Curves and Cutouts as Practical Design Tools in Apartment 21
A London apartment in the north of the city has been reimagined by Piercy and Company as a flexible guesthouse and event space. The project, named Apartment 21, is not presented as a single fixed room type. It is conceived as a place for hosting private events and exhibitions, or for accommodating guests. That dual purpose makes it a useful reference for both residential interiors and small commercial spaces, because the design must balance openness, movement, display, privacy and everyday comfort.
The most interesting elements are the custom timber joinery, the curved corridor and the cutouts introduced throughout the space. Rather than relying on decorative gestures alone, these moves shape how people move through the apartment and how the room changes depending on its use. For designers working on apartments, guesthouses, studios or small hospitality projects, the case offers a clear lesson: flexible spaces are created through layout, material and boundary design, not through furniture styling alone.
A multi-use apartment begins with behaviour
The brief described in the source material is broad but specific. Apartment 21 is meant to host private events, display exhibitions and accommodate guests. These three functions need different spatial conditions. An event needs circulation and open floor. An exhibition needs walls, sightlines and lighting. A guest stay needs rest, storage and a sense of privacy. If the interior were designed for only one function, it would fail in the others.
The curved corridor helps solve this. A straight corridor usually only moves people from one point to another. A curved corridor slows movement and creates a sequence. It can guide a visitor through an exhibition without making the route feel rigid. It can also separate a public area from a private guest area while keeping the transition gentle. In a small apartment, this kind of soft boundary is more useful than a hard wall, because it preserves flow and reduces the feeling of compression.
For residential projects, the same logic can be applied to entry halls, open-plan living areas and corridors leading to bedrooms. For commercial projects, it can guide clients through a showroom, a studio or a guesthouse common area. The key is to decide what sequence of movement should feel like before choosing finishes.
Curved circulation as a quiet organiser
The mysterious curved corridor is one of the strongest features of the project. Curves are often used for emotional effect, but here they also have practical value. They can make a narrow passage feel less mechanical, and they can create a sense of discovery as the space opens gradually. In an apartment that may host exhibitions, this is especially helpful. The corridor becomes part of the viewing experience, not just a service route.
From a layout perspective, curved walls can reduce sharp corners and make the space feel more continuous. They can also help define zones without closing them off. A curve can suggest a transition from event space to guest space without a door. It can frame a view or direct attention toward a display area. In small interiors, this is often more effective than adding partitions, because it maintains visual connection while still shaping movement.
There are practical considerations too. Curved corridors need enough width for comfortable passage. Lighting should follow the curve, avoiding harsh shadows or dark pockets. Wall surfaces should be durable, especially near corners where people may brush against them. If the curve is part of joinery, the construction detail must be clean and robust. These are the points that separate a beautiful drawing from a usable interior.
Custom timber joinery as a unified system
The use of custom timber joinery is central to the project. In a multi-use apartment, built-in joinery can do more than store objects. It can form the visual order of the room. It can provide display surfaces, storage, seating edges, thresholds and background walls. Instead of adding separate furniture pieces, the designer creates a continuous system that adapts to different uses.
Timber is a strong choice for this kind of system. It brings warmth, texture and a sense of craft. It can be shaped into curved profiles and cutouts, allowing the material to become both structural and decorative. In Apartment 21, the joinery likely helps unify the interior language. The walls, doors and storage elements can feel related rather than random. This is important in a space that must switch between event mode, exhibition mode and guest mode.
For homeowners, the lesson is to think in systems. A single timber wall can combine shelving, display, lighting and storage. A custom unit can define a corridor without blocking it. A joinery element can become the main design feature, reducing the need for extra decoration. For commercial spaces, the same approach can create a flexible exhibition system, a reception backdrop or a guesthouse storage wall.
Cutouts that control privacy and light
The title of the original project highlights curves and cutouts. Cutouts are valuable because they let designers control transparency. A fully solid wall blocks sight and light. A fully open plan can feel exposed. A cutout sits between these two conditions. It can allow light to pass while still creating a sense of separation. It can frame a view while limiting direct access. It can make a compact apartment feel connected without becoming visually chaotic.
In a guesthouse or event apartment, this is especially useful. The space may need to feel welcoming during an exhibition, but private when someone is staying overnight. Cutouts can help with that shift. They can create layered boundaries: enough openness to maintain social connection, enough opacity to support rest and concentration.
This technique can be borrowed for many interior types. In a home office, a curved cutout can connect the desk area to a living space while keeping the work zone defined. In a small restaurant or studio, a timber screen with openings can separate service and guest areas. In a bedroom suite, a cutout wall can create depth without making the room feel smaller.
Material and colour strategy through restraint
The source material does not describe a detailed colour palette, but the emphasis on timber joinery suggests a material-led approach. When wood is the main material, the interior can rely on natural tones, texture and shadow. This is often more durable than trend-driven colour. A timber-dominated scheme can feel calm, refined and adaptable.
The curved corridor adds another layer: shadow. As light moves across a curved surface, the wall changes appearance throughout the day. This gives the space atmosphere without adding ornament. In small interiors, this kind of quiet material richness is valuable. It prevents the room from feeling flat while keeping the design focused.
For practical projects, this means choosing a limited palette and letting form do the work. Warm wood, soft neutral surfaces and controlled lighting can create a cohesive environment. The design should avoid too many competing finishes, especially in a space that must host different activities.
What designers can take from Apartment 21
Apartment 21 is useful because it treats an apartment as a flexible platform. It does not lock the space into one identity. It can be an event venue, an exhibition setting or a guest stay. The curved corridor gives the space a route with rhythm. The custom timber joinery gives it order. The cutouts give it light, depth and privacy.
The main takeaways are simple. First, define the behaviour before defining the style. Second, use curves to guide movement and soften boundaries. Third, use joinery to combine functions and reduce clutter. Fourth, use cutouts to balance openness and privacy. Fifth, let material and light create atmosphere instead of relying on decorative excess.
For residential interiors, these ideas can be applied at a smaller scale. A curved doorway, a timber storage wall or a screen with openings can improve flow and function. For small commercial spaces, the same moves can create a more memorable and adaptable environment. Apartment 21 shows that a compact guesthouse apartment can become a layered, flexible interior when curves, joinery and openings are used with intention.
