In recent times Home Buyers Drainage Surveys have become common place across the UK and Ireland.Building surveyors now recognise the true importance of these surveys and advise clients buying domestic homes and commercial buildings to ensure that they have a drain survey carried out by a fully certified drainage surveyor. Drain surveys should never be considered an additional expense, it is now considered to be one of the most valuable parts of the surveying process and is not to be over looked. Defective drainage systems are responsible for major structural defects in buildings, subsidence and can be avoided if located and corrected in time.