Lease contracts sometimes run to more than a hundred pages - and the legal traps hidden in them can be the source of many problems for those unfamiliar with the law. On the other hand, they can help an owner increase the value of a property. Article 685.1 of the civil code was incorporated into Polish law in 2011 as one of the provisions of the tenant protection act. The regulation is mainly addressed to the inheritors of tenement flats and was intended to help them increase unprofitable rent rates which have been losing value for years. The idea was to help those inheriting dilapidated residential buildings raise funds for renovations. The amendment to the civil code that came into force in April 2003 limited the application of the article only to lease contracts for residential units that had been concluded for an indefinite period of time. However, in December 2004, an act to amend the act on the protection of tenants within a borough's purview, which also amended the civil code as