How Much Do Sliding Patio Doors Cost in 2024? What to Budget for Sliding Door Options & Installation

How much do sliding patio doors cost in the UK? Find out what makes a good quality sliding door system, and what you should budget to install it with our complete guide to materials, glazing specification and more
Chris Bates, Editor of Build It magazine
by Chris Batesmith
28th April 2024

Type ‘how much do sliding patio door cost?’ into to your favourite search engine, and you’ll be greeted with all manner of articles purporting to share accurate information on what you’ll pay for sliding doors. Trouble is, most of these rely on readily-available price lists from DIY stores and other entry-level suppliers. Many of these companies sell based exclusively on price, and offer only the most basic of sliding door designs, built with cheaper materials.

If you’re self building, extending or renovating your own home, chances are you’re looking for good quality products that support your ambitions in terms of energy performance, aesthetics, durability, security and more. In other words, the bottom-end products won’t cut it – and price guides based on them won’t help you plan your budget effectively.

In this article, we want to help you understand what it will really cost to install a good-quality sliding patio door system – the kind you’ll actually want to live with if you’re doing a project for yourself. Here’s how much sliding patio doors cost in the UK – from frame materials to the glazing spec, ironmongery and more.

How Does Frame Material Influence the Cost of Sliding Patio Doors?

Materials matter with sliding patio doors. There’s a good reason most quality products are either aluminium or composite (such as alu-clad timber or PVCu-clad aluminium). These sliding door systems offer superior strength and rigidity, so can cope comfortably with the big spans and panel sizes most people are looking for in sliding patio doors. What’s more, they do so in relatively slim profiles, giving you the best views out.

When it comes to windows, good plastic units offer a cost-effective, low-maintenance choice – especially for replacements – and modern versions can look impressive. But doors are a different kettle of fish. They’re much larger, so it stands to reason they need to be more rigid and robust to ensure good service over their lifetime.

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How Much Do Sliding Patio Doors Cost in 2024? What to Budget for Sliding Door Options & Installation

This project features a double-glazed Uberslide door from Kloeber, as part of a corner system alongside a fixed panel. The specification included PAS 24 and solar control glass, but trickle vents weren’t required. On a similar project, the Uberslide might cost around £10,130 + VAT, and the fixed panel approx £3,490 + VAT

“It’s not just that PVCu isn’t as aesthetically pleasing for doors, with thicker sightlines,” says Matt Higgs, managing director at Kloeber. “Plastic sliding patio doors are more susceptible to movement and expansion/contraction – they’re not as stable as aluminium or composite designs.” It’s a similar story for timber; even engineered softwood versions can’t match the spanning capabilities, slender sightlines and ultra robustness of aluminium and composite products.

“For most homeowners, the two biggest factors are sightliness and energy performance,” says Craig Luff, managing director at Ecohaus. “The slimmest sliders look fantastic, with profiles of just 20mm-25mm, but they might not suit a really low-energy build.” Ecohaus’ ultra-slim Visiline thermally-broken aluminium sliding patio doors can achieve a U-value of around 1.1-1.2 W/m²K, for example, which will suit many projects. Meanwhile, its composite lift-and-slide Internorm products get down to 0.7 W/m²K (ie Passivhaus levels of efficiency), but with thicker frame profiles.

Visit showrooms or past projects to see and use doors you like in person. Scrutinise the quality of the jointing systems and ask to see certifications to verify, for instance, how airtight and weathertight the sliding doors are. Lift-and-slide doors press down into a gasket when closed, as opposed to sliding into a channel fitted with brush gaskets, which can offer an edge in airtightness. Ask about warranties, too, and what happens if the doors are damaged – how easy would the glass be to replace, for instance?

The quality of the running gear that enables you to slide the door back and forth is another key aspect to interrogate. What are the rolling mechanisms made of, for instance? Steel is generally more hardwearing than nylon, but the latter may be appropriate depending on the size and type of door.

Ultimately, you shouldn’t expect to get a good quality, stylish sliding patio door at a bargain price. If the cost seems low, there’s likely to be a reason for it – and you should be particularly wary when it comes to super-slim doors “When you’re going to really narrow profiles, at the cheaper end of the market you could be risking the quality and rigidity of the door,” says Matt.

How Does Size Impact the Price of Sliding Patio Doors?

The biggest factor in the price of a sliding patio door system is size. “We’re currently doing anything from 3m wide up to 15m or more,” says Matt. “But I’d say an average sliding door might be 4m or 5m wide, and 2.1m or 2.2m tall.” This is probably a sweet spot for many extension projects and would most likely lead you towards a two-panel door, which will offer optimum balance between performance and sightlines.

