Sydney Builders 2026: Extension Costs, Licensed Requirements, Finding Qualified Contractors
Sydney builder guide 2026: how much home extensions, granny flats, and full renovations cost in Sydney, what to look for in a licensed builder, NSW Fair Trading licence requirements, and how to get accurate quotes for your Sydney renovation project.
By Sydney Daily · Published 25 July 2026, 9:56 am · written 2 July 2026
2 min read
Updated Thu, 27 Aug· 27 August 2026, 8:20 pm
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Sydney has one of Australia's largest residential building industries. All residential building work over $5,000 in NSW must be performed by a NSW Fair Trading licensed builder. Sydney's housing market pressure drives strong demand for home extensions, second-storey additions, granny flats, and full renovations as homeowners choose to improve rather than buy in an expensive market. fairtrading.nsw.gov.au
How Much Does a Home Extension Cost in Sydney 2026?
Single-storey rear extension (30sqm, basic), typically $78,000-$138,000 in Sydney
Single-storey rear extension (30sqm, mid-range), typically $132,000-$198,000 in Sydney
Second-storey addition (full floor, approx 100sqm), typically $265,000-$425,000 in Sydney
Granny flat (60sqm, complying development), typically $145,000-$225,000 in Sydney
Kitchen renovation (mid-range), typically $28,000-$68,000 in Sydney
Bathroom renovation (mid-range), typically $18,000-$42,000 in Sydney
Full home renovation (3-bed home, mid-range), typically $185,000-$385,000 in Sydney
Sydney Granny Flat Rules 2026
NSW's Affordable Rental Housing SEPP allows complying development granny flats on lots 450sqm and above in Sydney, subject to setback requirements. A granny flat can generate $450-$750/week rental income in Sydney, making it a strong investment. NSW Fair Trading builder licence required. planningportal.nsw.gov.au
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