Sawmill Treehouse
“I wanted a compact, refined space to share with my family and friends.” This simple aspiration marked the beginning of Sawmill Treehouse. The project was commissioned by Holly, an exceptional client whose vision centered on creating a modest yet meaningful retreat for gathering with loved ones. Rather than focusing on the usual conversations around construction materials or technical finishes, Holly and designer Robbie Walker spent weeks in the early stages sharing stories about the land—its native trees, the surrounding ecosystem, and the site’s quiet history. Through these exchanges, Walker developed a deep understanding of Holly‘s care for nature, which shaped the entire design ethos. The result is a project guided by a deep sensitivity to context and ecology, where every detail was conceived through the lens of simplicity and restraint.
Set at the head of a gully in the high-altitude region of Victoria’s High Country, the site is rare for its naturally level terrain—a prized feature in such rugged topography. Surrounded by a dense forest canopy, Walker drew inspiration from the towering trunks and the gentle motion of the leaves, translating these gestures into architecture. The building is lifted to sit at the canopy line, both to mitigate flood risk in the lower ground and to make full use of the flat area beneath—now housing a carport, concealed laundry, and outdoor kitchen beneath the elevated volume. The structure is supported by four sturdy columns that echo the form of tree trunks. In a deliberate move to eliminate air-conditioning, Walker designed a breathable envelope using fire-rated, steel-framed operable louvres across the façade. These slats provide shade and cross-ventilation, reducing heat gain in summer while keeping the steel roof and cladding cool. The choice of steel was also intentional for its recyclability, meeting BAL-40 (Bushfire Attack Level 40) requirements for bushfire-prone zones. In this way, the building quietly coexists with its forested surroundings—its silhouette shifting with the light, like foliage swaying in the breeze.
Inside, the house features extensive use of FSC-certified sustainable timber, whose warm hues and tactile grain contrast beautifully with the cool steel exterior. The sensory transition begins even before entering—as visitors ascend the weathered steel steps, the soundscape of birdsong and insects gradually quiets the mind. This approach becomes a meditative threshold, guiding visitors gently into the calm of the interior. Walker’s spatial composition draws from Japanese Zen principles and Scandinavian minimalism, offering a layout that includes one bedroom, one bathroom, and an open kitchen-living area—each square meter optimized for clarity and comfort. In a market where greater scale is often equated with greater value, Holly resisted the pressure to adopt the conventional four-bedroom, three-bathroom model. It was Holly’s deliberate choice to preserve the intimacy and environmental ethic of a smaller footprint, despite financial and regulatory pressures to build bigger. This decision was not made lightly: real estate advice, financing limitations, and regulatory costs all favored a larger build. Yet Holly remained committed to the original vision—minimizing material consumption and reducing environmental impact as an intentional act. Together with Walker, Holly brought Sawmill Treehouse to life as a quiet statement of sustainable values and ecological balance—a space that invites every visitor to pause, to breathe, and to reconnect with nature.
