The three-dimensional transformation without change of scale is one of methods for geodetic description of building deformations. Object displacement parameters (rotation angles and components of translation vector) and values of reduced displacement vectors are delivered as a result of fitting two sets of check points (from initial survey and check one). Usually these calculations are done with the help of the least squares method. This method is very sensitive to influence of outliers. Considerable local deformations of object can cause distortion of obtained results. In the paper the possibility of the using for geodetic description of building deformation five robust estimation methods is presented. Results of fit obtained in this way are more reliable. This fact is very important for correct assessment of construction safety. This problem is illustrated by simulated building object.

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