Patio costs vary with size, finish and how much site preparation is involved. As a general guide, a plain concrete patio typically starts from around $65–$85 per square metre, while decorative finishes such as exposed aggregate, coloured or stamped concrete generally run from $90–$150 per square metre depending on pattern complexity and colour selection.
Other factors that move the number include site access, excavation requirements, existing ground conditions and any drainage work needed to handle storm runoff — which is not a minor consideration on a Newcastle block, given how much water an east coast low can put down in a few hours. Sealing is usually costed separately but plays a real role in protecting decorative finishes from fading and staining.
Every property differs in access, soil conditions and design requirements, so treat these figures as orientation only. A site assessment and quote gives you accurate pricing for your specific patio.