The groundwork everything else is built on
Excavation & Septic
Wasch Construction handles excavation, septic installations, site prep, and below-grade work across Calgary and the Columbia Valley. The work that happens underground matters—we bring the right equipment and the right expertise to get it done properly the first time.
Septic Installations
Reliable septic systems start with proper design, installation, and site planning. We handle septic installations for residential properties across Calgary and the Columbia Valley, coordinating excavation, tank placement, and site restoration with attention to local requirements and long-term function.
Whether you are building on a new rural lot or replacing an aging system, we focus on work that is done correctly underground so you are not revisiting problems later.
Site Grading & Clearing
Every successful build starts with proper site preparation. Our site grading and clearing services create stable, level, and build-ready ground for new construction, landscaping upgrades, and exterior projects. We handle brush removal, debris clearing, grading, leveling, and erosion-focused planning to help avoid costly issues later.
Correct grading also plays a major role in protecting your home from water damage by directing water away from foundations and finished surfaces.
Drainage Solutions
Poor drainage can lead to standing water, damaged landscaping, foundation issues, and costly repairs. We provide custom drainage solutions designed to move water away from homes, yards, and construction areas safely and effectively.
Our drainage work includes grading corrections, trench and French drains, sump-related solutions, landscape drainage improvements, and site-specific drainage planning for residential properties.
Basement Excavation
Basement excavation requires careful planning, the right equipment, and precise execution. We provide basement digging and excavation services for new home construction, basement expansions, crawl spaces, and foundation work across Calgary and the Columbia Valley.
Our team works safely, efficiently, and in line with local requirements to create clean excavation results that keep projects moving forward.
Helical Piles
A strong structure starts below ground. We provide helical pile solutions that create stable support for homes, additions, garages, and structural upgrades—especially where soil conditions or terrain require reinforcement beyond conventional footings.
We help determine the right pile solution based on soil, structure, and project scope so your build starts on solid footing.
Retaining Walls
We build retaining walls using wood, rock, and concrete block systems to manage slope, erosion, and grade changes on residential and rural properties. Our walls are planned for drainage, soil load, and the way your site is used.
Whether you need stabilization, usable yard space, or a cleaner finish on a sloped lot, we deliver walls that perform and look intentional on the landscape.
Get started
Ready to start your site work?
Septic, grading, drainage, or excavation on your property? Tell us what you need and we’ll come back with clear next steps.
No pressure. Clear pricing. Straight answers.
Now Booking 2026