openspace

Open space, or openspace, refers to areas that are not built upon or are kept free of fixed structures, designed for public use, recreation, or ecological value in urban and landscape contexts. In urban planning, open spaces include parks, plazas, greenways, wetlands, waterfronts, and nature reserves that are accessible to residents. They serve multiple functions: recreation and social interaction; environmental services such as stormwater management, air and heat mitigation, and biodiversity; and aesthetic and cultural value within the urban fabric. Design and management emphasize accessibility, safety, maintenance, and inclusivity, with placement guided by principles of walkability, connectivity, and resilience to climate factors.

In architecture and interior design, the term open space can describe areas with few partitions or flexible layouts, such as open-plan offices or modular interiors, where space can be reconfigured for different activities.

Open Space Technology is a distinct facilitation method for meetings and conferences. Developed by Harrison Owen in the 1980s, OST centers on participants creating the agenda and choosing topics, governed by the "law of two feet" which invites attendees to move to discussions that are most meaningful to them. OST aims to produce practical outcomes and fosters participation, collaboration, and emergent solutions, and has been applied in business, education, government, and civic groups.

Governance, funding, and stewardship vary by jurisdiction and purpose, with open spaces often owned or managed by municipalities, parks departments, or nonprofit organizations. Evaluation typically considers usage, user experience, social impact, and ecological outcomes.