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Bunratty is a completed family residence in The Gap on Brisbane’s western edge, designed by Alexandra Buchanan Architecture for a five-acre hillside site. Its defining move is to split the house into two interlocking volumes that lift apart around a central saddle, allowing living spaces to bridge the slope while opening long views toward Brisbane.
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Random freezes, missing sound and display glitches usually trace back to one bad driver. Find and replace yours safely.Free scan · under a minuteRather than treating the terrain as a problem to level, the design makes the terrain its organiser. Arrival, rooflines, circulation, privacy and outlook all follow the steep easterly landform. The result is a 451-square-metre home whose architecture is experienced as a sequence of framed views, compressions and releases.
Project facts at a glance
| Item | Documented information |
|---|---|
| Project | Bunratty House |
| Location | The Gap, Queensland, on Brisbane’s western edge |
| Use | Family residence |
| Reported floor area | 451 sqm |
| Architect | Alexandra Buchanan Architecture |
| Architectural team | Alexandra Buchanan and Shane Wilmett |
| Design team | Westera |
| Construction team | M2 Construction |
| Photographer | Andy Macpherson / Andy McPherson Studio (the project sources use both spellings) |
| Named materials | Stone, timber, glass and steel |
| Completion listing | 2021 on the Alexandra Buchanan Architecture project page; 2022 in Architecture & Design and e-architect listings |
Architecture & Design lists the project as complete in 2022 and credits Andy Macpherson as photographer. The architect’s own page gives 2021 as the completion year, so the date should be attributed to the source rather than presented as settled fact.
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The site dictates the architecture
Bunratty occupies five acres of rolling hillside, but the relevant condition is more specific than the broad description suggests: the house sits on steep easterly terrain with views extending toward Brisbane. The architect’s account describes a design process that had to respond to 360-degree outlooks, bushfire overlays and the practical consequences of building on a slope.
Those constraints become spatial opportunities. Instead of placing a single object on a platform, the scheme is arranged as two volumes that respond to the changing levels. They lift and separate, creating a central saddle. This saddle is the project’s key spatial hinge: it allows parts of the home to sit apart while shared living areas bridge the landscape between them.
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The approach is visible before the front door. A meandering driveway reveals the building gradually rather than presenting a complete elevation in one view. That route turns arrival into a controlled sequence. The house appears, disappears and reappears as the driveway follows the land, so the visitor understands the topography through movement.
Two interlocking volumes and a central saddle
Separating the masses
The two-volume strategy gives Bunratty a legible organisation without reducing it to a simple bar or courtyard plan. Each mass can follow the slope and maintain its own relationship to the ground, while the interlocking arrangement prevents the residence from reading as two unrelated buildings.
At the point where the volumes lift apart, the central saddle acts as a connective landscape room. Living spaces bridge this opening, making the transition between inside and outside part of the plan rather than an afterthought. The geometry also creates changing sightlines: views can run through the house, along its edges or out across the valley.
Public and private hierarchy
The architect describes a deliberate hierarchy between public and private spaces. In practical terms, that means the most communal rooms occupy the parts of the plan that can take advantage of broad outlooks and shared movement, while more private areas are given separation and controlled exposure.
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1Clear out junk files and repair common Windows errors2Scan for outdated or missing drivers - takes under a minute3Repair Windows errors before they cause bigger problemsThe sources do not publish a room-by-room schedule, so it would be inaccurate to assign particular bedrooms, bathrooms or service spaces to a specific wing. What is clear is the planning principle: the house is organised so that family life can gather around the landscape without making every part of the residence equally exposed.
Rooflines that continue the terrain
Bunratty’s roofs are described as continuing the reading of the terrain. This is more than a visual gesture. When roof planes track the slope, the building can appear to grow from the hillside instead of sitting on top of it. The roof becomes a second ground line, echoing the landform above the occupied spaces.
The client, identified only by that role on the architect’s project page, names a “floating roof” and a “green roof” among the standout features. These terms describe distinct experiences: a floating roof suggests visual lightness and a deliberate gap between shelter and wall, while a green roof extends the landscape language across the building itself.
No measured energy, storm-water or ecological performance result is published in the project material. The green roof should therefore be understood as a documented design feature, not as proof of a particular environmental rating or percentage reduction in heat gain.
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Material palette: stone, timber, glass and steel
The architect identifies four primary materials: stone, timber, glass and steel. Their importance lies in the contrasts they establish across the interlocking forms.
- Stone gives the composition visual weight and a direct relationship to the ground. Its mass can anchor portions of the house where the slope demands a sense of permanence.
- Timber introduces a warmer, more tactile register. In a residence organised around long views, timber can mark areas of occupation and touch against harder structural materials.
- Glass supports the project’s view-driven planning. It allows the landscape to remain present at the edges of living spaces and helps the central saddle operate as a visual connector.
