With 30+ years and an extensive range of dive services, if you're looking for the experts you've come to the right place.

Bay Underwater Services NZ Ltd is New Zealand’s largest privately owned commercial diving and marine construction company. Our extensive range of specialised equipment allows us to deliver safe, efficient, and high-quality results that consistently exceed client expectations.

With a highly qualified team of commercial divers experienced across multiple disciplines, we provide complete solutions for projects of every scale — from routine inspections to complex marine construction. Explore our services below and contact us to discuss how we can assist with your next project.

Our Services

At Bay Underwater we have a range of services we can offer. Find out more below.

Marine Construction

Surveys & Inspections

Vessel & Barge Hire

Salvage

View all of our services

Commercial Diving Services With Real Advantages for Your Project

Choosing the right partner for commercial diving services can transform the outcome of your project. Bay Underwater Services NZ Ltd delivers strong value at every stage, from planning through to final reporting. Our divers work with proven systems in some of the toughest marine environments across New Zealand. When your operation demands safety, efficiency and dependable results, our team brings the knowledge and equipment that keeps your job on schedule and on budget.

Industry Expertise That Protects Your Investment

When you engage commercial diving services through a team that understands the marine environment, you reduce risk and gain confidence. Our divers are trained across multiple disciplines and understand the pressures and unique hazards of underwater construction and maintenance. This depth of experience ensures every decision supports the best possible outcome for your asset and your timeline.

Fully Equipped Marine Contractors for Work of Any Scale

We operate with specialised vessels, lifting gear and commercial dive equipment that allows us to take on routine maintenance tasks as well as large and highly technical marine construction. As trusted marine contractors, we deliver solutions across ports, wharves, offshore structures and inland waterways. You gain a crew that arrives ready to work and stays until the job is complete.

Strong Safety Systems That Deliver Certainty

Working below the water line demands absolute professionalism. Our processes are driven by strict safety standards that protect people, property and the surrounding environment. You benefit from a work programme that is planned, measured and supported by thorough documentation and transparent communication at every step.

Areas We Serve Across New Zealand

Bay Underwater Services NZ Ltd proudly supports clients across a wide service region. Our commercial diving services and marine contractor expertise are available wherever your structure, vessel or project is located. From deep water applications to shallow harbour work, our teams travel to keep critical marine infrastructure performing at its best.

Common locations we work in include: