Green Lodge by Stylus Architects is almost entirely below ground, and yet every room in it receives natural daylight — not through technical compensation, but because going underground was the architectural idea. On a tightly constrained plot at the edge of Putney Heath in South West London, hemmed in by a Gothic Revival church, Victorian villas, and dense mature tree canopy, the only path to a generous family home was downward. The result is 175 sqm of precisely ordered domestic space that announces itself to the street as little more than a low larch cladding fence and an asymmetric vaulted roof.
The brief, by any standard, was unusual. A long-standing contractor client handed the practice a single instruction — “Do whatever you want, but it has to be quick.” That apparent freedom was immediately focused by site conditions that left almost no room for manoeuvre. Planning constraints demanded a restrained external presence, and the below-ground strategy emerged simultaneously as the pragmatic answer and the architectural one — a solution that reduced the building’s perceived scale while unlocking a spacious, well-considered home beneath the surface.
Two fair-faced concrete spine walls run the full height of the building, from basement slab to roof ridge, dividing the plan into three distinct bays. Rather than being concealed behind finishes, the fair-faced concrete is left exposed throughout, providing texture, continuity, and a tactile permanence that anchors the timber joinery surrounding it. The structural logic is visible at every turn — not as Brutalist gesture, but as a clear organisational diagram made habitable, the section reading as cleanly as the axonometric drawings from which it was derived.
The golden ratio governs more decisions here than coincidence could explain. The proportional divisions between the three plan bays, the positioning of the kitchen island beneath its rooflight, and the precise height of the bespoke lighting bar above it are all calibrated to the same system. It is the kind of rigour that does not announce itself — visitors will register a kitchen that feels oddly composed without being able to isolate why — but this invisible calibration is precisely what separates a well-detailed interior from a genuinely resolved one. Geometry at Green Lodge is not decorative. It is the building’s operating logic.
Light was simultaneously the central problem and the central solution across the entire section. A large rooflight positioned directly above the staircase channels daylight from roof level down to the basement hall, animating what would otherwise be the darkest point in the plan. Two south-facing lightwells — carved into the building mass — deliver direct daylight into every subterranean bedroom, each of which also opens onto its own external terrace. The lightwells are not just a daylighting strategy; they are also the primary passive thermal device, channelling solar gain into the rooms most in need of it and forming the environmental backbone of a house that achieved an EPC B rating by embedding sustainability into the concept from the outset.
The staircase connects all levels as the vertical centrepiece of the section — an oak and steel construction fabricated by Caelix Fabrications, rising beneath the staircase rooflight, its surfaces shifting quality as the angle of the sun changes through the day. After dark, the same precision applied to natural light is given to artificial: integrated lighting reinforces the building’s geometry rather than softening or obscuring it, tracking the structural lines and calibrated intervals that govern the plan. This continuity between natural and artificial illumination — light treated as architecture rather than accessory — runs through every room without exception.
Larch covers the entire building — walls, asymmetric vaulted roof, gate, fence — as a single unbroken material surface, reading from the street as a sculptural object rather than a building with applied cladding. Over time the timber will silver, drawing Green Lodge further into the wooded perimeter of the heath rather than asserting itself against it. This strategy of material continuity across envelope and roof connects the house to a lineage of earth-sheltered architecturethat treats disappearance into the site not as a failure of confidence but as a deliberate act — a logic that runs through projects like Mimosa Architects’ Between the Rock and the River in the Czech Republic, where topography and construction become indistinguishable.
Joinery functions as the interior’s primary language. Designed by Stylus Architects and executed by Cast London Joinery and Caelix Fabrications, built-in beds, desks, and storage are integrated into every room, their dimensions aligned to the building’s underlying grid. Children’s wardrobes convert into workspaces. Bathrooms combine exposed concrete, large-format pastel pink tiling in Mandarin Stone, and a waffle oak ceiling — materials that in other hands would read as contradiction but here cohere precisely because each is bounded by the same proportional discipline. Bespoke artwork by lead architect Matthew Withers is integrated into the building fabric, including a piece that replaces and conceals the conventional cooling grille of the air source heat pump. The client described a home that “completely transformed the way we live as a family” — a response that the architecture earns without sentimentality.
Green Lodge makes a specific argument that is worth articulating clearly: that the most formally ambitious residential work in the current London context is often produced by smaller practices operating below the radius of critical attention, where the architect who drew the section is also the person on site and every decision passes through a single intelligence rather than a committee. That the client’s brief was “do whatever you want” and the outcome is this controlled is, in the end, the most persuasive case for what a genuinely trusted commission makes possible — and for why the architecture it produces tends to be more resolved than anything designed for an audience.
Green Lodge by Stylus Architects | Location: Putney Heath, Roehampton Village, South West London — Year: 2025 — Key materials: larch cladding (walls and roof), fair-faced concrete, engineered oak, polished concrete floors, Maxlight glazing and rooflights