House Extension Cost NZ – Auckland Prices Per m² (2026)
Originally posted on House Extension Cost NZ – Auckland Prices Per m² (2026) Superior Renovations - Auckland’s Trusted Home Renovation Specialists House Extension Cost in NZ: What Auckland Homeowners Actually Pay Quick answer: A single-storey house extension in Auckland costs between $2,000 and $5,500 per square metre — so a typical 50m² ground-floor addition runs $100,000 to $275,000 depending on materials, site conditions, and whether you’re adding wet areas like kitchens or bathrooms. Auckland’s property market doesn’t leave much room for half-measures. If you’re in a three-bedroom bungalow in Grey Lynn that’s bursting at the seams, or a 1970s brick-and-tile in Mt Roskill where the kids are sharing rooms, the question isn’t whether you need more space — it’s whether extending makes more sense than moving. For most Auckland homeowners, it does. A ground-floor extension starts from around $80,000, while a second-storey addition begins at roughly $150,000 , according to our own pr...
