Any construction of, contributions to or dedications of on-site or off-site facilities, improvements, or real or personal property with off-site benefits not required to serve the new development, in excess of minimum municipal and county standards established by a previously adopted and valid ordinance or regulation and required by a municipality or county as a condition of development approval shall be credited against impact fees otherwise due from the development. The credit shall include the value of:
NMS § 5-8-15