In accordance with the provisions of regulatory enactments of the Republic of Latvia, the law obliges the local governments to establish a Building Board within their administrative territory or, in co-operation with other local governments to develop joint Building Boards and ensure the resources required for the operation of a Building Board, thus providing for the legality of construction process in their administrative territory. Building Board is an institution of special status, established at the local government and it is one of the municipal structures that has been delegated to control the legality of the building process in the administrative territory of local government, therefore, the Building Board is an intermediate administration institution that is bound by external regulatory enactments that are binding on derivative public entity, and, therefore the administrative procedure is binding on them as well.The objective of the article is to study the competence of Building Board in the elimination of the consequences of arbitrary building by determining the principal functions of the Building Board, signs of the detection of the arbitrary building and the competence of the personnel of the Building Board and the competences of the Building Board personnel in the review of arbitrary construction cases. The article evaluates the administrative acts of the Building Board that impose the duty of the addressee of the administrative act to eliminate the consequences of arbitrary building.