Tis paper deals with the question of how areas with diferent syntactic variability can be identifed. It uses data from the Syntactic Atlas of German-speaking Switzer- land (SADS) which uses multiple informants in each survey location. As a starting point the well-known doubling construction with the verb aafange ‘begin’ is used to illustrate how the diferent regions difer with respect to inter-personal varia- tion and how the diferent variants can be mapped in terms of predominance, i.e. to what extent they co-occur or compete with the other variants. As a quantitative measure, the intensity value of the dominant variant (i.e. the agreement rate be- tween those informants providing the dominant variant as their variant) is used as the basis to create a so-called “variation index”. Tis technique is applied to a larger set of SADS data, and the results are mapped onto the survey points indicating the syntactic variability for each location. To assess the validity of the method, sev- eral subgroups are created which turn out to correlate with the whole data set at a signifcant level. By performing a hot spot analysis, regional clusters of high/low syntactic variability can be identifed.