<p>Carbonate rocks are widely used as construction materials, but their suitability for structural and infrastructure applications depends on their petrographic and geotechnical characteristics. This study evaluates whether Limestones from local Pakistani formations can be reliably used in civil and building engineering works, including heavy structural applications. The investigation (i) characterizes the geological and engineering properties of the sampled Limestones, (ii) quantifies correlations between petrographic features and mechanical performance, and (iii) evaluates their applicability in load-bearing and large-scale construction. Petrographic analysis was carried out using optical microscopy and scanning electron microscopy (SEM), supported by energy-dispersive X-ray spectroscopy (EDS). Engineering properties were determined in accordance with relevant European and Polish standards and guidelines, and statistical and design calculations were performed using dedicated software. Physical and mechanical parameters including unconfined compressive strength, unconfined tensile strength, water absorption, specific gravity Schmidt Hammer, point load, shear strength was analyzed to evaluate their interdependence. Strong functional relationships were observed, particularly between water absorption and specific gravity. This study supports the sustainable use of locally available Limestone resources in Pakistan and provides guidance for material selection in pavements, foundations, and other structural applications. These findings have direct economic implications for building and infrastructure design and promote more efficient and rational use of regional rock resources in the construction industry.</p>