Build a New Garage Cost & Prices 2021

Garages are in greater demand than ever due to the distinct lack of parking spaces across the UK and they can add significant value to any home and rate as a solid investment in terms of both practical use and value-added to your home. 

Both Leaders and Romans cite that garages can add some 5% to 10% onto the value of a home. In some areas, particularly more built-up areas, adding a garage to your excess land can vastly increase the value of any home and also serve as a platform for additional extensions and/or later conversions. 

In this article, we’ll break down what you can expect to pay for different types of garage as well as other questions relating to building a new garage.

Average Garage Cost Guide

Garages vary hugely in price depending on size, style, building materials, and whether it’s attached or detached. 

The cheapest garages are pre-fab outbuildings made from either steel or timber. These still usually require strong foundations and a concrete base, at least if you want your garage to be a permanent structure and not a glorified shed. 

Prices begin to climb for attached brick or concrete garages that are fitted with insulation, electricity or even heating and plumbing (will definitely need to pass a building inspection).

The average prices for simple detached pre-fab or semi-pre-fab outbuilding-type garages are shown below. Prices include groundwork, concrete bases and professional assembly. 

Average Timber Garage Prices

Quality RangeSingle Detached Timber Garage (3.5m x 6m)Double Detached Timber Garage (6 to 7m x 6 to 7m)
Low-end£3,500 - £4,500£6,500 - £8,000
Mid-range£5,000 - £6,000£8,500 - £10,000
High-end (with tiled roof)£10,000+£15,000+

Average Steel Garage Prices 

Quality RangeSingle Detached Steel Garage
(3.5m x 6m)
Double Detached Steel Garage (6 to 7m x 6 to 7m)
Low-end£2,500 - £3,500£5,000 - £7,000
Mid-range£4,500 - £5,500£8,000 - £10,000
High-end (with tiled roof)£8,000+£15,000+

Brick/Concrete Garage Prices

To analyse the costs of garages in the UK, we collected quotes from 8 contractors and 12 secondary sources to discover the average costs of building brick or concrete garages. 

The following quotes are for attached garage extensions. The costs for detached garages are usually similar or some 5% more expensive than attached garages. This is because the house provides a pre-existing wall and foundation. 

All costs include VAT and full installation works. 

Quality RangeSingle Garage with Flat Roof (3m x 6m)Single Garage with Pitched Roof (3m x 6m)Double Garage with Flat Roof (6m x 6m)Double Garage with Pitched Roof (6 to 8m x 6 to 8m)
Low-end£8,000 - £10,000£9,500 - £12,000£15,000 - £18,000£16,500 - £20,000
Mid-range£10,000 - £12,000£13,000 - £15,000£20,000 - £23,000£21,000 - £25,000
High-end£12,000 - £15,000£15,000 - £18,000£22,000 - £25,000£28,000 - £32,000
High-end+ (incl. tiling, electricity and insulation)£18,000+£20,000+£32,000+£40,000+

Permanent, professionally built brick or concrete garages are more complex to cost. There is much greater variation in size, format, materials and extras. 

Typical factors involved in costing garages include:

  • Foundations and groundwork 
  • Ground floor base/slab
  • External walls
  • Roofing style and materials (felt, tiles, battens)
  • Gable, soffits and fascias 
  • Drainage and gutters 
  • Electricity and wiring
  • Lighting 
  • Garage and access doors 
  • Insulation 
  • Security and other technology 

Types Of Garages

There are a few different types of garages you can build and each can be built from different types of materials. 

Garages can be either single or double, or even triple, and can feature either flat or pitched roofs. 

Garages can be made from metal, concrete or brick and may or may not need timber frames. 

Your choice mainly depends on whether you’re looking for an attached garage (an extension) or a detached garage (an outbuilding).

The 3 most popular types of garages are:

Timber Garages 

Timber frame garages are usually made to measure and delivered to your home for DIY or professional construction. The timber frame is laid on concrete foundations and walled with timber panels. Timber frame garages can have flat or pitched roofs and vary greatly in terms of quality and finishes.  

Timber garages are aesthetically appealing and make ideal detached garage outbuildings. 

They can be equipped with garage doors or left open (like a carport). 

Pros of Timber Garages

  • Cost-effective 
  • Solid aesthetic appeal 
  • Ideal as detached outbuildings 
  • Roof can be tiled 

Cons of Timber Garages

  • Can rarely be attached to a home
  • Poor insulation 
  • Require ongoing maintenance to remain weatherproof 

Concrete or Brick Garages

Concrete and brick garages can be built as extensions or outhouses. They’re the go-to option for professional, permanent garages, have excellent longevity and low maintenance requirements. 

Concrete sectional garages are the cheapest of the category – made from concrete slabs they don’t usually require a timber frame. Concrete garages are extremely durable and require little maintenance, but don’t blend in particularly well with every home. 

Brick garages provide one of the more attractive garage options. They’re more expensive and time-consuming to build but blend in effectively with an existing home. Brick garages are often the only realistic choice for garage extensions. 

Another key advantage of permanent brick or concrete garages are that they’re easily equipped with insulation, electricity and even plumbing. This markedly increases their uses and functionality, but also their cost. 

Pros of Brick or Concrete Garages

  • The go-to permanent option 
  • Can be attached to your existing home
  • Solid aesthetic appeal (especially in the case of brick)
  • Can be fitted out with electricity, insulation and plumbing

Cons of Brick or Concrete Garages

  • Most expensive option 
  • Costs can rise exponentially with added extras 
  • Time-consuming to build

Metal/Steel Garages

The cheapest option. Metal or steel garages are easy to erect and are best used as semi-permanent garden outbuildings. 

