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Home report
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4 Mitchell Road Callala Bay NSW 2540
BASIX certificate and NatHERS rating
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This home has a NatHERS rating of 7 stars out of 10. Its BASIX certificate commits it to a 2,200 litre rainwater tank. Its NatHERS certificate lists insulation in the external walls, ceiling and floor. It beat its BASIX water target, scoring 48 against 40.
Key features
- Windows
- 18 windows and glazed doors: Timber A SG Clear; Aluminium Awning Window SG 3Clr; Aluminium French Door SG 4Clr and 9 more types
- Wall insulation
- R2.7
- Roof and ceiling insulation
- Ceiling R4, R6, roof Corrugated Iron Timber Frame Bulk, Reflective Side Down, No Air Gap Above R1.3, medium colour
- Hot water
- Electric heat pump with a performance of 26 to 30 STCs or better
- Air conditioning and heating
- 1-phase airconditioning, ducted (living area and bedroom)
Built by Hotondo Southcoast.
BASIX certificate
- Energy score
- 69 (target 69)
- Water score
- 48 (target 40)
- Thermal performance
- Pass
- Materials score
- -21
- Heating load
- 42 MJ/m² a year
- Cooling load
- 19 MJ/m² a year
- Bedrooms
- 4
- Conditioned floor area
- 156 m²
- Unconditioned floor area
- 10 m²
- Site area
- 421 m²
- Roof area
- 180 m²
- Garden area
- 172 m²
- Climate zone
- NatHERS climate zone 18
- Hot water
- Electric heat pump with a performance of 26 to 30 STCs or better
- Rainwater tank
- 2,200 litres
- Fixtures
- Showerheads 3 star, toilets 4 star, kitchen taps 4 star, basin taps 4 star
- LED lighting
- Yes
- Clothes line
- Yes
- Maximum glazing
- aluminium frames 36.4 m², single glazing 10.4 m², double glazing 26 m²
Heating
- Living area: 1-phase airconditioning - ducted; Energy rating: EER 3.5 - 4.0
- Bedroom: 1-phase airconditioning - ducted; Energy rating: EER 3.5 - 4.0
Cooling
- Living area: 1-phase airconditioning - ducted; Energy rating: EER 3.5 - 4.0
- Bedroom: 1-phase airconditioning - ducted; Energy rating: EER 3.5 - 4.0
Construction and insulation
- Floor: concrete slab on ground, waffle pod slab (no added insulation)
- Floor: suspended floor above open subfloor, AAC panel (75 mm); frame: timber - H2 treated softwood (fibreglass batts or roll)
- Floor: above habitable rooms or mezzanine, AAC panel (75 mm); frame: timber - H2 treated softwood (fibreglass batts or roll)
- Floor: suspended floor above garage, AAC panel (75 mm); frame: timber - H2 treated softwood (fibreglass batts or roll)
- Garage floor: concrete slab on ground, waffle pod slab (no added insulation)
- External wall: brick veneer; frame: timber - H2 treated softwood (fibreglass batts or roll+ foil/sarking)
- External wall: framed (solid or reconstituted timber weatherboard); frame: timber - H2 treated softwood (fibreglass batts or roll)
- External garage wall: brick veneer; frame: timber - H2 treated softwood (foil/sarking)
- Internal wall shared with garage: plasterboard; frame: timber - H2 treated softwood (fibreglass batts or roll)
- Internal wall: plasterboard; frame: timber - H2 treated softwood (no added insulation)
- Internal wall: plasterboard; frame: timber - H2 treated softwood (fibreglass batts or roll)
- Ceiling and roof: flat ceiling / flat roof, framed - metal roof, timber - H2 treated softwood (ceiling: fibreglass batts or roll; roof: foil backed blanket.)
Certificate 1825915S, issued 10 December 2025, from the council's DA documents.
