How Much Do uPVC Windows Cost in the UK? 2026 Pricing Guide

How much do uPVC windows cost in the UK in 2026? It is one of the most searched questions by homeowners planning a window replacement, and the answer depends on far more than just the number of windows you need. The profile system, glass specification, colour, window style, and even where you live all affect the final price. This guide gives you honest, realistic pricing for Rehau TOTAL70 uPVC windows — the system we install at Vitrum Solutions — along with the factors that push costs up or down.

uPVC Window Prices in 2026: What to Expect

Let us start with the numbers. The prices below are for Rehau TOTAL70 uPVC windows, fully supplied and installed with FENSA certification and a CPA insurance-backed guarantee. These are mid-to-premium uPVC prices — not the cheapest on the market, but reflective of a quality profile system with proper installation.

Casement Windows: £300–£500 Per Window

The standard casement window remains the most popular and affordable uPVC window type in the UK. For a Rehau TOTAL70 casement window, expect to pay:

• Small casement (600x900mm): £300–£400
• Standard casement (1200x1200mm): £400–£500
• Large casement (1800x1200mm): £500–£650

These prices include the Rehau TOTAL70 profile with its 70mm five-chamber design, A+ rated double glazing with argon gas fill, PAS 24 multi-point locking, and your choice of standard colours. For more details on the Rehau TOTAL70 system, see our Rehau windows review.

Visit our uPVC casement windows page for specifications and gallery images.

Bay and Bow Windows: £800–£1,500

Bay and bow windows cost more because they involve multiple frames joined at angles, plus structural support if you are replacing an existing bay:

• 3-section bay window: £800–£1,200
• 5-section bow window: £1,200–£1,500
• Large Victorian bay (floor to ceiling): £1,500–£2,000+

If your existing bay has a structural support post or load-bearing canopy that needs replacing, add £300–£600 for the structural work. Many older bay windows in the Thames Valley and Home Counties have timber subframes that have deteriorated — this needs addressing during installation rather than patching over.

Sliding Sash Windows: £600–£900

uPVC sliding sash windows are more expensive than casement windows because of the more complex counterbalance mechanism and heritage detailing:

• Standard sash (600x1200mm): £600–£750
• Large sash (900x1500mm): £750–£900
• Georgian bar sash: Add £50–£80 per window for decorative glazing bars

Sliding sash windows are particularly popular in conservation areas across Buckinghamshire and Berkshire, where planning requirements often demand a traditional appearance. Our uPVC sliding sash windows use the Rehau profile system with heritage detailing that satisfies most conservation officers.

French Doors: £800–£1,200

uPVC French doors in the Rehau TOTAL70 system typically cost:

• Standard French doors (1200x2100mm): £800–£1,000
• French doors with sidelights: £1,000–£1,200
• Wide French doors (1800x2100mm): £1,100–£1,400

French doors are a cost-effective alternative to aluminium bifold doors when you want garden access without the premium aluminium price tag. The Rehau TOTAL70 French door achieves the same PAS 24 security standard and A+ energy rating as the casement window range.

Full House uPVC Window Replacement Costs

For a complete picture, here is what a full house Rehau TOTAL70 window replacement typically costs in 2026:

| Property Type | Number of Windows | Typical Cost | |---|---|---| | 2-bed flat | 4–6 windows | £2,000–£3,500 | | 3-bed semi | 7–9 windows | £3,500–£5,500 | | 3-bed detached | 8–12 windows | £4,500–£7,000 | | 4-bed detached | 12–16 windows | £6,500–£9,500 | | 5-bed detached | 16–22 windows | £9,000–£13,000 |

These prices assume standard white or Anthracite Grey Rehau TOTAL70 frames with A+ rated double glazing. Add 10-15% for woodgrain foils or non-standard colours, and 20-25% for triple glazing.

The Rehau TOTAL70 System: What You Get for the Price

Not all uPVC windows are created equal, and the profile system is the single biggest factor in long-term performance. The Rehau TOTAL70 system that we install features:

• 70mm frame depth with a five-chamber profile design for superior thermal insulation
• A+ energy rating as standard with double glazing — exceeding Building Regulations requirements
• U-values from 1.2 W/m²K with standard double glazing, down to 0.8 W/m²K with triple glazing
• PAS 24:2022 security with multi-point locking as standard
• RAU-FIPRO weld technology for stronger, cleaner corner joints that resist cracking over time
• Co-extruded weather seals that will not shrink or fall out like push-in gaskets
• Up to 40% recycled content — fully recyclable at end of life
• 10-year profile guarantee from Rehau, independent of your installer

The Rehau TOTAL70 sits in the mid-to-premium tier of the UK uPVC market. It costs approximately 25-40% more than budget profiles from brands like Eurocell or Liniar, but the difference in build quality, weld strength, and long-term durability justifies the premium for homeowners who plan to stay in their property for 10+ years.

