Our Services

 With over 40 years of combined experience, our team specializes in commercial earthworks and excavation for small to mid-sized projects. We provide complete site preparation including grading, trenching, foundation excavation, backfill, pad prep, and material hauling. Our work supports a wide range of developments such as commercial building expansions, small-scale retail units, and multi-family residential construction.  Our skilled team has over 40 years of combined experience in commercial earthworks, excavation and demolition services for large and small projects.

Retaining walls are critical to site stability, drainage, and elevation changes—but they often fail due to poor design, inadequate base preparation, or a lack of understanding of site conditions. At KOSTR Contracting, we specialize in the construction, removal, and replacement of segmental block retaining walls for residential and commercial applications. Our team understands the structural demands and aesthetic considerations required to build walls that not only look great but are engineered to last. We take a comprehensive approach to every installation, ensuring your wall integrates properly with the surrounding site and meets long-term performance expectations.

 We offer complete septic system services tailored to acreages and rural properties. From soil assessments and engineered design, to supply, installation, and final inspection—we handle it all. We also troubleshoot existing systems, perform repairs and replacements, and provide ongoing maintenance, including pumping and cleaning services to keep your system running reliably.  Let our professional team handle the installation of your acreage septic system; from design through to final inspection.

 As Calgary adopts more advanced flood mitigation strategies, onsite stormwater management systems are becoming increasingly essential. These systems collect, treat, and disperse stormwater to protect properties and infrastructure. We support your project from system design through to installation, offering high-performance products and the latest in stormwater technology to meet municipal and site-specific requirements. Onsite stormwater management systems for flood mitigation are being introduced to Calgary infrastructure. Let us provide you with a free quote.

Our experienced team provides start-to-finish project management for both residential and commercial builds. Whether you're planning a custom single-family home, an acreage workshop, or a small commercial facility, we’ll ensure your project stays on track—on time and within budget. From permitting and design coordination to scheduling, procurement, and on-site supervision, we take care of the details so you don’t have to.   Let us guide your project; big or small, residential or commercial, our team has the knowledge and experience to make your vision a reality.