Urban Apartment Renovation: Merging Heritage with Contemporary Living

Urban apartment renovation presents a unique intersection of preservation and progress, where the challenge of blending historical architecture with modern residential demands requires careful planning and creative problem-solving. In dense city centers, where space comes at a premium and building stock often dates back decades or even a century, property owners face the dual task of honoring original craftsmanship while adapting layouts to contemporary lifestyles. This article explores key strategies for renovating multi-floor urban apartments, drawing on proven principles from notable residential projects across Europe’s historic housing stock.

Combining Two Apartments into One: Structural and Spatial Considerations

One of the most ambitious renovation strategies in older urban buildings is the consolidation of two separate units into a single residence. Originally subdivided decades ago to meet different housing demands, many 1930s-era apartments were laid out with compartmentalized rooms and narrow circulation paths that no longer suit modern open-plan preferences. Reuniting adjacent units unlocks the potential for generous living spaces while retaining the building’s original perimeter walls and window placements.

When planning a unit combination, structural analysis comes first. Load-bearing walls must be identified and preserved or properly reinforced if removal is desired. In multi-story masonry buildings typical of the 1930s, internal walls may or may not be structural depending on the floor slab system. A structural engineer should evaluate every wall proposed for removal, paying close attention to the transfer of loads from upper floors. The goal is to create wide, open volumes without compromising the building’s structural integrity.

Circulation patterns also need rethinking. Where two separate apartments once had independent front doors and hallway systems, the merged unit requires a unified flow. This often means eliminating redundant corridors and reorienting the entry sequence to guide visitors naturally from the foyer into the main living area. The placement of the new staircase in multi-floor combinations becomes a pivotal design decision, as it must serve both levels while respecting existing slab openings and beam positions.

Working with Existing Floor Plans

The most successful unit combinations respect the existing structural grid rather than fighting it. Instead of demolishing everything and starting from scratch, designers working within existing floor plate constraints can selectively remove non-load-bearing partitions while preserving the rhythm of original windows and exterior walls. This approach saves on demolition and disposal costs while maintaining the architectural character that makes older apartments desirable.

• Map all load-bearing and non-load-bearing walls before creating the new floor plan.
• Identify redundant plumbing stacks that can be removed or rerouted.
• Verify ceiling heights are consistent between the two units; floor level differences as small as 10 cm can create tripping hazards at thresholds.
• Check for asbestos in pre-1980s building materials before any demolition begins.

Staircase Design as a Sculptural Element

In multi-floor apartment renovations, the staircase is far more than a utilitarian connection between levels. It becomes the vertical spine of the home and a natural visual anchor. A well-designed staircase can transform the experience of moving through a residence, creating visual drama while tying together disparate floor plates. This principle is well illustrated in projects where bold interior interventions elevate everyday living spaces into memorable environments.

Material Choices and Visual Weight

The materiality of a staircase significantly influences its visual impact. Steel and glass create a light, transparent appearance that allows light to pass through and maintains visual continuity between floors. Timber treads with a metal structure offer warmth while keeping the profile slender. Concrete or stone staircases read as heavy, grounded sculptural forms that anchor the space. The choice depends on the overall design language of the apartment and the desired relationship between solid and void.

Integration with Natural Light

Staircases positioned near existing windows can channel daylight deep into the floor plan. An open-riser design with glass balustrades minimizes visual obstruction, allowing light to wash down into lower levels. In darker urban contexts where adjacent buildings block direct sun, a lightwell or skylight above the stair void can transform a formerly dim circulation zone into a luminous, inviting space. The staircase void itself becomes a light shaft that benefits both levels.

Restoring Historic Finishes: Parquet, Plaster, and Proportions

One of the greatest assets of a 1930s apartment is its original craftsmanship. Herringbone parquet flooring, hand-troweled plaster walls, ornamental ceiling cornices, and plaster frames around doors and windows all contribute to a texture and patina that contemporary finishes struggle to replicate. The renovation approach that prioritizes restoration over replacement preserves this irreplaceable character.

Herringbone Parquet Restoration

Herringbone parquet consists of individual wooden slats laid in a repeating V-shaped pattern. Over decades of use, the surface finish wears away, gaps may open between slats, and individual pieces can become loose or damaged. Restoration begins with a thorough assessment: loose slats are re-glued, missing pieces are replaced with reclaimed timber of matching species and age, and the entire floor is sanded to remove the old finish and level the surface. A multi-coat application of hard-wax oil or polyurethane protects the wood while allowing its natural grain to show through.

The key challenge in restoring parquet is achieving an even sand across a large area without flattening the subtle undulations that give hand-laid floors their character. A skilled floor sander uses a combination of drum and edge sanders, working gradually through grits from coarse to fine. The final finish should be satin or matte to avoid a plastic-like appearance that would clash with the apartment’s vintage feel. As the demand for apartment living rises, preserving these authentic finishes adds lasting value.

