Contemporary kitchen and dining space at Radhus by Stylus Architects in Clapham, South-West London, featuring exposed brickwork, bespoke red kitchen joinery, steel-framed glazing, side extension, basement extension, and deep retrofit whole house renovation.

Radhus

Radhus

Radhus is a comprehensive transformation of a former HMO in the heart of Clapham, reimagined as a vibrant contemporary family home. The project responds to the constraints of a tight city site while introducing bold spatial interventions that maximise light, volume, and everyday functionality.

A standout feature is the double-height space connecting the sunken lower ground floor to the upper ground floor ceiling. This dramatic void floods both levels with natural light and creates a sense of openness absent in the original HMO layout. A five-metre-tall Crittall window divides the kitchen island, offering framed views of the city garden from the mezzanine above and anchoring the home’s spatial experience. The industrial aesthetic of the lower ground floor is softened through a considered palette of textures and vibrant colour accents, producing a warm yet contemporary living environment.

The renovation reinstates and reinterprets the property’s original period features with a modern sensibility. The fireplace, wall panelling, and other heritage elements are carefully integrated, while bold interventions, including a burnt orange kitchen and staircase and a deep bottle green living room, inject energy and character. These choices create a dialogue between the historic and contemporary, enhancing the building’s personality while respecting its architectural lineage.

Contemporary kitchen extension at Radhus by Stylus Architects in Clapham, South-West London, featuring exposed brickwork, double-height steel-framed glazing, bespoke kitchen joinery, basement extension, and deep retrofit whole house renovation.

“Matt and his team were great; transformed our tired HMO, 'trad Victorian terrace' into a breath-taking contemporary space. We said we wanted a “WOW room”. It is truly a striking space full of height and light.”

Richard and Kate (Client)
Contemporary living room at Radhus by Stylus Architects in Clapham, South-West London, featuring bespoke dark joinery, oak flooring, deep retrofit interior design, and whole house renovation with side and basement extension.

Colour, Shape and Texture

Colour plays a central role in shaping the character of the home, used not as surface decoration but as a spatial and emotional device. Bold, saturated tones are deployed strategically to define zones, guide movement, and bring energy to the interior. The burnt orange kitchen and staircase act as a unifying thread through the heart of the house, while the deep bottle green living space creates a grounded, intimate counterpoint. These confident colour choices animate the architecture, reinforcing the dialogue between old and new and giving each space a distinct identity.

Form and materiality are equally considered. Strong geometric gestures, most notably the double height void and the sculpted staircase, introduce moments of drama and verticality, balanced by softer detailing and tactile finishes. Exposed brickwork, warm timbers, aged metals, and layered textures temper the industrial qualities of the lower ground floor, while smoother surfaces and finer detailing above create a calmer, more refined atmosphere. Together, colour, shape, and texture are carefully orchestrated to produce a home that feels rich, cohesive, and expressive, while remaining grounded in everyday comfort and use.

Contemporary reception room at Radhus by Stylus Architects in Clapham, South-West London, featuring bespoke green joinery, period detailing, oak flooring, and deep retrofit whole house renovation with side and basement extension.
Steel-framed internal glazing at Radhus by Stylus Architects in Clapham, South-West London, featuring contemporary staircase detailing, bespoke green interiors, oak flooring, and deep retrofit whole house renovation with side and basement extension.
Existing photo of HMO before transformation
Existing photo of HMO before transformation

Before and After: A Dramatic Shift

The original interiors were typical of a former HMO, with little sense of identity or spatial generosity. The existing living rooms were neutral and functional, finished with white walls, basic lighting, and carpeted floors, offering minimal connection to the building’s period character. Similarly, the lower ground basement was long, narrow, and inward looking, finished with laminate flooring and stripped of any architectural presence. These spaces felt flat and soulless, defined more by expediency than by quality or comfort.

The transformation is deliberately dramatic. The living rooms are redefined through the introduction of full height Crittall screens, opening views through the plan and creating a stronger relationship between the hallway and the new middle reception room. Colour, texture, and restored period detailing bring depth and atmosphere, replacing uniformity with richness and personality. At lower ground level, the structure is stripped back to brick, with existing walls exposed and new brickwork carefully rebuilt to reinforce a robust, tactile character. Purposeful joinery and a bespoke kitchen designed by Stylus Architects anchor the space, while the opened staircase strengthens visual and physical connections between levels.

A burnt orange kitchen and staircase sit confidently against a backdrop of brick, muted grey joinery, and natural materials, including timber and clay, creating an urban, understated elegance. Distressed timber flooring adds warmth and tactility, complementing the earthy palette and industrial undertones. Where there was once little character, the home now feels layered, expressive, and alive, with spaces that celebrate materiality, craft, and a renewed sense of history.

Contemporary reception rooms at Radhus by Stylus Architects in Clapham, South-West London, featuring bespoke green joinery, steel-framed glazing, period detailing, and deep retrofit whole house renovation with side and basement extension.
Existing photo of HMO before transformation
Contemporary kitchen and dining space at Radhus by Stylus Architects in Clapham, South-West London, featuring exposed brickwork, bespoke red staircase joinery, steel-framed glazing, oak flooring, and deep retrofit whole house renovation with side and basement extension.
Rear elevation drawing for Radhus by Stylus Architects in Clapham, South-West London, featuring side extension, basement extension, contemporary loft conversion, and deep retrofit whole house renovation design.

