Federal Act
on the Amendment of the Swiss Civil Code
(Part Five: The Code of Obligations)

¹ The land­lord may at any time in­crease the rent with ef­fect from the next ter­min­a­tion date. He must give no­tice of and reas­ons for the rent in­crease at least ten days be­fore the be­gin­ning of the no­tice peri­od for ter­min­a­tion us­ing a form ap­proved by the can­ton.

² The rent in­crease is void where:

a.

it is not com­mu­nic­ated us­ing the pre­scribed form;

b.

no reas­ons are giv­en;

c.

no­tice of the in­crease is ac­com­pan­ied by no­tice to ter­min­ate or a threat of ter­min­a­tion.

³ Para­graphs 1 and 2 also ap­ply where the land­lord in­tends to make oth­er uni­lat­er­al amend­ments to the lease to the det­ri­ment of the ten­ant, for ex­ample by re­du­cing the ser­vices provided or adding new ac­cess­ory charges.

⁴ No­tice of a rent in­crease and oth­er uni­lat­er­al con­tract amend­ments may be giv­en by ap­pend­ing a sig­na­ture re­pro­duced by mech­an­ic­al means to the pre­scribed form.¹⁰²

⁵ In the case of a rent in­crease in ac­cord­ance with an agree­ment un­der Art­icle 269c, it is suf­fi­cient that no­tice be giv­en in writ­ing.¹⁰³