Around 60% of UK homes now have a water meter, but if you live in a flat, the odds are much lower. That figure covers houses and apartments together, and in practice, many blocks still run on unmetered bills split between tenants. If you’re renting or own a leasehold flat, the question of whether a meter helps or hurts is rarely straightforward.
I’ve been writing about UK household costs for a while now, and water metering is one of those topics that comes up again and again — especially from flat-dwellers who feel stuck between a landlord who won’t install a meter and a bill that seems too high. The rules are different for apartments, and most general advice misses the nuance. Here’s what you actually need to know.
How water meters work in a flat
The first thing to understand is that not every flat can have a meter. Many older blocks were built with a single water pipe feeding the whole building, and the bill is split between flats based on the rateable value of each property. In that setup, a meter isn’t physically possible without major plumbing work. Newer builds and conversions are more likely to have individual supply pipes, which means a meter can be fitted.
If your flat does have its own supply, the meter will usually be installed in the kitchen near the stop tap, or sometimes in a communal cupboard. Smart meters — the ones that send readings automatically — look like white circular units with a digital display. They use low-frequency radio waves to transmit data, and Public Health England confirms they pose no health risks. The signal is about 80 times weaker than a mobile phone’s.
What I’d do first: find out whether your building has individual supply pipes. Ask your landlord or managing agent. If they don’t know, your water company can check. That single question saves you chasing a meter that can’t be installed.
Why it matters for apartment dwellers
The average UK household uses 340 litres of water per day. In a flat, that figure can be lower — fewer bathrooms, less garden watering, often no dishwasher. But if you’re on an unmetered bill based on rateable value, you could be paying far more than your actual usage justifies.
Here’s the scenario that matters most: a single person living in a two-bedroom flat. The rateable value assumes a family-sized household, so the bill is high. Switching to a meter would almost certainly cut costs. The Consumer Council for Water offers a calculator that lets you compare your current bill with an estimated metered charge. It’s worth spending ten minutes on.
On the other hand, a family of four in a one-bedroom flat would likely see their bill rise on a meter. The rule of thumb is simple: fewer occupants than bedrooms usually means a meter saves money. More occupants than bedrooms usually means unmetered is cheaper.
I’ve noticed that many flat-dwellers don’t realise they can request a meter even if the building is unmetered. The water company is legally required to fit one in England and Wales, but they need access to the property and confirmation that individual supply pipes exist. If your landlord refuses access, you may need to negotiate — or consider whether the savings are worth pushing for.
Where flat-dwellers get tripped up
Most of the confusion I see comes down to a few recurring mistakes. Here’s what tends to go wrong and how to avoid it.
Assuming a meter is always cheaper
It’s not. If your flat has more people than bedrooms, an unmetered bill based on rateable value may work out better. The Energy Saving Trust points out that large families often benefit from staying unmetered. Before requesting a meter, run the numbers using the Consumer Council for Water’s calculator. You can also ask your water company for a meter assessment — some will give you an estimate before installation.
Not checking whether your building allows it
This is the most common blocker. If your flat shares a supply pipe with other units, a meter can’t be installed without re-plumbing the entire building. That’s expensive and disruptive, and your landlord is unlikely to agree. Check with your water company first. They can tell you whether your property has an individual supply. If it doesn’t, you’re stuck with unmetered billing unless the building is redeveloped.
Ignoring the grace period
Once a meter is installed, you typically have one to two years to request removal at no cost. After that, removal may be refused or charged. If you’re unsure whether a meter will save you money, use that grace period to track your usage. If your bills go up, you can switch back — but only if you’re not in a compulsory metering area.
Forgetting about compulsory metering areas
Thames Water and Anglian Water require smart meters. Southern Water mandates metering generally. If you live in one of those regions, you don’t have a choice. The meter will be installed, and you’ll be billed by usage. In that case, the only question is how to reduce your consumption. A smart leak detector can help you spot problems early, which is especially useful in flats where a slow drip in a hidden pipe can go unnoticed for weeks.
→ Scroll right to see all columns
| Household type | Likely better off with meter? | Why |
|---|---|---|
| Single person, 2-bed flat | Yes | Rateable value overestimates usage |
| Family of 4, 1-bed flat | No | Actual usage exceeds rateable estimate |
| Couple, 1-bed flat | Possibly | Depends on current rateable value |
| House share, 3-bed flat | Usually yes | More occupants than bedrooms |
How to get a smart water meter in your flat
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If you’ve decided a meter makes sense, here’s the process from start to finish.
Check eligibility with your water company
Call or visit the website of your water supplier. Tell them you want a meter and ask whether your flat has an individual supply pipe. They can check their records. If the building is on a shared supply, they’ll tell you straight away. If it’s eligible, they’ll arrange a free installation. In England and Wales, they are legally required to fit a meter on request.
Get your landlord’s permission if you rent
If you’re a tenant, the meter belongs to the property, not to you. Your landlord needs to agree to the installation. Most will say yes because it adds no cost to them and can make the property more attractive to future tenants. But if they refuse, you can’t force it. In that case, ask your water company about an assessed charge — a bill based on estimated usage rather than rateable value. It’s not as accurate as a meter, but it may still lower your bill.
Prepare for installation day
The water company will contact you with an appointment. For flats, the installation is usually straightforward — the meter goes near the kitchen stop tap. The water may be turned off for about 30 minutes. You don’t need to be home for external installations, but for internal ones you’ll need to let the engineer in. After installation, you’ll receive activation notification within 90 days.
Track your usage and adjust habits
Once the meter is active, you can monitor your consumption through an online portal or app. Smart meters show hourly breakdowns, which makes it easy to spot waste. The research suggests smart meters can boost water efficiency by around 12% simply by making people aware of their usage. Small changes — shorter showers, fixing dripping taps, running full washing loads — add up quickly.
What to do if your bills go up
If after a few months your metered bill is higher than your old unmetered one, you have options. Within the one to two-year grace period, you can request removal at no cost. After that, you may be stuck with the meter. If you’re in a compulsory metering area, removal isn’t an option at all. In that case, focus on reducing usage. A water leak detector can catch problems early, and simple fixes like aerated shower heads can cut consumption without noticeable difference.
- 1Check eligibilityContact your water company to confirm your flat has an individual supply pipe. If it doesn’t, a meter isn’t possible without major plumbing work.
- 2Get landlord approvalIf you rent, ask your landlord in writing. Explain that installation is free and can make the property more efficient. Most will agree.
- 3Book installationThe water company will arrange a visit. For flats, the meter goes near the kitchen stop tap. Water may be off for 30 minutes.
- 4Monitor and adjustUse the online portal to track usage. Small habit changes can cut your bill by 10–15% if you reduce usage by 20%.
Frequently asked questions
Can my landlord refuse a water meter? ▾
What if my flat is in a compulsory metering area? ▾
Will a smart meter increase my electricity bill? ▾
Can I switch back to unmetered billing after getting a meter? ▾
How do I read a smart water meter manually? ▾
The key takeaway is simple: a water meter can save you money, but only if your flat is eligible and your household size makes it worthwhile. Check your building’s supply setup, run the numbers, and use the grace period to decide. If this was useful, you might also want to read understanding lease breach legal consequences when renting.
Sources and Further Reading
Negotiating rent in the UK: master the art of the deal — Practical strategies for lowering your monthly costs, including how utility arrangements factor into your offer.
Smart water meters in the UK: a simple guide. Selectra, 2026.
Smart water meters UK 2026 explained. Axiom Eco Homes, 2026.
