Sustainable architecture is important to minimize negative impact of building. In this paper we concentrate on the problem from people with disability point of view. For them one of must important factors of sustainable architecture in public space is the problem connected with architectural barriers. In presented paper we conducted an analysis of hidden factors of architectural barriers on example of municipal office in Sosnowiec in southern part of Poland. During the research we analyzed the needs of persons with disabilities (perceived quality) and their assessment in terms of the level of quality of services provided by the municipal offices. We analyzed twenty fourth variables connected with architectural barriers in the municipal office and its neighborhood. We analyzed following variables: office location (easy to reach), a sufficient number of parking spaces, Z3 - parking spaces for the disabled near the entrance of the office, a clear marking of parking spaces for the disabled, watch for unauthorized persons occupying seats for the disabled, facilities for disabled people in the office, elevators for disabled guests, toilets suitable for disabled guests, handrails of the stairs, a system of ramps and ramps for the disabled, the doors have a width that allows entry wheelchair, anti-slip floor, equal level thresholds and floors, pavement and curbs around the office adapted for the disabled, website provides information for people with disabilities, website readable for people with visual disabilities, officials are turning to people with hearing difficulties by means of a suitable device, officials are talking with a person of hearing in a separate room, the office's employee who knew sign language, officials can serve the customers with guide dog, the office is equipped with a special frame to allow signing a document, the visually handicapped person allows the presence of a trusted person who acquainted her with the content of signed documents, the city council does not contain architectural barriers hindering the movement of physically disabled person, an overall assessment of architectural barriers at the office. Next we conducted factor analysis to identify main hidden factors of architectural barriers.