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21 Katherin Road Baulkham Hills NSW 2153
BASIX certificate and NatHERS rating
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This home's BASIX certificate commits it to 4 kW of solar panels and a 3,000 litre rainwater tank. It beat its BASIX energy target, scoring 74 against 72.
Key features
- Windows
- Up to aluminium frames 68.4 m², single glazing 58 m², double glazing 10.4 m²
- Wall insulation
- All external walls fibreglass batts or roll+ foil/sarking
- Roof and ceiling insulation
- Ceiling: fibreglass batts or roll; roof: foil/sarking
- Hot water
- Electric heat pump with a performance of 21 to 25 STCs or better
- Air conditioning and heating
- 1-phase airconditioning, ducted (living area and bedroom)
BASIX certificate
- Energy score
- 74 (target 72)
- Water score
- 40 (target 40)
- Thermal performance
- Pass
- Materials score
- -60
- Heating load
- 15 MJ/m² a year
- Cooling load
- 14 MJ/m² a year
- Bedrooms
- 5
- Conditioned floor area
- 339.1 m²
- Unconditioned floor area
- 12 m²
- Site area
- 809 m²
- Roof area
- 220 m²
- Garden area
- 220 m²
- Climate zone
- NatHERS climate zone 56
- Hot water
- Electric heat pump with a performance of 21 to 25 STCs or better
- Solar panels
- 4 kW
- Rainwater tank
- 3,000 litres
- Fixtures
- Showerheads 4 star, toilets 4 star, kitchen taps 5 star, basin taps 5 star
- LED lighting
- Yes
- Cooktop
- Gas
- Clothes line
- Yes
- Maximum glazing
- aluminium frames 68.4 m², single glazing 58 m², double glazing 10.4 m²
Heating
- Living area: 1-phase airconditioning - ducted; Energy rating: 4 star (average zone)
- Bedroom: 1-phase airconditioning - ducted; Energy rating: 4 star (average zone)
Cooling
- Living area: 1-phase airconditioning - ducted; Energy rating: 4 star (average zone)
- Bedroom: 1-phase airconditioning - ducted; Energy rating: 4 star (average zone)
Construction and insulation
- Floor: concrete slab on ground, conventional slab (no added insulation)
- Floor: above habitable rooms or mezzanine, particle board; frame: timber - H2 treated softwood (no added insulation)
- Floor: suspended floor above garage, particle board; frame: timber - H2 treated softwood (no added insulation)
- Garage floor: concrete slab on ground (no added insulation)
- External wall: brick veneer; frame: timber - H2 treated softwood. all external walls fibreglass batts or roll+ foil/sarking
- External garage wall: brick veneer; frame: timber - H2 treated softwood (fibreglass batts or roll+ foil/sarking)
- Internal wall: plasterboard; frame: timber - H2 treated softwood (no added insulation)
- Ceiling and roof: flat ceiling / pitched roof, framed - concrete tiles , timber - H2 treated softwood (ceiling: fibreglass batts or roll; roof: foil/sarking.)
Certificate 1822605S_04, issued 22 January 2026, from the council's DA documents.
Other certificates for this address
BASIX certificate, certificate 1822605S_03, issued 20 November 2025
BASIX certificate
- Energy score
- 74 (target 72)
- Water score
- 40 (target 40)
- Thermal performance
- Pass
- Materials score
- -60
- Heating load
- 15 MJ/m² a year
- Cooling load
- 14 MJ/m² a year
- Bedrooms
- 5
- Conditioned floor area
- 339.1 m²
- Unconditioned floor area
- 12 m²
- Site area
- 809 m²
- Roof area
- 220 m²
- Garden area
- 220 m²
- Climate zone
- NatHERS climate zone 56
- Hot water
- Gas instantaneous with a performance of 5 stars
- Solar panels
- 4 kW
- Rainwater tank
- 3,000 litres
- Fixtures
- Showerheads 4 star, toilets 4 star, kitchen taps 5 star, basin taps 5 star
- LED lighting
- Yes
- Cooktop
- Gas
- Clothes line
- Yes
- Maximum glazing
- aluminium frames 68.4 m², single glazing 58 m², double glazing 10.4 m²
Heating
- Living area: 1-phase airconditioning - ducted; Energy rating: 4 star (average zone)
- Bedroom: 1-phase airconditioning - ducted; Energy rating: 4 star (average zone)
Cooling
- Living area: 1-phase airconditioning - ducted; Energy rating: 4 star (average zone)
- Bedroom: 1-phase airconditioning - ducted; Energy rating: 4 star (average zone)
Construction and insulation
- Floor: concrete slab on ground, conventional slab (no added insulation)
- Floor: above habitable rooms or mezzanine, particle board; frame: timber - H2 treated softwood (no added insulation)
- Floor: suspended floor above garage, particle board; frame: timber - H2 treated softwood (no added insulation)
- Garage floor: concrete slab on ground (no added insulation)
- External wall: brick veneer; frame: timber - H2 treated softwood. all external walls fibreglass batts or roll+ foil/sarking
- External garage wall: brick veneer; frame: timber - H2 treated softwood (fibreglass batts or roll+ foil/sarking)
- Internal wall: plasterboard; frame: timber - H2 treated softwood (no added insulation)
- Ceiling and roof: flat ceiling / pitched roof, framed - concrete tiles , timber - H2 treated softwood (ceiling: fibreglass batts or roll; roof: foil/sarking.)
Certificate 1822605S_03, issued 20 November 2025, from the council's DA documents.
BASIX certificate, certificate 1811821S_02, issued 6 September 2025
BASIX certificate
- Energy score
- 77 (target 72)
- Water score
- 46 (target 40)
- Thermal performance
- Pass
- Materials score
- -26
- Bedrooms
- 5
- Conditioned floor area
- 253 m²
- Unconditioned floor area
- 76 m²
- Site area
- 803 m²
- Roof area
- 321 m²
- Garden area
- 180 m²
- Hot water
- Electric boosted solar with a performance of 21 to 25 STCs or better
- Solar panels
- 3 kW
- Rainwater tank
- 3,000 litres
- Fixtures
- Showerheads 4 star, toilets 4 star, kitchen taps 4 star, basin taps 4 star
- LED lighting
- Yes
- Clothes line
- Yes
Heating
- Living area: 3-phase airconditioning; Energy rating: EER 3.5 - 4.0
- Bedroom: 3-phase airconditioning; Energy rating: EER 3.5 - 4.0
Cooling
- Living area: 3-phase airconditioning; Energy rating: EER 3.5 - 4.0
- Bedroom: 3-phase airconditioning; Energy rating: EER 3.5 - 4.0
Construction and insulation
- Floor: concrete slab on ground, waffle pod slab (no added insulation)
- Floor: above habitable rooms or mezzanine, particle board; frame: timber - untreated softwood (no added insulation)
- Floor: suspended floor above garage, concrete - suspended; frame: no frame (no added insulation)
Certificate 1811821S_02, issued 6 September 2025, from the council's DA documents.
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