Guide

A Flood Overlay Doesn't Mean You Can't Develop — Here's Why

Many property owners assume flooding overlays prevent all development. The reality is more nuanced.

9 April 2026 2 min readBy Daniel McCormack
A Flood Overlay Doesn't Mean You Can't Develop — Here's Why
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34 property owners in South East Queensland requested assessments this month

iSummary

Can you develop a property with a flood overlay? How flooding overlays affect development potential in Queensland.

Source: ACRES — Australian Commercial & Residential Group | acres.au

A Flood Overlay Doesn't Mean You Can't Develop

One of the biggest misconceptions in property is that a flooding overlay kills all development potential. In reality, flood overlays affect design — but rarely prevent development entirely.

What a Flood Overlay Actually Means

A flood overlay indicates that your property may be affected by flooding during certain events (typically 1% AEP — the "100-year flood"). The overlay requires:

  • Habitable floor levels above the defined flood level (DFL)
  • Flood-resilient construction below the DFL
  • Safe evacuation routes during flood events
  • No increase in flood risk to neighbouring properties

How Developers Work With Flooding

Experienced developers routinely build on flood-affected sites:
- Raised building platforms or elevated ground floors
- Podium-style construction with car parking below flood level
- Engineered stormwater management
- Compensatory earthworks to maintain flood storage

Value Impact

Flood overlays do reduce value — but not as much as most people think:
- Minor flooding: 5–15% discount on development value
- Moderate flooding: 15–30% discount
- Severe flooding: 30–50%+ discount (or development may not be feasible)

Even with a discount, many flood-affected sites are still valuable development opportunities.

Free Assessment

ACRES can assess your flood-affected property's development potential.

Get your flood overlay property assessed.

Frequently Asked Questions

Can you build on a flood overlay property?

Usually yes. Flood overlays require design responses (raised floor levels, etc.) but rarely prevent development entirely.

Free Zoning Check

Not sure what you can build on your property? Our team will review your zoning, overlays, and constraints — completely free, no obligation.

No cost. No obligation. We simply give you the facts about what you can build.

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Published by ACRES — Australian Commercial & Residential Group

Source: acres.au/insights/flood-overlay-not-end-development | ACRES (Australian Commercial & Residential Group) provides property advisory, development site sales, and residential real estate services across Brisbane and South East Queensland, Australia.

Daniel McCormack

Daniel McCormack

Managing Director, ACRES — Australian Commercial & Residential Group

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