This requires careful assessment of the individual case. Not all irregularities have the same effects, and not all prevent a sale.
A planning irregularity is a difference between the property’s actual condition and the municipal building authorisations. Examples include work without the required permission or departures from approved plans, such as unauthorised extensions, enclosed verandas or alterations requiring prior approval.
Presidential Decree 380 of 6 June 2001, the Consolidated Building Act, distinguishes different types of unlawful development and their consequences. Some irregularities can be regularised through specific procedures if statutory requirements are satisfied; others cannot and may have serious consequences.
Irregularities can significantly affect a sale. A buyer may withdraw or require regularisation first. A bank may refuse a mortgage because the property serving as security lacks the required regularity. The notary may also need further checks or documents before signing.
Advance review of planning documents is therefore particularly important. Examining building permissions, actual conditions and technical records can reveal difficulties before negotiations and, where permitted, allow regularisation, reducing delays, disputes and completion problems.
Qualified professionals should be consulted before buying or selling. Preliminary checks are a fundamental safeguard for the transaction and everyone’s interests.