Perth is a city of big houses. In the 2021 Census, 45.7% of occupied homes in Greater Perth had four or more bedrooms, against 34.8% across Australia, and only 7.6% were flats or apartments, against 14.2% nationally (ABS QuickStats, Greater Perth). The spread inside the city is wide: 78.2% of homes in Canning Vale have four or more bedrooms, while 63.6% of homes in Burswood are flats or apartments. A deep clean adds skirting boards, fans, sills and grout in every room, so the bedrooms and bathrooms you book decide both the price and the time.
How hard your water is depends on where it comes from. In Water Corporation's drinking water quality figures for the year to 30 June 2025, average hardness ran from 29 mg/L at Dwellingup and 50 mg/L at Mandurah to 125 mg/L at Wanneroo, 198 mg/L at Yanchep and 228 mg/L at Two Rocks (Water Corporation, Perth region aesthetic tables). Two Rocks was the only locality above the 200 mg/L level the national guidelines set to limit scale (NHMRC), and Water Corporation notes that elevated hardness is characteristic of the source supplying it. Hard water leaves spots on shower screens and glasses as it dries (Water Corporation: Hard water). On a deep clean, that is the white film on screens, taps and tiles. Film that has built up for years takes longer, and marks etched into glass may not lift completely.
Winter is when Perth bathrooms struggle. At the Bureau of Meteorology's Perth Metro station, June to August average 124 to 144 mm of rain a month and 9 am humidity of 75 to 80%, against under 16 mm of rain and 9 am humidity of 50 to 53% from December to February (BOM climate statistics, Perth Metro). WA's Housing Authority warns that condensation builds up when a home has been locked up all day and heaters run at night, and advises wiping it off walls and windows whenever it appears (Preventing dampness and mould). A deep clean deals with the surface: window tracks and sills, exhaust fans and grout. Mould that keeps returning because of a leak, broken roof tiles or blocked gutters needs that fixed first; that is not cleaning work.