LEJTŐ STREET - APARTMENT BUILDINGS
About the project
Design and construction of a twelve-unit residential complex comprising two building volumes on a steeply sloping site — exposed concrete basement level, roof terraces, reinforced concrete structure with non-conventional geometry, and underground parking.
Brief and context The implantation of the two-volume, twelve-unit complex deliberately departs from the compact block typology prevalent in the area — the scale of the intervention is calibrated to the logic of the surrounding single and two-family residential fabric. Each building volume is articulated by a staircore placed along its axis, expressed as an outdoor corridor: not merely a circulation element, but a strong spatial and visual separator that frames views between the two buildings. The exterior spaces generated by the volumetric offsets each carry a distinct character — private and communal gardens, open views and intimacy in equal measure. Taking advantage of the site's topography, the lower building accommodates an underground garage and storage spaces beneath its footprint.
Apartment organisation Every apartment has its own direct connection to a garden or a roof terrace. In the duplex units, communal living spaces and bedrooms are distributed across separate levels — the vertical separation reinforcing privacy within the dwelling.
Material language The facade treatment is restrained: structured off-white render forms the base texture, complemented by timber cladding along the terrace lines. The character of the buildings is defined not by formal variety, but by the consistent application of a limited material palette.
BILT's roles on this project
Full design coordination Architectural and interior design concept, supported by technically detailed construction drawings across structural, mechanical, and electrical disciplines.
Structural construction Executed by BILT's own specialist team. The complex geometry and exposed concrete surfaces are delivered under full internal control.
Project management Construction management through to turnkey handover. Execution contracts and material procurement were concluded directly with the client.
Challenges
Steep slope, constrained site Large volumes of excavation on sloping terrain, where securing an adequate working platform was in itself a complex design problem, given the limited space available for embankments.
Exposed concrete structure with non-conventional geometry Non-standard wall angles, slab level changes, fully exposed concrete basement — walls and slabs alike.
No remediation after the fact: Exposed concrete tolerates no errors.
Non-standard waterproofing details The complex geometry and structural penetrations generated atypical waterproofing junctions — each requiring specific technical solutions at both design and construction stage.
Complex architectural details Custom metalwork, accessible roof terrace, timber-clad facade walls, the junction between prefabricated stair elements and the monolithic reinforced concrete structure — each requiring an individual solution.
Landscaping across significant level changes Coordination of multiple retaining walls with one another and with utility networks — water, stormwater, sewage — on a steep, fragmented terrain.
Works completed
- Full design coordination: architecture, interior design, structures, mechanical and electrical engineering, building automation
- Foundations and excavation
- Reinforced concrete structure
- Bituminous waterproofing
- Drainage
- Masonry
- Landscape works
How we worked
Designer and contractor in one With weekly technical coordination. Structural junctions and technical issues are resolved in-house, on a weekly basis. No waiting on an external designer — decisions are made quickly, construction does not stop.
Structural construction with an in-house team Exposed concrete surfaces and non-conventional geometry are not outsourced — they are executed by BILT's own specialist team, with direct control over quality and construction pace.
Direct leadership, no intermediaries BILT's management participates personally in weekly site inspections — technical and quality decisions are not delegated, but made directly at leadership level.
Annual risk-based programme, in BILT's own ERP At project outset, the entire construction process was mapped in advance: critical work phases and potential delay points were identified. This enabled early reservation of long-lead materials and specialist teams with limited availability.
Weekly operational scheduling The annual programme alone is not sufficient — actual progress is tracked weekly, with immediate intervention whenever a work phase begins to slip.
Weekly quality control In accordance with the BILT Quality Management System. Every work process is verified against a checklist and documented in the ERP.
Weekly coordination meeting with the investor
Monthly client report: Schedule and completion status, financial status, record of variation works, technical issues and resolutions, plans for the coming period.