Project

Planas i Casals – Triomf

- Badalona, Spain

A sensitive rehabilitation of early 20th-century houses in Badalona, transforming them into a modern residential building while preserving historical elements.

Three-story beige residential building with balconies and vertical windows on a street corner.

A corner view of a three-story residential building with a beige facade and multiple small balconies. The building features vertical windows and is situated on a street corner.

Story

Planas i Casals – Triomf

Rehabilitating History in Badalona The Planas i Casals – Triomf project by Sau taller d’Arquitectura is a thoughtful transformation of two early 20th-century semi-detached houses into a contemporary residential building. Located at the intersection of Triomf and Planas i Casals streets in Badalona, the project introduces seven dwellings across three floors, harmonizing with the urban fabric while respecting the site's historical memory. The design retains key architectural elements such as facades and structural walls, reinforced by a new steel framework. This structural intervention enhances its resilience against horizontal loads. The strategic placement of the staircase along the party wall optimizes natural light and ventilation, while a central service core organizes technical elements, offering flexibility in the interior layout. The facade's vertical proportions are preserved, with new openings ensuring ample light and ventilation. Contemporary steel balconies provide outdoor spaces, adding dynamic elements to the otherwise disciplined facade. Inside, the exposed white-painted steel structure contrasts with original ceramic walls, creating a luminous and textured environment. The interplay of white surfaces and wooden elements in floors and fixtures achieves a balance between historical preservation and modern living.

Design Highlights

Preservation of original facades and structural walls Reinforcement with steel framework and micropiling Central service core for technical elements New facade openings maintaining historical proportions Contemporary steel balconies for outdoor access Exposed white-painted steel structure inside Use of white and wood for interior finishes

Key Facts

Key Aspect Detail
Architect Sau taller d’Arquitectura
Location Badalona, Spain
Program Residential
Structural System Steel framework with composite decking
Materials Steel, wood, ceramic masonry

Technical summary

Updated 3/17/2026

Finishes

  • facade: The facade walls are finished with a small cornice, maintaining the proportions and dimensions of the original architecture.
  • interior: Exposed steel structure painted white, adding texture and depth to the ceilings.

Materials

  • steel — Interior structural framework and exposed ceiling beams.
  • wood — Flooring, window and balcony door frames, and certain kitchen and bathroom elements.
  • ceramic masonry — Original structural walls.

Construction / Systems

  • foundation: Reinforced with micropiling.
  • structural: Interior steel structure with HEB and IPE profiles, composite steel decking.

Products

  • Not specified

Palette / Lighting

  • Colors: white, wood tones
  • Lighting: Natural light emphasized through large windows and open facades.

Images

Three-story beige residential building with balconies and vertical windows on a street corner.
Corner view of a beige residential building with wooden-framed windows and metal balconies, with a cyclist in motion in the foreground.
Exterior view of a three-story residential building with vertical windows and small balconies.
Exterior view of a modern residential building with symmetrical windows and balconies.
Corner view of a residential building with vertical windows and small balconies, surrounded by parked cars and colorful neighboring buildings.
Minimalist interior with wooden chair, large windows, corrugated ceiling, and light wooden flooring.
Modern interior with white walls, exposed beams, wooden flooring, and a kitchenette with shelves.
Room interior with white walls, exposed steel ceiling, and wooden framed windows and doors.
Interior view of a modern space with white exposed steel ceiling, wooden floor, minimalist kitchen, and large windows with curtains.
Interior view of a modern kitchen with white cabinets, wooden flooring, and an exposed steel ceiling structure.
Modern kitchen interior with white cabinets, wooden shelves, light wood floor, and exposed white steel beams on the ceiling.
Minimalist interior with white staircase, exposed steel beams, and wooden flooring.
Interior of a modern residential space with a white steel staircase, exposed ceiling beams, wooden flooring, and large windows with curtains.
Minimalist interior with white staircase, exposed steel beams, wooden floor, and modern chair.
Interior hallway with a staircase, exposed brick wall, and ceiling lights.
White metal staircase with wooden steps against an exposed brick wall.
Floor plan of a residential building with detailed room layouts and furniture placement.
Detailed architectural section drawing showing construction elements and materials.
Detailed architectural section drawing showing construction elements like flooring, insulation, and structural components.
Architectural diagram featuring a cutaway view of a building with structural elements and floor plans labeled.

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