Cost of Building a Garage

Want to know how much it costs to build a garage?

Depending on the garage you choose, you can expect to pay in-between £1,200 to £13,500, on average.

How can this cost guide help you?

In this ultimate guide, we go through the different prices of materials and labour you'd expect to pay when building a garage, including garage builder fees and costs for both single and double garages.

Are you looking for a garage builder quote?

Check out all our local tradespeople for some quick and easy quotes.

Want to find out more - have a read below...

To get more insight into the construction sector, be sure to check out our Construction Industry Statistics guide, which is updated daily.

How Much Does it Cost toBuilding a Garage?

The cost of building a garage can range from £1,000 to £20,000.

But what does this cost included?

This includes the costs of materials and hiring a builder to carry out the work. The specific type of garage, the quality of work, and the size of the installation can all affect the final price.

What can increase the overall costs of a garage?

Naturally, the larger the garage, the higher the costs. Similarly, if you want a high-quality finish, or an expensive garage door, then expenses will increase.

Price to Build a Garage

Here we look at the different types of garage extensions you can build and their estimated costs:

Concrete Prefab Garage Costs

A prefabricated garage (known as a prefab), is a factory-made kit garage.

A prefab is the cheapest and easiest method of installing a garage onto your property.

Starting prices for the kits are around £1,000 and go up as far as £5,000. For a simple single concrete prefab garage for the kit alone, it costs around £1,200, and a double concrete garage will start at around £3,000.

Metal Garage Costs

Metal prefab garages are typically fewer permanent structures.

They usually are built to only last a few years, and therefore if possible, it's always advisable to look to the concrete prefabs for a longer-lasting, higher quality garage.

A single metal prefab garage will cost around £250 for a low-quality unknown brand, and then the price goes up to around £2,500 for a double higher quality metal prefab garage.

Wooden Garage Costs

A wooden prefab garage kit is the second most financially accessible option for prefab kits on the market.

Starting at around £150 and ranging in up to £2,000, it is by far the cheapest option to those looking for a quick, easy build garage extension.

Brick Garage Costs

A brick garage is a longer-lasting, higher-quality garage.

The typical starting costs of a UK-sized garage extension, built from brick, with a flat roof will start at around £4,500. This is by far the most common form of garage extension chosen. If built well, they can last generations with only minor maintenance needed.

Garage Roof Prices

Garage roofs are important when it come to overall price.

There are multiple options for roofing when it comes to a garage, depending on what you like, want and what budget you have:

Cost of a New Garage with a Pitched Roof

A pitched roof is angled at a pitch, similar to those present on houses. They can be either sloped on one side or both.

A standard pitched roof single garage with a tiled roof will begin at around £5,000. However, this price will increase with the quality of the tiles, with some as much as £20,000 for a double-pitched garage, with high-quality roof tiles.

Cost of a New Garage with a Flat Roof

A flat roof is usually constructed of felt and tar, spread over a timber frame. The timber, felt and tar can often be purchased together within a “flat roofing kit”; these start at around £250 for a kit big enough to build a single detached garage roof.

If you wish to purchase these items separately, it will cost around £50 for the timber, £150 for the felt, and £50 for the tar.

Supply Only Costs

Now we're moving on to supply costs for a garage build! Supply costs within building a garage will be varied depending on your choices.

What do the supplies for a garage include?

Beyond the main construction method and the differing styles of roof, we have doors, foundations, and internal structures, which can also affect the price.

Let's take a look at the supply costs:

Prefab Kits

First up are prefab kits, here are the different garage kits available:

Metal Garage Prefab Kits

A metal prefab’s general materials will usually consist of the kit itself. This will include the panels for the walls, roof and fittings (such as screws and bolts).

The prices will range from £250 up to £1,500 for basic kits.

Concrete Garage Prefab Kits

A concrete prefab is similar to a metal prefab when it comes to the general materials. When purchasing the kit, it'll often come with the all fittings needed for construction.

The prices of concrete prefabs range from £1,000 up to £3,000 for basic kits.

Building Materials

Here are the building materials you'll need to build a garage:

Blocks

Blocks are by far the cheapest option for a custom-built garage. If rendered, a block garage will look just the same as a rendered brick-built garage but at a fraction of the cost of brick.

How many blocks will you need to build a garage?

Depending on the size of the garage and design, the number of blocks needed varies. On average around 200 blocks will be required for a single UK sized detached garage.

