What Happens to Your Water Account When You Move House

Every other utility on a typical move-house checklist — energy, broadband — has a competitive market sitting behind it: several companies fighting for your custom, and a formal switching process to move between them. Water in England and Wales doesn’t work that way for households. Whichever regional company already covers the postcode is your only option, by law, regardless of price or service.

This isn’t an oversight — it’s a deliberate policy choice, and one with real competition sitting right next to it. The Water Act 2014 did open a genuinely competitive retail market, live since April 2017, where customers can switch supplier and negotiate deals — but it’s restricted to non-household customers: businesses, charities and the public sector. Households were left out of those reforms entirely, following a UK Government decision as far back as 2002 that the cost and complexity of regulating household competition would outweigh the benefit. So if you’ve seen adverts for switching water supplier, that business retail market exists — it’s just not one you, as a homeowner or tenant, are eligible to use.

The regional-monopoly system above is an England and Wales arrangement. Scotland and Northern Ireland both bill and organise household water differently enough that it’s worth checking which system actually applies to your move before assuming anything below carries over — see Citizens Advice Scotland or the Northern Ireland Executive directly rather than assuming an England-and-Wales rule applies.

How your bill is actually calculated depends on whether the property has a water meter, and that’s a fact about the address, not about you — a metered old home and an unmetered new one (or the reverse) is entirely normal, and worth checking rather than assuming.

Household customers in England and Wales generally have the right to ask for a meter to be fitted, free of charge, and to see whether it actually lowers the bill:

The company should install it within 3 months of your request (up to 6 months in areas where free meters are being rolled out for the first time), and if you find you aren’t actually better off, you can usually change back to unmetered billing within 12 months — unless you moved into a property where a meter was already installed, or your area has since moved to universal metering. It’s most likely to be worth it if there are fewer people living in the property than there are bedrooms, or the property carries a high rateable value: exactly the kind of mismatch a move can create.

Because there’s no new supplier to select, the whole job reduces to two administrative steps done correctly and on time: telling your outgoing regional company you’re leaving, and telling whichever company covers your new address that you’ve arrived. Citizens Advice is direct about why the timing matters:

1. 1

   Give notice before you go

   Tell your outgoing water company your moving date as soon as it's confirmed — if the property is metered, give at least 5 working days' notice so they can arrange a final reading.

2. 2

   Take your closing reading

   On the day you leave, if the old address is metered, read the meter yourself and keep a note of it (a photo of the dial is the easiest record).

3. 3

   Take your opening reading

   On the day you arrive at the new address, if it's metered, take a reading straight away — before anyone's had a chance to run a tap.

4. 4

   Confirm both with the relevant company

   Send the closing reading to your outgoing supplier and the opening reading (or simply your move-in date, if unmetered) to whichever company covers your new postcode.

Most moves land on one of two setups, and neither one requires you to “apply” to anything the way you would with a competitive market:

This isn’t a theoretical worry. CCW’s own research into billing and debt complaints documents a real case where a customer’s account transition — from an unmetered, rateable-value bill to a metered one — left an old debt sitting quietly alongside his new charges, with consequences that reached his credit file before the company made proper contact:

The same report specifically flags account transitions — exactly the kind a house move creates — as a known trigger for these disputes, recommending companies “engage early with customers moving from an unmetered home to a metered one” to head them off. For a departing or arriving occupant, the practical risk runs in both directions: leave without a closing reading and an estimate can run high; arrive without confirming an opening reading and you can find yourself billed for a stranger’s usage before anyone at the company has a reason to separate the two accounts. A reading, taken and sent on the day, is what actually draws that line.

Because you can’t vote with your feet on water the way you can with energy or broadband, having somewhere independent to take an unresolved dispute matters more here, not less. That’s the role CCW plays — distinct from Ofwat, which regulates the industry itself rather than handling individual complaints:

If a final bill, an opening reading, or who’s liable for a disputed period can’t be sorted out directly with your water company, CCW can take the complaint on from there, free of charge — a role closer in spirit to how the Energy Ombudsman or Ofcom’s complaint routes work for energy and telecoms, even though water’s complaint structure isn’t organised identically to either.