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To prepare your lot/land and get ready for the foundation Cornerstone Construction of Seattle Inc. will demolish exiting homes and other structures. We will clear and clean the lot/land of all greenery and garbage.  We will then cut in your foundation. With experience supporting lagging and pile crews we can provide the service needed to get ready for forming and pouring. Contact our office for your free consultation.


When you’re looking for someone to tackle that complex under ground power installation, Cornerstone Construction of Seattle Inc. is here to help. Our team of professionals is available to provide quality solutions and options.  We work with the local public utility, we point out conflicts in design and code, and we specialize in identifying the coming obstacles that are all too often missed, creating those costly change orders and down time. Cornerstone is guaranteed to meet and exceed expectations. Contact our office today to learn more about this and our other available services.



Looking for a reliable Utility Construction Company with extensive experience for your next project? At Cornerstone Construction of Seattle Inc., we stand by the excellence of our work and provide clients with personalized attention based on their specific needs. We provide ALL onsite Sewer, Storm and Water Installation Services. This may include pump stations, detention tanks, bio-swale, bio-planter plumbing, or just simple footing drains and tie-ins to the exiting services. We have extensive experience working in the right-of-way to include but not limited too installation of sewer, storm, and water main line extensions, man holes, curb and standard catch basins. We work with the utility providers that own their taps into mains and tap those we can. We are U-certified to install fire lines to your new building as well your domestic line. We are the professionals you’re looking for to install your Underground Utilities.



At Cornerstone Construction of Seattle Inc. our clients are our number one priority and we go the extra mile to make sure they’re completely satisfied. To that end we provide video and location services along with hydro jetting.  We provide one time services as well as quarterly and annual programs to keep your home, your office building, your multitude of rental properties, or high-rise apartment complex's flowing smoothly.  Should the exiting lines require lining either by City mandate or because of the condition of the line, we at Cornerstone can install cure-in-place pipe lining that will last for years. We’re fully prepared to tackle even the most complex projects and stand by the exceptional quality of our work. Call us today and find out more about what we can do for you.

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