In Calpe the typical property is not an apartment but a detached home: villas and chalets on their own plot, many of them built and altered in stages over decades. That calls for a check rarely needed on a flat: comparing the surface area and description held by the Land Registry against the Cadastre and against what is actually standing. Undeclared pools, extensions or enclosed porches are common, and putting them right after the purchase falls to the new owner.
The town also has a coastline strongly shaped by the Penon de Ifach and its protected surroundings. On plots close to the shore you have to bear in mind the protection easement imposed by Spanish coastal legislation, which limits what can be built or extended. If you intend to renovate or build, confirm with the town hall what the planning rules allow before closing the purchase, not afterwards.
One practical detail that catches foreign buyers out: the municipality appears under two names, Calp and Calpe, and official paperwork — Land Registry, Cadastre, municipal bills — may use either form. It is not an error and does not affect the validity of the documents, but it is worth knowing when cross-checking deeds, nota simple extracts and IBI receipts.