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18A Spencer Road Mosman NSW 2088

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BASIX certificate and NatHERS rating

Key features

Wall insulation
Or R1.70 including construction

BASIX certificate (alterations and additions)

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

LED lighting
Yes

Construction and insulation

  • Suspended floor with enclosed subfloor: framed (R0.7). R0.60 (down) (or R1.30 including construction) N/A
  • Floor above existing dwelling or building (no added insulation)
  • External wall: brick veneer R1.16 (or R1.70 including construction)
  • 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)
  • Raked ceiling, pitched/skillion roof: framed ceiling: R3.00 (up), roof: foil/sarking dark (solar absorptance > 0.70)

Certificate A1825528_03, issued 19 February 2026, from the council's DA documents.

Other certificates for this address

BASIX certificate (alterations and additions), certificate A1825528_02, issued 13 December 2025

BASIX certificate (alterations and additions)

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

LED lighting
Yes

Construction and insulation

  • Suspended floor with enclosed subfloor: framed (R0.7). R0.60 (down) (or R1.30 including construction) N/A
  • Floor above existing dwelling or building (no added insulation)
  • External wall: brick veneer R1.16 (or R1.70 including construction)
  • 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)
  • Raked ceiling, pitched/skillion roof: framed ceiling: R3.00 (up), roof: foil/sarking dark (solar absorptance > 0.70)

Certificate A1825528_02, issued 13 December 2025, from the council's DA documents.

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