Your old front door’s finally giving up, and before you start picking colours or styles, there’s one number you really want to pin down first. And fair enough, composite doors aren’t cheap, so it makes sense to get a clear picture before you start collecting quotes.
So, how much does a composite door cost? When it comes to the cost of a new door, in the UK, a new composite door will cost you £1800 to £3500 when fully fitted, and £900 to £2200 for just a door delivery. If you’re in Glasgow and weighing up your options, it’s worth getting a quote from a local specialist like Trade UPVC Windows Glasgow, who supply and fit composite doors across the central belt of Scotland.
Prices vary depending on the brand, hardware, glazing, and whether you opt for standard GRP or high-end solid timber cores. In this guide, we’ll be breaking down all of that, and you’ll know what you are paying for and what you can do to avoid overspending.
How Much Does a Composite Door Cost on Average?
Generally, a composite door is fully fitted at an average price of £1,100 to £2,500, depending on the specification, with prices exceeding £4,000 available for premium options.
So if you’re trying to work out how much a composite door will cost for your specific setup, the table below breaks down the most common configurations.
A basic GRP composite door in white with no glass starts from around £1,100 fitted, while a solid timber-core door from a brand like Solidor or Endurance, with decorative glass and a colour upgrade, usually lands between £1,800 and £2,200. At the very top end, a 70mm or even 120mm door with triple glazing and premium hardware can go beyond £4,000.
Here’s a quick summary of the cost of some of the most popular setups, fitted, including VAT:
| Configuration | GRP (basic brands) | Solid timber core (Rockdoor, Solidor, Endurance) |
| Single door, white, no glass | From £1,100 | From £1,200–£1,500 |
| Single door with colour, glass and bar handle | £1,500–£1,800 | £1,700–£2,200 |
| Door with one sidelight | £1,500–£2,000 | £1,600–£2,500 |
| Door with two sidelights | £1,800–£2,400 | £2,000–£3,000 |
| Stable door | £1,800–£2,500 | £2,200–£3,500 |
| French doors | £1,800–£2,500 | £2,200–£3,500 |
These are mid-range prices, so if you have a lower price, you’ll have a pretty standard white door with normal glass; if you have a higher price, you’ll have higher-quality glass and colour and have upgraded hardware. The real final value will depend on what specific you select.
What’s Included in a Fully Fitted Composite Door Price?
To make comparisons between companies, it’s good to understand what should be included in that price. Otherwise, you could end up comparing two quotes that aren’t really for the same thing.
This should include the door slab, the outer frame, all the hardware (hinges, etc., lock, cylinder, handles), the threshold, weather seals, the actual installation and the removal of your old door, plus VAT.
There is a problem, however, some companies omit either the cill, the low threshold, the letterbox or even the frame from their headline price just to make the number look smaller. Others bundle everything in from the start. So always ask for a total fitted price with nothing hidden, and if a company won’t give you a straight answer, that tells you something on its own.
What Affects the Price of a Composite Door?
A composite door isn’t a one-size-fits-all purchase, and a lot of small choices add up to make a big difference in the final cost. Here’s what tends to move the price up or down.
Door Material and Core Type
The core of the door makes a real difference to both price and performance. Most composite doors use either a foam-filled polyurethane core (GRP) or a solid timber core.
GRP doors, from brands like Door-Stop, Hallmark, and Virtuoso, are lighter, more affordable, and still offer decent thermal performance; they’re a solid choice if you want good value without overspending. The main trade-off is that most GRP doors use clip-in glazing cassettes, which can technically be removed from outside (though this isn’t a common break-in method in practice).
Solid timber-core doors, like Solidor and Endurance, use a 48mm timber core that gives the door a heavier, more substantial feel. Rockdoor takes a slightly different approach with a high-density foam core wrapped in a 360° aluminium-reinforced frame, along with S-Glaze technology that seals the glass permanently into the door during manufacture, so there’s no removable cassette at all.
Generally speaking, UPVC and foam-core composite doors sit at the cheaper end, while solid timber and reinforced-frame doors cost more but bring extra strength and security.
Local installers such as Trade UPVC Windows Glasgow also offer a range of composite door styles alongside their core uPVC window and door services, so it’s worth comparing both options when you’re collecting quotes.
Door Size
A bigger door means more material and more labour, both of which push the price up. Most composite doors come in standard widths of 700 mm or 850 mm, with heights around 1700 mm to 2275 mm, and a thickness of 44 mm to 48 mm. If you’re working to a budget, sticking with a standard size rather than something oversized or custom will help keep costs down.
