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39 Lorilet 06 Landslide Hazard Overlay Code
Landslide Hazard Overlay Code
Performance outcomes Acceptable outcomes
Landslide hazard
PO1 AO1.1 In respect of landslide hazard, both lots have an
Development maintains the safety of people, Development, including associated access, is not existing residence where any risk of landslide
property and hazardous materials stored in bulk located on land identified as a landslide hazard area hazard has been addressed by structural
from the risk of landslide. on a Landslide Hazard Overlay Map; engineering and certification.
OR
AO1.2
Development, including associated access, is located
outside moderate, high and very high landslide hazard
areas and areas with 15% slope or greater, as
determined by a site-specific slope-analysis;
Editor's Note—A site- specific geotechnical
assessment may be used to demonstrate that
although the proposed development is shown on the
Landslide Hazard Overlay as being in the moderate,
high or very high landslide hazard area, the landslide
risk is low or very low.
OR
AO1.3
A site-specific geotechnical assessment is prepared by In respect of landslide hazard, both lots have an
a registered professional engineer to certify that: existing residence where any risk of landslide
hazard has been addressed by structural
engineering and certification.
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Page 2
Performance outcomes Acceptable outcomes
1. the stability of the site, including
associated buildings and infrastructure,
will be maintained and operational for
the life of the development;
2. the site is not subject to the risk of
landslide activity originating from other
land, including land above the site; and
3. development of the site will not increase
the risk of landslide activity on other
land;
Editor's Note— PSP8 Natural Hazards provides
further guidance on assessing landslide hazard.
AND
AO1.4 In respect of landslide hazard, both lots have an
Any specific measures identified in a site specific existing residence where any risk of landslide
geotechnical assessment for stabilising the site or hazard has been addressed by structural
development are to be fully implemented. engineering and certification.
Performance outcomes Acceptable outcomes
Essential community infrastructure
PO2 AO2.1 Not applicable.
Essential community infrastructure is is able to Development involving essential community
function effectively during and immediately after infrastructure is not located within a landslide hazard
landslide events. area as identified on a Landslide Hazard Overlay Map;
OR
Page 3
Performance outcomes Acceptable outcomes
AO2.2 Not applicable.
Development involving essential community
infrastructure is located in a low or very low landslide
hazard area and on land less than 15% slope, as
determined by a site-specific slope-analysis;
Editor's Note—A site-specific geotechnical
assessment may be used to demonstrate that
although the proposed development is shown on the
Landslide Hazard Overlay as being in the moderate,
high or very high landslide hazard area, the landslide
risk is low or very low.
AO2.3
A site-specific geotechnical assessment is prepared by Not applicable.
a registered professional engineer to certify that:
1. the long term stability of the site,
including associated buildings and
infrastructure, will be maintained and
operational for the life of the
development;
2. access to the site will not be impeded by
a landslide event;
3. the community infrastructure will not be
adversely affected by landslide activity
originating from other land, including
land above the site; and
4. development of the site will not increase
the risk of landslide activity on other
land.
Page 4
Performance outcomes Acceptable outcomes
Sloping sites, landscape character and scenic amenity
PO3 AO3.1 Existing buildings comply.
Development, including associated access, is Buildings present no more than two storeys at any
designed and constructed to: one point when viewed from the road or other
public space.
1. be responsive to the natural
topography and constraints imposed AO3.2 Existing buildings comply.
by the slope; Buildings and associated accesses are not
2. retain the natural landforms, constructed on land with a slope greater than 25%.
landscape character, vegetation,
including the visual amenity of hill AO3.3 No additional lots.
slopes and ridgelines; No additional lots intended to provide house sites
3. visually integrate into the streetscape are created on land with a slope of 25% or greater.
and the natural surrounds; and
4. ensure buildings and structures are AO3.4 Existing buildings comply.
not visually obtrusive, particularly Buildings are designed to follow the natural landform
from ridgelines, public open spaces, rather than modify it.
scenic routes and other critical
vantage points, outside the site. Editor's note- Designs that step down the slope
using split level construction or elevated construction
on suspended floors are a preferred alternative to
standard slab on ground construction reliant on cut
and fill of sites.
AO3.5 No filling or excavation.
The extent of filling or excavation is revegetated
immediately following completion of the works.
AO3.6 Existing buildings comply.
Any building, including any associated car parking
Page 5
Performance outcomes Acceptable outcomes
structure:-
1. has a maximum undercroft height at
the perimeter of the building of 3
metres above ground level; or
2. incorporates landscape screening for
the full height of any undercroft higher
than 3 metres above ground level at the
perimeter of the building.
Editor's note- Vertical battens are also useful to
enclose the undercroft area.
AO3.7
On sloping sites roof lines are generally parallel with Existing buildings comply.
contours of the land and roof pitch does not exceed
15 degrees.
PO4 AO4.1 Existing site development complies.
Development on sloping sites provides safe and Driveways are not steeper than 20% for more than
efficient access for vehicles and pedestrians 20 metres or one quarter of their length, whichever
is the lesser, and not steeper than 25% in any
location.
AO4.2
Vehicle turning areas are provided at the end of Existing site development complies
driveways so that it is not necessary to reverse up or
down driveways.
AO4.3
Existing site development complies.
Page 6
Performance outcomes Acceptable outcomes
Where a driveway is steeper than 20% in any part, it
is provided with a slip-resistant surface.