Garage loft conversions

A garage loft conversion can be a cost effective way to add extra space to your home. Whether it’s to increase its value, make way for an at-home gym, or even to rent it out, a garage conversion can be a great idea.

They rarely require major structural changes, making them more cost effective than other conversions or extensions.

Skip down to garage loft conversion ideas, or keep reading for loads of information about planning for your garage loft conversion.

If you want a light and well ventilated conversion, check out our roof windows!

What is a garage loft conversion?

A garage loft conversion is a way to transform unused loft space in your garage into a usable room, usually without any major structural changes.

The main difference between a full garage conversion and a garage loft conversion is that the main garage room will still function as before, but it creates an additional floor of usable space above.

Benefits of a garage loft conversion

The benefits of a garage loft conversion include:

  • Improved property value
  • More space in your home
  • Lots of design options
  • Usually don’t require planning permission *
  • Less costly than other extensions
  • Low risk of error – as it’s a simple construction
  • Relatively fast to construct – compared to extensions or conversions that require structural work
  • Unlikely to impact council tax *

* True of most garage loft conversions, but be sure to check.

Do I need planning permission for a garage loft conversion?

You are unlikely to need planning permission for a garage loft conversion. Provided it doesn’t require structural changes, which most don’t, it should be covered by permitted development. However, it’s always best to check with your local authority first.

It can also be a good idea to apply for a Lawful Development Certificate. These are helpful when it comes to selling or remortgaging your property in the future to prove the conversion is legal and permitted.

How much does a garage loft conversion cost?

A garage loft conversion is likely to cost £10-20k, depending on the size of the garage and many other factors, including whether you want a full conversion, or just a loft conversion. If it needs structural work or you want to include plumbing, for example, it’s likely to cost the upper end.

The cost will depend on:

  • The state of the current garage
  • Design
  • Plastering and insulation
  • Flooring and wall coverings
  • Electrical supply
  • Stairs or other access
  • Roof windows
  • Plumbing if needed
  • Planning permission if needed

Be sure to also budget for furnishing and decorating the completed conversion!

Key things to plan for a garage loft conversion

While they’ll be many aspects you can adjust as you go along, or even work on afterwards, there are some key considerations to plan in advance when you’re undertaking a garage loft conversion.


Budget is vital to plan. Talk to a professional to get a quote to make sure you can afford the conversion. You might be able to pay in instalments, but you need to plan in advance so you can see it through to completion.

Intent for the conversion

Knowing what you intend to use the conversion for could inform key design considerations. For example, if you want to have it as an annex, you might want to plan in a small bathroom. On the other hand, if it’s going to be an art studio, you’ll need to plan for plenty of natural light.


Planning how you want to access the room is essential. If it’s going to be a utility room, you might want a proper staircase so you can safely carry up washing! On the other hand, if it’s going to be a teen hangout space, a pull-down ladder might work just as well.

You’ll have to talk with your design and construction team to work out the best solution for your budget, space and needs.

9 garage loft conversion ideas

There are many different ways you could use your garage loft conversion! Here are 9 ideas to inspire you.

1. Games room

Whether it’s for the kids or yourself, a garage loft conversion makes a great games room. They’re usually off to the side of the house too, so you don’t have to worry about making too much noise when the game of air hockey gets intense.

You could also use it to watch the game too. Just fit with a wide screen TV and sound system and it’s the perfect space to hangout and watch the footie.

2. Guest room

A bright and comfy guest room is essential if you love hosting family or friends from far afield. A garage loft conversion is a great option as it creates space away from the main house so your guests can get some privacy.

A neutral colour scheme is usually a good idea to make sure everyone feels comfortable. Provide some clothes storage space and, of course, a cosy bed.

It would be a good idea to add a small bathroom to the conversion too so you guests can enjoy an en suite.

A large bed in an attic conversion with two roof windows above it, lighting it up

3. Home office

A home office is an essential for any remote worker. It needs to be bright to encourage productivity, as well as quiet and functional.

A garage loft conversion makes for a great home office when separate from the house – you don’t have to worry about busyness around the home interrupting your work flow.

Keep the colour scheme light and consider some vivid highlights to encourage creative thinking.

A modern desk in a well-lit attic conversion with a colourful rug underneath


4. Art studio or hobby room

Garage loft conversions can make great art studios. With the right roof windows, they’ll have plenty of natural light to help with making art. If you want to maximise the light in your room, try using multiple, smaller roof windows distributed evenly around the space.

If art isn’t your thing, you could create a writing den, craft space or photography studio. Whatever your hobby, a garage loft conversion could provide the perfect space to exercise your creativity.

Two hands shaping a lump of clay on a work surface


5. Storage space

Whether it’s a collection of clothes or antiques, a garage loft conversion can host all sorts of items you need to store. If you’ve always wanted a walk-in wardrobe, this could be the perfect opportunity!

It’s essential that the room is well insulated if you’re storing things. It otherwise could be at risk of damp, which could damage your belongings.

Be sure to choose insulative roof windows, proper floor and roof insulation and make sure the heating is on in winter.

A white, well-lit room with lots of clothes storage including open wardrobes and shoe racks

6. Granny annexe


If a family member needs a place to stay, a garage loft conversion can make a great mini apartment. It’ll give both them and your family space, while providing a comfortable living area.


This also makes a great guest house.


Be sure to plan a small bathroom and appropriate access to the loft conversion! If you want the annexe to include a kitchenette space too, you might have to consider a full garage conversion, depending on the size of your garage.

A kitchenette positioned under two side by side roof windows

7. Utility room


Noisy washing machines in the kitchen can be very frustrating. A garage loft conversion can create the perfect space for a utility room in your home.


It’ll be out of the way of the main house, so you don’t have to worry about noisy machines disturbing dinner!


Remember, utility rooms often generate a lot of moisture, so be sure it’s kept well ventilated and warm to prevent condensation and mould.

A white room with panelled roof and clothes washing facilities

8. Reading loft

Is there anything better than a cosy space to curl up with a book? Create an at-home library in your garage conversion. Be sure to include comfy armchairs or sofas. You could even consider a mini fridge so you don’t have to go back to the main house for a between-chapters snack!

Use roof windows to make it bright during the day, but ensure there’s plenty of lamps for winter or night-time reading.


A blue corner sofa in a cosy attic room with a book on a small glass table

9. Teenage hangout space

Teenagers need space where they can relax, be themselves and hangout with friends. A garage loft conversion makes a great teenage hangout space as it’s separate from the main house, so they’ll have their independence but not be too far away when dinner’s ready!

The key is making sure it’s got plenty of lounge space. Maybe consider creating a games console space or ensuring there’s room for whatever hobbies your teenager is interested in.


A close up of someone using a play station controller


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