How Much Does a Pergola Cost in the UK? (2026 Guide)

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A pergola is one of the most effective ways to add structure and character to a garden without committing to a full enclosed building. Whether you're looking to frame a seating area, support climbing plants, or create a defined outdoor dining space, a pergola delivers a significant visual impact for a relatively modest outlay — if you choose the right one.

The challenge is that pergola prices span an enormous range. A basic flat-pack timber kit can cost under £1,000 installed. A bespoke aluminium louvred pergola with integrated LED lighting and a motorised roof can run to £15,000 or more. This guide helps you understand what you're actually comparing when you see those numbers.

A pergola in the UK typically costs between £800 and £15,000 installed, depending on size, material, and specification. A standard 3m x 3m timber pergola costs around £1,500–£4,000 installed. Aluminium louvred pergolas — the premium option — typically start at £5,000 and can exceed £15,000 for larger bespoke structures.

Average Pergola Costs in the UK (2026)

Here's a breakdown of typical installed costs by material and size:

Type	Small (3m x 3m)	Medium (4m x 3m)	Large (5m x 4m+)
Timber (kit)	£800–£2,000	£1,500–£3,000	£2,500–£5,000
Timber (bespoke)	£2,500–£5,000	£4,000–£8,000	£6,000–£12,000
Aluminium (louvred)	£4,000–£7,000	£6,000–£10,000	£10,000–£18,000+

These figures include basic installation. Additional costs — groundwork, electrical connections for lighting, or decking/patio beneath the structure — are separate. If you're having a pergola fitted over an existing patio, installation is simpler and cheaper than if the ground needs preparing first.

Timber vs Aluminium Pergolas: Which Is Right for You?

Timber Pergolas

Timber remains the most popular choice and suits the majority of UK gardens well. Pressure-treated softwood is the most affordable option and widely available in kit form — most can be assembled by a competent DIYer over a weekend. Hardwood pergolas (oak, iroko, or similar) cost considerably more but weather beautifully and can last for decades with minimal maintenance.

The main drawback with timber is ongoing maintenance. Softwood pergolas need treating every two to three years to maintain their appearance and resist rot. Left untreated, they'll become grey and weathered — some people like this look, others don't.

Aluminium Louvred Pergolas

Aluminium louvred pergolas are the premium end of the market and have grown significantly in popularity over the past five years. The key feature is a motorised or manually adjustable louvred roof that allows you to control the amount of light and rain entering the space — effectively turning an outdoor area into a genuinely all-weather room without the cost and planning requirements of a full extension.

Quality aluminium pergolas are powder-coated and require essentially no maintenance beyond an occasional wash. Many include integrated guttering, so rainwater is channelled away cleanly rather than dripping off the edges. LED lighting and integrated heating can be added to extend usability into the evening and cooler months.

The cost premium is significant — typically three to five times more than a comparable timber structure. But for a sheltered, year-round outdoor dining or entertaining space, they represent genuine value compared to the alternative of a full building project.

What Affects the Cost of a Pergola?

Size

The footprint is the primary cost driver. A 3m x 3m pergola provides enough coverage for a small seating area or bistro table. A 4m x 3m is more practical for a standard garden dining set. Anything larger starts to feel more like a covered terrace than a pergola, and costs increase accordingly. Unlike garden buildings, pergolas don't require a base — which keeps groundwork costs lower — but post footings still need to be adequate for the structure's size and any wind loading.

Post Depth and Footings

Pergola posts need to be properly anchored. Surface-mounted post bases (bolted to an existing patio slab) are the cheapest option and work well for smaller structures. For larger pergolas, or those in exposed locations, setting posts in concrete to a depth of 600mm or more is advisable. Digging post holes in an established garden — particularly through clay or near existing roots — adds to labour time and cost.

Roof Style

An open-beam pergola roof (the traditional style with widely spaced rafters) provides shade and structure without blocking the sky — ideal for supporting climbing plants like wisteria or roses. A closely spaced or solid roof panel gives more weather protection but is more expensive and may require planning permission if it effectively creates a roofed structure. Polycarbonate or glass roof panels sit between the two: they keep rain off while letting light through, at a cost of £500–£2,000 depending on coverage area.

Extras: Lighting, Heating, and Screens

A basic timber pergola can be significantly enhanced with additions. String lights or low-voltage LED strips integrated into the beams add atmosphere and cost £200–£800 depending on the system. Outdoor heaters — either wall-mounted electric infrared or freestanding gas — extend the usable season. Timber or polyrattan privacy screens on one or more sides add wind protection and cost £200–£600 per panel installed.

Do You Need Planning Permission for a Pergola?

In most cases, no. An open-framed pergola with no solid roof panels is generally considered a garden ornament and falls outside the scope of permitted development rules for outbuildings. However, planning permission may be required if:

The structure has a solid or near-solid roof (making it a roofed outbuilding)
It covers more than 50% of the garden area
The property is listed or in a conservation area
It's attached to the house and forms part of the building's envelope

If in doubt, contact your local planning authority before ordering. A quick pre-application enquiry is free and avoids the cost of building something that has to come down.

Can You DIY a Pergola?

A timber kit pergola is one of the more DIY-friendly garden projects, provided you're comfortable with basic carpentry and post setting. Most manufacturers provide clear instructions and the components arrive pre-cut. The main tasks — setting post footings, assembling the frame, and fixing the rafters — are within the capability of a reasonably competent DIYer with a helper.

Savings can be significant: a kit that costs £1,200 in materials might cost £2,500–£3,500 installed by a contractor. That said, getting the posts perfectly level and square is critical — mistakes at this stage are difficult to correct later. If you're not confident about this, it's worth paying for at least the groundwork and post setting, then completing the frame yourself.

How to Save Money on a Pergola

Choose a kit over bespoke — pre-engineered kits are significantly cheaper and well-suited to standard garden sizes
Install over an existing patio to avoid groundwork costs — see our guide to patio costs if you need a new base first
Use softwood rather than hardwood and treat it yourself after installation
Keep the roof open rather than adding polycarbonate panels — it's cheaper and suits climbing plants well
Add lighting yourself using low-voltage LED strip kits — straightforward to install and much cheaper than having it wired in
Get quotes in late autumn or winter when garden contractors are quieter

Finding a Pergola Installer

For a kit pergola, a general handyman or carpenter will typically be able to handle installation. For bespoke timber or aluminium structures, look for contractors who specialise in garden buildings and outdoor living — they'll understand wind loading, post depth requirements, and drainage in a way that a generalist may not.

For aluminium louvred pergolas, most suppliers work with approved installers and may include installation in their quoted price. Always confirm what's included before signing — groundwork, electrical connections, and guttering are common extras that can add meaningfully to the final cost.

About the Author

James Hartley has spent over two decades renovating and landscaping residential gardens across the UK. He built The Garden Cost Guide to give homeowners straightforward, no-nonsense pricing information they can actually use.