NatHERS certificate
- Star rating
- 7 stars
- Rated with
- BERS Pro v5.2.6 (3.23)
- Rated on
- 10 Dec 2025
- Wall insulation
- R2.7
- Ceiling insulation
- R4, R6
- Floor insulation
- R2.7, R2, R4
- LED downlights
- 54
- Living room glazing by direction
- NE 2.5 m², SE 13.5 m², SW 6.8 m², NW 3.2 m²
- All glazing by direction
- NE 4.8 m², SE 14.9 m², SW 7.6 m², NW 8.9 m²
Roof
- Corrugated Iron Timber Frame Bulk, Reflective Side Down, No Air Gap Above R1.3, medium colour
- Corrugated Iron Timber Frame Bulk, Reflective Side Down, No Air Gap Above R1.3, light colour
Window types
- TIM-001-01 W Timber A SG Clear: U-value 5.4, SHGC 0.56
- DOW-002-001 Aluminium Awning Window SG 3Clr: U-value 6.4, SHGC 0.65
- DOW-016-001 Aluminium French Door SG 4Clr: U-value 6.1, SHGC 0.62
- DOW-001-015 Aluminium Sliding Window SG 4ETClr: U-value 4.5, SHGC 0.63
- DOW-025-005 Thermally Broken Aluminium Sliding Door DG 4SolB/12Ar/4Clr: U-value 1.8, SHGC 0.19
- DOW-005-010 Aluminium Awning Window DG LB GySI 6.38/10/4: U-value 3, SHGC 0.28
- DOW-005-012 Aluminium Awning Window DG LB Clr 5/10/5: U-value 3, SHGC 0.44
- DOW-002-015 Aluminium Awning Window SG 4ETClr: U-value 4.8, SHGC 0.55
- DOW-021-002 Thermally Broken Aluminium Awning Window DG 4Clr/12Ar/4ET: U-value 1.9, SHGC 0.52
- DOW-021-007 Thermally Broken Aluminium Awning Window DG 4SolB/12Ar/4Clr: U-value 1.7, SHGC 0.18
- DOW-023-006 Thermally Broken Aluminium Fixed Window DG 4SolB/12Ar/4Clr: U-value 1.6, SHGC 0.2
- DOW-017-007 Aluminium French Door DG LB ClrPrvSI 6.38/12/4: U-value 3.2, SHGC 0.33
Window schedule
- BATH, window DOW-002-001: 300 × 900 mm facing NW
- LDRY, window DOW-016-001: 2,100 × 900 mm facing NW
- BED 2, window DOW-001-015: 1,000 × 1,450 mm facing NW
- Bedroom 3, window DOW-001-015: 1,000 × 1,450 mm facing NE
- Bedroom 4, window DOW-001-015: 1,000 × 1,450 mm facing SE
- ENTRY, window TIM-001-01 W: 2,100 × 400 mm facing SW
- Kitchen/Living, window DOW-025-005: 2,400 × 3,600 mm facing SE
- Kitchen/Living, window DOW-005-010: 1,800 × 850 mm facing SE
- Kitchen/Living, window DOW-005-010: 1,800 × 850 mm facing SW
- Kitchen/Living, window DOW-005-010: 1,800 × 850 mm facing SW
- Kitchen/Living, window DOW-005-010: 1,800 × 850 mm facing SW
- Kitchen/Living, window DOW-005-012: 1,800 × 1,800 mm facing NW
- MASTER, window DOW-002-015: 857 × 2,400 mm facing NW
- ENS, window DOW-002-015: 600 × 1,450 mm facing NE
- LIVING, window DOW-021-002: 1,200 × 2,050 mm facing NE
- LIVING, window DOW-021-007: 857 × 2,050 mm facing SE
- LIVING, window DOW-023-006: 1,800 × 850 mm facing SE
- LIVING, window DOW-017-007: 2,400 × 900 mm facing SW
Certificate 0012607008, issued 10 December 2025, from the council's DA documents.
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