The increase in the scale and frequency of extreme weather events predicted by current climate change projections, and significant changes in the landscape driven by urban growth, demand new solutions to improve residential building capacity to withstand natural disasters. The Building Resilience Rating Tool 5.0(BRRT5.0) is a tool created to rate the resilience of buildings and houses to hailstorms, strong winds, cyclones, flood and bushfire.

We present in this work the detailed BRRT5.0 model formulation. The resilience rating is associated to the product of the following multiplying factors:

1. the probability of a specific hazard occurring at a particular location greater than a threshold severity that would damage a given building element,
2. the percentage of damage to a building element is calculated from data provided in the Building Resilience Knowledge Database,
3. a moderating factor associated with the design (such as roof pitch) or the condition of the dwelling,
4. the cost of replacement of a given building element, and
5. the building element area percentage related to a defined standard building

The BRRT5.0 also outputs the rate of exposure to catastrophe events, the rate of material vulnerability, and a list of materials that need replacement or attention.

The tool can be applied to a single residential dwelling or multiple addresses. It can be used to create hazard profiles and identify dwellings that may require high priority mitigation or intervention in order to reduce the potential impact of a natural hazard event on a community.