A Guide to Plumbing For a Loft Conversion

Increasingly homeowners are opting to convert their existing loft space into a new living area rather than moving to a larger house.

But what do you need to consider when thinking about the plumbing requirements of carrying out a loft conversion? This article will outline what changes to your plumbing you may or may not need to make in order to make the project run as smoothly as possible.

Why Opt for a Loft Conversion?

Proceeding with a loft conversion is an increasingly preferred option to moving home. First of all, London property prices are such that the stamp duty on a new house alone can come to more than the cost of converting a loft.

That’s before even taking into account estate agent fees to sell your property and pay legal fees for searches on your new property. Loft conversions can cost as little as £25,000 and can add double that amount in value onto your home, so pursuing one is a prudent choice.

For more information about loft conversions we recommend looking at the North London Loft Rooms website.

Can Your Boiler Sustain a Loft Conversion?

Your plumbing needs to be an important part of your planning process and as a loft conversion is likely to have a big impact on your heating and hot water systems.

If you operate an older boiler that relies on heating up cold water tanks, then it may the case that the tanks have to go in order to free up vital space for the new living area. This is a popular option because cold water tanks can take up so much room (usually the size of a cupboard).

This is likely to result in you investing in a new combi boiler system which will give you hot water instantaneously whenever you need it. This is a cost that needs to be prepared for if you desperately need the space currently taken up by your cold water tanks.

It may also be the case that you want to install an en-suite bathroom up there. If that’s the case, then you need to make sure your boiler has the necessary firepower to deal with the additional strain of providing hot water to yet another room.

Installing Radiators in Loft Conversions

If you are working with a reputable loft conversions contractor, they will make sure to install plenty of insulation into your new loft which will help to trap heat and prevent it from escaping through your roof.

Since the loft is the highest point of your home, it is often naturally warm, but it is a good idea to install at least one radiator to make sure your new rooms are warm enough on the coldest nights of winter.

If you do go for a bathroom in your loft space, then it is also likely that you will require a towel radiator to complete your suite, ensuring you can keep your towels dry during the damp and dark winter.


With so many homeowners now opting for loft conversions it’s important to think about the plumbing aspects associated with them. Assessing your boiler is crucial, but also take time to think about how much plumbing architecture you intend to put in place as part of your project.

Whilst taps, radiators, showers, and sinks can have their pipework fairly easily threaded through floor joists, running pipes to your soil stack could prove trickier. It may also be the case that your current boiler isn’t up to the task of providing hot water to several new areas of your home.

If you need plumbing advice for your loft conversion don’t be afraid to call us on 0208 323 5678 or chat with a member of our team using the box at the bottom right-hand corner of our website.

A Guide to Plumbing For a Loft Conversion

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