February 28th, 2025

Building a porch is a great way to enhance your home’s kerb appeal, add extra storage, and improve insulation (heat loss through windows and doors accounts for 20–30% of the whole heat loss of house). A porch also improves home security by adding an extra layer of protection.

 

But costs can vary widely depending on size, materials, and whether the structure is enclosed or open. In this guide, we’ll break down the key factors affecting porch costs in the UK, comparing four different types of porches:

 

• Brick porch – constructed with bricks.
• Rendered porch – built with blocks and a rendered finish.
• Timber porch (enclosed) – made primarily from wood.
• Open porch – without enclosed walls, and offering an external shelter.

 

Here's a breakdown of the costs for different types of porches, so you can determine which option best suits your project.

 

Building A Porch Construction Cost Calculations

 

Our cost comparisons are based on a gross external floor area (GEFA) of 3m². The only exception is the open porch, which is based on a GEFA of 2m2. Since an open porch is primarily an aesthetic shelter, a smaller size better reflects its typical usage.

 

In terms of build specification BuildPartner pricing tool 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 Brick Porch

Here’s a table showing the average cost of building a 3m2 brick porch in the UK:

Brick Porch	Total Average Build Cost			Average Cost Per Sq Metre
	Low Benchmark	Mid Benchmark	High Benchmark	Low Benchmark	Mid Benchmark	High Benchmark
East Anglia	£7,582	£8,276	£8,961	£2,527	£2,759	£2,987
Greater London	£8,170	£9,427	£9,553	£2,723	£3,142	£3,184
Inner London	£8,176	£9,275	£9,988	£2,725	£3,092	£3,329
Midlands	£7,377	£8,048	£8,719	£2,459	£2,683	£2,906
North England	£7,182	£7,857	£8,488	£2,394	£2,619	£2,829
Northern Ireland	£7,465	£8,179	£8,860	£2,499	£2,726	£2,953
Scotland	£7,432	£8,108	£8,784	£2,477	£2,703	£2,928
South East	£7,284	£8,145	£9,037	£2,639	£2,951	£3,239
South West	£7,421	£8,560	£9,395	£2,552	£2,853	£3,132
Wales	£7,187	£8,036	£8,616	£2,396	£2,679	£2,872
Average	£7,528	£8,391	£9,040	£2,539	£2,821	£3,036

All costs exclude VAT.

 

Here’s what the data shows for the cost of building a brick porch:

 

• It costs 13% more to build a porch in London than in other regions.
• The minimum cost is £7,182, and the maximum cost is £9,988.
• The total average cost is £8,320, or £2,799 per square metre.

 

Start your free trial with BuildPartner today to get the most accurate estimate of your construction project.

 

Cost Of Building A Timber Porch

 

Here’s a table showing the average cost of building a 3m2 timber porch in the UK:

Timber Porch (Enclosed)	Total Average Build Cost			Average Cost Per Sq Metre
	Low Benchmark	Mid Benchmark	High Benchmark	Low Benchmark	Mid Benchmark	High Benchmark
East Anglia	£6,268	£6,842	£7,407	£2,089	£2,281	£2,469
Greater London	£6,702	£7,609	£8,042	£2,234	£2,536	£2,681
Inner London	£6,812	£7,653	£8,319	£2,271	£2,551	£2,773
Midlands	£6,140	£6,698	£7,257	£2,047	£2,233	£2,419
North England	£6,038	£6,588	£7,136	£2,013	£2,196	£2,379
Northern Ireland	£6,233	£6,773	£7,338	£2,070	£2,258	£2,446
Scotland	£6,257	£6,825	£7,394	£2,086	£2,275	£2,465
South East	£6,037	£6,750	£7,409	£2,187	£2,446	£2,684
South West	£6,171	£7,069	£7,759	£2,107	£2,356	£2,586
Wales	£6,019	£6,730	£7,206	£2,006	£2,243	£2,402
Average	£6,268	£6,954	£7,527	£2,111	£2,338	£2,530

All costs exclude VAT.

 

Here’s what the data shows for the cost of building a timber porch:

 

• The minimum cost is £6,019, and the maximum cost is £8,319.
• The total average cost is £6,916, or £2,326 per square metre.

