Our Services
Precision and Strength for Every Project
Specialised Concrete Applications
Recognised as a Leading Expert in the field of Specialised Concrete Applications
- Precision foundations for the installation of large machinery and equipment.
- Reinforcing fixing and cages.
- Cutting/demolition/removal of existing concrete.
- Large bore concrete drilling.
- Concrete and sheet piling.
- High strength concrete applications.
- Large volume concrete placement.
- Expertise in the use of specialised concrete additives and grouts.
- Billet Caster Project
Installation of a new 4 strain billet caster and ladle metallurgy furnace. As head civil contractor we carried out the extensive demolition of existing concrete floors and foundations. Concrete foundations and floor slabs were then constructed and multiple large concrete support columns along with a 10m high in situ concrete billet caster.
- Industrial plant to warehouse conversion project
Over 2000m3 of concrete poured in a highly congested changing environment. Removing redundant plant and converting the space to a 6000sqm logistics warehouse.
- Architectural sea wall and boat ramp
Staged construction of a 40mpa concrete terraced seawall including all galvanised reinforcing, formwork and concrete placing. The boat ramp being 40MPa exposed aggregate concrete.
- Commercial design and build of industrial units
Bulk site excavations varied height retaining walls, Extensive concrete foundations, Architectural precast panel design and install. Including a 2000sqm yard slab.

Delivering Excellence from Start to Finish
Comprehensive Project Management Services
With a proven track record in project management, Summerville Bros Ltd offers in-house expertise in estimating, scheduling, safety planning, and site supervision. Our focus on cost, timing, and quality ensures successful project completion with transparent communication and regular progress reporting.
Summerville Bros have a strong proactive focus on health and safety and are proud of the following achievements:
- IMAPC Prequalified
- ACC Secondary accreditation.
- System Prequalified by New Zealand Steel to carry out “High Risk” category activities on their sites.
- Winner of the New Zealand Steel “Most Improved Contractor” award in 2010.
Our key site management team all hold relevant qualifications and have strong backgrounds in both practical and systems aspects of safety.
Our teams are Inducted to work on following Sites:
- New Zealand Steel Glenbrook
- Taharoa and Waikato North Head Ironsand Minisites
- BOC Gases Gas Separation Plant
- OI Glass
- Alinta Energy NZ
- Pacific Steel
- Tuakau Proteins
Crafting Exclusive Homes with Precision and Care
Exceptional Residential Construction
Summerville Bros Ltd takes pride in designing and constructing exclusive dwellings, offering comprehensive services from concept to completion. We are attuned to current trends and materials, providing innovative design ideas and meticulous attention to detail to ensure your dream home becomes a reality.
Summerville Bros have a strong proactive focus on health and safety and are proud of the following achievements:
- IMAPC Prequalified
- ACC Secondary accreditation.
- System Prequalified by New Zealand Steel to carry out “High Risk” category activities on their sites.
- Winner of the New Zealand Steel “Most Improved Contractor” award in 2010.
Our key site management team all hold relevant qualifications and have strong backgrounds in both practical and systems aspects of safety.
Our teams are Inducted to work on following Sites:
- New Zealand Steel Glenbrook
- Taharoa and Waikato North Head Ironsand Minisites
- BOC Gases Gas Separation Plant
- OI Glass
- Alinta Energy NZ
- Pacific Steel
- Tuakau Proteins
Expertise and Reliability for Complex Projects
Trusted Industrial Site Works
Preferred by several industrial clients, Summerville Bros Ltd handles a variety of industrial site works, from plant reroofing to equipment installations and building refurbishments. We are available 24/7, ensuring safety, environmental awareness, and innovative solutions for challenging industrial environments.
Summerville Bros have a strong proactive focus on health and safety and are proud of the following achievements:
- IMAPC Prequalified
- ACC Secondary accreditation.
- System Prequalified by New Zealand Steel to carry out “High Risk” category activities on their sites.
- Winner of the New Zealand Steel “Most Improved Contractor” award in 2010.
Our key site management team all hold relevant qualifications and have strong backgrounds in both practical and systems aspects of safety.
Our teams are Inducted to work on following Sites:
- New Zealand Steel Glenbrook
- Taharoa and Waikato North Head Ironsand Minisites
- BOC Gases Gas Separation Plant
- OI Glass
- Alinta Energy NZ
- Pacific Steel
- Tuakau Proteins
Building Trust with Quality and Efficiency
Reliable Partner for Government Projects
Summerville Bros Ltd successfully completes projects for local councils and government authorities, including greenfield new builds, seismic strengthening, and renovations. Our efficient communication and practical solutions ensure repeat work and strong relationships with our clients and consultants.
Summerville Bros have a strong proactive focus on health and safety and are proud of the following achievements:
- IMAPC Prequalified
- ACC Secondary accreditation.
- System Prequalified by New Zealand Steel to carry out “High Risk” category activities on their sites.
- Winner of the New Zealand Steel “Most Improved Contractor” award in 2010.
Our key site management team all hold relevant qualifications and have strong backgrounds in both practical and systems aspects of safety.
Our teams are Inducted to work on following Sites:
- New Zealand Steel Glenbrook
- Taharoa and Waikato North Head Ironsand Minisites
- BOC Gases Gas Separation Plant
- OI Glass
- Alinta Energy NZ
- Pacific Steel
- Tuakau Proteins
Delivering High-Quality Commercial Spaces
Innovative Commercial Design and Build
Summerville Bros Ltd designs and constructs high-quality commercial factory and warehouse units, leveraging strong relationships with architects and engineers. Our in-house Quantity Surveyors and dedicated management ensure projects are completed safely, on time, and within budget.
Summerville Bros have a strong proactive focus on health and safety and are proud of the following achievements:
- IMAPC Prequalified
- ACC Secondary accreditation.
- System Prequalified by New Zealand Steel to carry out “High Risk” category activities on their sites.
- Winner of the New Zealand Steel “Most Improved Contractor” award in 2010.
Our key site management team all hold relevant qualifications and have strong backgrounds in both practical and systems aspects of safety.
Our teams are Inducted to work on following Sites:
- New Zealand Steel Glenbrook
- Taharoa and Waikato North Head Ironsand Minisites
- BOC Gases Gas Separation Plant
- OI Glass
- Alinta Energy NZ
- Pacific Steel
- Tuakau Proteins


Billy Minhinnick – SBL Operator
I was employed by Blair and Peter Summy over 30+years ago. I’ve watched Clayton and Blake grow up and now they employ me. They are a supportive family and we all look out for one another. Cheers Billy.
Scott Dunstan – SBL Site Manager
As a valued member of the team, I’m constantly learning and growing in my role. I’ve been with SBL for 6 years and it’s been the best company I’ve ever worked for. We get to work on some extremely cool projects.
Cut N Drill Concrete Services – Garame Parr
The organization level from Summerville bros is second to none. They are clear communicators and know how to manage challenging worksites. We have complete multiple jobs alongside each other over the years.
Nils McGee Roofing – Nils McGee
Summerville Bros engage us on multiple roofing projects from large scale industrial to ad hoc repairs. They are proactive and always ensure safety comes first.