The CON29DW Commercial – 15 years being clearly essential

18 August 2025

From its launch 15 years ago as the Commercial Drainage and Water Enquiry (Commercial DW) in 2010, the Commercial form of the CON29DW has been continuously ­ improved and updated to reflect an ever-changing water industry and legislative framework. From this foundation, DWSN worked with The Law Society, to launch the CON29DW Commercial in 2021.

Today, the CON29DW Commercial enquiry is specifically designed for those purchasing or leasing land or commercial property. It comprises 27 standard questions providing comprehensive information regarding water and sewerage services and infrastructure assets. It confirms that a property is connected to the mains supply and drainage, it also includes, where possible, key information regarding trade effluent consent licenses, and wayleaves and easements. The CON29DW Commercial mitigates risk and provides peace of mind for commercial property professionals and their advisers, complementing their own due diligence.

‘Commercial property’ means land or buildings used or proposed to be used for commercial activities and includes offices, retail units, working farms, warehousing, development sites and commercial buildings used or intended to be used as dwellings.

The CON29DW Commercial is compiled by specialist teams who expertly interpret and verify comprehensive drainage and water data, checking and reviewing each report, then passing the data through various quality and review stages, before it’s delivered to customers.

CON29DW producers have made multi-million pound investments in this service in order to improve product quality and speed of response. Today, over 95% of Commercial reports are delivered within five working days.

To find out more about the CON29DW visit the DWSN YouTube channel for recordings from recent webinar, including CON29DW Commercial: Everything you need to know. Find the CON29DW Commercial provider for addresses in your area by using the postcode look-up at www.con29dw.co.uk .

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