Unitywater Noosa Netserv Plan - Planning Assumptions (Referred from Planning & Environment Committee dated 9 July 2024 - Item 5.1) · Report

GENERAL COMMITTEE MEETING                                                              15 JULY 2024




                                   Figure 1

The DMATT model is dynamic and has been developed through an iterative process of developing
and configuring growth projections, development densities and the timing of development
assumptions, running the model and reviewing and testing the model outputs. Whilst the proposed
planning scheme amendments have been included as one input to the model, any changes following
public consultation will be fed back into the DMaTT model.

Within the DMaTT model, growth is automatically allocated to properties with the highest
development desirability index (DDI) until the aggregate of all property growth achieves set
population projections or GFA zone projections for each cohort year. For example, in early cohorts,
growth is allocated to properties with the highest DDI and in later cohorts, growth is allocated to
properties with the next highest DDI. The DDI is calculated at each projection year and is continually
variable to reflect changed conditions over time.

Growth projections

The planning assumptions and growth forecasts provide consistent projections for the planning and
delivery of infrastructure for both Unitywater and Council. The growth projections are in 5 year
increments with a base date of 2021 to 2056 and ultimate. Ultimate development is used as the
source of available growth and as a cap for projected dwellings and GFA, and projected property
growth cannot exceed ultimate. Whilst the projections include "ultimate" development and population
figures, this is very unlikely with most plans developing to no more than 75-80% of its capacity during
the life of the plan. However, for the purpose of infrastructure planning, the full capacity of
development allowed for under Noosa Plan 2020 needs to be planned for.