Blocks will usually cost around £100 per 54 block sets, meaning they cost just under £2 per block.

Brick

Bricks are the middle ground when it comes to the style of blockwork chosen for garage building. Bricks come in a multitude of colours, sizes, and even shapes.

The standard size of bricks, called “house bricks”, are the most common used, with red being the most common colour.

This choice of bricks is usually around £500 to £1,000 per 00 bricks and sold in groups of 250, 500, 750, and 1,000 bricks.

How many bricks are needed to build a garage?

A standard single detached garage will take on average around 500 to 750 bricks, depending on the complexity of the design.

Sand

Why is sand important when building a garage?

When building a brick or block structure, sand is required to make mortar to join the blocks together.

On average, a single garage will take around one ton of sand to build; however, this number does not include the sand required for the concrete foundation.

Sand is not a very expensive material, so affordable builder’s grade sand will only cost around £50 per ton.

Cement

Cement is the other ingredient to mortar, other than sand. For every five parts of sand used, one part of cement is needed. The cost of cement is substantially greater than that of sand, costing around £5 per bag.

How much cement do you need to build a garage?

For a complete single detached garage, it will take around seven bags of cement; this means the total cement costs would be around £35.

Garage Roof Material Costs

Once you've decided on a pitched or flat roof, you also need to consider the material of said roof.

Below we break down the different options:

Plastic & Metal Corrugated Sheet

Plastic corrugated roofing sheets are often a cheaper and easier alternative to using a fully constructed flat roof. They still require a timber frame to be fixed onto, and if taking into account the quicker time of construction, a lot of costs can be saved in labour.

The standard corrugated plastic sheets will cost around £100 for a 2.5 m x 5 m sheet. For the metal equivalent, it will increase the price up to approximately £150 per sheet.

Roof Tiles

Roof tiles vary in price from around £1.85 per tile, up to about £5 per tile for the higher quality custom coloured varieties.

How many roof tiles will you need?

The standard single garage with a pitched roof will take around 1,000 tiles. This would usually cost (with bulk purchase discounts) around £500 for 1,000 tiles, for a standard clay tile set.

Garage Foundation Costs

The simplest form of foundation is a concrete slab; this is a mix of cement and rough course gravel/sand mix. Depending on the depth required (average is around 30 cm depth), the amount of mix required varies.

Working on the average 30 cm depth, it will usually take around two tons of gravel/sand mix, and five bags of cement. For two tons of gravel/sand mix, it will cost around £50 a ton.

Meaning for all the materials needed to lay the slab, it will cost around £125.

Garage Door Costs

All garages need a door in order for a car, and person, to gain access. There are multiple types of door styles to choose from; each one has its varying styles, prices, and uses.

Here's a list of garage doors to choose from:

Up and Over Garage Door

The most common style of garage door used is an “up and over” type.

What's an up and over garage door?

This means the door will open from the bottom and lift upwards sliding back into an area within the ceiling.

By far these are the cheapest and easiest solution to install, with prices starting at £150 and ranging as high as £1,000 for an electric-assisted model.

Roller Garage Doors

Roller doors are the second most popular style of garage door.

These are constructed of strips of wood or metal, and open up from the bottom, into a roll positioned at the top of the door opening.

Being more complicated to install and having a more complex design, a roller doors price is greater than an up-and-over style.

How much are roller doors?

The price of a standard roller door will usually start at around £500 and can increase in price up to around £5,000 for an ultra-secure electrically assisted metal roller door.

Sectional Garage Doors

A sectional garage door look more like a normal door than a garage door, being constructed of various panels and having different ways to open them.

A sectional door is one of the highest-priced garage doors on the market. For a standard tri-folding single garage door, the prices usually begin at around £1,000.

Additional Garage Extension Costs

Materials and labour are not the only costs to consider when building a garage. Building any structure will have additional expenses.

What are the additional costs when building a garage?

If you require your garage to have electricity, you'll have to employ an electrician to fit the supply; this will cost around £150 per day.

Here are some security measures you can add to your garage:

• Security systems
• Outdoor lighting
• CCTV

After the garage is built, you may want the additional jobs done too:

• Guttering
• Concrete driveway

Costs of Hiring a Garage Extension Specialist

When hiring any tradesman for building work, you need to consider what specific jobs actually need doing, as not all tradesmen can handle the same types of work. Building a garage is made up of multiple different trades.

