Flood Damage Restoration Perth

Perth's Mediterranean climate delivers approximately 730 mm of annual rainfall, but the vast majority falls between May and September — creating intense seasonal flooding pressure across the metropolitan area. When months of dry weather are followed by sustained winter downpours, Perth's predominantly sandy soils become saturated quickly, leading to surface ponding, stormwater overflow, and localised flash flooding.

Properties along the Swan and Canning river corridors — including suburbs like Bassendean, Bayswater, Belmont, and South Perth — sit within designated flood zones where river levels can rise rapidly after heavy upstream rainfall in the Darling Range catchment. The northern coastal corridor from Joondalup to Wanneroo faces recurring stormwater drainage issues, with ageing infrastructure struggling to cope with intensifying rainfall events. Sandy soils throughout Perth's eastern suburbs can also cause subsidence after prolonged saturation, undermining foundations and cracking slabs.

Flood damage restoration costs in Perth vary based on the extent of flooding, water contamination category, and the materials affected. Below are indicative costs for residential properties in 2026.

• Minor flood damage (single room, clean water): $2,200–$5,000. Typical after localised stormwater ingress through doors or low-set windows during winter storms.
• Moderate flood damage (multiple rooms, grey water): $5,000–$12,000. Common when stormwater drains back up or river levels rise into subfloor areas and ground-floor living spaces.
• Severe flood damage (whole-of-home, contaminated water): $12,000–$30,000+. Required when Category 3 (black water) from sewage overflow or river floodwater inundates the property, necessitating full decontamination under IICRC S500 protocols.
• Structural flood damage (foundation/slab affected): $20,000+. Perth's sandy soils are prone to washout and subsidence after prolonged saturation, requiring underpinning or slab remediation alongside water damage restoration.

Our platform charges a $550 platform fee plus $2,200 contractor credit ($2,750 total) to begin emergency make-safe. Your assigned contractor then provides a formal contract with transparent pricing for the full scope of works. Payment plans are available through Blue Fire Finance.

Disaster Recovery connects you with NRPG's network of IICRC-certified flood damage restoration contractors across the entire Perth metropolitan area. Every contractor in the network maintains current IICRC Water Restoration Technician (WRT) certification, carries minimum $20 million public liability insurance, and includes Category 3 contaminated water specialists trained in ANSI/IICRC S500-2021 protocols.

• Lodge your claim online at disasterrecovery.com.au/claim — no phone calls, no waiting
• Instant contractor matching — matched to the nearest available contractor within your selected radius (20–100 km)
• 60-minute response — emergency make-safe begins within the hour across Perth metro
• Full claims documentation — timestamped photos, moisture readings, scope of works, and daily drying logs provided for your insurance reimbursement

We bill you directly — not your insurer. This means work begins immediately without waiting for insurer approval, scope disputes, or panel contractor availability. You control the process from day one.

Our contractor network covers every suburb across the Greater Perth region, from Joondalup in the north to Mandurah in the south, from the CBD to the Darling Range foothills.

CBD & Inner Suburbs: Perth, Northbridge, Subiaco, Mt Lawley, Leederville, West Perth, East Perth, Highgate, North Perth, Victoria Park

Northern Suburbs: Joondalup, Wanneroo, Stirling, Scarborough, Karrinyup, Balcatta, Morley, Dianella, Osborne Park, Innaloo

Southern Suburbs: Fremantle, Rockingham, Mandurah, Cockburn, Canning Vale, Willetton, Murdoch, Bull Creek, Palmyra, Melville

Eastern Suburbs: Belmont, Bayswater, Midland, Guildford, Bassendean, Maylands, Rivervale, Kalamunda, Forrestfield, High Wycombe

Flood-Prone Areas: Swan River corridor (Bassendean, Bayswater, Belmont, South Perth), Canning River corridor (Cannington, Wilson, Riverton), northern coastal drainage (Wanneroo, Joondalup), and low-lying suburbs prone to stormwater ponding

• Winter storm flash flooding: Perth's heaviest rainfall events occur between June and August, when intense low-pressure systems can dump 30–50 mm in a single hour. Ageing stormwater infrastructure in suburbs like Morley, Bayswater, and Cannington frequently overflows, sending floodwater into homes through garages, laundries, and subfloor vents.
• Swan River corridor flooding: Properties along the Swan and Canning rivers are exposed to riverine flooding when sustained rainfall in the Darling Range catchment causes rapid river level rises. Suburbs including Bassendean, Guildford, and South Perth can experience Category 2 or Category 3 water inundation requiring specialist decontamination.
• Sand subsidence after saturation: Perth's Bassendean and Spearwood sand formations are highly permeable but lose structural integrity when saturated for extended periods. Foundations, pathways, and retaining walls can shift or crack, compounding flood damage with structural remediation requirements.
• Burst reticulation mains: Perth's extensive garden reticulation systems are prone to pipe failures, particularly in older suburbs where PVC connections have degraded. A burst reticulation main can release thousands of litres before detection, saturating subfloors and undermining slab foundations — especially in the sandy soils of Perth's northern and eastern suburbs.