Is it illegal to change the balcony into a bathroom?

Legal analysis: it is illegal to change the balcony into a bathroom. It belongs to illegal reconstruction, and the behavior of illegal reconstruction must be restored to its original state. Refuses to rectify, the property company can carry out relevant administrative treatment on the owners according to the property service contract. According to the relevant laws and regulations of our country, architectural decoration should be safe, applicable, environment-optimized, economical and reasonable for building owners, users, architectural decoration design units, construction units, quality and safety supervision units, construction supervision units and housing safety appraisal units, and conform to the relevant regulations and standards of urban planning, fire protection, power supply and environmental protection.

Legal basis: Article 4 of the Regulations on the Management of Building Decoration shall be safe, applicable, environmentally friendly, economical and reasonable, and conform to the relevant provisions and standards of urban planning, fire protection, power supply and environmental protection.