In the rolling countryside south of Santiago, a recently completed private residence has drawn attention from architects and conservationists for an unusual design move: the building literally curves around a protected ancient tree, treating the trunk and canopy as a non-negotiable participant in the floor plan. The owners, returning to family land after decades abroad, asked their architects to preserve a specimen they had climbed as children, and the resulting home stages its rooms around the tree rather than the other way around.
The project sits within a wider conversation about how residential architecture absorbs ecological constraint. Rather than treating preservation rules as obstacles, the design team turned the protected status of the tree into the organising principle of the house. Walls bend, the roof steps, and interior sightlines orient themselves toward the canopy, producing a plan that reads almost like a plan view of a tree embracing a building.
Such gestures are no longer fringe in contemporary residential work. From biophilic studios in Scandinavia to adaptive reuse projects in Japan, architects have been testing how a single mature organism can anchor an entire site. The Chilean residence is one of the most literal recent examples, and it offers lessons for anyone designing in regions where old trees carry legal protection, including parts of Australia where similar overlays apply.
What follows is a closer look at how the project was conceived, the materials that made the wrap-around geometry possible, and why the result is being read as a model for conservation-led design in countries facing rapid suburban expansion.
The property lies in a transitional zone between agricultural farmland and remnant native forest, an area of Chile where old growth trees still survive in pockets surrounded by cleared pasture. The specific tree around which the house was built is a native species estimated by an arborist to be more than three centuries old, with a trunk diameter that exceeds the width of a standard car. Its root zone extends well beyond the footprint of any ordinary residence, which is what triggered its formal protection under regional environmental law.
For the architects, the brief arrived with a clear condition: nothing could be removed, pruned severely, or built within a defined radius of the trunk. Rather than carve the building around an obstacle, they chose to make the tree the centre of a courtyard plan. From above, the roof reads as two arcs that almost meet at the trunk, leaving a generous open-air gap where the canopy rises through the structure and continues upward into the sky.
The protected status of the tree is not unusual in Chile. Heritage tree legislation, often tied to native species such as the peumo, the quillay, and certain araucarias, has been enforced more strictly over the past decade, particularly in regions where wine estates and rural subdivisions have multiplied. Architects working in these areas increasingly need to design with tree surveys in hand before they can finalise a single wall.
The design team approached the constraint as a generative problem. They began by mapping the drip line of the canopy, the root protection zone, and the seasonal movement of the sun through the branches, then folded those measurements back into the plan. The house is organised on two levels, with the lower floor containing the more private rooms and the upper floor opening toward the tree through generous glazing and a continuous timber deck.
The roof is a pair of gently sloping planes that step upward where the canopy is thickest, allowing the branches to pass over the structure without conflict. Steel columns were positioned outside the root protection zone, transferring loads to foundations placed at a respectful distance. Inside, the trunk becomes a vertical feature framed by full-height openings, and the rooms on either side read almost as two halves of the same continuous space.
This kind of curving geometry is unusual in residential work because it complicates detailing and material takeoffs. Yet the architects treated the irregularity as part of the brief. Window openings follow the sweep of the canopy rather than the orthogonal logic of the rooms behind them, producing facades that are unexpectedly sculptural from the outside while still feeling calm and ordered from within.
Material selection followed the project’s environmental logic. The primary structure is a steel frame clad in locally fired brick, chosen for its thermal mass and its capacity to be laid in long, sweeping curves without the cracking problems associated with rigid concrete forms. Floors are wide-plank reclaimed timber, much of it sourced from old agricultural buildings on the same property, reducing the embodied carbon of the interior.
Glazing plays a significant role. Large, curved glass panels were manufactured offsite and craned into position before the tree’s fruiting season, to avoid disturbing nesting birds and insects that occupy the canopy. Where the roof meets the tree, a custom-fabricated zinc flashing rises in a curved collar, allowing the trunk to move slightly in the wind without compromising the building envelope.
Details like these are time-consuming and expensive, but the architects argue that they are the point. Working around a living organism means accepting tolerances that no standard construction manual covers. The result is a building that has been detailed with patience, and that will likely need only modest maintenance for decades because its forms were derived from the tree rather than imposed on the site.
Inside, the experience of the tree is continuous. The trunk is visible from the entry sequence, the kitchen, the main living area, and the principal bedroom, and the deck that wraps the upper level puts residents within arm’s reach of the lower branches. During summer, the canopy filters harsh direct light, and during winter, when the tree drops its leaves, more sun reaches the southern rooms.
The owners describe the home as quieter than they expected. The mass of the canopy dampens wind, the brick walls stabilise interior temperatures, and the tree itself supports a surprising population of birds and insects that have colonised the new microclimate created by the curved roof. For the family, the home has become a small observatory, and they have started keeping a species log of the wildlife that visits the canopy each week.
