We do not pump systems 

Call (914) 980-3554

Residential Excavation Contractors

Septic Installation & Repairs

Servicing the Community for over 40 years.

We do not pump systems 

Call for a Free Consult

Refer a Friend — Get $100

Refer a friend for septic installation (must mention your name) and get $100 when the job is finished and paid in full.

Septic Installation & Repairs

You can rely on Leonardi & Son Construction Inc. We provide a variety of excavation, septic and construction services to our customers. It’s a family tradition for 40 years now.

With professional service and the owner on site, you get the latest technologies available in the business. You can count on our reliable service and expert work.

Our owner, Louis Leonardi, BSME raised in Cortlandt Manor, started working for his father’s construction company when he was 12. He got his degree in Mechanical Engineering from Purdue University and worked as a Propulsion Engineer for GE Aerospace until 1991 when his father retired. He took over the family business and he and his wife Amy have worked hard to build his father’s traditions.

Septic & Sewer Installation & Repairs

Septic & Sewer Installation

Complete septic tank installation services from a company you can count on.

Septic Systems and Excavating
Advanced Treatment Systems
Sewer Connections
Septic Tanks
Site Work
Curtain Drains
Bank Run
Fill/ Top Soil
Leach Fields
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Happy Clients

Ted A.
★★★★★
Great experience working with Leonardi and Son. We had our main water line break and needed to replace the entire line to our well. They were able to complete the job quickly and helped us feel comfortable and informed through the entire process. The project was completed sooner than we’d hoped! I hope to not need them again soon, but would recommend them to anyone who needs them. They went beyond our expectations!
Cory N.
★★★★★
After four years of trying to find the source of a specific issue, Lou Leonardi helped us diagnose and remedy the issue. Finally!!!!!

Lou has an engineering degree from Purdue and worked in rocket propulsion before taking over the family business. This is exactly the kind of person we needed to methodically diagnose and test the issue.

The work he did was professional, thoughtful, clean, prompt, everything you would want from a contractor, but rarely get. I highly recommend Leonardi and Son and wouldn’t use anyone else going forward.
Arash
★★★★★
I had a water main leak that was flooding my lawn, thanks to some developers going the cheap (plastic) route. Louis was extremely professional and prompt to address the matter. Him and his crew put a copper line in and pretty much exceeded expectations. Thank you Lou!
Bruce S.
★★★★★
Louis and his team did a magnificent and professional job. I needed to do sewer hook up and he made it easy for me. He is a true gentleman and extremely skilled. I strongly recommend him.
Patrick R.
★★★★★
Had my old oil tank removed and replaced with a Roth indoor double walled tank. Lou and his team did a great job in a timely manner. I would definitely recommend them to anyone requiring oil tank removal.
Austin P.
★★★★★
Lou and his team were excellent! Very knowledgeable and helpful. He replaced my septic fields at both my old house and now a new house I just moved to. I would highly recommend.
Greg V.
★★★★★
Yorktown Heights
Very reasonably priced, good work, and Lou is such a gentleman. We had our septic converted to sewer. Lou gave us the best price, was able to begin the next day, finished up in 2 days, and took good care of us. Now I'm looking to have him do some blacktopping for a bball hoop and possibly do some pavers for us! Will definitely work with him again!
Sarah W.
★★★★★
Yorktown Heights
Lou is a true professional. He replaced our collapsed curtain drains in the back yard with an improved design that has worked beautifully through our wet spring and summer. He is personally involved and does top quality work.
Tammara Hays
★★★★★
Leonardi & Son Construction did a great job removing our 25+ year old oil tank. We were thankful it was not leaking. They were very professional through the whole experience and finished the job with topsoil and seed as if they were never there digging a big hole. I highly recommend this company for your future work.

By the Numbers

Systems Installed
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Years in Business
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