Mardella is a quiet locality in Western Australia within the Serpentine-Jarrahdale local government area (postcode 6125). It is home to about 446 residents, with a settled, mature resident base and a median age of 45. Households earn a median income of $119K per year, with an average household size of 3 people. Recent annual estimates show population movement into the broader catchment, with population growth running at +4.5% year-on-year at the LGA level. WA employment has moved +1.9% year-on-year in the official ABS Labour Force trend series, which provides the broader jobs backdrop for this suburb. WA also had 24 Commonwealth-backed major projects under construction, 12 underway, and 12 in planning as at 2025-09-01, which is useful as a broader delivery backdrop rather than a suburb-specific project count. The most common occupations are managers, technicians & trades, professionals. Employment in the area leans toward construction and healthcare. The top ancestries reported are English, Australian, Dutch.
Median house prices in Mardella stand at $865,000, having grown strongly by 9.8% over the last twelve months. The median weekly rent is $380 (Census 2021). This gives a gross rental yield of approximately 2.3%. The median monthly mortgage repayment is $2,500.
From an investment perspective, The gross rental yield works out to roughly 2.3%, which reads as low yield. Property prices are near the state median ($865K/$1.0M). The price-to-income ratio of 7.3x is considered moderate. House prices have moved +9.8% year-on-year. Population growth of +4.5% year-on-year points to strong growth demand fundamentals. Building approvals have changed +0% year-on-year, indicating steady development activity.