Septic tanks and servicing

O'Hagan Contracting

Septic Tank Effluent Systems for lifestyle, rural and commercial properties not connected to sewer mains are our specialty at O’Hagan Contracting.

Reliable Septic Solutions for Your Next Build

O’Hagan Contracting is proud to be the number one installer of Oasis Clearwater septic systems nationwide. These premium systems outperform over 80% of the market, making them the smart choice for developers who want reliability, environmental performance, and long-term value.

Why Choose O’Hagan Contracting?

  • 20+ Years of Experience: We’ve installed hundreds of systems across residential and commercial sites.
  • Council-Ready Documentation: We handle septic design and all required paperwork for council consents.
  • Collaborative Design: We work directly with your team to ensure the system layout suits your site and build.
  • Commercial-Scale Capability: From subdivisions to rural developments, we deliver large-scale wastewater solutions.
  • Oasis Clearwater Support: Backed by 35 years of industry expertise, we offer full aftersales support.
  • Tough Site Specialists: Tricky terrain? No problem. We’ve got the gear and know-how to make it work.

Let’s Get Started

Whether you’re planning a new development or need a solution for a challenging site, we’re here to help.
Call us today to discuss your project and find the right Oasis system for your needs.