Considered and well-advised civil engineering as a component of any land development or subdivision sets quality projects apart from the rest.

Civil engineering at Bonisch is about delivering what our clients expect, adding value where possible to timing, cost, or quality, and making the process a simple one. We strive to deliver the right solution for the project, whether a standard product has been installed in a standard manner, or a bespoke solution is required for a unique project where the ultimate result compliments both the project and the surrounding environment and fulfils the vision of our clients.

Design, Approvals and Project Management

We take care of the entire civil engineering design and approval process, including all consultation with territorial authorities and the management of any additional resource that maybe required. We utilise state of the art software that produces design work that can be easily distributed between project partners, including contractors that require digital files for GPS machine controlled equipment.

Once approvals are achieved, we then project manage the implementation including all site and contract management.


From the alluvial gravels of the lake areas to the challenging river sediments, the soils present are the foundation of all projects. Good geotechnical assessment, both at the beginning and throughout a project, allows appropriate designs to be progressed with accurately quantified costs. Turning the first sod of a project can either be a cause for celebration or a nasty surprise.

The volume of earthworks also has a significant bearing on project cost, particularly if material needs to be carted offsite. Our designs endeavour to be earthwork neutral, where material is kept onsite and landscaped into the project.


Good road design in both layout and vertical alignment is as important as the structural integrity of the road. Where possible our road designs complement the natural land form, take account of stormwater management, and provide logical access to the land the road services.

Road formation design is also important as it is easy to take the “if in doubt – double it” approach but each additional construction layer adds cost. Experience, along with good testing procedures ensure our road formation designs are cost effective and compliant with the relevant standards.

Foul Sewer

We can assist with capacity assessments, gravity system design, pressure systems and primary pump stations. We can also help with standalone treatment options where all foul sewerage is processed and disposed of on the development site.

The Kepler Farm subdivision was developed on the border of Lake Manapouri where any possibility of sewer effluent runoff into the lake environment was deemed totally unacceptable. To mitigate this possibility we promoted and installed a pressure sewer system from the development to the existing township reticulation – some 3.6kms away. Whilst this did add the cost of a domestic pump to the house construction budget, it was still cost comparable to a septic tank treatment option. A good outcome for all.


Our projects promote innovative and sustainable stormwater management.

Starting with a comprehensive catchment analysis, we can model how a project fits in with the bigger stormwater picture and how the proposed change in land use will impact on this catchment. This information is then analysed, along with cost/benefit, to determine a preferred option. Stormwater management is quickly becoming the most challenging part of a project with many councils requiring projects to be hydraulically neutral, meaning the post-development runoff is no greater than the pre-development runoff. Bonisch has vast experience in creating effective and land efficient attenuation and stormwater treatment solutions for projects of all sizes.


The majority of water reticulation designs relate to the additional demand created by a development on the existing water infrastructure. Many of our residential subdivisions and aged care facilities have included significant extensions from existing reticulation. An example of this is the Eyrewell Subdivision in North Canterbury required the installation of over 4.0kms of new reticulation to the development site, including a 200m stretch through the Eyre riverbed.


Bonisch does not undertake power and telecommunication reticulation designs inhouse but, as these form part of the majority of land development projects, we master plan for them within our designs to ensure an integrated services approach across the entire site. We also project manage reticulations on behalf of our clients as often the principal is responsible for all civil installation works. If requested by our clients, Bonisch offers subconsultant services with our key partners who can undertake any power and telecommunications design services to offer a one stop shop for the project.


With so much of our best design work ending up buried, landscaping through earthworks, stormwater management, street furniture and appropriate plantings ultimately becomes the signature of a project. We work closely with landscape architects and designers to ensure the nuts and bolts are covered but the project finish is well considered.

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0800 802 546 .