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Williams Co. Excavation works site prep, grading, and septic jobs across Cape Cod and the South Shore, running out of Sandwich. The company says it's owned and operated by Stephen Williams, his wife Carrie, and their sons — a family operation that lists foundation digging, drainage, land clearing, and hydroseeding alongside its core excavation and septic work. Reviewers keep returning to the same thing: precision. In a 2024 review, a customer whose septic installation sat on a difficult, hilly site with power lines and trees in the way described a crew that re-measured with a laser level every day to keep everything in spec. In a 2023 review, another customer who needed a hilly backyard leveled and reseeded said Steve showed up early, set realistic expectations up front, and left clear instructions for maintaining the new hydroseeded lawn. More recently, a local building-and-remodeling company that has hired them for site prep, grading, drainage, trenching, and foundation excavation on multiple projects over the years called them dependable and easy to schedule around. Across five Google reviews spanning 2023 to mid-2026, every one is five stars, and the business is listed as an earthwork and site-clearing specialist on Procore's contractor network with no complaints on file. Because the written history is thin — five reviews total — there isn't much to weigh against the praise, and nothing public flags a downside worth asking about. Anyone considering them for excavation, grading, or a Title 5 septic job on the Cape or South Shore is working from a short but consistently positive track record, worth confirming on current scheduling and site-specific details directly.
We couldn't be happier with the work this crew at Williams Co Excavation did! From start to finish, they were professional, knowledgeable, and incredibly hardworking. They completed our excavation and landscaping project with great attention to detail, making sure every grade was exactly right. They kept us informed throughout the entire process and left everything clean and organized when the job was done. We especially appreciated the suggestions they made to improve drainage and the overall layout of our yard. Their expertise truly made a difference. The result exceeded our expectations, and our property is now perfectly prepared for the next phase of our outdoor project. We highly recommend them to anyone looking for quality workmanship and outstanding customer service! If you’re looking for a dependable, experienced team that takes pride in their work, look no further! We highly recommend them and would gladly hire them again.
Williams Co. did an extraordinary job installing a new pea stone driveway and parking court for our new wildflower meadow sculptural garden at our Architectural Studio. Just wonderful and fun to work with!
We at IHS Building & Remodleing have worked with Williams Co. Excavation on multiple projects over the years, and we have had a great experience every time. They’re dependable, easy to communicate with, and show up when they say they will, which goes a long way in this industry. Whether it’s site preparation, land clearing, grading, drainage, trenching, or foundation excavation, they bring the right equipment, expertise, and attention to details. Even when unexpected site conditions come up, they handle it efficiently and keep our projects on schedule. We trust them on our projects (and with site work at our own home), and would absolutely recommend Williams Co. to anyone looking for a reliable Cape Cod based excavation company.
Absolute stellar work on my septic installation. Expert knowledge from the strength rating on their hoist chain to payload on each piece of equipment. They re-measured each day (laser level) to ensure everything was aligned and nothing out of spec. Also, my site was difficult - on a hill with steep driveway. Special care was required to work around trees, power line, etc. We had to ensure coordination with the designer and inspector for certain aspects (too much detail to list here) but they made it work. Note: communication and effort on the client side is a must to a successful project and I felt we were more brothers in arms to get the job done. Steve and Bryson are personable and they also have the connections when needing to reach other contractors (tree guy needed ASAP?....done). Grading was finished well and grass is now growing. Many thanks to C&S Williams.
Steve and his crew were top notch and highly recommended. We needed a hilly backyard leveled which included bringing in a lot of fill and loam. Steve showed up early, leveled the yard, asked questions and set expectations right from the beginning on what could be done vs. what was not feasible. The crew was very respectful of the property and where to dump the materials and mindful of overhead wires and other obstacles including shrubs. He was very knowledgeable about how we should treat our new hydroseeded lawn, and what to do for for maintanance in the next few months as the weather changes. I had heard bad things about using fill in the backyard, but the quality of materials C&S brought in was top notch. In a world where it is sometime impossible to get a contractor to even respond to a message or call, C&S was right there from my first inquiry answering questions, providing an estimate and setting a date for work that kept us on goal of having a new yard to enjoy over the summer. If I ever have another project for C&S, they will be the first we call, and the first we recommend - my neighbors are jealous! Thanks C&S!
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Added 5 new comments, added 38 new photos, established 4.4 rating
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