Whilst they are weatherproof and can be reasonably well-insulated, they’re not particularly aesthetically appealing. High-end options do bring some class and longevity to steel garages. 

Pros of Metal/Steel Garages 

  • Cheapest option 
  • Easy to install 
  • Strong and durable 
  • Make ideal garden storage outbuildings 

Cons of Metal/Steel Garages

  • Can’t usually be added as a house extension
  • More-or-less semi-permanent unless you choose higher-end options
  • Loud when it rains

Why Build a Garage?

The conventional use of a garage is to store vehicles, but often, they’re simply used for general purpose storage and other practical uses. 

Garages serve as extra space and are far more secure than temporary buildings like sheds. 

They’re well-insulated, weatherproof and are often served by mains power. 

Garages are a cost-effective way to add a large room to a house. They rate as exceptionally good value given the demand for garages and parking spaces in general. 

Average Garage Size 

It’s useful to know the standard sizes of typical garages so you can assess whether or not you have space to add one to your home. 

Most garages are standard-sized but detached garages allow for much greater variation, particularly on larger plots of land. 

  • The average one-car garage is typically at least 3m x 6m in area and 2.2m to 2.5m tall
  • A double-space garage is typically at least 6m x 6m in area and 2.2m to 2.5m tall
  • Pitched roofs can increase the total garage height to 3.5m or more 

Do I Need Planning Permission to Build a Garage?

There is a great deal of misinformation and confusion surrounding this topic, primarily because garages are classed as either outbuildings or single-storey extensions.

  • Garages are classed at outbuildings when they’re not connected to the house (i.e. detached). 
  • Garages are classed as single-storey extensions when they are connected to the house (i.e. attached). 
  • Both outbuildings and single-storey extensions are covered by Permitted Development Rights (PDRs) but different rules and conditions apply.

Garages built as outbuildings do not require Planning Permission, subject to the following conditions:

  • Single-story garages can have a max eaves height of 2.5m or 4m with a dual pitched roof or 3m with other types of roof. 
  • Max height of 2.5m if the garage is within 2m of the boundary 
  • No verandas or balconies on the garage roof
  • Cannot cover more than half the area around the original house (which will include other pre-existing outbuildings)
  • In some designated areas, e.g. National Parks, Areas of Outstanding Natural Beauty or World Heritage Sites, outbuildings positioned beyond 20m of the house may not be bigger than 10m2
  • In other designated areas, PDRs don’t apply at all – you will need to check with your planning authority 
  • Other rules and conditions apply to listed buildings
  • Full details on the Planning Portal

Garages built as extensions also do not require Planning Permission, subject to the following conditions:

  • Materials used must be broadly continuous with the overall design of the house (effectively rules out bolting a cheap steel garage onto a brick house, for example)
  • The garage cannot exceed 4m in height 
  • Must not be closer to a public highway than the original house
  • Garages extended to the side cannot be wider than half the width of the original house 
  • Cannot extend garages beyond the rear wall by more than 4m for a detached house or 3m for any other house
  • Cannot extend beyond halfway into any garden area
  • Other rules and conditions apply to National Parks, AONBs, etc, as well as designated land and listed buildings 
  • Full details on the Planning Portal

Garages may also be subject to Building Regulations. According to the Planning Portal, garages built as extensions nearly always need building regulation approval (mainly concerning energy efficiency and safety).

Garages built as outbuildings typically require approval unless they’re smaller than 30m2, contain no sleeping arrangements or are not otherwise designed for living. They must be constructed from reasonably non-combustible material. 

It’s crucial that you consult your contractor on both Planning Permission and Building Regulations. 

Larger garage projects may also require the service of a surveyor. 

It’s wise to obtain a Lawful Development Certificate prior to undertaking any works – some contractors require this.  

You may also need to consider the Party Wall Act where works interfere or involve a neighbouring building’s walls. 

How Long Does it Take to Build a Garage?

Simple pre-fab detached garages can be constructed over just 2 to 3 days. 

Brick or concrete attached or detached garages require considerably more work and can take upwards of 2 weeks to a month or longer to complete, particularly if wiring and insulation are required. The rough garage production process is as follows:

  1. Dig foundations and perform groundwork 
  2. Lay the concrete base and raise the floor to house height if necessary 
  3. Build the frame
  4. Complete the roof
  5. Install guttering and drainage
  6. Build the walls 
  7. Insulate the walls and roof
  8. Lay flooring if necessary 
  9. Complete electricity and plumbing work 
  10. Exterior finishing 

Choosing a Garage Builder

When you’re choosing a garage builder, look for someone with a proven track record and portfolio of successful projects. 

Always make sure that you’re absolutely clear on Planning Permission and Party Walls. 

If you are concerned about whether or not your project is legally viable under PDRs then consider enlisting a surveyor. You will need to alert the planning authority of your plans. 

Request a full timeline of the works with a total estimate on how long it will take from start to finish. 

To speed up the Building Regulations process, contractors and any subcontractors might be registered under the Competent Persons Scheme which allows them to self-certify the work, however building inspections may still be required. 

Get Prices on a Building New Garage Near You

We’ve done our best to give you a good idea of what you can expect to pay a builder for a new garage.

However, our guides are not a substitute for a fixed quote specifically for you.

We work with all the best garage builders ready to price your job. Get free, no-obligation quotes in your local area and compare prices using the form below.

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