Part of the National Archives website, the Valuation Office Survey was carried out between 1910 and 1915 to assess all site values in the UK for taxation purposes. The catalogue contains descriptions of nearly 50,000 Valuation Office Survey maps. When searching you need to have an idea of where your ancestor was living, such as an address from the 1911 census.
The maps serve as the means of reference to more than 95,000 Valuation Office Field Books which contain descriptions of more than 9 million individual houses, farms and other properties, detailing the use and value of lands and buildings, and naming their owners and occupiers. Valuation Office Field Books can only be viewed at The National Archives.