The Cost to Build a Porch

All you need to know about building a Porch extension including costs of materials, labour and time frames.

Porch Cost

What the job entails

One of the simplest extension projects for your home is to build a porch. Making the most of an entrance with a porch is a great looking addition which also offers additional space for bags, coats and boots (plus a handy area for parcels to be left when you are out!). A well thought out porch is not only affordable (as far as extensions go), but will also be an elegant addition to your home. A porch can also add to your home’s value and give it some additional curb appeal if you ever sell. But even though a porch is probably the easiest and cheapest home extension project, there are still potential pitfalls and you also have to be careful about overpaying unscrupulous builders! Hopefully this article will help you to decide on your new porch, plus help you avoid any potential problems while ensuring you pay a reasonable price.

When adding a new porch you need to consider that even if the same materials are used, it may not match the existing exterior of your home very well if the brickwork or plaster is old and grubby. So this would be a good time to have the exterior painted, which will also mean any cracks or loose plaster/mortar will need to also be taken care of. In general you want to spruce up the exterior so the new porch does not stick out like a sore thumb!

When choosing a new porch, one of the most important decisions you have to make is the size, getting this right is crucial. Typically, porches should be a minimum of 1.2m wide and up to 3m deep (any more than this then you are looking at a full front extension which will require planning permission). Most porch projects will feature a dwarf wall made of brick, have a concrete floor, partial glazing, a tiled roof and a security front door. Costs for this type of construction vary from around £800 to £1500 per square metre, but you can of choose a different type of porch. As long as the proposed porch area is 3 metres squared or less, it is unlikely you will require planning permission (though you should always check).

As effectively a small extension, a porch is relatively straightforward to build, but still beyond the scope of all but the most experienced DIY enthusiasts. Most porches will have brickwork to waist height with the upper half glazed. The cheapest form of roofing is a flat roof but a Victorian or Edwardian style pitched roof is much more attractive (and expensive). Once the basic structure is in place, you will need to plaster the interior then fit flooring, with wooden or laminate flooring being the most popular choice for an entrance due to easy cleaning. Finally, you will need to do the decoration and any exterior plaster repairs and painting.

Fixing a new porch to the exterior wall will likely cause damage to the existing plastering/harling, so make sure that making this damage good is included in the quotation, or at least be forewarned and put aside the necessary funds. In addition, ensure that proper damp proofing is in place when the dwarf wall is constructed. Failure to use proper damp-proofing techniques could mean damp using the dwarf wall in the porch to circumnavigate the damp proof course and penetrate the walls of your home.

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The Cost to Construct a Porch

This information was collated from a combination of online sources and tradesman around the UK. But you should note that the figures provided are only a rough guide as there are several factors which will affect exactly how much your new porch will cost.

The actual price will depend on your location, if the porch is fully enclosed or not, if partially or fully glazed, the materials used (for example the type of wood cladding or external brickwork), and whether a flat roof or a sloping tiled roof. In addition, if you are replacing an existing porch rather than adding a new one, then this will cost more as the old porch has to be demolished and the materials removed.

The average specialist will usually charge around £150-£200 per day in labour. Typically, builders will often work in a pair or as a small team of 3-4 workers to complete the job but can occasionally work on their own depending on the size of the porch being built.

Below are some estimated costs of hiring a tradesman to build a porch:

Porch Type Avg. Cost Duration
Lean-to type uPVC Porch £2500 1-2 weeks
Flat Gable Roof Porch £3500 1-2 weeks
Gable uPVC Roof Porch £2500 1-2 weeks
Edwardian uPVC Porch £3000 1-2 weeks

Cost Breakdown

Individual costs of building a Small Gable uPVC Roof Porch - Total Cost: £3500






Waste Removal


You normally don't need to obtain a planning permission for your porch extension, as long as the proposed porch will not exceed 3 square meters in ground area, or be over 3 meters high and less than 2 meters from the nearest boundary wall. But you should always double check with your local planning department in any case. Of course, if your house is a listed property, or in a conservation area, you will need consent before adding the porch. If the porch is separated from the house by an internal door and not heated, then it will not require building regulations certification either. But if you add an electrical supply to the porch in the form of lighting or an additional electrical socket, then you must either use a Part P registered electrician who can certify the work, or have the job inspected by the building control department.
Building a porch is one of the simplest and most economical ways of adding some extra space. In addition, a high-quality porch makes the entrance look more appealing and will help to make a good impression when selling or if you have any guests. A porch can also make your home more energy efficient by reducing heat loss through the front door in the winter. last but not least, a porch gives you somewhere to store all those coats, shoes & boots.
For most, the perfect size is 2.5 to 3 square metres. This offers enough room for coats and boots or even a bike or two - but is still small enough to avoid the additional costs and potential pitfalls of planning permission.