Specialized expertise in land, water and shoreline construction with a comprehensive range of services
A trusted partner in infrastructure construction
About Unwa Oy
We carry out demanding water construction projects nationwide that require specialized equipment and highly skilled personnel. Our company offers a broad range of services for infrastructure construction needs, making us the ideal partner for projects of all sizes and types. Each year, we employ a wide range of construction professionals, from designers to commercial divers.
In our operations, we place strong emphasis on exceptionally high safety standards. We take pride in serving our clients comprehensively by providing all project-related services through a single operator.
In addition to turnkey contracting, we offer ongoing maintenance and service agreements for industries such as manufacturing, ports, renewable energy, and water utilities. Below you can read more about our services.
Infrastructure construction
We operate throughout Finland as an infrastructure contractor specializing in concrete construction, earthworks and water construction, as well as diving operations. We combine decades of experience in demanding projects with versatile equipment, delivering high-quality work on schedule both above and below the surface.
Diving services
Unwa Oy provides comprehensive professional diving services nationwide. We operate throughout Finland, ensuring that every project is carried out safely and smoothly. Our work is founded on solid expertise and a strong commitment to safety.
Maintenance and service works
We provide ongoing maintenance and service works for various clients. Our customers include energy companies, cities and municipalities, as well as industrial and infrastructure operators that require regular and professional maintenance services.
Our company’s personnel have over 30 years of experience in maintenance and service work, making us a reliable and long-term service partner.
Customer Stories
Customer Testimonials
Veikka Välilehto
Site Manager, Oteran Oy“The work with Unwa Oy’s highly professional staff was carried out reliably and efficiently. Coordinating the schedules on the construction sites also went smoothly. We will certainly continue our cooperation in the future!”
Miika Mämmelä,
Ramago Oy“Working with Unwa Oy on-site has been completely seamless. The work is planned and carried out in a collaborative and positive spirit. Tasks are performed safely and with high quality, and working hours are used efficiently. Their strong work ethic is evident in everything they do!”
Samuel Ahokas
CEO, Laukaan Energia Oy“Cooperation with Unwa Oy has been extremely pleasant. The quality of work is excellent, and their performance inspires confidence. I want to build a long-term partnership with Unwa Oy!”
Harri Pouru
Maintenance Supervisor, City of Akaa“Collaboration with Unwa Oy has gone very well. The work has been completed according to the agreed schedule, and even though the project involved refurbishing an old guest marina pier, the cost estimates were very accurate.”
Aki Vanhala
Harbor Master, Jyväskylä Yacht Club (Jyväskylän Veneseura ry)“In June 2022, we carried out an inspection of mooring buoys and chains at the Juurikkasaari harbor of Jyväskylä Yacht Club. Unwa Oy performed the work with great professionalism and speed, and the inspection report was very detailed with photos and explanations. Later in the autumn, the necessary repairs were carried out, also by Unwa Oy, with the same high level of professionalism.”
Timo Pekkarinen
Site Manager, VMSV OY“Working with Unwa has been smooth. The work is efficient and professional!”