Some homeowners may prefer a three-panel sliding door at this kind of size – perhaps to match the frames up with another architectural feature, or to enable more of the aperture to be opened. A twin-panel sliding door will give you a 50% open aperture, while a three-panel system will achieve 66%. “But if you have too many doors, you may as well switch to a bifold, which can open even wider,” says Matt. And from a cost perspective, bear in mind three doors means more tracks and more mechanism – so it will inevitably be pricier.

Read More: Glazed Door Guide: Patio Door Styles, Costs & Considerations

How Much Do Sliding Patio Doors Cost in 2024? What to Budget for Sliding Door Options & Installation

A three-panel set of IDSystems’ theEDGE2.0 ultra-slim sliders in RAL anthracite grey, with laminated glass and PAS 24 locks, installed into an extension and renovation in South London. The system measures 3,223mm (W) x 2,617mm (H), with each panel approximately 1,074mm wide, and all three doors can slide. An equivalent system would start at around £6,650 + VAT (including installation). Photo: Selencky Parsons Architects / Siobhan Doran Photography

Many premium sliding patio doors offer a max individual panel width of around 2.5m to 3m (though some can be bigger). “How wide the system can go is a good indicator of build quality,” says Craig, who recommends checking what the doors look like when closed before selecting the best configuration. “If you’re going with a slimline aluminium product, a triple track might suit you, even on a 4m or 5m door, because there’s still relatively little frame on show.” Three panels means a triple track and extra mechanism, pushing the price up, but if it fits your project goals, then it’ll be worth the money.

Those of you self building a new house might be looking for a mix of sliding patio door sizes. Perhaps a small system for the bedroom, leading out onto a balcony, but a much bigger set across the back of the house to capture views and provide access to the garden. Clearly, one of these will cost considerably more than the other. Purchasing them together (perhaps as a package alongside your windows) may well be the most cost-effective route both for the products and installation.

Perhaps surprisingly, the glass isn’t the most expensive part of good-quality sliding patio doors. “Much of the cost is in the mechanisms and frame,” says Matt. “Generally, if there’s less framework, less rolling mechanism and the door is simpler looking, then it’s likely to be more cost-effective.” So, for an average-sized sliding door, it will usually be cheaper to go for fewer panels. The exception comes when you’re dealing with bigger glass panels, which can be quite pricey and heavy – meaning you need a stronger system to take the weight.

CLOSER LOOK How much do sliding patio doors cost?

These are indicative costs for various sizes of sliding door system. We’ve not attempted to compare the exact specifications of each system in this table, as it would be too much information. So, be aware that you should always seek project-specific quotes, and prices will depend on factors such as thermal performance, glazing spec, locking mechanisms, threshold type etc. Nevertheless, the information below should give you a good yardstick for planning your budget.

SystemSupplierSize (w x h)ConfigurationSupply price (double-glazed)Supply price (triple-glazed)
Visiline (aluminium bonded)Ecohaus3,500mm x 2,200mm2 panel double track£3,300 + VAT£5,800 + VAT
KustomSlide Mono (aluminium)Kloeber4,000mm x 2,200mm2 panel (1 sliding, 1 fixed)£5,385 + VAT£6,315 + VAT
Visiline (aluminium bonded)Ecohaus5,500mm x 2,200mm3 panel triple track£5,900 + VAT£10,200 + VAT
theEDGE2.0 (aluminium part-bonded)IDSystems6,000mm x 2,200mm3 or 4 panels£12,225 + VAT*n/a
theEDGE2.0 (aluminium part-bonded)IDSystems6,000mm x 2,200mm2 panels£15,150 + VAT*n/a
KustomSlide Mono (aluminium)Kloeber8,000mm x 2,200mm4 panel (2 sliding, 2 fixed)£11,710 + VAT£13,850 + VAT

*includes fitting

How Much Do Double-Glazed Sliding Doors Cost vs Triple-Glazed Models?

Quality double glazed sliding patio doors offer very good performance out of the box, so you don’t need triple glazing to meet Building Regs standards. But if you want to go beyond that, what’s the cost uplift between double and triple glazing?

“It’s difficult to provide an exact figure, but with our KustomSlide system you might be looking at paying another £100 per m² of glass for triple glazing, as we just need a different-size glass bead,” says Matt. The price increase would be bigger on Kloeber’s ultra-slim sliders, however. Like many narrow-profile doors, these use a bonded construction for the glass and aluminium framework.

Ecohaus’s slimline doors are also bonded. “A double-glazed pane might be 200kg, but triple glazing 300kg or more,” says Craig. “Our Visiline 2 and Visiline 3 are therefore completely different doors; the wheels we use for a triple-glazed system are completely different, for instance. So, it’s more of an uplift than just paying for an extra pane of glass.”

