Attic Extension Renovation in Ljubljana by ARHITEKTURA

Architects: Arhitektura

In the suburban landscapes of post-war Ljubljana, many homeowners once drew inspiration from grand city villas when designing their suburban residences. Unlike the original urban villas, however, these houses prioritized simplicity over luxury, with modest materials and compact, fragmented floor plans. Rooms were typically small and disconnected, arranged around a central staircase: a layout that no longer meets the expectations of contemporary homeowners who prefer open, airy, and multifunctional living spaces.

This challenge is common in residential renovation projects, where clients seek to modernize while preserving existing structures. In the case of this Ljubljana villa, the client wanted a more spacious home but also maintained a strong commitment to sustainability. Understanding that “the greenest building is the one that is already built,” the client favored renovation over demolition, a decision that is both environmentally responsible and cost-effective.

Innovative Attic Transformation

ARHITEKTURA’s solution brilliantly balances modern design with respect for the existing structure. Rather than removing the original villa, the architects preserved both the ground and upper floors, allocating the smaller, traditional rooms to essential household functions. The key transformation was the attic, previously unused, which was reimagined as a modern loft-style space.

The newly designed attic spans a single-pitch roof, creating a large, open-plan environment that maximizes natural light and provides a sense of spaciousness. A southern winter garden extends the living area, offering panoramic views of the surrounding greenery while ensuring privacy from the street. Additional windows on the east and north facades provide intimate views of the quiet suburban surroundings, seamlessly blending exterior and interior experiences.

Materials and Architectural Expression

Despite its modern intervention, the attic harmonizes with the original villa. Constructed using cross-laminated timber (CLT) and featuring a darker metal facade, the new addition subtly stands out while maintaining a visual connection to the existing building. Its compact design acts as a discreet architectural accent, complementing the villa and engaging passersby along Ljubljana’s green promenade.

All photographs are works of Miran Kambič