For the purpose of calculating previously developed site area in LEED for Neighborhood Development, lots that are fully covered with existing buildings, hardscapes, or other impervious surfaces are considered 100% previously developed. Smaller lots, such as the 0.5 acre option, are often fully developed, making them eligible to be classified as 100% previously developed under LEED ND guidelines.
References:
* LEED v4 Neighborhood Development Guide: This document specifies how to determine and calculate previously developed land for LEED certification (USGBC, LEED v4 Neighborhood Development Current Version).
* LEED Reference Guide for Neighborhood Development: Provides detailed guidance on how to categorize and calculate site areas for credits related to previously developed lands (USGBC, LEED Reference Guide for Neighborhood Development).