Renovation and Extension to Rural Victorian Cottage

Kevin Adams and Lucy Miller gutted an old stone building on their family’s farmland to transform it into a beautiful new home. The cottage has been transformed into an open-plan kitchen-living-dining space, with rooflights and glazed sliding doors bringing in ample natural light. Photo: David Barbour

“Size is the key factor when pricing up sliding patio doors, but within that are subtle factors like the weight of the glass and any need for lifting equipment to enable installation,” says David Clarke, marketing manager at IDSystems. “This can be a significant hidden cost, particularly with triple glazing.” Bear in mind, too, that if a door needs triple glazing simply to meet the Regs, chances are it’s not as good a product overall as a double-glazed system that already achieves that standard.

Again, quality is crucial in enabling the spec you want; in general, the better engineered sliding patio door systems can achieve much larger sizes when triple-glazed. “If you’re looking at a product that can only go 1.5m-wide, then it’s probably not the most robust option,” says Matt. “But if it can go up to 4m wide in one panel, you can be confident it’s strong and has a high weight-bearing capacity.” Note that some systems are only available triple glazed.

How Much Should You Budget for Different Sliding Door Glass Types?

The spec for your sliding patio doors goes beyond simply double or triple panes. “For security, on new build homes, the Building Regs require laminated glass on at least one pane for any door or window that’s deemed to be accessible,” says Matt. That will mean anything on the ground floor, plus units on the first floor that could be reached via a flat roof or suchlike.

The rules are more relaxed for extensions and home renovations, though you’ll at least need to install toughened glass. As a benchmark, for Kloeber’s doors, laminated glass costs around £20 per m² more than toughened. Given the relatively small price difference, some people do go for laminated even where it’s not a requirement.

A newer Building Regulation – Part O for overheating – may have a bigger impact on how much your sliding doors cost. It currently only applies to new houses, but the principles are worth considering on renovation and extension projects, too. “If your designer comes up with a big glass box and there’s no overhanging roof or other forms of solar shading, we might need to specify solar control glass to reduce the g-value and avoid overheating,” says Craig. “Solar glass would typically add about 6% to the total door cost.”

Learn More: Solar Shading: What Are the Benefits and How Can You Get it Right?

Kloeber's double-glazed, PAS 24-compliant Kustomslide Plus doors (no trickle vents) were chosen for this new build project
A similar system would cost around £16,715 + VAT

Which Colour Options Are Available for Sliding Patio Doors? 

These days, most sliding door suppliers offer a wide range of RAL colours as standard. “If you want a different one, it’s not likely to affect the price much,” says Craig. RAL is a colour-matching system that enables quality assurance over the hue of powder coatings and timber finishes for doors, windows and various other products. PVCu products are generally more limited in colour choice.

If you want something more unusual, or to switch to a dual colour system (one hue outside, another inside) this may add some cost – but it depends on the supplier and the product. For instance, with an alu-clad timber sliding door, you’ve already got two construction materials, so you’d need two different finishes anyway.

“On aluminium sliding doors where you need two profiles coated separately, and then rolled together with a thermal break in the middle, there would be an extra cost for going dual-colour,” says Matt. Again, it’s system-specific, but as a ballpark, you might budget around £600 per door panel to have different finishes inside and out on an aluminium slider.

How Much Do Sliding Patio Doors Cost in 2024? What to Budget for Sliding Door Options & Installation

Ecohaus’s Visiline ultra-slim doors were chosen for this striking home on a sloping plot, helping to maximise light and views to the garden

How Much Should You Budget for Ironmongery & Locking Systems?

With most sliding doors, you can expect a single handle option, albeit with a choice of colours (such as the ability to match the frame). Certain models don’t have any handles at all: with Kloeber’s Uberslide doors, the locking system is secreted within the frame and electronically controlled, so there’s no need for traditional ironmongery.

Where you might have more choice is on whether to include locks and handles on both sides, or just internally. For example, Kloeber’s lift-and-slide doors can be specified with just a cup handle externally, with the lock and lever handle only accessible from within the house, increasing security. If you want to retain the ability to unlock and operate the door from your garden, you can – it will just cost a bit more. “On these sliding doors, it would cost an extra £110 + VAT to have a handle and key cylinder on the outside, as opposed to inside-only,” says Matt.

Security is an important factor for any door, and shouldn’t be overlooked when specifying sliding patio doors. On new builds, you’ll need a product that’s passed PAS 24 testing and complies with Part Q of the Building Regulations – which generally means a certified multi-point locking system and laminated glass.

While the same standard isn’t mandatory for house extensions or home renovations, it’s a sensible specification. Most sliding doors will have just one locking option, designed to suit that particular slider and make it as secure as possible.

