To minimize the impact of new construction, remodeling, and additions to existing buildings on surrounding properties in residential neighborhoods by defining an acceptable buildable area for each lot within which new development may occur. The standards are designed to protect the character of Austin's older neighborhoods by ensuring that new construction and additions are compatible in scale and bulk with existing neighborhoods.The McMansion Ordinance does not apply to every property within the City. It applies only within specific boundaries (generally, greater central Austin). The Mueller Planned Unit Development is exempt from the regulations. Properties zoned SF-4A are also exempt unless they are adjacent to properties zoned SF-2 and SF-3.