Wollongong Home Extensions Cost Guide: Find Licensed Builders Today
Wollongong builder guide 2026: how much home extensions, granny flats, and full renovations cost in Wollongong and the Illawarra, NSW Fair Trading licence requirements, coastal building considerations, and how to get accurate quotes for your Wollongong renovation project.
By Wollongong Daily · Published 25 July 2026, 9:41 am · written 2 July 2026
2 min read
Updated Tue, 22 Sep· 22 September 2026, 8:52 pm
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Wollongong has an active residential building industry. All residential building work over $5,000 in NSW must be performed by a NSW Fair Trading licensed builder. Wollongong's Illawarra escarpment and coastal setting, combined with strong price growth, drives demand for home extensions and granny flats as homeowners seek to maximise value without leaving their coastal lifestyle. fairtrading.nsw.gov.au
How Much Does a Home Extension Cost in Wollongong 2026?
Single-storey rear extension (30sqm, basic), typically $68,000-$120,000 in Wollongong
Single-storey rear extension (30sqm, mid-range), typically $115,000-$172,000 in Wollongong
Second-storey addition (full floor, approx 100sqm), typically $235,000-$375,000 in Wollongong
Granny flat (60sqm, complying development), typically $130,000-$202,000 in Wollongong
Kitchen renovation (mid-range), typically $23,000-$56,000 in Wollongong
Bathroom renovation (mid-range), typically $15,000-$35,000 in Wollongong
Full home renovation (3-bed home, mid-range), typically $160,000-$332,000 in Wollongong
Coastal and Escarpment Building in Wollongong
Wollongong's coastal position means some beachside properties require corrosion-resistant building materials (stainless steel fixings, marine-grade aluminium) for extensions. Escarpment-side properties in suburbs like Austinmer, Thirroul, and Bulli may have bushfire attack level (BAL) ratings affecting construction material requirements. NSW Fair Trading builder licence required. fairtrading.nsw.gov.au
Sources:
Source material used in preparing this article is listed below so readers can check the original record.
Covering community in Wollongong. Written by AI from the linked sources and not reviewed by a journalist before publishing. Sources are linked where available. Spotted an error or need a correction? Contact corrections@dailynetwork.news. Our reasonable editorial care.
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