Blog · Guides for investors
What to know before transforming a building.
Planning rules, permits, costs and timelines in Barcelona and Catalonia, explained by the architects who handle them every week.
Changing a building's use: what to consider before you invest
The six questions to answer before changing the use of a building in Barcelona: planning, rules for the new use, structure, services, timelines and returns.
Read → Design and permits · November 1, 2026Listed building in Barcelona: what to do before buying or transforming it
What it means for a building to be listed, what can be changed, how the heritage report works and how to turn protection into value.
Read → Design and permits · October 28, 2026Converting a building to residential use in Barcelona: requirements and timelines
What it takes to turn offices, commercial premises or facilities into homes in Barcelona: planning, density, habitability, permits and realistic timelines.
Read → Design and permits · October 28, 2026Subdividing an apartment into several in Barcelona: requirements and returns
When a large apartment in Barcelona can be split into several, which planning and habitability requirements apply, and how to work out whether it pays off.
Read → Feasibility · October 28, 2026Technical due diligence on a building in Barcelona: what to check before you buy
What technical, planning and heritage due diligence on a Barcelona building covers, which documents to request and how to turn it into a buying decision.
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