PA2906-Coastal Hazard Assessment-R1 · MCU21/0212

                                         Internal use only




7           Coastal Building Line
Coastal building lines were introduced as a planning control by the former Beach Protection Authority
under the provisions of the Beach Protection Act 1968 (repealed) and have been continued through
transitional provisions in the Coastal Protection and Management Act 1995. The Coastal Building Line is
an arbitrary line placed over properties with the intention to accommodate natural erosion and accretion
processes associated with storm events (i.e., the short-term erosion component of the erosion prone
area).

Coastal Building Lines are declared under section 66 of the Coastal Protection and Management Act
1995. The Coastal Building Line at 66 Seaview Terrace is located 10 metres measured from the seaward
property boundary. It is used as a development trigger under the Planning Act 2016 for assessment of
building works within a Coastal Management District against the provisions of the State Development
Assessment Provisions (SDAP).

Performance Outcome PO6 of SDAP State Code 8 states, “In areas where a coastal building line is
present, building work is located landward of the coastal building line unless coastal protection work has
been constructed to protect the development”. The proposed building has been designed to cantilever
seaward of the coastal building line, with the foundations of the building located landward of the coastal
building line. This approach is considered to comply with this performance outcome as it achieves the
protection required for the building from the storm events considered in Section 6.1.2.

Figure 17 shows the extent of short-term erosion and dune scarp recession for an extreme storm event
consisting of a 500-year ARI storm tide level, climate change induced sea level rise and a 100-year ARI
significant wave height. The site is located outside of the zone that may be vulnerable to short-term
erosion and as such it is unlikely that the coastal building line would have been applied to the site by the
former Beach Protection Authority with the information currently available.




15 October 2021   66 SEAVIEW TERRACE, SUNSHINE BEACH                 PA2906-RHD-ZZ-XX-RP-Z-0001     29