Preserving Plaster Frames and Cornices

Plaster frames around doors, windows, and wall panels are signature features of 1930s interior architecture. These elements are typically formed in situ by skilled plasterers working with hand-molded profiles. During renovation, care must be taken not to damage these frames when removing old paint layers or when making structural alterations nearby. Where cracks or chips exist, patching with lime-based plaster rather than modern gypsum compounds ensures compatibility with the original material’s breathability and movement characteristics.

• Use chemical paint strippers rather than heat guns to avoid calcining the plaster beneath old paint.
• Repair cracks with lime putty and fine sand, matching the original profile using a plasterer’s template.
• Consider retaining original door frames even if doors are replaced, as the frames carry the period detailing.
• Document existing profiles with photographs and silicone molds before any removal work begins.

Spatial Illusion and Storage Strategies

Urban apartments, even after combining two units, rarely offer the generous proportions of suburban houses. Strategic design moves can make spaces feel significantly larger than their actual square footage. Mirrored surfaces, carefully planned sightlines, and integrated storage all contribute to a sense of expansiveness that belies the apartment’s true dimensions. These spatial strategies become increasingly important for maximizing livability.

Mirrored Wardrobes for Spatial Illusion

Full-height mirrored wardrobes serve a dual purpose in apartment interiors. They provide necessary storage for clothing and household items while using reflected imagery to visually double the perceived depth of a room. Placed opposite a window, a mirrored wardrobe reflects exterior light and views, bringing the outdoors deeper into the interior. The key to effective use is ensuring the mirror surfaces span from floor to ceiling without interruption, creating the illusion that the wall continues into another space beyond.

The placement of mirrored wardrobes should be considered early in the design process, as their visual impact depends on what they reflect. A mirrored wall facing a blank corridor merely duplicates the corridor, doing little to enhance the space. Positioned to reflect a window, a piece of art, or an interesting architectural feature, the same mirrored surface creates depth, interest, and a dynamic interplay between real and reflected space.

Integrated Storage Planning

Beyond mirrored wardrobes, a comprehensive storage strategy for apartment renovations considers age-in-place accessibility and long-term usability. Built-in shelving that aligns with wall recesses, under-stair storage drawers, and floor-to-ceiling cabinets along non-structural walls all maximize usable volume without consuming floor area. The goal is to make storage disappear into the architecture, leaving the living spaces uncluttered and visually calm.

Open-Concept Living with Exposed Mechanical Systems

The open-concept living area has become the defining layout of contemporary apartment design. By removing partitions between kitchen, dining, and living zones, a single large volume serves multiple functions while feeling spacious and connected. However, the open plan introduces a challenge: mechanical systems such as ductwork, piping, and electrical conduits that were once hidden inside walls and above dropped ceilings become visible when those enclosures are removed.

Rather than concealing these systems with new bulkheads that reduce ceiling height, many renovations now treat mechanical elements as deliberate design features. Exposed ductwork finished in a matte black or white paint reads as a sculptural ceiling installation. Plumbing risers encased in brass or stainless steel sleeves become vertical accents. Electrical conduit run in precise geometric patterns adds an industrial layer to the interior composition.

Planning the Open-Concept Layout

Successful open-concept planning requires careful zoning despite the absence of walls. The kitchen zone should be located near existing plumbing risers to minimize horizontal pipe runs. The dining zone benefits from proximity to both the kitchen for serving and the window wall for natural light. The living zone needs a clear sightline to the entry to create a welcoming arrival sequence.

Flooring continuity reinforces the sense of openness. The same herringbone parquet or large-format tile used throughout the combined living area visually unifies the space. Area rugs define individual zones without breaking the continuous floor plane. Ceiling treatments can also demarcate zones: a dropped ceiling section over the kitchen with integrated lighting distinguishes it from the higher ceiling over the living area.

Urban renovation projects often face logistics constraints that require carefully planned material handling and access strategies. Materials for the project must be brought in through existing circulation paths, and in tight city streets, delivery timing and equipment selection require advance coordination.

Light, Sightlines, and Connections Between Levels

In multi-floor apartment renovations, the relationship between levels determines the overall success of the design. Sightlines that connect the entry on one floor to the living space on another create anticipation and drama. A double-height volume at the stair landing, even if modest in scale, establishes a vertical connection that makes the apartment feel larger than the sum of its floor plates.

Window placement at both levels should be coordinated so that upper-floor windows are visible from lower-floor living areas, drawing the eye upward and creating a sense of vertical spaciousness. Interior glazing at the top of a stair landing can borrow light from a skylight or high window on the upper level, pushing daylight deeper into the lower floor. The same principle applies to interior balconies or mezzanine overlooks, which create visual exchange between family members on different levels.

• Align primary sightlines along the longest diagonal dimension of the combined floor plate.
• Place the stair void to maximize vertical light penetration from upper-level windows.
• Use glass balustrades or cable railings at upper landings to maintain visual openness.
• Coordinate light fixture placement across levels so they relate to each other compositionally.

Executing a complex multi-level renovation in a dense urban context demands careful sequencing and logistical planning for tight-site construction challenges. The integration of historical preservation, structural reorganization, and contemporary finishes requires a team that understands both the craft of restoration and the possibilities of modern design. When executed thoughtfully, the result is an apartment that honors its past while fully embracing the way we live today.