1947 Town and Country Planning Act

The Town and Country Planning Act 1947 (10 & 11 Geo. VI c. 51) was an Act of Parliament in the United Kingdom passed by the Labour government led by Clement Attlee. It came into effect on 1 July 1948, and along with the Town and Country Planning (Scotland) Act 1947 was the foundation of modern town and country planning in the United Kingdom.

Today the main statutes are the Town and Country Planning Act 1990 and the Planning and Compulsory Purchase Act 2004, supported by the National Planning Policy Framework (NPPF) introduced in 2012.

The Act established that planning permission was required for land development; ownership alone no longer conferred the right to develop the land. To control this, the Act reorganised the planning system from the 1,400 existing planning authorities to 145 (formed from county and borough councils), and required them all to prepare a comprehensive development plan.

These local authorities were given wide-ranging powers in addition to approval of planning proposals; they could carry out redevelopment of land themselves, or use compulsory purchase orders to buy land and lease it to private developers. They were also given powers to control outdoor advertising, and to preserve woodland or buildings of architectural or historic interest - the latter the beginning of the modern listed building system.

The Act provided that all development values were vested in the state, with £300,000,000 set aside for compensation of landowners. Any land would be purchased by a developer at its existing-use value; after permission to develop was granted, the developer would be assessed a "development charge" based on the difference between the initial price and the final value of the land. This charge was not payable in all cases - for example, cottages for agricultural workers, or limited enlargements to houses, were exempt. These charges were theoretically assessed by the Central Land Board, but it was intended that local district valuers would work with developers to agree a fair value; it was reported in 1949 that "where [a charge] is payable, the amount has been agreed by the developer in over 95 per cent of the cases". Where the landowner refused to sell land at the "undeveloped" price, the Central Land Board had authority to purchase it compulsorily and resell it to the developer.

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