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Septic systems, water lines and yards that need regrading are the jobs people call Legacy Excavation LLC for. The company describes itself as a Plymouth-based excavation contractor doing septic installation and repair, site preparation, utility trenching, drainage, grading and land clearing across Southeastern Massachusetts. Its website names Joseph Derochea as owner and founder. The site says the business formed in 2025 after its founder had worked in site work since age 18. A recent customer had Joe salt and plow a driveway, then finish grading the backyard and add a drainage system, and said it was all done within a day. In a recent review, Joe, the owner, was called prompt and neat. A 2026 customer said the septic system was installed and passed all inspections in less than 5 days. A 2025 customer wrote that the septic tank was replaced in two days. A 2025 customer with a leak from the town water line said Joe answered a website request the same night with a quote, started the next morning after securing approvals, and by that afternoon had diagnosed the leak and replaced a faulty valve and pipe. A 2025 customer whose farm waterline broke said Joe was there in 2 hours. A 2025 customer with rain water getting into the basement said Joe put together two estimates and had the work done soon after. A 2025 customer said Joe regraded the yard and did a retaining wall. A 2025 customer who needed trees removed, the holes filled and the yard graded for a 40x20 pool said the job came in lower than Joe first quoted.
Great experience. Joe (the owner) was prompt, neat and cares about his product and delivery. Very patient and thoughtful as we change some of the project dynamics. Communication was great! Reliable and a man of his word.. Would definitely use Legacy again.
I had Joe help me salt and plow my driveway and it was evident that he knew what he was doing by lift the snow out of the way instead of smashing it into my fence. I then had him finish grading my backyard and to add a drainage system as well. Not only was the price beyond reasonable, but his communication was beyond anything that I've experienced in the past. He showed up and did about 3 people's worth of work by himself and had it all said and done within a day when my previous landscaper took almost 3 weeks and left me in a jam that Joe solved instantly. Regardless of how fast he did the work, everything was cleaned up organized and left in away that I didn't realize someone was there. It's great to have people respect your property. The fact being he had a eye and attention to details on the highest level of professionalism is a reason to just appreciate not being oversold or under delivered and just getting what you asked for the best way possible.
This is the best company out there if you are looking to have a septic system installed on time. Joseph kept me in the loop every step of the process. System was installed and passed all inspections in less than 5 days.
Very impressed with Joe and his team. Fair price, great quality work, timely and great communication with all the moving parts. The job site was left clean each day, would absolutely recommend this company!
Replaced my septic tank in two days. Very professional, very reliable, and communicates throughout the whole process! Would def recommend
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Certified attributes are verified against the public registry. Others are the business's own statement.
2 changes recorded — last scanned Oct 1, 2026.
Rip-rap chinking3.8
One customer since 20113.4