In many metropolitan areas, efforts at infill and adaptive reuse of existing building stock can be hampered by modern zoning and building codes that make the regulatory and redevelopment costs too burdensome. In such cases, communities have had to adopt more parallel codes or special ordinances that provide a more flexible performance-oriented approach so that adaptive reuse can occur while still safeguarding the public health, safety and welfare. Case/Example: States of New Jersey and Maryland and the City of Wilmington, Delaware and Denver Colorado. Source/Reference: Maryland’s 2000 Infill Guidelines, http://www.mdp.state.md.us/planning/m&gs/01-22.htm