 

Cost Of Building A Rendered Porch

 

Here’s a table showing the average cost of building a 3m2 rendered porch in the UK:

Rendered Porch	Total Average Build Cost			Average Cost Per Sq Metre
	Low Benchmark	Mid Benchmark	High Benchmark	Low Benchmark	Mid Benchmark	High Benchmark
East Anglia	£5,298	£5,784	£6,261	£1,766	£1,928	£2,087
Greater London	£5,747	£6,428	£6,713	£1,916	£2,143	£2,238
Inner London	£5,738	£6,465	£7,010	£1,913	£2,155	£2,337
Midlands	£5,160	£5,629	£6,098	£1,720	£1,876	£2,033
North England	£5,025	£5,494	£5,938	£1,675	£1,831	£1,979
Northern Ireland	£4,924	£5,384	£5,820	£1,641	£1,795	£1,940
Scotland	£5,209	£5,683	£6,157	£1,736	£1,894	£2,052
South East	£5,111	£5,715	£6,341	£1,704	£1,905	£2,114
South West	£5,185	£5,975	£6,558	£1,728	£1,992	£2,186
Wales	£5,027	£5,621	£6,030	£1,676	£1,874	£2,010
Average	£5,242	£5,818	£6,293	£1,747	£1,939	£2,098

All costs exclude VAT.

 

Here’s what the data shows for the cost of building a rendered porch:

 

• The minimum cost is £4,924, and the maximum cost is £7,010.
• The total average cost is £5,784, or £1,928 per square metre.

 

Cost Of Building An Open Porch

 

Here’s a table showing the average cost of building a 2m2 open porch:

Open Porch	Total Average Build Cost			Average Cost Per Sq Metre
	Low Benchmark	Mid Benchmark	High Benchmark	Low Benchmark	Mid Benchmark	High Benchmark
East Anglia	£3,439	£3,751	£4,064	£1,719	£1,876	£2,032
Greater London	£3,741	£4,254	£4,344	£1,871	£2,127	£2,172
Inner London	£3,755	£4,312	£4,552	£1,877	£2,156	£2,276
Midlands	£3,325	£3,628	£3,930	£1,663	£1,814	£1,965
North England	£3,254	£3,550	£3,846	£1,627	£1,775	£1,923
Northern Ireland	£3,358	£3,705	£4,013	£1,698	£1,852	£2,007
Scotland	£3,321	£3,623	£3,924	£1,660	£1,811	£1,962
South East	£3,327	£3,721	£4,128	£1,808	£2,022	£2,219
South West	£3,367	£3,918	£4,301	£1,752	£1,959	£2,150
Wales	£3,295	£3,612	£3,880	£1,615	£1,806	£1,940
Average	£3,418	£3,807	£4,098	£1,729	£1,920	£2,065

 

All costs exclude VAT.

 

Here’s what the data shows for the cost of building an open porch:

 

• The minimum cost is £3,254, and the maximum cost is £4,552.
• The total average cost is £3,755, or £1,905 per square metre.

 

Summary Of The Average Cost To Build A Porch

So, how much does it cost to build a new porch in the UK? That depends largely on where you are building. If you’re building a porch in London, it will cost you an average of 13% more.

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

• Brick porch – £8,391, or £2,821 per square metre
• Timber porch – £6,954, or £2,338 per square metre
• Rendered porch – £5,818, or £1,939 per square metre
• Open porch – £3,807, or £1,920 per square metre

Please remember that all costs exclude VAT.

 

Start your free trial with BuildPartner today to get the most accurate estimate of your construction project.

 

Frequently Asked Questions About Building A Porch

Here are some frequently asked questions about building a porch.

Can a porch prevent heat loss in my home?

Building a porch improves energy efficiency by creating an air buffer that traps cold air before it reaches your main entrance. It also acts as a thermal barrier, providing an additional layer of protection against the elements. 

The most energy-efficient porches are made from brick and timber, which benefit from greater thermal mass to regulate temperature. uPVC is less efficient without high-quality glazing and seals.

Does adding a porch increase security and reduce the risk of burglary?

If you keep your existing front door, the porch effectively provides double security—a potential intruder would have to get past both the porch and your door to gain entry. This added barrier can significantly deter burglars. 

Is a porch good for storage?

A porch is great for storage because it can act as a cloakroom or boot room, providing space for coats, boots, bags, and outdoor gear. No more coats draped over chairs or shoes scattered around the hallway—it's a purposeful space for your outdoor items.

What are the downsides of getting a uPVC porch?

uPVC porches are generally less energy-efficient and can allow more heat to escape. Additionally, while uPVC porches can last 20 to 30 years, they can become brittle, yellow, or fade with age, especially when exposed to harsh weather conditions. They aren’t as visually appealing as natural materials like brick or timber.