ADS are a London based fully certified drainage contractor covering the greater London area and the home counties. We specialise in CCTV Surveying of all kinds including Structural surveys, Home Buyers Drainage Surveys and of course Build-Over Survey (Pre & Post) which are required for home / property extensions. Our services are not limited to drain surveys, we also carry out works on behalf of large commercial companies which include office blocks, residential blocks and estates & building sites. Domestic clients are also catered for, drain surveys, drain cleaning, descaling and drain lining repairs are carried out across all sites as and when required. Hospitals, schools and colleges are among our extensive client lists as are historical sites and listed building. ADS provide services to architects, building surveyors, structural engineers and building controllers, being a fully certified contractor ensures our services are of the highest quality and we are recognised by blue chip companies and professional bodies. If your in need of a certified drainage contractor across London and the southeast then please contact us today for further information or look over our website, we are here to provide you with the professional services you require.