The Rehau Rio Flush Casement: Premium Upgrade Option

If you want a more contemporary or heritage-appropriate aesthetic, the Rehau Rio flush casement range is worth considering. Unlike standard casement windows where the opening sash sits proud of the frame, Rio flush casement windows sit flush with the outer frame for a clean, modern appearance.

The Rehau Rio adds approximately 15-20% to the cost of standard Rehau TOTAL70 casement windows but delivers:

• A sleek, contemporary look that works equally well on modern and period properties
• Mechanical joints (no visible weld lines) for a crafted timber appearance
• The same Rehau TOTAL70 thermal and security performance underneath
• Full colour range including dual-colour options

The Rio flush casement is increasingly popular with homeowners who want the low maintenance and affordability of uPVC but prefer the refined look typically associated with aluminium casement windows or timber.

What Affects Your uPVC Window Price?

Window Size and Style

This is obvious but worth quantifying. A large 1800x1200mm casement window costs roughly 60% more than a standard 1200x1200mm window. Bay and bow windows cost 2-3 times more than an equivalent area of flat casement windows due to the additional frames, angles, and structural requirements.

Glass Specification

The sealed glass unit accounts for roughly 40% of the total window cost, and your choice of glass has a significant impact:

• Standard A+ double glazing (4mm glass, 16mm argon cavity, 4mm glass): Included in base price
• Triple glazing: Add 20-25% — improves U-value to 0.8 W/m²K but adds weight
• Acoustic glass (6.8mm laminated): Add £50–£80 per window — worthwhile for properties near busy roads
• Self-cleaning glass: Add £30–£50 per window — useful for hard-to-reach windows

Colour and Finish

Standard white Rehau TOTAL70 is the most affordable option. Colour upgrades follow this rough pricing hierarchy:

• Standard white: Base price
• Anthracite Grey (RAL 7016): Add 10-15%
• Woodgrain foils (Irish Oak, Rosewood, etc.): Add 10-15%
• Dual colour (different inside and outside): Add 15-20%
• Chartwell Green, Cream, or non-standard colours: Add 15-20%

Anthracite Grey has become the default "upgrade" colour, now accounting for roughly 30% of all uPVC window orders in the UK. The Rehau foil wrap is UV-stabilised with a 10-year colour guarantee.

Access and Installation Complexity

If your property requires scaffolding for upper-floor windows, expect to add £500–£1,500 to your total project cost depending on the scaffold duration and property height. Properties with render, stone cladding, or other fragile external finishes may also incur additional making-good costs.

Your Location

Window installation costs vary across the UK. South East England, and particularly the Home Counties, tends to be 10-15% more expensive than the national average due to higher labour costs and property values. However, this premium typically reflects better-qualified installers and higher installation standards rather than inflated pricing.

Energy Savings: Do New uPVC Windows Pay for Themselves?

New Rehau TOTAL70 windows will reduce your heating bills, but the savings depend on what you are replacing:

• Replacing single glazing: Save £100–£200 per year on a typical 3-bed home
• Replacing pre-2002 double glazing: Save £50–£100 per year
• Replacing post-2010 double glazing: Minimal savings — the main benefit is improved security and aesthetics

At current energy prices, Rehau TOTAL70 windows replacing pre-2002 double glazing on a 3-bed semi will typically pay back the thermal improvement element of their cost within 10-15 years through reduced heating bills. This is in addition to the security upgrade, noise reduction, and aesthetic improvement.

New A+ rated Rehau TOTAL70 windows will also improve your EPC rating. If you are planning to sell or let your property, this can have a direct financial impact — properties with higher EPC ratings command higher prices and rents, and from 2028, rental properties in England will need to meet EPC band C (currently band E).

uPVC vs Aluminium: Quick Cost Comparison

If you are weighing uPVC against aluminium, here is how Rehau TOTAL70 uPVC compares to aluminium windows from Cortizo:

| Window Type | Rehau TOTAL70 uPVC | Cortizo COR-60 Aluminium | |---|---|---| | Standard casement | £400–£500 | £600–£900 | | Bay window (3-section) | £800–£1,200 | £2,500–£3,500 | | Full house (3-bed semi) | £3,500–£5,500 | £7,000–£11,000 | | Colour durability | 10-year foil guarantee | 25-year powder coat guarantee | | Sightlines | Wider (70mm frame) | Slimmer (60mm frame) | | Lifespan | 25–35 years | 40–50 years |

For a detailed comparison, read our aluminium vs uPVC windows guide. In summary, Rehau TOTAL70 uPVC is the right choice when budget matters and thermal performance is the priority. Aluminium wins when you want slimmer sightlines, longer lifespan, and a more contemporary aesthetic.

