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As part of the Building Consent process, it is often required by the local council that a Geotechnical Report is provided for a building development. A Geotech Report is an investigation to check if the ground can support your proposed building or if any settlement, slope instability, liquefaction or other geotechnical hazards could occur. This report will also provide recommendations for the foundation design, where required.
The preparation of this report for a residential building consent typically involves:
A Stormwater Assessment is another report that your site may require for your Building Consent submission in conjunction with a Geotech report. Carried out by a civil engineer, a stormwater report is an investigation into the water disposal on your site to determine whether or not further site preparation is required, like additional drainage for example. As every site and council are different, it is best to check with your local planning company or draughtsman if this will be required.
A Topographic Site Survey forms the basis for any development on a site and provides a snap shot of what is on site at the time of survey. This includes any impediments to the development, for example significant trees, flood plains and underground services. From the Site Survey, a plan is produced to show the surveyed information, along with boundary and title information.
Boundary pegging is the process of identifying the boundaries on your section to determine where the transportable home will be placed, using pegs to mark out the house footprint. You may already have boundary pegs in place (sometimes these go missing/get buried), or can opt to measure and peg the boundaries yourself using your site survey. Although, we highly recommend employing a surveyor to do this if you are uncertain at all as accurate placement of the home or cabin is the client responsibility.
The information in the section above has been extracted from boundary.co.nz
Auckland Council - Geotechnical Report Requirements