Letter received from Gold Coast City council with a 'show cause' about non-compliant building works on a residential house I bought about 16 years ago. It relates to the absence of guttering on an enclosed patio that was attached to the building when I purchased. The building report at the time stated that all structures were compliant. If the structure was in fact compliant at the time of purchase, am I still be obliged to rectify this? Any suggestions on the best course of action?