The cost of building a new garage has risen in the last few years. Naturally, building costs vary by size, type, and complexity, so in this article, we’ll cover the cost of building a garage across various regions in the UK. 

To give you an accurate view of costs, we’ll also compare four different types of garages: a single garage with a flat roof, a single garage with a pitched roof, a double garage with a flat roof, and a double garage with a pitched roof.

 

Building A Garage Construction Cost Calculations

In our calculations, we applied a consistent methodology across different regions. The cost comparisons are based on the garage being an extension appended to an existing dwelling, not building a new detached structure.

The typical sizes of garages in the UK are:

• Single – 10 x 18 feet (3m × 5.5m, with a gross external area of 16.5m2)
• Double – 18 x 18 feet (5.5m × 6m, with a gross external area of 33m2)

We have used both of these measurements to calculate the costs in this article.

 

In terms of build specification when using our BuildPartner pricing tool, our pricing calculator gives you three broad options (which can be revised by item at a later point):

• Low spec is a basic finish; e.g. Leyland, Everest, Wickes.
• Mid spec is a standard finish; e.g. Dulux, Hamilton, Slim Line.
• High spec is a high-spec finish; e.g. Farrow & Ball, Fine Line, Siemens.

 

To keep this comparison simple, we have chosen mid spec in all our cost estimations. In addition to this, we have also provided three different benchmarks to show the range you can expect amongst different contractors. These are:

• Low benchmark – smaller companies are generally lower cost but less specialised and with low project management function; good for low/mid-spec projects and tight budgets.

• Mid benchmark – medium-sized companies offer a balanced mix of cost-effectiveness and specialisation; good for mid-range projects for effective execution within moderate budgets.

• High benchmark – larger companies generally have a higher cost base but can handle a wide variety of specialist tasks; good for mid/high-spec projects and project management.

Cost Of Building A Single Garage With A Flat Roof

 

Here’s a table showing the average building costs of a single garage with a flat roof in the UK:

Single Garage With Flat Roof	Total Average Build Cost			Average Cost Per Sq Metre
	Low Benchmark	Mid Benchmark	High Benchmark	Low Benchmark	Mid Benchmark	High Benchmark
East Anglia	£22,709	£23,234	£26,838	£1,376	£1,408	£1,627
London	£26,878	£30,055	£32,987	£1,629	£1,821	£1,999
Midlands	£22,185	£24,202	£26,219	£1,345	£1,467	£1,589
North England	£21,047	£23,948	£25,944	£1,276	£1,451	£1,572
Northern Ireland	£21,378	£22,960	£24,873	£1,276	£1,392	£1,507
Scotland	£21,708	£23,682	£25,655	£1,316	£1,435	£1,555
South East	£23,835	£26,652	£29,252	£1,445	£1,615	£1,773
South West	£22,450	£25,393	£27,870	£1,376	£1,539	£1,689
Wales	£22,192	£24,815	£26,649	£1,345	£1,504	£1,615
Average	£22,709	£24,993	£27,365	£1,376	£1,515	£1,659

All costs exclude VAT.

Here’s what the data shows for the cost of building a single garage with a flat roof:

• It costs 23% more to build a garage in London than in other regions.
• The minimum cost is £21,047 and the maximum cost is £32,987.
• The total average cost is £25,023, or £1,516 per square metre.

Cost Of Building A Single Garage With A Pitched Roof

Here’s a table showing the average building costs of a single garage with a pitched roof in the UK:

Single Garage With Pitched Roof	Total Average Build Cost			Average Cost Per Sq Metre
	Low Benchmark	Mid Benchmark	High Benchmark	Low Benchmark	Mid Benchmark	High Benchmark
East Anglia	£26,880	£29,323	£31,767	£1,629	£1,777	£1,925
London	£32,019	£35,803	£39,296	£1,941	£2,170	£2,382
Midlands	£26,170	£28,549	£30,928	£1,586	£1,730	£1,874
North England	£24,686	£28,245	£30,598	£1,496	£1,712	£1,854
Northern Ireland	£25,137	£26,930	£29,174	£1,496	£1,632	£1,768
Scotland	£25,588	£27,914	£30,240	£1,551	£1,692	£1,833
South East	£28,477	£31,842	£34,949	£1,726	£1,930	£2,118
South West	£26,528	£30,056	£32,989	£1,629	£1,822	£1,999
Wales	£26,176	£29,270	£31,497	£1,586	£1,774	£1,909
Average	£26,851	£29,770	£32,382	£1,627	£1,804	£1,963

All costs exclude VAT.