Door Style and Design
Simpler styles, think traditional or contemporary designs with solid panels, tend to be the most affordable. French-style doors, with their symmetrical glass panels that open from the centre, cost more because of the extra glazing and the more delicate construction. Arched-style doors, with curved tops in styles like Gothic or Tudor arches, also add to the price because of the extra detailing involved.
Fire doors are another step up again. These come with a fire-resistance rating (usually 30–60 minutes), and while they’re very durable, they’re also expensive and harder to customise.
Colour and Finish
White is almost always the cheapest option, since it’s the standard finish most brands build their base price around. Choosing a colour for the outside of the door, anthracite grey, black, green, whatever you fancy, typically adds around £50 to £70 depending on the brand.
If you want the frame to match the door colour too, that’s an extra cost on top. And if you want different colours inside and outside (known as dual colour), expect to pay more again. Solidor stands out here with over 27 colour options available on both sides, which is more than most other brands offer.
One thing worth knowing: anthracite grey is currently the most popular colour in the UK, followed by black and agate grey. But darker colours absorb more heat, which can cause more thermal movement on doors that face south. If your door gets a lot of direct sun, a lighter shade like agate grey or cream might be worth considering.
Glazing Options
Glazing has a big effect on both the look and the cost of your door. Plain or single glazing is the cheapest option, while double and triple glazing offer better insulation and noise reduction — at a higher price.
Glass upgrades typically range from £60 to £300. At the lower end, you’re looking at things like satin or frosted glass and simple leaded designs. At the higher end, exclusive 3D glass designs, bevelled glass, and decorative fusions push the price up. Rockdoor’s 3D glass range, for example, starts from around £250 and isn’t available from any other manufacturer.
For extra security, laminated glass is available on most brands and is significantly harder to break through than standard toughened glass.
Locking Mechanism and Security
Standard locks like padlocks, cylinder locks, and basic deadlocks are the more affordable options. But if security is a priority, multi-point locks, smart locks, and mortice locks cost more, and many homeowners feel the extra peace of mind is worth it.
Most composite doors now come with a 3-star anti-snap cylinder as standard (Ultion, Avocet ATK, or ABS depending on the brand), which is a good baseline for security. If you’re after the best protection, Rockdoor’s Avocet ATK cylinder is one of the highest-rated on the market.
Hardware and Accessories
This is where small choices can really add up:
- Bar handles range from £80 to £160, depending on the length and finish. Standard lever handles are usually included as standard, so a bar handle is always an upgrade.
- Letterplates add around £50 for a standard option, while contemporary or architectural designs can cost £80–£130.
- Knockers typically cost £20–£40, though contemporary bullring styles can go up to £90–£120.
- Spyholes are usually around £15 and need to be fitted at the factory.
- Cat flaps typically cost around £90 and should ideally be ordered when the door is manufactured, though it may be possible to add one later; just check first, as retrofitting could invalidate the warranty.
Other features, such as alarm systems and electronic detection, may also be included, which will bring up the cost depending on the features used.
Sidelights and Toplights
Sidelights, the glazed panels fitted alongside the main door, add a lot of natural light but also a fair bit of cost. Expect to pay £240–£400 per sidelight panel, so a door with one sidelight typically adds £240–£400 to your total, and a door with sidelights on both sides could add £480–£800.
The panel above the door (also called toplights) are slightly less expensive (typically £210-£370 depending on size and glass design).
Keep in mind that adding sidelights can also affect your cill cost (since a wider opening needs a longer cill), and if your existing opening isn’t wide enough, you might need structural work to widen it.
Installation Complexity
If your installer runs into unexpected issues, like needing to adjust the frame or widen the opening, that adds to the labour cost. Older properties are more complicated than newer ones, primarily because old timber is difficult to remove, reveals are not as level as new after many years of settling, and plaster can be easily broken.
New builds, on the other hand, are usually straightforward: clean plasterboard, level reveals, and no old frame to deal with. This is why the same door can cost more to fit in a Victorian terrace than in a 2015 new build.
A Worked Example: How Extras Add Up
The price of a composite door can escalate easily when extras are added on. Here’s a true example of a base door which turns into a £2,030 door:
| Item | Cost |
| Base door (white, lever handle, standard threshold) | £1,500 |
| Anthracite grey colour upgrade | £50 |
| Decorative glass design | £275 |
| Stainless steel bar handle | £120 |
| Standard letterplate | £50 |
| White cill | £15 |
| Low aluminium threshold | £20 |
| Total (fully fitted, inc. VAT) | £2,030 |
Add a spyhole, a knocker, and upgrade to a larger bar handle, and you’re past £2,100. Add a sidelight, and you’re approaching £2,500. That is why the “from” prices you can see in the ads do not necessarily correspond to the price you will pay. Never compare quotes without a full specification and total price!
