The architecture festival 48h Open House Barcelona takes place on 24 and 25 October 2026 . According to the organisers, 217 buildings will open to visitors over the two days. The programme covers Barcelona and the neighbouring towns of Badalona, L'Hospitalet de Llobregat, Sant Joan Despí, Vilassar de Dalt and Sitges.
The organisers describe the event as a weekend of open doors, when public buildings, private homes, industrial sites and infrastructure offer insights into architecture, use and history. According to the information provided, admission is generally free. Some sites require a time slot or advance booking; the organisers will provide details beforehand. Tours and short-format activities aim to make spaces that are usually inaccessible easier to visit.
The focus is on the relationship between the built environment and urban society: according to the festival, owners, users and professionals in architecture and construction explain aspects of design, building history, materials and adaptation. The aim is to showcase the diversity of the existing building stock and encourage discussion of design, conservation and contemporary needs. The selection includes historic and contemporary examples, among them administrative and educational buildings, as well as repurposed industrial sites and infrastructure in the metropolitan region’s port and coastal areas.
The Open House format is widespread internationally; in Barcelona it has been held for years as 48h Open House Barcelona, each time on an autumn weekend. For 2026, the organisers highlight its expansion to several municipalities in the surrounding area. They also point to logistical requirements: managing visitor flows, accessibility and protecting sensitive buildings are integral to planning. Visitor numbers are estimates from festival statements and should be understood as such.
The organisers advise visitors to go to popular sites early in the day and allow extra time for queues. Anyone planning to visit specific buildings should check whether booking is required or fixed time slots apply. The organisers will provide information about arrangements and any last-minute changes during the weekend in advance.
The event takes place a few weeks before the end of the season for many outdoor cultural activities. Tourism and cultural organisations in the participating cities expect visitor numbers to rise. According to the municipalities, the weekend will be linked to local events, such as information sessions on urban development or the care of built heritage.
Editor: Celestina Fuentes (Article created with AI assistance).