This integration is not decorative. The tree does work: it shades the south-facing glazing, it cools the courtyard through evapotranspiration, and it anchors the emotional life of the house. In architectural journalism, this is sometimes called a tree-led plan, and it remains rare because few clients are willing to accept the loss of conventional rectangular rooms in exchange for what the tree offers.
Australian designers will recognise parts of this brief. Councils in Victoria, particularly within the City of Melbourne and several inner-urban municipalities, operate significant tree protection overlays that prohibit removal of mature specimens without permits and impose design constraints on any new building nearby. In Sydney, campaigns to save heritage figs and Port Jackson figs have shaped apartment schemes and pushed architects to incorporate existing canopies into podium and ground-floor plans.
Local practices working around Brisbane’s subtropical suburbs, or the adaptive coastal studios of northern New South Wales, increasingly produce homes where the planning diagram begins with the survey of existing vegetation rather than the boundary fence. Melbourne Design Week has featured several recent projects built around single mature trees, and the conversation around what Australian architects call tree-positive design is gaining ground in industry publications read by residential clients.
For Australian homeowners considering a similar approach, the regulatory path matters as much as the architectural one. Engaging an arborist at the earliest sketch stage, confirming protection status with the local council, and budgeting for curved structural framing are all steps that distinguish a feasible project from one that breaks down during documentation. The Chilean residence demonstrates that the extra effort, when handled early, produces a home that is genuinely shaped by its site.
The ecological argument for the design is straightforward. The tree sequesters carbon, supports local fauna, and stabilises soil that would otherwise be exposed across the cleared footprint of a typical residence. By keeping the canopy intact, the home retains a mature ecosystem that would take a century or more to replace through planting.
The conservation outcome is equally important. The protected status of the tree now carries with it a permanent design constraint, which means the site is unlikely to be cleared or redeveloped in a way that threatens the specimen. Future owners, whoever they may be, inherit not only a house but a covenant written into the building itself.
In a broader sense, the project offers a counterpoint to the loss of mature trees in expanding residential zones. Subdivisions on the urban fringes of Australian capitals regularly remove large canopy specimens because they complicate siting, and the resulting developments are noticeably hotter, drier, and less biodiverse. Projects like the Chilean residence suggest that a more constrained plan can still produce generous living space, provided the constraint is treated as the start of the design rather than its limit.
Reaction from the design press has been warm. The residence has appeared in regional architecture year-end reviews and was discussed at length during Salone del Mobile in Milan, where biophilic and conservation-led briefs dominated several of the fringe programmes. Editors noted that the home reads cleanly in photographs because the geometry is legible from any angle, which is unusual for projects that incorporate biological features.
Critics have pointed out that such projects depend heavily on a sympathetic client. A protected tree, an informed architect, and a budget that allows for custom fabrication are all required, and few residential briefs arrive with all three. Even so, the project has been cited as a working model for practices that want to enter the conservation-led market without compromising on spatial ambition.
The most interesting follow-up question is whether the approach can be replicated at lower cost. Several emerging studios are exploring prefabricated curved framing systems that could reduce the expense of organic geometry, and a few Australian practices are already experimenting with similar kits for steep or tree-rich coastal blocks. If those efforts succeed, the wrap-around house may move from a one-off gesture into a recognisable typology.
| Project | Location | Tree integration | Structural approach | Approximate budget profile |
|---|---|---|---|---|
| Featured Chilean residence | Central Chile | Tree passes through courtyard, rooms wrap canopy | Steel frame, curved brick cladding, custom zinc flashing | High, due to bespoke glazing and curved brickwork |
| Melbourne tree-positive residence | Inner Melbourne, Australia | Heritage elm retained, glazed corner opens to canopy | Timber frame with reinforced steel beams | Moderate to high |
| Sydney fig-house apartment | Eastern Suburbs, Sydney | Protected Port Jackson fig integrated into ground-floor courtyard | Concrete podium, lightweight timber upper levels | High, due to engineering coordination |
| Japanese forest studio | Nagano, Japan | Single ancient cedar anchors entire plan | Glued-laminated timber frame, curved roof plane | Moderate |
| Brisbane subtropical courtyard home | Western Brisbane, Queensland | Mature hoop pine retained as central courtyard feature | Hybrid steel and timber with louvred shading | Moderate |
For homeowners and designers drawn to conservation-led residential work, the following practical steps tend to distinguish a successful project from a stalled one:
If you are working on a residential project in Australia where a mature tree shapes the site, begin by treating that tree as the brief. The architects behind the Chilean residence showed that the most distinctive homes are often those that submit to something older than themselves, and the Australian context offers plenty of opportunities to do the same. Subscribe to Tony Cucco for more coverage of international projects that put ecology and architecture on the same page.