Supply-Only vs Fully Fitted
If you’re comfortable with self-installation or have a trusted installer, the difference in buying a composite door on a supply-only basis can be a pretty good 40 – 50 % less than a fully fitted price, as you will save on the labour, survey and waste disposal.
A few things to keep in mind if you’re going down this route:
- Warranty: Many manufacturers’ warranties only cover if it is an approved installer who fits the door. You may lose that cover if you install it yourself or hire an unregistered person to install it.
- Building Regulations: replacing an external door means complying with Part L for thermal performance. A registered installer (FENSA, Certass, or similar) can self-certify this for you. If you DIY it, you’ll need to arrange a building control inspection yourself, which adds cost and hassle.
- Getting it wrong: composite doors need precise measurements and proper fitting to perform well. A door that doesn’t fit properly may have weathersealing problems, locking problems, accelerated wear, and the cost to remedy these problems is more expensive than saving these issues in the beginning.
Why Composite Doors Cost More Than uPVC
If you’re wondering why composite doors come with a higher price tag than uPVC, it comes down to construction. Unlike doors made from one material, composite doors are made up of several materials, all of which work together to provide increased strength, insulation and longevity.
They’re also built to tighter tolerances, with a wider choice of designs, colours, and finishes, which adds to manufacturing costs compared to standard uPVC.
Let’s do a quick comparison to get a sense of things:
| Composite Doors | uPVC Doors | |
| Security | ⭐⭐⭐⭐ | ⭐⭐⭐ |
| Cost | £££ | £ |
| Maintenance | Low | Low |
| Lifespan | 30–35 years | 25–30 years |
uPVC doors typically cost £500–£900 fully fitted, and while they’ll do the job, they fall short on security, thermal performance, and kerb appeal compared to a composite door. Timber doors, on the other hand, range from £1,500 to £4,000+, but need regular maintenance, sanding, priming, and repainting every couple of years, and are more prone to warping. For the majority of homeowners, composite is in the ‘Goldilocks’ zone between uPVC and timber in terms of performance and maintenance.
What Should Your Composite Door Quote Include?
When you’re comparing quotes, make sure you’re comparing the same thing. A genuine quote should include:
- A technical survey
- Full product details (brand, model, and specification)
- Any extras and door furniture
- Door handles
- The locking system and its security rating
- The energy rating for any glass
- A fitting date
- Guarantees for both the product and the installation
- Company details and accreditations
- Disposal of your old door (this one’s often forgotten)
If any of them is missing, think about it and ask “why?” before you commit.
Standards to Look Out For
When purchasing a door that is new, it’s advisable to make sure it complies with recognised security and quality standards.
For door locks:
- BS 3621 or EN 13309 for five-lever mortice locks
- TS 007 3-star or SS 312 diamond for an anti-snap euro lock
For the door itself:
- BSI PAS 24 standards
- Secured by Design certification
For the installer:
- Competent Person Scheme (CERTASS)
- Fenestration Self-Assessment Scheme (FENSA)
The reason they are so important is that they prove that the installer is compliant with the building regulations and can also impact your warranty in the future.
How Long Does a Composite Door Last, and Is It Worth the Cost?
A good-quality composite door should last 30 years or more with minimal upkeep. It won’t warp or rot easily, as timber will, and will not bow or fade over time as uPVC will.
When you spread that cost over three decades, it starts to look pretty reasonable. A £3000 door over 30 years is approximately £100 per year – which is quite reasonable for improved insulation, security and kerb appeal.
On top of that, high-quality composite doors can achieve U-values as low as 0.7 W/m²K, which helps cut down on draughts and heat loss. A new door alone will not dramatically reduce your heating costs, but it can definitely enhance heating performance and comfort in the hallway area.
So, are composite doors worth it? For most homeowners planning to stay in their property long-term, the combination of security, durability, and low maintenance makes it a solid investment rather than just an expense.
Real-World Examples From UK Homeowners
The easiest way to get an idea of the price is to check the prices paid by others. These are real costs which homeowners share in the UK:
- A single window was fitted on a composite door, which was around £1,400 in the North West.
- An Endurance door with side windows and top light cost £2,000 in 2021.
- A Solidor with top and side lights, including fitting and removal of the old door, came to £1,700 inc VAT.
- A Rockdoor Newark model, fully installed, cost £2,050.
- A composite door with a large top window cost £2,100, fitted at the end of last year.