Where should you start?

The most obvious place to start is garage-building specialists; however, this will depend on what style of garage extension you have chosen.

Below is a list of various tradesmen you may require and the jobs they will be undertaking:

Architect or Designer

Why would you need an architect for building a garage?

When planning a new garage extension, unless using a prefab, building designs or drawings will need to be created. Usually, a specialist designer or architect creates the plans; in order to make sure the correct materials, the correct style is used, and you get the results you want.

How much will garage designs costs?

This will take up a large percentage of the labour costs, considering it will be one of the smaller jobs involved. The cost to hire an Architect or specialist designer usually is around £200 per day.

However, they would usually charge by a completed job rather than per day. This would be around £400 to £1,000 for a completed design, drawing, and technical specifications.

Concrete Layer

These are hired when you require a concrete slab for the foundation. Most garages, regardless of choice, will require a form of foundation, and the most common being a concrete slab.

How much will a concrete layer cost on average?

A concrete-layer will usually cost you around £75 per day.

This will depend on the skills and experience of the tradesman.

Generally, this will only take two days to complete the concrete work for a single standard-sized garage. This can increase to up to 6 days if a driveway extension is also planned in concrete.

Bricklayer

These contractors are hired for the construction of brick buildings. They can also often be used in constructing a foundation for the garage. Using a specialist bricklayer, who is experienced in building garage extensions, is often the best option when you want a high-quality, long-lasting garage.

How much do bricklayers charge?

A bricklayer's price for labour usually ranges from £75 to £150 per day, depending on the complexity of the job, the skills they have, and the experience they bring to the job.

General Builder

A general builder is often used to lead the entire project. They can hire and control subcontractors such as bricklayers and carpenters in order to complete the work.

Also...

If building a prefab garage extension, a general builder is often the best choice due to the robust nature of their experience and the labour price, which can be offered.

What will a builder cost?

A general builder will usually cost around £100 to £150 per day to hire, depending on the level of job required, the skills they possess, and the amount of experience.

Tarmac Specialist

Why would you need a tarmac specialist?

Once the garage has been built, it is often necessary for a driveway to be extended, if not created from scratch. In order to do so, you could use the concrete layer (if hired for the foundations); which if laid during the foundation, could save some money.

This will depend on the style of driveway required. If you'd like a tarmac driveway a tarmac specialist will usually cost around £125 per day, dependant on the level of experience and qualifications they possess.

Electrician

An electrician is usually required at the end of the build process if an electrical supply is required. From lighting, electrically assisted doors, and alarms to CCTV systems, an electrician would often be able to assist in the installation of multiple garage upgrades.

The average required time to hire an electrician for would be for around 1 to 3 days, depending on the amount of work required.

How much would an electrician cost?

The day rate for an electrician often starts at around £125 per day, depending on their qualifications and specialities.

Labour Costs & Timescales

One of the most important factors when considering any building work is obviously timescale.

No one wants a job that drags on indefinitely with no idea of when it will be completed.

Also..

The longer a project takes to complete, the greater the final price. Garage extensions are no exception.

Second to this is the price of labour. However, the timescale has a direct effect on the cost of labour, as the longer, a job takes, the longer you will be required to pay your selected tradesman.

What can affect timescale?

There are multiple factors, which can affect the timescale. The most obvious being the complexity of the project, the size of the build, and the final quality of the garage. Choosing to build a brick built garage extension will take almost twice as long as a prefab kit, at around 1 week compared to 3 - 7 days.

A double garage will take longer than a single sized, at around 1 week for a single compared to 2 weeks+ for the double. However, these factors will also depend on the level of complexity in the plan, the skills the tradesman possess, and the amount tradesmen needed to be hired for the project.

Cost Factors of Building a Garage Extension

The cost of labour takes the largest chunk out of your building budget.

However, the other expenses, such as materials, doors, windows, and internal decorations, will also take up a large section.

Materials can easily surpass the price of labour if only the finest materials are selected. The makeup of a garage is extremely customisable, with a choice of materials, colour, shape, design, doors, electric and security.

The planning of your garage will determine many of these factors; however, it is always best to keep a budget in mind before beginning preparations and buying materials. The size of the garage planned will have a direct effect on the final price.

What's the cost difference between a double and single prefab garage?

