Sewer adoptions

If you'd like to put forward newly constructed or existing sewers and associated assets for adoption, the Sewer Adoptions team will be happy to guide you through the process.

Rippling water

If you would like to put forward newly constructed or existing sewers and associated assets for adoption, the Sewer Adoptions team will be happy to guide you through the process. We will ensure that the assets proposed are designed and constructed to meet the required standards to allow them to be adopted into Yorkshire Water as public assets. We will take ownership of the network and assets from the developer who constructed and installed it.

Yorkshire Water is the Statutory Sewerage Undertaker for the Yorkshire Region. However, if you wish you can approach a New Appointment and Variation (NAV) to adopt your sewer network. For further details, please refer to the Ofwat website.

Water companies in England have implemented the Sewerage Sector Guidance as a requirement of OFWAT’s Code for Adoption (2020). All sites put forward for adoption must now be designed and constructed in accordance with the Design and Construction Guidance, Local Practices and Technical Standards contained within the Code for Adoption (2020).

The biggest change is the inclusion of guidance as to which sustainable drainage systems (“SUDS”) are capable of adoption as sewers. Here at Yorkshire Water we are very much aligned to the implementation of sustainable drainage systems and we want for the assets that we take ownership of through the adoption process to contribute to our overarching strategies, policies and performance commitments by:

  • managing surface water sustainably on the surface
  • creating resilience to climate change
  • increasing bio-diversity net gain
  • contributing to net zero carbon

Drainage systems considered at the earliest stages of site selection and design are easier to integrate into developments influencing other aspects of the site such as design, layout and function, and thereby reducing impermeable areas wherever possible. Successful designs need to consider local policy documents developed by the Local Planning Authority and should take into account the Local Flood Risk Management Strategy.

We encourage early and effective engagement during your planning and pre planning stages of the development, so please come and talk to us so we can work together to help deliver sustainable developments for the future.

Our developers guide to the adoption and vesting of new sewers (S104) provides all of the information that you need when offering new sewers and sewerage assets for adoption and an overview of the vesting process and requirements once your development site has reached 51% occupancy. It also reinforces Yorkshire Water’s approach and requirements to adopting surface water components which is very much aligned to CIRIA C753 The SUDS Manual’.

Developers guide to the adoption and vesting of new sewers

You can read this document in your browser or download it.

Looking to apply retrospectively?

Go to our retrospective sewer adoption section

Adoption of New Sewers (S104)

We encourage early and effective engagement during your planning and pre planning stages of the development, so please come and talk to us so we can work together to help deliver sustainable developments for the future.

The adoption of sewers and sewerage assets is contained within S104 of the Water Industry Act 1991. This covers the adoption of private sewers to be constructed at a future date subject to an Agreement with the Sewerage Undertaker. Once adopted, they become public sewers and will be operated and maintained by Yorkshire Water.

Sewerage assets offered for adoption, should be designed and constructed in accordance with the Design and Construction Guidance, Local Practices and Technical Standards contained within the Code for Adoption (2020).

You will need:

  • A location plan
  • S104 layout plan
  • Longitudinal sections
  • Hydraulic design
  • Manhole schedule
  • Construction details
  • Surface water systems drawings
  • Land transfer and ownership documentation
  • Any other information that could support your application.

Apply online

Our online application form is the quickest and easiest way to apply.

Apply online

You can also download and print this PDF or fill it out using Adobe Acrobat Reader.

The sewerage sector guidance procedure

The Sewerage Sector Guidance procedure for the adoption of new sewers and sewerage assets is outlined below, along with the relevant forms for completion.

Stage 1a: Pre-planning enquiry

As part of the pre-planning process, we have a requirement to ensure the effective inclusion of different sustainable drainage features and that the management train of features is considered on new development sites. We would therefore like to draw your attention to the CIRIA SUDS Manual which provides an overview of the concept of SUDS, which components are adoptable as sewers and the benefits these would bring to your development site and the local environment. By working together, we can integrate surface water management into the design of new developments, thereby protecting our environment and creating high quality places for our customers to enjoy.