- A door with two side panels (450mm each), supply-only, came to £1,350.
- The local company installed the composite front door for this homeowner for £950 (including fitting).
- A homeowner in Glasgow had a composite door supplied and fitted by Trade UPVC Windows Glasgow, who specialise in A-rated double glazing and multi-point locking systems across the city.
As you can see, there are a few factors involved – location, brand, and specification – and it’s usually a good idea to shop around with smaller local installers, as you can find better deals than with larger, national companies.
How to Get the Best Price on a Composite Door
A few practical tips that can genuinely save you hundreds of pounds:
- Get at least three quotes. The prices may differ by 30 to 40% between the different companies in the same brand and spec, and so it’s worth the extra time.
- Compare like-for-like. Make sure every quote covers the same brand, style, colour, hardware, and glass. A £1,200 quote for a basic GRP door isn’t comparable to an £1,800 quote for a premium timber-core door; they’re different products entirely.
- Ask what’s included. Does the price cover the outer frame, cill, threshold, letterplate, removal of the old door, and VAT? If something’s missing, the “total” isn’t really the total.
- Check the installer’s credentials. Are they on FENSA, Certass or other similar schemes? Are they an insurance-backed guarantee? These are significantly more than they appear on the surface.
- Stick to standard colours where you can. Anthracite grey, black, white, green, and cream are usually the most affordable and available from every manufacturer.
- Think carefully about hardware. A bar handle adds £80–£160 over a standard lever handle, and a fancy letterplate can add £80–£130. For those who can’t afford fancy materials and expensive hardware, a standard one with a good door is an excellent choice.
- Consider a solid panel design. Doors without glass are cheaper than glazed ones, and a solid panel in a good colour with a nice handle can look just as striking, while being more secure too.
- Don’t wait for a sale. Genuine manufacturer promotions are rare. If it seems like a great deal, it probably is, and there will be deals that are high pressure that end in the shop being an inflated price knocked down to where it should be. It’s usually too good to be true.
If you’re based in Glasgow, local family-run companies like Trade UPVC Windows Glasgow often work out cheaper than national chains, while still offering 10-year product warranties and FENSA-style accreditation.
A Note on Finance
If you’re considering financing a composite door, it’s worth being cautious. Some larger companies offer 0% finance over 12 months or longer payment plans, but these can sometimes hide just how much you’re really paying. While a monthly number may seem reasonable, over several years, particularly with higher APRs, the numbers can add up to 2-3 times the cost of the door.
Always ask for the cash price first, and compare that against quotes from other installers. If the cash price seems much higher than the financed monthly total suggests, the finance deal is likely just spreading a higher overall cost over a longer period.
And if you’re in Glasgow or the surrounding central belt, Trade UPVC Windows Glasgow is a solid local option for both supply and full installation of composite doors
Final Thoughts
So, how much does a composite door cost? As we’ve covered, most homeowners in the UK pay somewhere between £1,100 and £2,500 fully fitted, with premium options going beyond that depending on the brand, size, glazing, and extras you choose. Options without any supply may save you 40-50%, but have their own set of compromises with regard to warranty and building codes.
The best approach is to get a handful of quotes, compare them properly using the checklist above, and make sure you understand exactly what’s included before signing anything. Whatever spec you choose, a composite door is a long-term investment, so invest wisely, and your home will thank you for it for many years.
FAQs
How much does a composite door cost in the UK?
Most composite doors cost between £1,100 and £2,500 fully fitted, depending on the brand, size, and specification. The prices for premium options (triple glazing, solid timber cores) can exceed £4,000.
Which is cheaper, composite or uPVC doors?
uPVC doors are generally cheaper, typically costing £500–£900 fully fitted compared to £1,100+ for composite. However, composite doors offer better security, insulation, and durability.
Why are composite doors so expensive?
The multi-layer laminated construction of composite doors, with a steel or aluminium reinforcement, a durable outer layer and a reinforced core, makes them more expensive. They are also fitted with high-quality locking systems and provide superior thermal characteristics.
Is it cheaper to buy a composite door supply-only?
Yes, supply-only prices are typically 40–50% lower than fully fitted prices, since you’re not paying for labour, survey, or disposal. Just be aware that this can affect your warranty and Building Regulations compliance.
Do sidelights and toplights add much to the cost?
Yes, sidelights usually cost £240 – £400 per panel, while toplights will be £210 – £370 each depending on the brand and design of the glass.
How long does a composite door last?
For most homeowners, that is a worthwhile investment in a good quality composite door in that it will last for 30 years or more with little maintenance.