More Ideas: 31 Amazing Window Design & Feature Glazing Ideas

Do Sliding Doors Need Trickle Vents?

Part F of the Building Regulations requires a sufficient rate of background ventilation to be achieved when installing new windows and doors, to preserve good air quality. If you’re building a new bespoke home to good standards of airtightness, then you’ll probably be installing a mechanical ventilation (MV) system to deal with the supply of fresh air. But MV is rare in renovation and extension projects – unless you’re undertaking a major eco home retrofit.

So, in most existing homes, the only way to meet Part F of the Regs is by adding trickle vents to provide that fresh supply of air. Incorporating these vents does cost more – expect to pay anything between £200 and £600 per panel – as the frame will need adjustment. What’s more, not all systems can accommodate them. “We’re hearing of more and more projects that fail building control inspection, because the system that’s been installed isn’t capable of incorporating a trickle vent,” says David.

It’s important, therefore, to understand whether the product you’re buying suits the project at hand. Working with a quality supplier will help you to get this right. “Our super slimline sliders don’t have room for trickle ventilation,” explains Matt. “But this is a premium system, aimed at high-end new builds, which are likely to have mechanical ventilation with heat recovery (MVHR). For replacements, we’d suggest a more cost-effective product that’s not as slim but does have room for the vents.”

Many homeowners are put off by the aesthetics of trickle vents. “They don’t look great, and the last thing you want is to put a hole through a high-performance window,” says Craig. “Controlled mechanical ventilation is the best way of doing it and won’t spoil the look or efficiency of your doors. But if the project needs trickle vents, we’ll do them.”

Do Sliding Doors Require Structural Reinforcements?

Any structural opening that’s holding up weight (walls, roof etc) will need some kind of lintel above to support those loads. That generally means fitting a steel I-beam – also commonly known as an RSJ (rolled steel joist) – across the top of the opening. A sliding patio door system isn’t designed to do this job, though it will be specified to accommodate any anticipated deflection over the steel’s lifetime.

The wider the span of the aperture, the chunkier that beam will be and the more it will cost. If you’re building a new home or extension, this will be part of the structural engineer’s work and priced into the whole project. You’ll need to do the same if you’re fitting new doors into an existing wall – so be sure this is factored into your costs.

How Much Do Sliding Patio Doors Cost in 2024? What to Budget for Sliding Door Options & Installation

A large, three-panel set of IDSystems theEDGE2.0 sliders installed in an extension to a period home in Herefordshire. The 7,495mm (W) x 2,409mm (H) system features panels approx 2,498mm wide, fitted with solar control, security laminate glazing and PAS 24approved locks. Two of the panels slide, sitting behind a fixed frame when fully opened. An equivalent installation would start from around £14,800 + VAT (including fitting). Photo: AR Design Studio / Paul Carter Photography

Open corners, with beautiful glass-to-glass sliding doors, are a popular trend for new homes and extensions. But the structural implications here are even more significant. “The minute you take out that corner section, you need even more structure, such as an upright steel post inside the building or cantilevered steelwork,” says Craig.

Many homeowners aspire to a level threshold between indoors and out. Bear in mind this will have an impact on the price of your system and how it’s installed. “The door itself would be basically the same, but we might need to specify different types of cill, drainage or add-ons to the frame to suit the threshold and paving type,” says Matt. These elements can’t be accurately priced until the design details are finalised.

More Ideas: Corner Bifold Doors: How Do Corner Bifolds Work & Are They Right for You?

How Much Does it Cost to Install Sliding Patio Doors?

Many sliding patio door specialists operate on a supply-and-install basis, which gives you the added confidence that a single company is responsible for measuring, manufacturing and installing the system. You can, of course, ask your builder to do the job – but just be sure they have the appropriate credentials and that any warranties will still be valid.

For a standard two-panel, 4m-wide sliding door system that doesn’t require mechanical lifting equipment, your sliding patio doors should take around a day to install, at a cost of around £800-£1,000 (where you are in the country may affect prices). This is a more detailed job than fitting a straightforward window; with sliders, everything needs to be perfectly level and properly integrated to ensure the panels continue to perform as expected in the long term.

Installation costs will go up if you’re dealing with large or heavy door panels, which may require lifting machinery. In some cases, this can tip the balance away from supersized panels towards fewer, smaller doors. “For large installs, we partner with a specialist company that provides a risk assessment, a lifting plan, and lifts those particular panels for us,” says Matt. “Handling big weights manually is dangerous for the worker and could be expensive if the unit’s dropped. If there’s a cheap installation cost and an extremely heavy door, that’s something I’d be worried about.”

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