Stage 1b: Pre-design discussion

To request a pre-design discussion with us, please download, complete and return this request form to us along with the supporting information. This is highly recommended prior to submission of an application, to ensure our requirements are clear and any issues with a site can be addressed at an early stage.

Pre-design discussion request form

You can download and print this PDF or fill it out using Adobe Acrobat Reader.

Stage 2: Design of new sewerage system

To submit an application, you can either download a form or make an application online.

Stage 3: Adoption agreement

On your instruction we will prepare the Model Sewer Adoption Agreement for your site. Please download, complete and return this request form to us along with the supporting information. 

Request to prepare engrossed agreement form

You can download and print this PDF or fill it out using Adobe Acrobat Reader.

However, if you wish to prepare the Model Sewer Adoption Agreement yourself and return it to us for signing, please download, complete and return this request form to us along with the supporting information. Please read our developers guide to preparing a model sewer adoption agreement for help completing the form.

Model sewer adoption agreement form

You can download and print this PDF or fill it out using Adobe Acrobat Reader.

Developers guide to preparing a model sewer adoption agreement

You can read this document in your browser or download it.

Stage 4: Construct gravity sewerage system

On receipt of Conditional and/or Technical Acceptance for your site, you may now request a Pre-start Inspection Meeting with one of our site inspectors. Please download, complete and return this request form to us along with the supporting information.

Pre-start inspection request form

You can download and print this PDF or fill it out using Adobe Acrobat Reader.

Stage 5: Maintenance period

If you would like to request a pre-maintenance inspection of your site, please download, complete and return this request form to us along with the supporting information.

Pre-maintenance inspection form

You can download and print this PDF or fill it out using Adobe Acrobat Reader.

Stage 6: Final inspection and vesting

If you would like to request a Final Inspection of your site, please download, complete and return this request form to us along with the supporting information.

Final inspection request form

You can download and print this PDF or fill it out using Adobe Acrobat Reader.

Stage 7: Variation of new sewerage system

If you would like to request a variation to the Technically Accepted drawings contained within the signed S104 Agreement for your site, please download, complete and return this request form along with the supporting information.

Request for a variation to the new sewage system

You can download and print this PDF or fill it out using Adobe Acrobat Reader.

Please do not start any construction works on site until you have received Conditional and / or Technical Acceptance of your design proposals from us. If you do, the works are undertaken entirely at your own risk and cost. You cannot have an inspection from us until Conditional and / or Technical Acceptance has been issued for the site.

Our Developers Guide to the Adoption and Vesting of New Sewers provides all of the information that you need when offering new sewers and sewerage assets for adoption and an overview of the vesting process and requirements once your development site has reached 51% occupancy.

 

Developers guide to the adoption and vesting of new sewers

You can read this document in your browser or download it.

More developer guides you may find useful

Developers guide to requesting a novation

You can read this document in your browser or download it.

Developers guide to requesting a variation

You can read this document in your browser or download it.

Developers guide to requesting a termination

You can read this document in your browser or download it.

Developers guide to redress

You can read this document in your browser or download it.

Typical manhole detail drawings

You can read this document in your browser or download it.

Yorkshire Water requirements for easements

You can read this document in your browser or download it.

Retrospective Sewer Adoption (S102)

Section 102 of the Water Industry Act 1991 covers the adoption of existing private sewers and sewerage assets. Only the legal owners of a private sewer (including pumping stations and other ancillaries) can put them forward for adoption and therefore the applicant must be able to prove ownership. The sewers and sewerage assets put forward must conform to our adoption requirements. Once adopted, they become public sewers and will be operated and maintained by Yorkshire Water.

Our Developers Guide to Retrospective Sewer Adoption (S102) provides all of the information that you need when offering existing private sewers and sewerage assets for adoption.

You can apply online using our online application portal, or you can download and submit your application form.

You will need:

  • A location plan
  • S102 layout plan
  • Longitudinal sections
  • Manhole schedule
  • Construction details
  • Camera survey
  • Surface water systems drawings
  • Any other information that could support your application.

Apply online

Our online application form is the quickest and easiest way to apply.

Apply online

You can also download and print this PDF or fill it out using Adobe Acrobat Reader.