Cutting the Section

The longitudinal section illustrates the core design concept: connecting levels through the double-height void and mezzanine to create openness and visual flow. It shows how the open staircase and full-height glazing link spaces, and how relationships between volumes, light, and circulation were carefully tested during the design phase.

Section drawing for Radhus by Stylus Architects in Clapham, South-West London, illustrating side extension, basement extension, loft conversion, and deep retrofit whole house renovation design.
Rear glazed side extension at Radhus by Stylus Architects in Clapham, South-West London, featuring steel-framed glazing, black metal cladding, exposed brickwork, and deep retrofit whole house renovation with side and basement extension.

Dialogue with the Garden

The design carefully negotiates a small garden while strengthening the connection between interior and exterior. A new side extension, lightweight in metal and glass, complements the existing structure without overwhelming it. The long, double-height Crittall window was inserted into the original façade, with the lintel of the old sash window retained to mark the top of the new frame. The surrounding brickwork was preserved, scars and all, celebrating the building’s visual history rather than erasing it.

By splitting the garden into two levels, more natural light penetrates the interior, and a stronger visual and physical connection is established between inside and outside. This subtle intervention expands the perception of space, allowing the home to feel larger and more integrated with its surroundings despite the compact site.

Contemporary kitchen extension at Radhus by Stylus Architects in Clapham, South-West London, featuring exposed brickwork, double-height glazing, bespoke red kitchen joinery, industrial cooker detailing, and deep retrofit whole house renovation with side and basement extension.
Contemporary kitchen extension at Radhus by Stylus Architects in Clapham, South-West London, featuring frameless roof glazing, exposed brickwork, steel-framed doors, bespoke kitchen joinery, and deep retrofit whole house renovation with side and basement extension.
Rear glazed extension at Radhus by Stylus Architects in Clapham, South-West London, featuring double-height steel-framed glazing, exposed brickwork, black metal cladding, and deep retrofit whole house renovation with side and basement extension.

A Vertical Moment

The double-height space serves as the home’s central feature, connecting the lower ground and upper levels while framing views to the exterior. The tall Crittall window punctuates the façade, drawing light deep into the plan and creating a dramatic backdrop for the kitchen below. From the mezzanine, the space feels open and airy, while views from beneath emphasize the scale, materiality, and layered character of the interior. This vertical moment brings together circulation, light, and social activity in a single, dynamic volume.

Contemporary kitchen extension at Radhus by Stylus Architects in Clapham, South-West London, featuring exposed brickwork, double-height steel-framed glazing, bespoke red kitchen joinery, and deep retrofit whole house renovation with side and basement extension.

“The Stylus team worked collaboratively with great design ideas – absolutely fab team and fun!”

Richard and Kate (Client)
Double-height stair landing at Radhus by Stylus Architects in Clapham, South-West London, featuring exposed brickwork, steel balustrades, oak flooring, double-height glazing, and deep retrofit whole house renovation with side and basement extension.
Rear extension and basement lightwell at Radhus by Stylus Architects in Clapham, South-West London, featuring double-height steel-framed glazing, black metal cladding, exposed brickwork, and deep retrofit whole house renovation with side and basement extension.
Bespoke staircase detail at Radhus by Stylus Architects in Clapham, South-West London, featuring custom red staircase joinery, steel balustrades, patterned stair runner, and deep retrofit whole house renovation with side and basement extension.

A Sculpted Journey

The staircase is a carefully considered feature, linking all levels of the home while reflecting the character of the upper spaces. From the ground floor, the design takes on a subtly more traditional approach, with thin metal spindles in the hallway creating a wave effect that is both practical and dramatic. This gesture maximises the perception of space in the tight hall and works with the adjacent full-height Crittall screen to open the hall visually. On the lower ground, the staircase cleverly conceals a toilet, combining functionality with a clean and seamless design. Fully designed by Stylus Architects, the stairs balance material precision, elegance, and spatial ingenuity, shaping circulation while enhancing the home’s layered character.

Bespoke staircase and concealed WC door at Radhus by Stylus Architects in Clapham, South-West London, featuring custom red staircase joinery, exposed brickwork, integrated storage, and deep retrofit whole house renovation with side and basement extension.
Contemporary kitchen and staircase at Radhus by Stylus Architects in Clapham, South-West London, featuring bespoke red staircase joinery, exposed brickwork, industrial kitchen detailing, and deep retrofit whole house renovation with side and basement extension.
Contemporary staircase and hallway at Radhus by Stylus Architects in Clapham, South-West London, featuring bespoke steel balustrades, oak flooring, steel-framed glazing, and deep retrofit whole house renovation with side and basement extension.
Contemporary stair landing at Radhus by Stylus Architects in Clapham, South-West London, featuring exposed brickwork, bespoke steel balustrades, oak flooring, and deep retrofit whole house renovation with side and basement extension.
Contemporary kitchen and dining space at Radhus by Stylus Architects in Clapham, South-West London, featuring exposed brickwork, frameless roof glazing, bespoke grey joinery, oak dining furniture, and deep retrofit whole house renovation with side and basement extension.

A Home Transformed

From tight, compartmentalised rooms to open, light filled spaces, Radhus bursts with character, drama and carefully crafted details. Every intervention, from the double height void to the bespoke joinery, brings movement, texture and personality, creating a home that is as dynamic as it is functional.

Contemporary kitchen extension at Radhus by Stylus Architects in Clapham, South-West London, featuring exposed brickwork, frameless roof glazing, bespoke red kitchen joinery, steel-framed glazing, and deep retrofit whole house renovation with side and basement extension.

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