The Building Survey ... 

The building survey (sometimes called structural survey) is the most comprehensive - and the most costly - type of survey. It is suitable for any building, but is especially recommended for older buildings (75 years and upwards); those constructed out of unconventional materials such as timber or thatch; and properties which have had lots of alterations or extensions, or which you intend to alter or renovate.

The surveyor will check the property thoroughly, looking at everything that is visible or easily accessible to examine the soundness of the structure, its general condition and all major or minor faults. More specialist surveys can also be carried out on aspects such as foundations, damp proofing, or tree roots, either by a specialist within the firm of surveyors or by an independent specialist surveyo

The report you receive will be extremely thorough and very long, as surveyors are legally obliged to inform you of all the findings of the survey. Don't necessarily be put off if it seems that endless defects are listed - every house has some defects and surveyors tend to show the worst-case scenario for anything they discover. You should be provided with a list of prices for repairs and maintenance work, which will also tend to over- rather than under-estimate prices.

A full structural survey normally takes much longer than the one or two hours required for the homebuyer's report. The survey report can also take a long time to produce, so this is a much lengthier process than for a homebuyer's report. You will probably have to wait up to two weeks after the inspection for the report, for which there is no standardised reporting format.