Common room

from Wikipedia, the free encyclopedia

The lounge is generally considered a space within dwellings or buildings suitable for a longer stay of people. Whether a room has this suitability essentially depends on requirements with regard to room size, room height , lighting and ventilation . In order to guarantee the safety and health of people who work and / or live in common rooms, the state building regulations define certain minimum requirements.


According to the case law, a room should already be regarded as a lounge if it is objectively suitable for a not very short stay, even if it is only during the day and in the warm season.

In § 2 of the Model Building Regulations (MBO), common rooms are defined as rooms that are intended or suitable for permanent residence by people. According to § 47 MBO, they must have a clear room height of at least 2.50 m. This does not apply to common rooms in residential buildings of building classes 1 and 2 and to common rooms in the attic. In order for them to be adequately ventilated and exposed to daylight, the structural dimensions of all window openings in a room must be at least 1/8 or 1/10 of the net area of ​​the room including the net area of ​​glazed porches and loggias , depending on the federal state .

Common rooms include, for example, living rooms, bedrooms and kitchens as well as offices and sales rooms. Work or sports rooms are also included if they are used more than “rarely and for a short time”. In contrast, storage, storage, sanitary and other rooms with ancillary functions as well as corridors and stairwells are not lounges.

Far-reaching legal consequences are associated with the definition of the term “lounge”. The most important one is certainly the requirement for two escape routes on each floor in which there are lounges, e.g. B. in Section 17 (1) of the State Building Regulations (BauO) NRW: “For each usage unit, two escape routes must be available on each floor with a lounge; the escape routes may lead over a common necessary corridor within one floor. "

Further regulations, for example in the Berlin building regulations

  • According to Section 2, Paragraph 4, No. 1, Paragraph 3, Sentence 2, high-rise buildings are buildings in which the floor of at least one common room is more than 22 m above the specified surface area;
  • According to Section 33 (1), every usage unit with common rooms on every floor must be accessible via at least 2 independent escape routes (necessary stairs, a point that can be reached with rescue equipment from the fire brigade)
  • According to Section 29, Paragraph 2, partition walls between common rooms and generally unheated rooms must be heat-insulating, provided the unheated rooms are not located within the apartment or are part of the common rooms; Walls between common rooms and stairwells and passageways must also be thermally insulating
  • According to Section 28 (3), special requirements can be placed on roofs that close off common rooms because of fire protection
  • According to Section 32, Paragraph 2, the stairwell of at least one necessary staircase or an exit to the outside must be accessible from every point in the lounge at a maximum distance of 35 m
  • According to Section 34, Paragraph 6, elevators designed to accommodate wheelchairs ... should have stops on all floors with common rooms
  • According to Section 39 (1), buildings with common rooms may only be erected if the supply of drinking water is permanently secured
  • According to Section 41 (4), sewage treatment plants, sewage collection pits and ventilation systems should be at least 5 m away from openings to lounges
  • According to Section 42 (1), waste shafts are to be installed outside of common rooms
  • According to Section 43, systems for solid waste should be at least 5 m away from openings in lounges
  • According to Section 44 (1), common rooms must have a sufficient floor space for their use and a clear height of at least 2.50 m
  • According to Section 44 (2), common rooms must have vertical windows that lead directly to the outside and are of such a number and quality that the rooms can be sufficiently illuminated and ventilated with daylight
  • According to Section 46, Paragraph 1, lounges in KG are permitted if the premises that adjoin their outer walls with necessary windows are no more than 0.5 m above the floor in front of the necessary windows at a distance and width sufficient for lighting with daylight of the common rooms
  • According to Section 46, Paragraph 4, lounges in the attic must have a clearance height of at least 2.30 m over at least 50% of the floor area
  • According to Section 56, Paragraph 1, a building is one of the projects that do not require a permit if it has no common rooms ... (and BRI <30 m³)

Important: Section 44 also distinguishes between “common rooms not used for living”.

Building planning law

The term “lounge” is also used in building planning law, where regulations can be found in § 20 and § 21 of the Building Utilization Ordinance .

Web links

  • Senate Department for Urban Development Berlin: Building Regulations for Berlin (BauO Bln). (PDF, 271 kB) of September 29, 2005 (GVBl, p. 495), last amended by law of June 29, 2011 (GVBl, p. 315, entered into force on July 10, 2011). September 29, 2005, accessed September 10, 2011 .
Wiktionary: Lounge  - explanations of meanings, word origins, synonyms, translations

See also

Individual evidence

  1. Wormuth Schneider: Building encyclopedia . Bauwerk Verlag, Berlin 2009, ISBN 978-3-89932-159-3 , p. 15 .
  2. BayVGH, judgment of July 5, 1982, Az.BRS 39 No. 147
  4. ^ Dietmar Grütze: Building Lexicon . Carl Hanser Verlag, Munich 2007, ISBN 3-446-40472-4 , p. 21 .