Biophysical and Monetary Ecosystem Service Valuation in Local Planning: Bridging Economic Assessment and Spatial Governance to Prevent Soil Sealing

Soil sealing is a major driver of urban transformation, generating significant environmental impacts through the loss of soil functions and Ecosystem Services (ES). In this context, economic valuation of ES has emerged as an effective tool for communicating the importance of soil within decision-making processes largely influenced by market dynamics. Despite extensive research on ES, reviews focusing on how economic valuation can support local planning remain limited. As a consequence, this study presents a semi-systematic literature review addressing two research questions: (1) how ES assessment can be integrated into local planning tools and practices, and (2) which monetary metrics can ethically and effectively represent ES values within planning frameworks. Conducted in RStudio, the review combined automated screening of 2500 records with further manual selection and an analytical framework to examine ES definitions, valuation methods, spatial assessment units, and planning applications. The findings indicate that the rigor, methods, and level of detail of ES assessments should be adapted to planning objectives, available resources, territorial context, and stakeholders involved, supporting site-specific decisions. A cross-scale approach emerges as the most suitable for integrating ecological processes with administrative planning, while robust, flexible, and participatory governance across administrative levels is essential. Finally, despite the need for a shared methodological framework, standardized approaches such as the System of Environmental Economic Accounting–Ecosystem Accounting (SEEA EA) are still rarely adopted, particularly for local-scale and monetary ES assessments. Overall, the review provides a transparent and operational approach for integrating ES into spatial planning through interdisciplinary and participatory approaches and strengthening planning systems to prevent soil sealing and promote long-term community benefits.