Oxley House 2018

Oxley House
Darlington WA 6070
Full address will be displayed on 05 Sep 2019
10am – 4pm
House Open Style
Open House – No booking required
Entry fee or Donation
Gold coin
Donations supporting
Sustainable House Day 2019
Housing Type
Standalone House
Project Type
New Build
Studio Origami
Chalk Build
House Size
Number of bedrooms
Number of bathrooms

Comfort, healthy indoor environment, high performance and meeting the budget were the key things we wanted to achieve when designing this home.

Being client and designer in one, we went through a few different concepts and shapes to find the most cost-effective solution that would work with the site and would position the house in a way that allows for the outdoor areas to be used in collaboration with the interiors.

Using ready-cut structural insulated panels (SIPs) in a hybrid way, we have managed to lower the cost of the build by approximately 10%, which was a major benefit.

Colorbond cladding that wraps over the first floor and covers the gutters and downpipes was one of the details that we really favoured and carefully planned. Playfulness of textures and finishes, secret passage on the upper floor, and central staircase with exposed oriented strand board (OSB) are all integral to the design. The OSB acts as a major interior feature and is a great example of how functionality can be linked with the visual perception of the space.

This house has just recently won a few BDAWA Awards:

  • Best New Residential design up to $500,000 – State winner
  • Best Residential Interior design – State commendation
  • GreenHouse Project of the year – State winner

Key features:

  • Three bedrooms, three bathrooms, activity, central kitchen–dining area, separate living on the granny flat, office and balcony (house floor area 260m2) +17m2 store
  • 2805m2 site with northern aspect
  • Double carport
  • Raked ceiling to upper floor with exposed SIP panels to half
  • Central staircase with feature timber screen
  • Thermal mass of slab used to regulate internal temperatures laid on Cupolex domes and thermal wrap
  • Double-glazed low-e windows with thermally broken frame
  • Airtight SIP construction with energy recovery ventilation system for ventilation and healthy indoor environment
  • Stiebel Eltron hot water heat pump
  • Aerobic treatment unit (ATU) for sewer and greywater management.

Designed by Studio Origami and built by Chalk Build.

Gold coin entry supports Sustainable House Day 2019.

To find out more about the NatHERS (Nationwide House Energy Rating Scheme) click here.


Cost estimate of sustainable home/features
Total cost of home when constructed
Estimate of annual savings
Universal design accessability
Adaptive design
Universal Design Features
80cm minimum door opening width
Contrasting colours and material for vision impaired
Hobless showers
Lever handles for doors (no knobs)
Pull-out shelving easily accessible in wheelchairs
BAL Rating
BAL – 29: Increasing levels of ember attack and ignition of debris with a heat flux of up to 29kW/m2
Roofing materials
Insulated panel (sandwich panels)
Metal (colorbond)
Wall materials (external and internal)
Structural insulated panels (SIPs)
Window and door types
Double glazing
Low-e, films
Sliding windows/doors
Pocket doors
Window and door shading
Deciduous tree/vegetation
Recycled and reused
Sustainable materials
The Oxley House was designed using SIPs modular panels and introducing some Passive House concepts into the project. Keeping the structure light and airtight with double-glazed windows and mechanical ventilation. Orientated towards the north, it is filled with light; minimal east and west glazing. Additionally, Velux skylight located on the southern side let filtered light to the upper-floor bathroom and staircase all the way to the ground-floor entry. This also allows the heat build-up escape easily on the warmer days. Excavated topsoil from the previous house slab was contained on-site rather then removed and Cupolex product was used to reduce the need for creating a new sand pad and replace the engineered fill under the slab. Allowances have been made to connect the house to PV panels when budget allows and install rainwater tank in the internal courtyard for garden needs. Permaculture garden beds in the internal courtyard designed in close proximity to the kitchen for ease of care. ATU unit installed to reuse recycled water for garden irrigation.
Insulation - Under roof
Type: Insulated panels
Rating: R4.08
Insulation - External walls
Type: Insulated panel system
Rating: R3.57
Insulation - Internal walls
Type: Insulated panel system
Rating: R2.8
Insulation - Under floor
Type: Bulk – glass wool
Rating: R4.0
Healthy home
Airtight house design
Cross-flow ventilation
Heat recovery ventilation (HRV)
Indoor plants for air filtration
Low VOC paints/sealer/varnish
Energy star rating type
Energy star rating
7.4 Stars
All electric home
Size of PV system
Water heating
Hot water heat pump
Passive heating cooling
Passive solar designed home
Thermal mass
Active heating cooling
Ceiling fans
Heat exchange ventilation system
Heat pump
Energy efficiency
Draught proofing
Efficient lighting
Efficient appliances
Water harvesting and saving
Blackwater system
Greywater system
Stormwater management
Garden / Outdoors
Edible garden
Water-wise plants