Pools, porches or added floors without a licence are very common. Before buying, you must know whether they are legalisable or a problem.
Due Diligence · Updated October 2026 · 6 min read
Many houses have works, extensions or structures without a licence (an extra floor, a porch, a pool, a mezzanine). When buying, it is essential to know their planning situation.
We include it in the due diligence: we cross-check licences, Cadastre, Registry and planning before you sign.
Yes, but first you must know whether they are legalisable, time-barred (out of planning) or at risk of proceedings. Planning liability passes to the buyer.
That the works do not comply with planning but the Administration's power to require demolition has expired. They can be kept with limitations, though each case should be checked.
Sometimes yes, through a legalisation if the works comply with current regulations; other times no, and demolition could be ordered. Each case must be studied before buying.
Discrepancies with the Registry and the Cadastre, inability to finance or sell normally, penalties and even restoration orders. Prior planning due diligence is advisable.
By comparing the physical reality with the registry and cadastral description and requesting planning information from the City Council. We verify it before the purchase.
We analyse the planning situation and the risk of unpermitted works before you buy.
