The OIBT check, or ordinance check on low voltage installations, is an electrical check which must be carried out as part of a real estate acquisition if it has not been carried out in the last 5 years. It consists of checking the conformity of the electrical installations in the apartment or house, in order to ensure their proper functioning and safety. This inspection is generally the responsibility of the buyer and compliance is generally the responsibility of the seller, although there are no specific rules or laws on this subject. The cost of the ITTO inspection can vary between approximately CHF 200.- and 500.-, while the cost of any adaptations will depend on the work to be carried out.