Flood Mapping Reviews Stall as Sunshine Coast Faces Critical Development Decisions

The Sunshine Coast Council has until the end of 2026 to finalise updated flood overlay mapping across the region, a deadline that will determine development approvals, insurance premiums and evacuation planning for hundreds of thousands of residents for years to come. And the clock is running.

This is not an abstract planning exercise. The 2022 La Niña flooding caused more than $100 million in damage across southeast Queensland, with the Sunshine Coast among the hardest-hit local government areas. Suburbs along the Mooloolah River, including Bokarina and Warana, recorded inundation that caught many homeowners off guard, properties not flagged in existing overlays went underwater. The council's own post-event review acknowledged the maps were overdue for revision.

The stakes are higher now because the region's population is still climbing fast. The Sunshine Coast is projected to grow from roughly 380,000 residents today to more than 500,000 by 2041, according to Queensland Government projections. That growth is funnelling into exactly the corridors, Aura in Caloundra West, the emerging Maroochydore CBD precinct near Ocean Street, and infill suburbs around Sippy Downs, where flood risk intersects with new construction.

Where the Pressure Points Are

Residents in Bli Bli and Eudlo, two of the most consistently flood-affected communities on the coast, have been pushing the council for concrete answers since early 2025. The Eudlo Creek catchment alone covers more than 200 square kilometres and drains through residential streets that were built before modern flood modelling existed. The Sunshine Coast Local Disaster Management Group, which coordinates between the council, Queensland Fire and Emergency Services, and the State Emergency Service, held its last full public briefing in October 2025. No date has been set for the next one.

Insurance is already telling the story the maps haven't caught up to. Data from the Insurance Council of Australia shows average strata and home insurance premiums in coastal Queensland postcodes rose by 23 per cent between 2023 and 2025. In parts of Mudjimba and Marcoola, low-lying beachside suburbs north of Maroochydore, some homeowners are reporting annual building insurance quotes above $8,000, roughly double what comparable properties attract in inland suburbs just ten kilometres away.

The proposed Sunshine Coast Coastal Hazard Adaptation Strategy, which the council has been developing since 2023, is intended to map long-term responses to both riverine flooding and coastal inundation driven by sea level rise. It covers the stretch from Caloundra in the south to Coolum Beach in the north. Environmental group Coolum and North Shore Coast Care has been a consistent voice in that consultation process, pushing for hard constraints on approvals in mapped hazard zones rather than the current system of conditions-based approvals that critics say are too easily negotiated away.

What Residents Should Watch For

Three decisions in the next 18 months will matter most. The first is the council's revised flood overlay, expected in draft form by November 2026, residents whose properties fall into new high-risk categories will have a formal objection period of 30 business days. The second is the state government's review of short-term rental regulations, which has a direct bearing on flood-zone properties being listed as holiday accommodation; tighter rules could reduce the churn of occupants who don't know local evacuation routes. The third is the federal government's Disaster Ready Fund, which allocated $200 million nationally for the 2025-26 financial year, the Sunshine Coast Council submitted two mitigation infrastructure proposals under that program, and outcomes are expected by September.

For residents wanting to get ahead of the process, the council's online flood check tool at sunshinecoast.qld.gov.au is a reasonable starting point, though it reflects 2017-era modelling. Property owners in Bokarina, Bli Bli and low-lying Caloundra pockets should consider requesting a formal flood search certificate, currently $55 through the council, before the new overlays are gazetted. The price of that paperwork is modest. The cost of being caught out without it is not.