Sash windows remain a timeless favourite for UK homeowners, bringing elegance, heritage charm, and practicality to all kinds of properties. Whether you’re living in a classic Victorian terrace or designing a new-build home with traditional aesthetics, sash windows offer a perfect blend of style and function.
But one question always comes up: How much do sash windows cost in 2026?
Let’s answer that straight away.
In 2026, sash windows in the UK typically cost between £500 and £2,000 per window, depending on the size, glazing type, frame material, and installation complexity. Some premium timber options or custom designs may go beyond this range, while basic uPVC models can come in lower. You can also use our sash window cost calculator for your ease.
This guide will walk you through everything you need to know—types, pricing, pros and cons, and ways to get the best value for your investment.
Restoration or Replacement: What Should You Choose?
Before jumping into pricing, it’s important to decide whether you need restoration or full replacement windows.
Restoration Costs
Restoring original sash windows involves paint stripping, repairing or replacing rotten wood, updating the hardware, improving glazing, and adding draught-proofing. This kind of careful work typically costs between £500 and £2,000 per window.
If you live in a conservation area or own a listed property, restoration may be your only option—but it often takes more time and may need repeated maintenance every few years (like repainting).
Replacement Costs
If your existing windows are beyond repair, replacing them makes more sense. New sash windows cost around £1200 to £1800 on average, depending on the style, glazing, and frame material.
Modern replacements (especially in uPVC or timber-look uPVC) provide better thermal performance and require much less maintenance.
If you are living in listed buildings where local authorities won’t allow you to replace your existing windows then you can choose the option of secondary glazing which offers similar benefits without changing the style and looks of your existing windows.
Comparing Frame Materials: uPVC vs Timber vs Aluminium
✨ uPVC Sash Windows Cost
uPVC sash windows is by far the most popular choice for modern sash windows in the UK today. It offers:
- Great insulation
- Low maintenance (no repainting needed)
- Competitive pricing
Expect to pay around £800 to £1600 per window, including installation. White is the most cost-effective colour, while woodgrain finishes or coloured frames can increase costs by 30% to 50%.
🌳 Timber Sash Windows Cost
For traditional aesthetics, nothing beats real wood. You can choose:
- Softwood: Starts around £1500 per window
- Hardwood: Can go up to £2,500 or more
While they look beautiful, timber sash windows do need ongoing care, like repainting every 5–6 years. But if you’re in a period home, the authenticity may be well worth the cost.
🔬 Aluminium Sash Windows Cost
Aluminium sash windows are less common but ideal for modern properties. Expect to pay £1200 to £4000+ per window. They offer a sleek finish, excellent durability, and low maintenance.
Use Our Online Configurator: See Prices Instantly
Not sure where to start? Use our Sash Window Configurator to:
👉 Customise your window size, colour, glazing and features
👉 See your design take shape in real-time
👉 Get an accurate, tailored quote instantly and order online right away
It’s a quick, easy way to visualise your new windows and check how different choices affect the final cost.
What Affects the Cost of Sash Windows?
✔️ Size & Weight
Larger sash windows need more materials, heavier balances, and stronger frames, which naturally increases the price.
✔️ Glazing Options
Larger sash windows need more materials, heavier balances, and stronger frames, which naturally increases the price.
- Double glazing: The most common and cost-effective
- Acoustic or laminated glass: Higher price due to weight and specialist materials
- Heavier glass means bigger counterbalances, which also adds cost
✔️ Bar Designs: Astragal vs Georgian
Larger sash windows need more materials, heavier balances, and stronger frames, which naturally increases the price.
- Astragal bars are mounted on both sides of the glass and look more traditional. These cost more because they require extra labour.
- Georgian bars are fitted between the glass panes, giving a similar look at a lower price.
More complex arrangements (like Georgian grids) usually increase costs due to more bar materials and labour.
✔️ Colours & Finishes
- Standard white: included in base price
- Colour bonded frames: can add 30–50%
- Woodgrain or matte textures also increase the cost
✔️ Optional Features
Want something extra?
- Arched heads: +£500 per window
- Premium timber architraves
- Security locks and restrictors
All these add-ons enhance the look or performance but also bump up the price.
Still not sure and want exact cost?
Use our Sash Window Configurator to customise your window size, colour, glazing and features and get an accurate, tailored quote instantly & order online right away.
Installation Costs: What to Expect
Installation charges are typically £200 to £450 per window, depending on your location and project complexity.
- New-builds: simpler, cheaper install
- Replacements: more work removing old units = higher cost
- Listed buildings: may require specialist installation or planning approvals
Always ask your supplier for an itemised quote that separates supply and labour so you can compare.
Long-Term Value: Why It Pays Off
While sash windows might seem like a big upfront cost, they’re a solid long-term investment:
- Energy savings: Double-glazed windows can save you £75–£200 a year
- Curb appeal: Boost your home’s value by up to 4%
- Comfort: Say goodbye to draughts, condensation, and outside noise
Plus, uPVC and aluminium options need very little upkeep compared to traditional timber.
FAQs About Sash Window Costs
Final Thoughts
Sash windows are more than just a design feature—they’re an investment in your home’s comfort, efficiency, and style.
Whether you’re restoring a single window or replacing all of them, knowing what affects the price helps you make confident, informed choices. And with tools like our online configurator, you can see costs clearly, compare your options, and make the right decision for your home.
Want to get started?
Try our uPVC sash windows configurator today and see how affordable your ideal sash windows could be.
