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Getting a loft conversion loan: what you need to know

Converting your loft can give you more living space and add value to your home. But how much does a loft conversion cost and what do you need to keep in mind?

Is your house suitable for a loft conversion?

This is the number one thing to check before you begin. The key point for consideration is size. You don't want to end up with a room you can't stand up in.

According to the HomeOwners Alliance, you need at least 2.5m between the top of the roof joist (where the floor will be) and the bottom of the ridgeboard (the board running along the highest point of your roof space). You also want enough floor space – usually about 5.5m side to side and 7.5m front to back.1

How much does a loft conversion cost?

As a general guide, prices for a loft conversion can start from around £20,000.1 Costs will depend on the size and shape of your loft, and where you live. It’s a good idea to get several quotes before you begin any work.

Who should handle your loft conversion?

A loft conversion is a big job, so it’s likely to be a good idea to go with an expert. These are some of the options:

  • a specialist loft conversion company can offer you the complete package, from planning to painting and decorating

  • an architect can draw up something unique and can usually help with regulations and finding builders

  • a general builder can handle the process, but it's worth making sure they have loft conversion experience

Do loft conversions need planning permission?

Usually, loft conversions within your existing roof space don't need planning permission, but always check. In some situations you'll need permission, for example if:

  • you live in a conservation area or other protected area

  • you want to raise the height of your roof or extend out to the side

  • your loft conversion is particularly large (more than 40 cubic metres of space)

  • you want clear glass side windows that will overlook your neighbours

Building regulations for loft conversions

All loft conversions need building regulation approval. Building regulations cover things like fire safety, structural strength and insulation.

You'll need to make a building regulations application to a building control body (BCB) before you begin work, and may have to submit detailed plans. A BCB can be your local authority or a private approved inspector who will tell your local authority about the work. Your builder or architect should help you through this process.

What to consider

A loft conversion can be a lot of work, but it can also pay off. The HomeOwners Alliance estimates it can add up to 20% of value to a property.1

Ideally, you’d be able to save up the amount you need so that you don’t need to borrow. But if that’s not realistic, you could look at using a personal loan. You can use a home improvement loan calculator to get an estimate of what your repayments would be, based upon the amount you want to borrow and how long you’d like to borrow for.

Disclaimer: please remember...

We are a bank, not DIY gurus. We provide this information as a helpful guide. However, if you're thinking of getting a loft conversion, please carry out your own research and don't assume these details are 100% correct or the most up to date available.