If you’re building a new home or development, you probably want to connect to one of our sewerage pipes so that we can take away your surface water and wastewater to treat, clean and return to the environment

Adopting proposed sewerage systems

If you are applying for a new sewer connection and the sewer is outside of your property boundary, or it serves more than one building, then you’ll need to ask us to enter an adoption agreement with you first before building

Diverting, altering or abandoning a sewer

If you want to improve or develop land that you own, and the public sewerage would likely stop or hinder your development, then you have the right to request its alteration or removal

Sewer requisitions

Sometimes your home or site has no way of draining to a public sewer due to the land between the site and the sewer being owned by a third party. If the third party won't give you access to the land, then you can also formally request (requisition) a public sewer and/or lateral drain from us

Planning applications

Drainage and water searches

If you want to apply for a water and drainage search on a property, you can apply using this application form. One of our team will then be in touch

Build over sewer self certification

A shorter process where you can 'self-certify' as long as you meet certain criteria in regard to how your work will protect our sewer

Build over sewer form

A more detailed process, needed for more complicated or higher risk work, that involves a technical assessment of your proposals by our dedicated team

Pre-planning application form

Tell us about your proposed development

Building Regulations form

This form is for local authorities and building control companies only

Map of Water Mains or Public Sewers

If you want to see whether your building or land contains any, then ask for your map here

Surveys

CCTV surveys

If you’d like to locate a sewer, you can apply for one of our CCTV surveys/sewer traces

Get in touch

We can point you to the right place.

Application advice

We can guide you through the process.

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Dŵr Cymru Cyf, a limited company registered in Wales No. 2366777. Registered office: Linea, Fortran Road, St Mellons, Cardiff, CF3 0LT.