 

Here’s what the data shows for the cost of building a single garage with a pitched roof:

• The minimum cost is £24,686 and the maximum cost is £39,296.
• The total average cost is £29,668, or £2,382 per square metre.
  

Cost Of Building A Double Garage With A Flat Roof

Here’s a table showing the average building costs of a double garage with a flat roof in the UK:

Double Garage With Flat Roof	Total Average Build Cost			Average Cost Per Sq Metre
	Low Benchmark	Mid Benchmark	High Benchmark	Low Benchmark	Mid Benchmark	High Benchmark
East Anglia	£32,488	£35,442	£38,395	£1,074	£1,172	£1,269
London	£38,620	£43,184	£47,397	£1,277	£1,428	£1,567
Midlands	£31,719	£34,603	£37,487	£1,049	£1,144	£1,239
North England	£30,039	£34,227	£37,079	£993	£1,131	£1,226
Northern Ireland	£30,532	£32,770	£35,501	£1,009	£1,083	£1,174
Scotland	£31,024	£33,844	£36,665	£1,026	£1,119	£1,212
South East	£34,126	£38,159	£41,882	£1,128	£1,261	£1,385
South West	£32,108	£36,328	£39,872	£1,061	£1,201	£1,318
Wales	£31,728	£35,477	£38,119	£1,049	£1,173	£1,260
Average	£32,487	£36,004	£39,155	£1,074	£1,190	£1,294

All costs exclude VAT.

 

Here’s what the data shows for the cost of building a double garage with a flat roof:

• The minimum cost is £30,039 and the maximum cost is £47,397.
• The total average cost is £35,882, or £1,186 per square metre.

 

Cost Of Building A Double Garage With A Pitched Roof

Here’s a table showing the average building costs of a double garage with a pitched roof in the UK:

Double Garage With Pitched Roof	Total Average Build Cost			Average Cost Per Sq Metre
	Low Benchmark	Mid Benchmark	High Benchmark	Low Benchmark	Mid Benchmark	High Benchmark
East Anglia	£39,156	£42,716	£46,276	£1,294	£1,412	£1,530
London	£46,707	£52,227	£57,322	£1,544	£1,727	£1,895
Midlands	£38,076	£41,538	£44,999	£1,259	£1,373	£1,488
North England	£35,840	£41,093	£44,518	£1,185	£1,358	£1,472
Northern Ireland	£36,539	£39,098	£42,356	£1,185	£1,293	£1,400
Scotland	£37,238	£40,624	£44,009	£1,231	£1,343	£1,455
South East	£41,609	£46,526	£51,065	£1,375	£1,538	£1,688
South West	£38,620	£43,784	£48,056	£1,294	£1,447	£1,589
Wales	£38,084	£42,585	£45,859	£1,259	£1,408	£1,516
Average	£39,097	£43,355	£47,162	£1,292	£1,433	£1,559

All costs exclude VAT.

 

Here’s what the data shows for the cost of building a single garage with a pitched roof:

• The minimum cost is £35,840 and the maximum cost is £57,322.
• The total average cost is £43,204, or £1,428 per square metre.

Summary Of The Average Cost To Build A Garage

 

So, how much does it cost to build a new garage in the UK? That depends largely on where you are building. If you’re building a garage in London, it will cost you an average of 23% more, whereas if you’re building in North England, it will cost you around 8% less on average.

Based on the four different types of garages covered in this article, you can expect building a garage to cost on average (when using a mid-benchmark contractor):

• Single with flat roof – £24,993, or £1,515 per square metre
• Single with pitched roof – £29,770, or £1,804 per square metre
• Double with flat roof – £36,004, or £1,190 per square metre
• Double with pitched roof – £43,355, or £1,433 per square metre

You’ll notice that the cost per square metre decreases as the project size increases due to more efficient resource utilisation and lower average costs, leading to economies of scale.

Please remember that these costs are based on appending an extension to an existing dwelling, not building a new detached structure – and all costs exclude VAT.