Osayleiskaava

Osayleiskaava, or partial master plan, is a municipal land-use planning instrument used in Finland to regulate land use within a defined sub-area of a municipality. It sits between the general plan (yleiskaava) and the detailed plan (asemakaava) in the planning hierarchy, providing more detailed zoning and building rights for a specified part of the municipality while remaining aligned with broader plans and guidelines.

The osayleiskaava defines how land within its area may be used and developed, including land-use designations, buildable areas, and approximate building densities. It also addresses related aspects such as housing, services, transport infrastructure, and utilities, as well as protection of nature, cultural values, and other environmental considerations. The plan is intended to guide coordinated development across the sub-area and ensure that future construction and infrastructure are compatible with regional and national planning objectives.

Typically prepared by the municipality’s planning authority, the osayleiskaava undergoes a statutory process that includes drafting, public consultation, and adoption by the municipal council. After adoption, the plan becomes binding for land-use decisions within the plan area and serves as the reference for permitting and land-use changes. Changes to an osayleiskaava require a formal amendment, and it can be supplemented or replaced by a more detailed plan (asemakaava) within the same area if necessary.

Osayleiskaava is commonly used for larger development projects, urban expansions, or areas requiring integrated planning of residential, commercial, and industrial uses, while providing more specificity than a yleiskaava but less detail than an asemakaava. It must be consistent with regional plans (maakuntakaava) and national land-use guidance.