Melbourne’s notorious “four seasons in one day” climate presents unique challenges for homeowners, with temperature swings of up to 20°C creating energy efficiency nightmares and soaring heating bills. This comprehensive guide reveals how strategic window upgrades and sunroom extensions can slash your heating costs by up to $680 annually while significantly boosting property values. Based on real data from the Australian Building Codes Board and proven case studies, discover the smart solutions that transform Melbourne homes into year-round comfort zones, regardless of the city’s unpredictable weather patterns.