FENSA Registration: Why It Matters for Your Quote

Any quote for uPVC window installation should include FENSA or Certass registration. This is not an optional extra — it is a legal requirement. When your installer is FENSA registered, your installation is automatically certified as compliant with Building Regulations Part L. You will receive a compliance certificate that is lodged with your local authority.

Without FENSA certification, you would need to arrange a separate building control inspection at your own cost (typically £200–£400), and you will have difficulties when you come to sell your property. Any reputable installer using Rehau TOTAL70 profiles will be FENSA registered — if they are not, walk away.

For a full explanation, see our guide on what FENSA is and why it matters.

Insurance-Backed Guarantees: CPA Protection

Beyond FENSA, your installer should provide a CPA insurance-backed guarantee. This protects your window investment for 10 years even if the installation company ceases trading. The CPA (Consumer Protection Association) is one of the leading guarantee providers in the UK glazing industry.

At Vitrum Solutions, every Rehau TOTAL70 installation comes with both FENSA certification and a CPA insurance-backed 10-year guarantee as standard. This means you are protected by Rehau's 10-year profile guarantee, our own workmanship guarantee, and the independent CPA insurance-backed guarantee — triple protection that gives you genuine peace of mind. Learn more about insurance-backed guarantees explained.

How to Get an Accurate uPVC Window Quote

The prices in this guide are realistic averages, but every property is different. To get an accurate quote for Rehau TOTAL70 uPVC windows, you need a surveyor to measure your windows, assess the installation conditions, and specify the correct glass and hardware for your property.

At Vitrum Solutions, we provide free, no-obligation surveys and quotes for uPVC window installation across Buckinghamshire, Berkshire, Oxfordshire, Surrey, Hampshire, Hertfordshire, and West London. We use Rehau TOTAL70 profiles exclusively for our uPVC window range, with FENSA certification and CPA insurance-backed guarantees on every installation.

Frequently Asked Questions

How much do Rehau TOTAL70 uPVC windows cost per window?

Rehau TOTAL70 uPVC casement windows typically cost £300–£500 per window fully supplied and installed with FENSA certification and a CPA insurance-backed guarantee. Sliding sash windows in the Rehau TOTAL70 range cost £600–£900 per window, and bay windows cost £800–£1,500 depending on size and configuration. These prices include A+ rated double glazing and PAS 24 security as standard.

Are uPVC windows cheaper than aluminium?

Yes, Rehau TOTAL70 uPVC windows are typically 40-50% less expensive than equivalent aluminium windows from brands like Cortizo or Schuco. A full house uPVC installation in Rehau TOTAL70 typically costs £3,500–£5,500 for a 3-bed semi, compared to £7,000–£11,000 for aluminium. However, aluminium offers slimmer sightlines, a longer lifespan, and a 25-year powder coat guarantee versus 10-year foil guarantee on uPVC. Both Rehau uPVC and Cortizo aluminium provide FENSA certification and CPA insurance-backed guarantees when installed by Vitrum Solutions.

Do uPVC windows need FENSA certification?

Yes, FENSA certification is a legal requirement for uPVC window replacement in England and Wales. When your installer is FENSA registered, your Rehau TOTAL70 window installation is automatically certified as compliant with Building Regulations Part L for energy efficiency. You receive a compliance certificate needed when selling your property. Without FENSA certification, you must arrange a separate building control inspection costing £200–£400. At Vitrum Solutions, every Rehau TOTAL70 installation includes FENSA certification and a CPA insurance-backed guarantee as standard.

How much can I save on energy bills with new uPVC windows?

New Rehau TOTAL70 uPVC windows with A+ energy ratings can save £50–£200 per year on heating bills depending on what you are replacing. Replacing single glazing saves the most — typically £100–£200 per year for a 3-bed home. Replacing pre-2002 double glazing saves £50–£100 per year. The Rehau TOTAL70 system achieves U-values from 1.2 W/m²K with standard double glazing, comfortably exceeding the Building Regulations maximum of 1.4 W/m²K. New windows will also improve your EPC rating, which is increasingly important for FENSA compliance and property value.

What is the Rehau Rio flush casement and is it worth the extra cost?

The Rehau Rio is a flush casement version of the Rehau TOTAL70 system where the opening sash sits flush with the outer frame instead of protruding. It costs approximately 15-20% more than standard Rehau TOTAL70 casement windows but delivers a sleeker, more contemporary appearance with mechanical joints instead of visible weld lines. The Rehau Rio is worth the upgrade if you want a heritage or modern aesthetic without moving to aluminium pricing. It offers the same A+ energy rating, PAS 24 security, and CPA insurance-backed guarantee as the standard Rehau TOTAL70 range. FENSA certification is included as standard.