Always build with a license because the threat of demolition hangs over 100,000 Spanish properties built without planning permission, or with an invalid building license, according to a recent article in the Spanish daily ‘El Mundo’. Calls for a tougher line to be taken with illegally built homes in Spain are increasing, and Antonio Vercher – the head official in charge of real estate and environmental investigations – is quoted as saying that, “we need to rethink this issue, and find effective new solutions.”