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Barnet Loft Company

Converting Barnet & London lofts since 2003

Loft Conversion in Barnet. Loft Conversions North London. Loft Conversions Central London

We deliver quality loft conversions for clients in Barnet, throughout North London, West London, North West London and the EN + N + NW Postcode areas. Our concept through to completion service means we will design your loft conversion, build your loft room and then beautifully decorate. We take care of any relevant planning permission consents required before starting your loft conversion, and naturally building regulations are always dealt with.

At The Barnet Loft Company we specialise in high quality loft conversions and extensions, adding additional living space to your property, whilst at the same time increasing the value of your property. With increasingly high costs in moving home and in a short period of time, The Barnet Loft Company can introduce additional, valuable space to your residential address.

Working in London Area including:

Loft Conversions Barnet, Loft Conversions Central London, Loft Conversions Camden, Loft Conversions Enfield, Loft Conversions Hendon, Loft Conversions Finchley, Loft Conversions Highgate, Loft Conversions Totteridge, Loft Conversions Whetstone, Loft Conversions Crouch End, Loft Conversions Bounds Green

This could not only enhance the quality of your home life, but also adds considerable value to your property. Creating more living space with The Barnet Loft Company is a simple, cost effective way of making your home a better one!

The Barnet Loft Company is based in High Barnet and whilst predominately working in North London, Essex and Hertfordshire, we do also work around London area. We are dedicated to customer service and with a fully qualified team of professional staff; we guarantee our cutting-edge workmanship is simply unrivalled.

If you’re looking to introduce more space and add value to your property, look no further. With over 20 years experience, The Barnet Loft Company are your number one choice for loft conversions and attic refurbishments and bathrooms.

Converting Lofts in London including:

Loft Conversions Chelsea, Loft Conversions Queens Park, Loft Conversions Hampstead, Loft Conversions Nothing Hill, Loft Conversions Euston, Loft Conversions Kensington, Loft Conversions Muswell Hill, Loft Conversions Mill Hill, Loft Conversions Palmers Green, Loft Conversions Islington, Loft Conversions Edgware

OUR LOFT CONVERSIONS

Barnet Loft Conversion on YouTube

Hip To Gable Loft Conversion - Semi detached house

Dormer loft conversion - Terrace House

Barnet Loft Conversion

Dormer loft conversion in Barnet. Master bedroom loft conversion with ensuite in London, Hampstead NW11

Loft Conversion in Barnet. Loft Conversions North London. Loft Conversions Central London

You need more space in your home, but you can’t afford to move. Or maybe you would be perfectly happy with your home if only it was a bit bigger.

If you own a house, you have four main potential options: add a loft conversion, build an extension outwards, excavate a basement, or do a combination of those things.

Basements often aren’t possible, and can be very tricky. With a ground-floor extension, you are often faced with a trade-off: more house, less garden.

Which is why so many people are drawn to converting their lofts, which will also add to the value of your property. So here’s our ultimate guide to building a loft conversion with London and UK loft extension examples.

Do I need planning permission for a loft conversion?

If you are wondering which loft conversion regulations apply to you, then you are not alone. There are so many rules and regulations that it can be hard to decide whether you should extend with or without planning permission.

Most of the time, you can convert your loft subject to specific limitations and conditions without applying for planning permission. You only need to make a certificate of lawfulness application to prove your development falls under permitted development rights for which your residential architect will need to prepare your loft conversion planning drawings and floor plans, and your application form.

What is a Certificate of Lawfulness?

When you don’t need planning permission, but want proof that your conversion or extension was covered by permitted development rights, you can apply to your council for a certificate of lawfulness (sometimes known as a lawful development certificate). This can be important when you decide to sell the property

Do I need a Party Wall Agreement for a loft extension?

Unless you have a detached house, you might need a Party Wall Agreement with your neighbours. Whether you do or don’t depends on whether your works will affect the walls that you share with the neighbours.

A simple roof light conversion probably won’t need their agreement, but other types of conversions often do. Your architect will be able to advise you. 

Do I need building regulations approval for a loft conversion?

Yes, you will also require building regulations approval to convert a loft or attic into a habitable space so make sure your architect and your structural engineer prepare the necessary building regulations plans, and structural specifications and structural calculations.

Let’s not forget… Doing it on your own or skipping this step and heading straight to construction is certainly not advised as this could mean pocket-burning fines!

How much does a loft conversion cost in London?

Unsurprisingly how much a loft conversion costs varies depending on the scale and complexity of the work.

How much does a rooflight/basic room in the loft cost?

This is the cheapest type of conversion and will typically be somewhere in the region of £25,000-£40,000. With this type of renovation you can expect the floor to be reinforced, two skylights, a staircase for access, full electrics, fire safety measures and insulation.

How much does a dormer loft conversion cost?

You get all of the above with something like this plus the addition of dormer windows. Dormer roof construction increases floor space, adds height and gives you more natural light. They help with staircase access too.

You won’t get anything cheaper than £35,000 and if it’s a dormer conversion with a double bedroom and en suite you'll be looking at anywhere from £50,000 upwards.

How much does a hip-to-gable loft conversion cost?

At this point, you’re talking serious construction work. You will need scaffolding to be fitted with an appropriate cover as most of the roof structure will be removed – this will bump up the price. Here the time estimates of the contractor have to be realistic; if not the price can rise quickly.

Also as you will be raising the flank wall, you might have to build the wall in masonry, which may require a specialised trade such as bricklayers. It could be good to confirm the adequacy of the foundation of the existing flank wall before raising it. In London, you should be budgeting for at least £60,000 upwards. 

How much does mansard conversion cost?

The scaffolding and parapet walls (or flank walls) issue will be similar to a hip-to-gable conversion but the amount of work will be even bigger.

Structurally it is also more complex and it may require cranked beams to be designed and appropriately installed on site. Depending on the site the length of the structural element has to be considered as it can sometimes be difficult to lift them up there in constrained locations.

Designing smaller elements and splicing longer pieces with the subsequent connection design is something that should be considered at an early stage. In London, you should be factoring in at least £100,000 and most likely substantially more.

Looking forward to your exciting new loft

We hope you have learned something from our ultimate guide to designing and building a loft conversion. We think that there are amazing possibilities for what you can do with your loft, and it can make a huge difference to your home. 

While putting together this guide, we talked to clients, friends and family about their experiences of converting their lofts, and all of them – every single one – said they were happy that they had done it.

The secret to transforming the way you live might be sitting there, above you, unused right now… 

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Hip to gable loft conversion in Barnet. One bedroom loft conversion with ensuite. London, Finchley NW3.

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Best price for your loft conversion


In 2024 the average cost of loft conversion in London is between £45,000 and £90,000. Most Londoners convert an attic into a dormer because it adds extra space and light.

A loft conversion is a great way to add extra space to your home and increase the value of your property. A loft conversion is the type of construction work that requires lots of planning and preparation. Cost is one of the things you need to consider before converting your attic.

The roof conversion cost in London is different, unlike other cities in the UK. The prices of materials have significantly risen, and loft builders are still quoting you by the old prices. So you don't run away, and they can win your job. With the help of this guide, you can challenge your builder on the validity of their quote. Or to find out a ballpark figure before getting onboard with your loft conversion project.

Loft Conversion Near Me.

Loft Conversion Hampstead.

As a general guide, a 35m2 conversion can cost from as little as £45,000 up to around £90,000 or more. Loft conversion costs, as you might expect, will depend upon a multitude of factors.

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