Connection charging arrangements

Find out about our charges for connecting a property to the public water supply or a public sewer.

We collect and dispose of wastewater across the south east of England, and supply water in parts of this region. Water is supplied in the rest of the region by other water supply companies – contact them for more about their charges.

The information below applies when you intend to connect premises to the public water supply or a public sewer, even if you are using an existing drainage connection. It explains the liability to pay infrastructure charges directly to Southern Water in addition to the cost of making the connection.

New connection charging arrangements
2021–22:

New connection charging arrangements 202122

new connection charges information requirement on bill stability

New connection charging assurance statement

Infrastructure charges scheme

Charges Calculator

Charges calculator guide

The calculation tool can be used to provide customers with estimates, please be advised that this is indicative only and would be followed up with a formal estimate on application. 

 

Developer Services Application Fees 2021–22

 

Application type Application fee (inc VAT) Turnaround time
S45 Water Connection (For First connection) £86.57 20 Working Days
S45 Water Connection (For Subsequent connection(s) £52.50 20 Working Days
S185 Water Diversion (Southern Water) £1740.00 30 Working Days
S41 Water Main Requisition Variable-See Application Variable-See Application
S106 Sewer Connection (New Manhole) £355.00 15 Working Days
S106 Sewer Connection (Any Other Connection) £277.00 15 Working Days
Declaration Of Works £102.00 (£186.00 Inc Inspection Fee) 15 Working Days
S18 Build over/Near Sewer £720.00 20 Working Days
Pre-planning Enquiry Waste Water Waste Water Flow Surface Water Capacity Check
0-50 units £169 £169
51-250 units £510 £510
>251 units £680 £680
Pre-planning enquiry Water Waste Water Flow
0-50 units £169
51-250 units £510
>251 units £680
S104 Sewer Adoption (New Sewer) £618.00 20 Working Days
S185 Sewer Diversion (Developer) £373.20 20 Working Days
S185 Sewer Diversion (Southern Water) £2220.00 30 Working Days
S98 Sewer Requisition £4672.80 60 Working Days
Pre-Design Assessment See Application 14 Working days
S102 Sewer Adoption (Existing Sewer) £386.00 20 Working Days
NAV Application Charges Waste Water
0-50 units £169 £169
51-250 units £510 £510
>251 units £680 £680

2020–21:

Charging arrangements 2020–21

Charging arrangements assurance statement 

Statement of Significant Changes for New Connection Services

Infrastructure Charges Scheme

Charges Calculator

The calculation tool can be used to provide customers with estimates, please be advised that this is indicative only and would be followed up with a formal estimate on application. 

 

Water charge
Gross Water infrastructure Charges - individually metered properties

Our gross infrastructure charges for water are detailed in the table below:

Water Charge Charge How is this applied?
New infrastructure charge 21/22 £0 Per property
Old infrastructure charge £409.18 Per property
Water income offset -£335 Per property

Wastewater charge

Gross Wastewater infrastructure Charges - individually metered properties

Our gross infrastructure charges for wastewater are detailed in the table below:

Wastewater Charge Charge How is this applied?
New infrastructure charge 21/22 £574 Per property
Old infrastructure charge £409.18 Per property
Wastewater income offset -£128 Per property

What are infrastrucure charges?

The Water Industry Act 1991 allowed companies to make an infrastructure charge as a contribution to the overall costs of developing and maintaining the water supply and sewerage networks. They are payable where new or existing premises are connected for the first time to the public water supply or to a public sewer, either directly or indirectly (for example, via a private sewer or drain).

Sewerage infrastructure charges are payable when the premises are connected, either directly or indirectly (for example, via a private sewer or drain) to the public sewerage system - normally when the sink(s), bath and WC(s) are installed.

 

Developments that incur infrastructure charges

Infrastructure charges will be raised when any premises are connected to our water supply or to our sewerage network for domestic drainage. Here are some examples of typical premises:

  • Private dwelling houses
  • Flats and maisonettes
  • Sheltered housing units
  • Hotels and guest houses
  • Retirement homes and nursing homes
  • Hostels and student halls of residence
  • Caravans, mobile homes and moored house boats
  • Communal laundry, shower and toilet blocks
  • Shops, commercial or industrial units, petrol filling stations or other buildings with domestic water fittings, eg WCs, washbasins
  • Substantial extensions to any of the above

This is not a full list. If you’re in any doubt, please seek advice from us early on. You may incur additional charges for non-domestic use of our services, eg for effluent from an industrial process carried out on the premises.

 

When another amount is payable

Infrastructure charges for premises comprising private dwellings which are to be supplied and are billed for water services together (such as sheltered accommodation), and other premises to be supplied by a service pipe with nominal internal diameter larger than 20mm (such as hotels and office buildings), may be a multiple of the standard amount to reflect the load on the service. For those properties where the water load has to be calculated, the procedure agreed nationally with Ofwat will be applied.

 

Who can make the actual connections

Connections into the public sewer can be made by developers, but only with specific approval after notice has been given to Southern Water of the intention to do so. Please contact Southern Water on 0330 303 0119 for an information pack.

 
 
 
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