Comfort, accessibility, and functionality are the three principles guiding IPA - Architecture and more in the design of Space Tower. Completed in 2019 in one of Sofia's rapidly developing business districts, the project forms part of the studio's portfolio of public buildings.
Space Tower was designed in accordance with contemporary sustainable building standards. In 2021, the building received LEED Gold certification, recognizing its performance in areas including energy efficiency, resource use, indoor environmental quality, and environmental impact. Nature is subtly integrated into both the interior and exterior, contributing to a more comfortable workplace environment. The current IPA sustainability portfolio includes dedicated LEED certification and consulting services.
The building comprises eight above-ground floors and two underground levels accommodating parking and storage areas. Its substantial main volume creates spacious interiors and a sense of stability, while the exterior composition appears lighter and more dynamic. Openings in the facade and projecting volumes break down the overall mass and form balconies and loggias that provide direct access to outdoor space.
The loggias incorporate green walls, while glazed projecting volumes add another layer to the facade composition. The contrast between light facade panels and dark glazing emphasizes the building geometry and establishes a visual relationship between the exterior and interior.
The architectural design uses the facade as a load-bearing grid. This allows the interior to remain largely free of structural columns and shear walls, providing greater flexibility in the organization and future adaptation of the office spaces.
The entrance area has a professional yet welcoming character, with a predominantly light material and color palette. Furniture is positioned mainly around the perimeter, leaving the central area open and reinforcing the sense of spaciousness.
Each office floor is divided into four functionally independent zones that can operate separately or be combined depending on tenant requirements. This arrangement supports different workplace configurations and allows the building to accommodate companies of varying sizes and organizational models.
Additional amenities include sports facilities, restaurants, and spaces supporting the daily needs of employees. Space Tower therefore combines flexible office planning, a distinct architectural identity, and design solutions focused on occupant comfort and long-term sustainable performance.