- Steel is suited to the project’s lifted and cantilevered moments. It can carry the visual logic of long spans while keeping roof and floor edges comparatively thin.
The documentation does not provide a complete schedule of finishes, colours, suppliers or construction details. Any reading of the palette should stay with these named categories rather than assigning an unrecorded species of timber, stone type or coating.
Floating roof, green roof, pool and cantilever
The client’s description identifies four standout elements: a floating roof, a green roof, an infinity-edge pool and a cantilevered section. Together they explain how Bunratty combines visual drama with the demands of a steep site.
Floating roof
A floating roof establishes a strong horizontal datum above the irregular hillside. Its apparent separation from the walls can make the shelter read as a plane hovering over the occupied spaces, reinforcing the sense that the building has been carefully lifted rather than pushed into the ground.
Green roof
The green roof extends the site’s vegetation onto the architecture. In a project where the roofs are said to continue the terrain, planted surfaces help blur the distinction between natural slope and constructed form. The available sources do not state the roof’s planting mix, depth, irrigation method or maintenance regime.
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Infinity-edge pool
An infinity-edge pool is especially consequential on a view-oriented hillside. Its disappearing edge can align water with the distant valley or city, turning the pool into a horizontal instrument for measuring the view. The project descriptions identify the feature but do not publish its dimensions, orientation or technical specification.
Cantilevered section
The cantilever expresses the project’s willingness to project over the slope. It can create shaded outdoor space below, extend a room toward a view or reduce the need for a broad level platform. The sources name the cantilever but do not identify its span, structural system or exact room use.
Design development and the decisions behind the form
The architect reports that four or five concept options were explored before the plan reached the desired balance. That statement is useful because it shows the final form was not presented as an inevitable response to the site. The design team tested alternatives against several competing demands:
- capturing views in more than one direction rather than privileging a single facade;
- working with steep easterly terrain instead of flattening the site;
- responding to bushfire-overlay requirements during planning;
- establishing a clear relationship between public and private areas;
- making arrival feel gradual through the winding driveway; and
- aligning roofs and major edges with the landform.
The sources do not show the rejected schemes, so no evidence supports ranking one option as more efficient, sustainable or economical than another. What can be said is that the selected arrangement balances outlook, movement, privacy and terrain through the interlocking-volume strategy.
Independent reader supportYour contribution helps us test, update, and keep practical guides available for everyone.How to read Bunratty as a visual composition
For painters, photographers and anyone studying architectural form, Bunratty offers a useful lesson in sequencing. The house is not designed to be understood from one frontal image. Its character emerges through changing viewpoints.
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Start with the approach
Follow the logic of the meandering driveway. Note where the building first becomes visible, which parts remain concealed and how the roofline changes as the ground rises or falls. This is the project’s introductory composition: landscape controls the reveal.
Find the saddle
Look for the point where the two volumes lift apart. The saddle is the organising void, linking the masses while keeping the hillside legible. In a drawing, it can be treated as the pause between two larger shapes; in a photograph, it is the opening that lets the eye travel through the building.
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Compare the roof planes, pool edge, floor lines and distant horizon. The floating roof and infinity edge are not isolated features; they participate in a family of horizontals that steady the composition against the slope.
Separate mass from transparency
Stone and steel read as more substantial elements, while glass opens the envelope and timber softens the transition between structure and occupation. Studying those shifts helps explain how the house can feel grounded and open at the same time.
What the published record establishes—and what it does not
The available project descriptions establish Bunratty’s location, use, reported area, design team, materials and principal features. They also document the site responses and the exploration of multiple concepts. They do not provide independently measured energy performance, bushfire-resistance results, construction costs, embodied-carbon calculations, detailed structural data or post-occupancy findings.
That distinction matters when interpreting photographs or promotional descriptions. A green roof, extensive glazing or a cantilever may suggest particular environmental or structural outcomes, but the published record does not quantify them. The safest conclusion is architectural rather than numerical: Bunratty is a house shaped by topography, views and a carefully staged relationship between two lifted volumes.
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Why Bunratty is significant within the project list
Bunratty demonstrates how a family home can be planned as a piece of landscape infrastructure. Its rooms, roofs and outdoor elements are tied to the hillside rather than arranged on a neutral site. The central saddle gives the plan a recognisable spatial idea; the driveway turns arrival into a cinematic sequence; and the material palette keeps the building connected to both ground and horizon.
For Alexandra Buchanan Architecture, the project also shows an approach in which site analysis is translated into built form. The architect’s team—Alexandra Buchanan and Shane Wilmett—with Westera credited for design and M2 Construction for construction, developed a residence where the major visual features serve the same underlying purpose: making a steep, view-rich site inhabitable without erasing its character.
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