A cylinder lock assembly for forming a cylinder lock for attachment in a panel, such as, for example, a door, includes an inner lock housing part, an outer lock housing part, at least one bridge, a carrier, an outer cylinder, an inner cylinder, a carrier coupling, an operating knob, and a set of lock housing extension parts. The cylinder lock includes a selection from the set of the lock housing extension parts connected with the inner lock housing part in order to obtain a desired length of the inner lock housing part with the lock housing extension parts. This desired length is adaptable by changing the number of lock housing extension parts within the selection and/or selecting a lock housing extension part of a desired thickness. The selection from the set of the lock housing extension parts is positioned between the inner lock housing part and the operating knob.