5 Things to Consider When Building a Flood-Resilient Home in Brisbane

Brisbane’s 2022 floods were a stark reminder that many of the city’s homes were designed for an older climate — one with less rainfall intensity and fewer back-to-back weather events. If you’re building a new home, renovating, or buying in a flood-affected suburb, here are five things that should shape your approach.

1. Know Your Flood Level

Before any design decisions are made, you need to understand your site’s flood exposure. Brisbane City Council publishes flood level data through its online mapping tool — your site’s Defined Flood Event (DFE) level is the key number. Everything above it is considered habitable; everything below needs to be designed to tolerate inundation.

2. Raise What Matters

The most effective flood resilience measure is also the most straightforward: put the things you care about above flood level. This means habitable rooms, electrical switchboards, hot water systems, and HVAC equipment. Ground-level spaces — garages, laundries, storage — can be designed to flood and recover.

3. Choose the Right Materials Below Flood Level

If your lower level will be exposed to floodwater, the materials you use matter enormously. Concrete and compressed fibre cement replace timber framing. Ceramic tile replaces timber flooring. Marine-grade stainless replaces standard hardware. These choices allow a flooded space to be hosed out and dried in days rather than months.

4. Think About Water Getting In — and Out

Flood resilience is not just about keeping water out (often impossible on severely affected sites). It’s about managing water when it does get in. Drainage points at floor level, non-return valves on stormwater connections, and elevated electrical fit-offs all make a significant difference to recovery time and cost.

5. Document Everything

If your property has been flood-affected, thorough documentation — photographs, engineering reports, and architectural drawings — is essential for insurance claims, council assessments, and future sale. An architect can help you produce the documentation you need.

At Hurley Architects, we’ve worked on flood resilience upgrades across more than 40 Brisbane homes and 50 community facilities. If you’d like to talk about your property, get in touch at hello@hurleyarchitects.com.au.