Metropolitan Buildings Office

The Metropolitan Buildings Office (MBO) was established in 1844 under the Metropolitan Buildings Act and was the first statutory body with responsibility for building regulation for the whole of the Metropolitan area. Revision of building regulation was long overdue. Between 1801 and 1841 the population of London had increased from under a million to over two million. The built up area had spread well beyond the boundaries set by the London Building Act of 1774.

Building methods and uses had also changed in the period, and there was a pressing need to prevent building developments which were undesirable for social or sanitary reasons - even the most conservative were beginning to realise that accumulations of untreated sewage under and around dwellings in crowded streets and alleys were a menace to health.

The 1844 Metropolitan Buildings Act was concerned with the security and thickness of party walls and the use of fire-resistant materials. Buildings were classified into three types - dwelling houses, warehouses and public buildings, which included churches, schools and theatres, and detailed provisions were set out for each.

In addition it established that:

• No new streets should be formed less than 40 feet wide and buildings adjacent to them should be no higher than the width of the street.

• New dwelling houses were to have an area of at least 10 square feet at the rear unless the windows on the other three sides gave light and air to all the rooms.

• No cellar or underground room was to be used for human habitation unless it had a window, a fireplace and drainage.

• Privies and closets were to be properly enclosed and screened from public view and drains were to be provided in all new houses.

• Noxious and dangerous businesses were not to be set up within 50 feet of other buildings.

As an organisation the MBO was administratively very complicated - The Lord Mayor, the Justices, the Secretary of State and the Commissioners of Works all had a say in the appointment of officers. There was apparently much friction between the Registrar and the Official Referees, and officers were expected to accomplish far more than their powers permitted. Almost from the beginning private builders, surveyors and others were clamouring for revision of the Act. In 1855 the MBO was abolished and a new body, the Metropolitan Board of Works, was set up in its place.