. The purpose of a local historic district is not to halt growth, but to allow for thoughtful consideration of change. The intent is to make changes and additions harmonious, and prevent the intrusion of incongruous elements that might detract from the aesthetic and historic values of the district. Again, historic district commissions are only allowed to review changes to exterior architectural features visible from a public way.