508.896.6601 Brewster, Cape Cod
Civil Engineering Cape Cod

" John has assembled a team based organization of professionals which I have hired for more than 30 projects over the last 3-4 years. He has the knowledge and expertise to deliver a successful project time and time again. He is very responsive to our needs as a company and I would highly recommend him and his firm."

Jim Hagerty, Vice President
REEF, Cape Cod's Home Builder


At J. M. O'Reilly & Associates, Inc., we will help you realize your vision. We know Cape Cod & the Islands – this is where we live, work and raise our families. We will help you navigate the permitting process and devise a plan to successfully complete your project while remaining sensitive to our fragile Cape Cod & Islands ecosystems. Call us today. We’ll show you how to get your project done the right way.


J. M. O’Reilly & Associates, Inc. has over 22 years of experience providing professional civil engineering services for both residential and commercial applications. Our goal is to provide a complete design package, which first and foremost takes into account the needs and wishes of the client, while also maintaining regulatory compliance and considering any potential impacts to the Cape & Islands landscape.

We pride ourselves on our relationships with our clients and with regulatory authorities. We believe that listening to and understanding the needs of our clients is key to creating a successful design project.

Sewage Disposal System Design

Engineering Services Include

  • Septic System Inspection
  • Sewage System Design
  • Wastewater Treatment Design
  • Commercial Site Design
  • Stormwater Design & Management
  • Roadway Design and Layout
  • Shore Front Protection 
  • Dock and Pier Design

Sewage Disposal System Design

On-site private sewage disposal systems serve a majority of properties on the Cape & Islands. J. M. O’Reilly & Associates, Inc. possesses extensive knowledge and experience with the Massachusetts Sanitary Regulations under Title 5, CMR 15.000. This knowledge includes an appreciation of local sanitary regulations for the towns on the Cape & Islands. Our design team treats every project as unique to our client’s needs and expectations, whether that involves consideration of existing landscaping, future changes in use, special environmental conditions or unusual site features.

Click here for BBB Business Review

J.M. O’Reilly & Associaties, Inc.

1573 Main Street Brewster, MA P.O. Box 1773 Brewster, MA
Phone: 508.896.6601
Fax: 508.896.6602
Land Surveying Cape Cod