Brookfield is a city of neighborhoods, created under the Brookfield Concept. The "Brookfield Concept" is to establish and maintain substantial open space around structures, for generous light, air, convenience of access, safety from fire, and the enhancement of property values. Owners and occupants are encouraged to maintain their lawns, trees, shrubs, flowers, so as to achieve desired lot definition and privacy, and to avoid the division of open areas by artificial means such as the use of solid fences that result in walled-in yards.