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All development requires resources, yet mapping and investigation of in-situ resources remain underutilized in planning. Leveraging local sources of energy, water, and aggregates can significantly enhance the sustainability of development projects. Greater self-reliance in resource supply also strengthens resilience against external disruptions, while providing economic benefits. This study presents an integrated approach to sustainable area planning by combining geological resource mapping and geohazard assessment. We present an early-stage evaluation of geological resources and hazards to support the integration of geological conditions into planning, enabling effective management, sustainable use, and greater self-sufficiency in local resources. Using high-density geophysical data, borehole data, and Quaternary geological interpretations, we develop a 3D geological model to map resource potential for groundwater, shallow geothermal energy, and aggregates, while ensuring geohazard-safe development. Applied in Voss, Western Norway, our results highlight significant groundwater abstraction potential, with an extraction rate of at least 100 l/s, capable of generating large amounts of thermal energy annually, and possibly providing heating and cooling to future development. Additionally, we map high-quality sand and gravel deposits, crucial for local construction, and confirm low geohazard potential, reinforcing the suitability of the area for development. Beyond this case study, our approach provides a scalable framework for integrating geoscience into urban planning, zoning regulations, and infrastructure design. By incorporating resource mapping into municipal plans, decision-makers can reduce reliance on imported materials, lower environmental impacts, and enhance energy resilience. Despite the increasing need for geological resource assessments, such evaluations remain optional in many regulatory frameworks. Our research emphasizes the need for their inclusion in planning regulations to enhance land-use planning and promote long-term resource sustainability. • Geological mapping, geophysics, and drilling integrated in 3D models for informed geological assessment and resource estimation. • High groundwater abstraction potential supports scalable geothermal energy systems. • Resource and hazard mapping jointly inform safe, efficient, and sustainable land use. • Resource zones for integration into zoning maps to support early geology integration. • Methodology is transferable to other regions for early-stage area planning.