9 Clarke Place Castle Hill NSW 2154

BASIX certificate and NatHERS rating

Finding the block on the map…

This BASIX certificate is for alterations and additions, such as an extension or a pool, rather than a whole new house.

Construction and insulation

Floor above existing dwelling or building (no added insulation)
External wall: framed (weatherboard, fibro, metal clad) R1.30 (or R1.70 including construction)
Flat ceiling, pitched roof ceiling: R3.00 (up), roof: foil/sarking medium (solar absorptance 0.475 - 0.70)

Certificate A1855708_03, issued 11 July 2026, from the council's DA documents.

BASIX certificate (alterations and additions), certificate A1832939, issued 12 February 2026

This BASIX certificate is for alterations and additions, such as an extension or a pool, rather than a whole new house.

Construction and insulation

Floor above existing dwelling or building (no added insulation)
External wall: framed (weatherboard, fibro, metal clad) R1.30 (or R1.70 including construction)
Flat ceiling, pitched roof ceiling: R3.00 (up), roof: foil/sarking medium (solar absorptance 0.475 - 0.70)

Certificate A1832939, issued 12 February 2026, from the council's DA documents.

BASIX certificate (alterations and additions), certificate A1827144, issued 16 December 2025

This BASIX certificate is for alterations and additions, such as an extension or a pool, rather than a whole new house.

Construction and insulation

Floor above existing dwelling or building (no added insulation)
External wall: framed (weatherboard, fibro, metal clad) R1.30 (or R1.70 including construction)
Raked ceiling, pitched/skillion roof: framed ceiling: R3.00 (up), roof: foil/sarking medium (solar absorptance 0.475 - 0.70)

Certificate A1827144, issued 16 December 2025, from the council's DA documents.

What else should you know about this block?