A double garage will usually cost around twice as much as a single, however, this is not always the case. A double-sized metal prefab kit begins at £500, and the single matching equivalent would begin at around £300.

What else do you have to consider?

Another consideration is the difference in price between an attached and detached, built garage. Attaching a build to your existing property will substantially increase the planning costs and overall difficulty of the job. It is therefore advisable to look into the possibilities of a detached garage wherever possible.

Let's compare the costs of an attached and detached garage!

For a basic single garage extension, attached to your existing building, it will usually cost around £1,300 for materials and £3,500 for labour.

Conversely, for the equivalent single detached garage, it will usually cost £1,500 for materials and £3,000 for labour.

This results in a price difference of £300, with the detached version costing £4,500, and the attached version costing £4,800.

This price difference will often increase as the size and complexity of the garage increases.

Do not forget...

The costs for planning the project and disposal of waste after the completion of the build, should always be accounted for in the budgeting stage.

Waste disposal will usually consist of hiring a skip. A skip is a large metal container used as a bin, for the disposal of building waste. Skip hire begins at around £150 for a single skip hired for a week. Included in the price of the hire, is usually the cost of collection and disposal of the waste.

What's Involved in Building a Garage Extension?

• Budgeting

The first step is going to be planning a budget. This is a very important step, as there is no point starting a project you cannot afford to complete it.

Factors such as materials, labour, and additional expenses need to be calculated at this stage.

• Planning

In the planning stages, you will need to decide where you wish the garage to be built, the style of garage you are going to construct, and the types of tradesmen you will have to hire.

After you have made these decisions, if not using a prefab kit, you will have to hire a specialist to draw up a plan for the project. The plan will allow you to see an approximate cost for the materials, the tradesmen required, and the permissions needed in the construction.

• Quotes

Quotes are vital to any construction project, as not all tradesmen charge the same rates for the same job. It's always best to get at least three quotes from three different companies, in order to ensure you are getting the very best for your money.

• Laying the Foundation

Now the actual work begins!

Firstly, the site will need to be cleared. Then the place where the foundation will be laid will need digging out to the dimensions of the plan.

Once dug, the hole will need filling with the foundation material. This will usually take the form of a concrete slab. Mixing and laying the concrete should only take around a day for a qualified professional, however, the drying time can vary depending on the weather, climate, and strength of the cement used.

• Construction

The construction stage will vary drastically depending on your chosen style of garage. A simple single prefab will need to be laid out and constructed, much like a giant flat-pack piece of furniture.

However, if a more permanent brick built garage has been planned this will be when the brickwork is laid, the roof supports placed, and any internal specialist dimensions are constructed.

• Roof

With the walls now complete, it is time to fix a roof to the build in order to keep the weather out. This step can vary depending on the style of roof chosen.

A tiledroof will need more timber supports than a flat roof, and corrugated sheets are usually just simply screwed into place. This stage will usually take around 1-2 days, however this is very dependent on the weather during the roofing process.

• Fitting the Internals

Doors, electricity, lights, flooring, shelves, and cupboards will now all need to be fitted as required. The door is just as important as the roof; however, most doors will be able to be fitted in just one day.

Lights and other electrical devices will require an electrician to install, and shelving or cupboards will often require a professional to fit.

• Security

Security being one of the most common reasons to build a garage in the first place is one of the final stages of your construction project.

Here you need to have any additional locks, lights, and/or CCTV cameras fitted to the property. This, of course, is an optional extra and is mainly down to the personal preference of your own needs.

• Enjoying Your New Garage

The final step of constructing your new garage extension is to actually enjoy it.

Whether it was constructed to contain a vehicle safely, store random junk, or even just as a place to escape the kids for a minute’s peace; you should not forget to enjoy the new structure you have taken the time and money to build.

Benefits of a Garage

The first and most obvious benefits to a garage are its ability to store a vehicle. Protecting your car from the weather may result in saving you money on cleaning and maintenance. Not to mention protecting your car from thieves and vandals will provide priceless peace of mind during long trips away and at night-time.

Not only are garages a good safe place to store your vehicle, but they also provide a safe place to add additional storage to your property. Many people with garages use them as an extension to their loft spaces, allowing them to store property that may require easier access than an attic can provide.

A further and lesser-considered benefit to a garage is the increase it may bring to the overall value of your property.

The value in which your property will increase is usually only around 5% - 7%; however, this can still turn out to be a substantial amount.

