A case study of micro green corridors for transforming underutilized privately owned micro lots into urban green infrastructure

Underutilized privately owned micro-lots (UPMLs) represent a largely untapped resource for adaptive ecological urban transformation, yet they are often overlooked because of fragmented ownership, irregular shapes, zoning constraints, environmental exposure, and development inefficiencies. This study introduces micro green corridors (MGCs)—a landowner-centric, incentive-driven, and design-oriented framework that repositions these parcels as distributed components of urban ecological infrastructure. Unlike conventional green corridor approaches that often rely on large contiguous redevelopment sites and centralized planning, the MGCs framework focuses on decentralized, site-responsive activation strategies for constrained privately owned urban parcels within dense urban environments. The framework reinterprets nonconformity and related spatial, environmental, and operational constraints as indicators for alternative forms of resilience-oriented land activation, not only as redevelopment barriers. Within the MGCs framework, zoning analysis and buildability assessments function as diagnostic mechanisms rather than density-maximization tools, evaluating the relationship between theoretical development capacity and long-term land viability under constrained urban conditions. The framework provides practical design guidelines and assessment tools to help landowners evaluate parcel potential, navigate zoning and governance conditions, and engage constructively with local authorities. A New York City case study demonstrates how constrained and flood-prone UPMLs can be repositioned as multifunctional socio-ecological assets that support stormwater management, urban biodiversity, passive environmental cooling, productive landscapes, and neighborhood livability. The framework’s adaptability is demonstrated across diverse lot conditions, including ultra-small, irregularly shaped, nonconforming, and environmentally vulnerable parcels. The study therefore explores how resilience-oriented ecological activation can, under certain constrained urban conditions, provide stronger long-term environmental, spatial, and risk-adjusted land performance than conventional redevelopment approaches associated with disproportionate economic, spatial, and operational burdens. By emphasizing distributed, incremental transformation of fragmented privately owned land, the MGCs framework advances a scalable and replicable approach for aligning adaptive ecological land activation with broader urban resilience, sustainability, and climate adaptation objectives.