New Appointments and Variations (NAV)

NAV SSL & Pre-development is a free of charge application that provides you with a Site Status Letter (SSL) and a budget estimate in the form of a Pre-Development report.

• What we need from you - In order to do this you’ll need to send us a site location plan showing the site boundary (on an OS background). On occupied sites, if there are existing premises within the proposed NAV boundary, please provide any available details of the occupant & plans for future supply.
• What you'll get from us - When we have all the information we need we will issue the following within 21 days
• Site Status Letter - If you are applying under the “unserved” criteria you’ll need confirmation from us of the served status of a site. This will support your application to Ofwat.
• We’ll complete the necessary assessments to understand the impact of the proposed development on our network and provide a NAV Pre-development report outlining;

When you're ready to move forward, you'll be able to convert this application in to a full NAV Bulk Supply application via the online portal.

If you are confident that you wish to apply for a NAV site and/or are short on time, you can skip the free NAV SSL & Pre-development step and apply directly for NAV Bulk Supply application, which is subject to application & design fees. Please note that your application will not be accepted until full payments are received.

• What we need from you - When it comes to making a full application you’ll need to send us a site location plan showing the site boundary & preferred point of connection (.dwg format with an OS background) and the demand information for the proposed site.
• What you'll get from us - When we have all the information we need we will issue the following within time scales detailed
  • Site Status Letter - If you are applying under the “unserved” criteria you’ll need confirmation from us of the served status of a site. This will support your application to Ofwat. The Site Status Letter will either be revised if any changes since the NAV SSL & Pre-development application or created if you have applied directly for a NAV Bulk Supply application within 21 days.
  • We’ll complete the necessary assessments to understand the impact of the proposed development on our network and provide a NAV Bulk Supply Cost Advice within 28 days outlining;
    • Proposed design of bulk water connection
    • the cost of providing a bulk water connection to your site,
    • capacity availability and constraints,
    • information on any reinforcement works (where applicable) and;
    • details of any infrastructure charges, credits and income offset applicable to your site.

You can submit your enquiry through our online portal and once received a member of our team will be in touch to discuss your site. We will then complete the necessary assessments and issue a NAV Bulk Supply Cost Advice to you within 28 days.

When you have received your Cost Advice, reviewed it and are ready to move forward, we need you to make necessary payments and accept the NAV Bulk Supply Cost Advice on our online portal.

• Bulk Supply Agreement - We’ll (both parties) need to enter into the bulk water agreement for your site. This outlines the details of the supply and general arrangement between us for the site. Ofwat will not grant the new appointment or variation without this being in place, so it’s an important step. We aim to get this standard agreement to you well within 28 days.
• Bulk Water Connection - When you are ready for your bulk water connection you will need to make the necessary payments and get in touch with us to discuss the work and agree programme dates. We will work with you throughout this stage of the process to ensure it all goes smoothly.Depending upon the work we are undertaking this can take up to 90 days however we’ll do what we can to meet your programme needs. If there are any third-party constraints (ie a Road Closure) that may delay us we’ll let you know.

If your development requirements change after construction begins, you'll need to submit a NAV Capacity Check application. A redesign fee will be charged and must be paid before we begin additional work. Once payment is received, we'll start the capacity check, which covers triage, modelling, and issuing an updated Bulk Supply Agreement and Site Status letter, if necessary.

If no changes are needed to your existing bulk supply connection, we will provide an updated Bulk Supply Agreement, and Site Status letter if you request a site boundary extension. No alterations will be required for the existing bulk supply connection.

However, if the capacity check shows that your existing bulk supply connection cannot handle the additional load, you will need to convert the Capacity Check into a NAV Bulk Supply application. This will incur the standard NAV application and redesign fees. This is different from a standalone NAV Bulk Supply application, as you've already paid a redesign fee under the original NAV Capacity Check application.

1. Submit your application for NAV SSL & Pre-Development using our online portal. You will need to provide:-

• Site plans in PDF including site boundary
• Your preferred point of connection location
• Expected pressure and flows to your site in M3 & daily peak demand L/S
• Build Rate

2. Within 5 calendar days of receiving your application we will confirm in writing that we have everything needed to answer your enquiry.

3. Within 21 calendar days we will issue a Site Status letter which will give you the served/unserved status of the site and Pre-Development report detail estimated costs.

1. Submit your application for a NAV Bulk Supply using our online portal. You will need to provide:-

• Evidence of your appointment by Ofwat
• Site plans
• Your preferred point of connection
• DWG showing site boundary & POC
• Expected pressure and flows to your site in M3 & daily peak demand L/S
• Build Rate

2. Make payment for the necessary application and design fees quoted. Please note that your application will not be accepted until full payments are received. See Payment information.

3. Within 5 calendar days of receiving your application we will confirm in writing that we have everything needed to answer your enquiry.

4. The Site Status Letter will either be revised if any changes since the NAV SSL & Pre-development application or created if you have applied directly for a NAV Application within 21 calendar days.

1. After payment is received or your Cost Advice is accepted via the Development Experience Portal, our Design Team will begin to design how we best provide you with your bulk supply.

2. We will begin to review your proposed connection point and draft a NAV Bulk Supply Cost Advice which will detail:-

• Cost to provide your bulk water connection
• Your point of connection
• Capacity and assets in the area
• Expected pressure and flows to your site

3. We will return the NAV Bulk Supply Cost Advice to you within 28 calendar days of accepting your application

4. You will need to ensure you understand our terms before continuing

1. Review and accept your quote on the My Developments portal, and make payment. See Payment information.

2. After your acceptance, agreement and payment is received, our Design Team will begin to design how we best provide you with your bulk supply.

1. After payment or acceptance or Cost Advice via the Development Experience Portal, our Design Team will draft a Bulk Supply Agreement within 28 days. This will include:-

• The details of how our relationship will work in the future including costs.
• Your point of connection.
• Capacity and assets in the area.
• Expected pressure and flows to your site.

2. You will need to review and have returned a signed copy to us to proceed.

1. Once we have a signed Bulk Supply Agreement, your Liaison Engineer will be in contact to introduce themselves to you and understand to your timescales.

2. We will then instruct our delivery partner to make your connection and any required reinforcement in line with our agreement.

3. NAV installation – We will lay, pressure test, disinfect and sample the newly laid pipework and complete the final connections. This will be in multiple visits.

4.Your connection will normally happen within 90 days from payment and/or signed Bulk Supply Agreement, or no later than the date agreed with the NAV.

1. Submit your application for a NAV Capacity Check using our online portal. You will need to provide:-

• Original NAV Bulk Supply DS number
• Evidence of your appointment by Ofwat
• Site plans
• DWG showing site boundary & POC
• Expected pressure and flows to your site in M3 & daily peak demand L/S
• Build Rate

2. Make payment for the redesign fee quoted. See Payment information.

3. Within 5 calendar days of receiving your application we will confirm in writing that we have everything needed to answer your enquiry.

4. If modelling confirms

• No changes are needed to your existing bulk supply connection, we will provide an updated Bulk Supply Agreement, and Site Status letter if you request a site boundary extension within 14 calendar days.
• Your existing bulk supply connection cannot handle the additional load, we will advise you within 14 calendar days that you will need to convert the Capacity Check into a NAV Bulk Supply application. This will incur the standard NAV application and redesign fees. This is different from a standalone NAV Bulk Supply application, as you've already paid a redesign fee under the original NAV Capacity Check application.

Follow the NAV Bulk Supply timeline