QBD 11 January 1991. Appeal by Cambridge CC (C) under the Town and Country Planning Act 1971 s246 against the Inspector`s decision (acting on behalf of the SOS Environment) allowing appeals by the owners against two enforcement notices served by C over breaches of planning control over the demolition of two houses. Appeal based on question as to whether the demolition of two houses constituted development . The properties had been purchased by developers of an adjoining office block to provide additional carparking. After temporary planning permission to use the houses as site offices had run out, the developers began to demolish them. Enforcement notices were issued by C. Developers appealed to SOS. The Inspector quashed the notices concluding after consulting several authorities that demolition is not part of a building operation and did not require planning permission. HC held that demolition in this case was a building operation and therefore, demolition constituted development.