Apartment Renovation Strategies: Converting Closed Rooms to Open Plan Living

Renovating an older apartment into an open-plan living space is one of the most effective ways to improve its function, light, and sense of spaciousness. Many apartments built 30 to 50 years ago were designed with compartmentalized floor plans featuring separate living room, dining room, kitchen, and multiple bedrooms, each isolated by full-height walls and narrow doorways. While this layout suited the living patterns of previous decades, contemporary residents often prefer connected spaces that allow light, air, and social interaction to flow freely. The way a renovated space reflects the way people actually live is the core principle driving open-plan conversions across all types of buildings, from homes to workplaces.

Assessing the Existing Apartment Conditions

Before any walls come down, a thorough assessment of the existing apartment establishes what is possible. In older buildings, the structural system may include load-bearing interior walls that cannot be removed without adding beams or columns. Utility lines plumbing vents, electrical circuits, and ductwork may run through walls that the open plan would eliminate. Window placement determines how much natural light is available and where it falls throughout the day.

Apartments with windows on two opposite sides are ideal candidates for open-plan conversion because they allow cross-ventilation and balanced daylight. South-facing and north-facing windows, in particular, provide consistent light throughout the day without the harsh glare of east or west exposures. The depth of the apartment from window wall to window wall determines whether an entirely open plan is feasible or whether partial partitions are needed to break up the space. Adaptive reuse approaches applied to older buildings share many of the same assessment and planning steps as apartment renovations, especially when dealing with existing building fabric that was never designed for open layouts.

Identifying Non-Structural and Load-Bearing Walls

Before demolition, each interior wall must be classified as load-bearing or non-structural. A structural engineer can determine this by examining the building plans, the direction of the floor joists, and the wall thickness. Non-structural partition walls can be removed entirely. Load-bearing walls require steel or laminated veneer lumber beams to carry the load across the new opening. The cost difference is significant: removing a non-structural wall may cost a few hundred dollars, while installing a beam to replace a load-bearing wall can run several thousand dollars depending on span length and access conditions.

Checking for Hazardous Materials

Apartments built before 1980 often contain materials that require special handling during demolition. Asbestos may be present in ceiling texture, floor tiles, pipe insulation, and drywall joint compound. Lead-based paint is common in pre-1978 buildings. Both materials require licensed abatement contractors and cannot be removed through normal demolition. Testing should be completed before any wall removal begins, as abatement costs and timelines can affect the project schedule. Budget an additional 5 to 15 percent of the renovation cost for potential abatement work in older apartments.

Planning the Open Plan Layout

Converting a multi-room apartment to an open plan is not simply a matter of removing all interior walls. The resulting space must still accommodate all the functions of a home: cooking, eating, relaxing, sleeping, bathing, and storage. The layout must define zones for each activity without relying on full-height partitions.

Successful open-plan layouts follow a few established patterns:

• The kitchen is positioned along one wall or in an island configuration, with the dining area adjacent and the living zone beyond
• Sleeping areas are placed at the ends of the apartment farthest from the entry and kitchen, where noise and activity are lowest
• Bathrooms remain enclosed but can be reconfigured to improve access and add natural ventilation
• Storage is consolidated into a single large closet that spans the full width of the room, creating a buffer zone between living and sleeping areas

Ergonomic furniture and thoughtful workstation placement become more important in open-plan apartments where dedicated rooms for quiet activities no longer exist. A desk area tucked behind a partial-height partition or inside a deep closet provides focused work space without a separate room. Defining these zones early in the design phase ensures that electrical outlets, data ports, and lighting are positioned correctly before the walls are finished.

Using Large Furniture as Space Dividers

In an open-plan apartment, furniture takes on the role that walls once served. A large closet unit spanning the width of the room can separate the sleeping area from the living area while providing storage for both zones. A tall bookshelf or cabinet defines the edge of the home office zone without blocking light. The key difference between furniture-as-divider and a permanent partition is flexibility: furniture can be rearranged as needs change without construction work.

Sizing Freestanding Dividers for Open Plans

Freestanding furniture used as space dividers should stay below eye level for a seated person about 105 to 120 centimeters high to maintain visual connection across the room. Full-height wardrobes and closets can be used as dividers when placed perpendicular to the window wall, rather than parallel to it, so that one side of the unit receives light while the other side creates a more enclosed alcove. Building a custom bookcase for a small space offers the advantage of tailoring dimensions exactly to the room. A custom divider can incorporate storage on both sides, with shelves facing the living area and closed cabinets facing the sleeping zone.

The Full-Width Closet Strategy

One effective approach from a Tokyo apartment renovation uses a large closet that spans the entire width of the room. This single piece of furniture replaces the storage that would have been distributed across multiple bedrooms and hall closets in the original layout. The closet acts as a visual and acoustic buffer between the entry zone and the sleeping area, while the space above and around it remains open for light and air circulation. Angling the closet doors slightly creates subtle gaps that make the room feel larger by allowing glimpses of the space beyond.

Surface Treatments That Transform the Space

When interior walls are removed, the remaining surfaces ceiling, floor, and the few existing walls become much more prominent. The treatment of these surfaces determines the character of the renovated space. In the House of Wind and Light renovation, the existing ceiling and walls were left in their original state rather than being covered with new finishes. Lace curtains hung along the full width of the walls served as the new finish, creating a deliberate contrast between the rough existing surfaces and the delicate fabric.

This approach of leaving existing surfaces exposed and adding selective new finishes offers several advantages:

• It reduces material costs by eliminating the need to skim-coat or re-plaster entire walls
• It preserves the history of the space, with marks from previous occupants visible as a record of the apartment’s life
• It creates visual depth through the contrast between aged and new materials
• It speeds up the renovation timeline since less surface preparation is required

Converting existing spaces for new uses whether an apartment, a barn, or a commercial building relies on the same principle: work with what the existing structure offers rather than fighting it. The patina of age becomes a design asset rather than a flaw to be covered up.

Reflective Finishes and Light Management

Open-plan apartments rely on light traveling across the entire floor area to maintain a unified feel. Reflective finishes multiply the effect of available daylight and reduce the need for artificial lighting during daytime hours. The choice of finishes directly affects how bright and spacious the apartment feels.

Selecting Reflective Materials by Surface

Different surfaces benefit from different levels of reflectivity:

• Ceilings: White matte or eggshell finishes reflect 80 to 90 percent of incident light without creating glare spots
• Walls: Semi-gloss or satin finishes offer good reflectivity while still hiding minor surface imperfections
• Floors: Light-colored wood, polished concrete, or light tile reflect more light than dark flooring. Gloss levels above 30 percent create noticeable reflections that make the room feel larger
• Furniture fronts: Glossy cabinet doors and wardrobe fronts act as secondary light sources, bouncing daylight toward the center of the room

Designing hidden pantry and office spaces behind cabinet doors is one way to maintain clean reflective surfaces while still providing the storage and work zones that an open-plan apartment needs. Concealing clutter behind glossy doors preserves the reflective quality of the room while keeping daily necessities accessible.

Open-plan apartment renovations demonstrate how removing interior walls, rethinking furniture as space dividers, and selecting reflective finishes can transform a compartmentalized space into a bright, flexible home. Adaptive reuse principles applied at larger scales follow the same logic: assessing the existing structure, removing obsolete divisions, and adding selective interventions that improve function without erasing the character of the original building.