So, what's that in terms of monetary value?

On average, a house valued at around £150,000 without a garage, can increase to approximately £160,000 with the addition of a brick built garage added to the property.

Building Permission for a Garage

Before getting stuck in with any building work such as adding a garage, you need to consider that there are rules governing outbuildings, which apply to sheds and garages, as well as any other garden buildings.

Most outbuildings are considered to be permitted development, so they do not need planning permission, but this is subject to a number of limits and conditions:

• The garage should not be built on land forward of a wall forming the principal elevation of the dwelling house.
• The garage also has to be single-storey with maximum eaves height of 2.5m and maximum overall height of 4m for a pitched roof, 3m for other roofs, or 2.5m if within 2m of the property boundary.
• In addition, if you want to avoid planning applications, you need to avoid any verandas, balconies or raised platforms.

*Note that permitted development does not apply to flats and maisonettes.

Can I Build a Garage Extension Myself?

DIY is always an option!

For the prefab style of garage, this may be a great chance to try your hand at a little construction. Built as most “flat-pack furniture” from a simple kit, with provided instructions, a prefab garage kit can be a straightforward project to attempt yourself.

Does a prefab kit include tools?

Depending on the style of kit you end up purchasing, a variety of tools may be required. For metal prefab garage kits, a simple screwdriver set (£10), spanner set or adjustable spanner (£15), and a stiff broom (£5), may be all the tools you require for its assembly.

A concrete prefab will require a few more tools than its metal counterpart. For a start, screws in the metal kit are usually replaced with bolts or adhesives in the concrete version.

This is due to the weight on the panels increasing. Therefore, you will likely need a socket set (£25) to be added to the tool list.

Furthermore, the greater weight of the kits panels will likely mean you will be unable to construct the kit alone. A standard single concrete prefab will require three grown adults to build, as it will take two to lift and hold the panels in place while the third bolts them together.

What about a brick garage?

A brick garage can be self-built, however this is not a simple undertaking and will require many new skills to be learnt.

From bricklaying, foundation pouring, concreting, roofing, and carpentry; unless you are the type of person that just has to do it yourself, it will be cheaper to simply hire qualified and skilled tradesmen.

Hiring a tradesman to build the exterior does not mean you cannot attempt the interior yourself. Fitting cupboards, shelves, and even the door are all items you could try installing once the difficult building parts are completed.

Garage Removal Cost

The removal of a garage should be considered before its construction.

Whether you no longer require the use of the garage for storage, or you just want the space back, there are a number of reasons to remove a garage. In addition, if you have an old, dilapidated garage already on your property, you may wish to replace it with a newer, nicer looking build.

A simple prefab can usually be torn down by almost anyone, however a brick built garage extension, is by far, more complex.

Either style will require a few basic elements, such as a skip or waste removal, labour, and basic cleaning supplies.

Skip hire will usually cost around £200 for a single skip, hired for a week, with pick up and disposal. This may not be large enough for a built garage, or even a double prefab.

Usually, when demolishing a garage, you will be best served in hiring a tradesman such as a general builder. They can usually provide all the tools needed and even dispose of the waste produced.

An average builder will be able to complete a garage removal within a week. This means it would cost you an average of £700, including the skip hire costs and labour.

Hiring a Builder Checklist

Before opting for a garage extension builder you should consider some factors that may effect the cost.

Below is a checklist to help you when searching for your tradesmen:

• Check for relevant qualifications. Depending on the tradesman hired, these can be in the form of CSCS certification, City and Guild levels, or even college gained qualifications such as HNC’s.
• The most important consideration when hiring any tradesman is insurance. Make sure they possess, at the least, third party liability, which covers building work.
• Ask for evidence of previous work. If they have references from previous clients, photos, or a portfolio of their work, it will prove they are proud of the level of skill they can provide.
• Does the tradesman offer any form of guarantee for the work they are going to undertake? Most will offer in some form or another to make sure you are happy with the job before they finish.

FAQs

Sources

https://hoa.org.uk/advice/guides-for-homeowners/i-am-improving/do-i-need-planning-permission/
https://forums.moneysavingexpert.com/
https://www.planningportal.co.uk/permission/common-projects/outbuildings/is-building-regulations-approval-needed-for-an-outbuilding
https://www.fmb.org.uk/find-a-builder/ultimate-guides-to-home-renovation/garage-conversions-the-ultimate-guide.html