Wooden Sash Windows

Combining traditional elegance with modern benefits.

georgian sash window in bathroom

What is a sash window?

Sash windows are the vertically-opening windows you often see on traditional buildings. Sash windows come in a variety of different builds and styles. The most common types of sash windows are Georgian, Victorian and Edwardian windows - each varying slightly different in style and number of windowpanes.

How much does a wooden sash window cost?

As our wooden sash windows are all bespoke products, you will naturally see a significant variation in cost. The price is dependent on how big or small the products are, how they're hung (whether they're on lead weights or springs), how difficult we expect the installation to be and what type of glass we need to use. We've compiled a list of what would usally be the average costs for these products, but please bear in mind that we will need to measure your products to get you an accurate costing. We provide site surveys as a completely free service - so there's no reason not to call us and get one of our friendly surveyors around! If what you're looking for isn't on this list, please don't hesitate to get in touch and ask us about it.

1 over 1 sash window

Square Head

1 over 1

£1500 - £1850

2 over 2 sash window

Square Head

2 over 2

£1550 - £1900

Square Head

3 over 3

£1600 - £1950

3 over 3 wide sash window

Square Head

3 over 3

£1600 - £1950

4 over 4 sash window

Square Head

4 over 4

£1600 - £1950

4 over 4 vertical sash window

Square Head

4 over 4

£1650 - £2000

6 over 6 sash window

Square Head

6 over 6

£1650 - £2000

6 over 6 wide middle sash window

Square Head

6 over 6

£1650 - £2000

6 over 6 boxed sash window

Square Head

6 over 6

£1650 - £2000

8 over 8 sash window

Square Head

8 over 8

£1700 - £2050

8 over 8 uneven sash window

Square Head

8 over 8

£1700 - £2050

1 over 1 radius head sash window

Radius Head

1 over 1

£1650 - £2050

2 over 2 radius head sash window

Radius Head

2 over 2

£1700 - £2100

2 over 2 horizontal radius head sash window

Radius Head

2 over 2

£1700 - £2100

4 over 4 radius head sash window

Radius Head

4 over 4

£1750 - £2150

6 over 6 wide radius head sash window

Radius Head

4 over 4

£1800 - £2200

Can't find what you're looking for? Give us a call or send us an email.

Ironmongery Options

Our traditional sash window furniture works well and looks great, with finish options like polished brass and satin chrome to match your space. But if you’re after something different—like a more traditional Fitch fastener, a Brighton fastener, or even a modern locking option—we can usually source and fit those too. Just let us know what you’re looking for.

Fitch Fasteners
Hook Fasteners
Lifters
Restrictor Locks
Square Pulleys
Round Pulleys

Polished Brass

Polished Chrome

Satin Chrome

Polished Brass

Polished Chrome

Satin Chrome

Polished Brass

Polished Chrome

Satin Chrome

Polished Brass

Polished Chrome

Satin Chrome

Polished Brass

Polished Chrome

Satin Chrome

Polished Brass

Polished Chrome

Satin Chrome

Paint Options

Our sash windows are finished in your choice of colour from the RAL Classic range, giving you plenty of flexibility to match your windows to the style of your home. Whether you’re after a crisp white, a bold heritage tone, or something more modern, the RAL palette offers a wide variety of options. We use durable, high-quality microporous paint that’s designed to protect the timber while giving a smooth, long-lasting and breathable finish.

Yellows
Oranges
Reds
RAL 1000
RAL 1001
RAL 1002
RAL 1003
RAL 1004
RAL 1005
RAL 1006
RAL 1007
RAL 1011
RAL 1012
RAL 1013
RAL 1014
RAL 1015
RAL 1016
RAL 1017
RAL 1018
RAL 1019
RAL 1020
RAL 1021
RAL 1023
RAL 1024
RAL 1026
RAL 1027
RAL 1028
RAL 1032
RAL 1033
RAL 1034
RAL 1035
RAL 1036
RAL 1037
RAL 2000
RAL 2001
RAL 2002
RAL 2003
RAL 2004
RAL 2005
RAL 2007
RAL 2008
RAL 2009
RAL 2010
RAL 2011
RAL 2012
RAL 2013
RAL 2017
RAL 3000
RAL 3001
RAL 3002
RAL 3003
RAL 3004
RAL 3005
RAL 3007
RAL 3009
RAL 3011
RAL 3012
RAL 3013
RAL 3014
RAL 3015
RAL 3016
RAL 3017
RAL 3018
RAL 3020
RAL 3022
RAL 3024
RAL 3026
RAL 3027
RAL 3028
RAL 3031
RAL 3032
RAL 3033
Violets
Blues
Greens
RAL 4001
RAL 4002
RAL 4003
RAL 4004
RAL 4005
RAL 4006
RAL 4007
RAL 4008
RAL 4009
RAL 4010
RAL 4011
RAL 4012
RAL 5000
RAL 5001
RAL 5002
RAL 5003
RAL 5004
RAL 5005
RAL 5006
RAL 5008
RAL 5009
RAL 5010
RAL 5011
RAL 5012
RAL 5013
RAL 5014
RAL 5015
RAL 5017
RAL 5018
RAL 5019
RAL 5020
RAL 5021
RAL 5022
RAL 5023
RAL 5024
RAL 5025
RAL 5026
RAL 6000
RAL 6001
RAL 6002
RAL 6003
RAL 6004
RAL 6005
RAL 6006
RAL 6007
RAL 6008
RAL 6009
RAL 6010
RAL 6011
RAL 6012
RAL 6013
RAL 6014
RAL 6015
RAL 6016
RAL 6017
RAL 6018
RAL 6019
RAL 6020
RAL 6021
RAL 6022
RAL 6024
RAL 6025
RAL 6026
RAL 6027
RAL 6028
RAL 6029
RAL 6032
RAL 6033
RAL 6034
RAL 6035
RAL 6036
RAL 6037
RAL 6038
RAL 6039
Greys
Browns
Blacks & Whites
RAL 7000
RAL 7001
RAL 7002
RAL 7003
RAL 7004
RAL 7005
RAL 7006
RAL 7008
RAL 7009
RAL 7010
RAL 7011
RAL 7012
RAL 7013
RAL 7015
RAL 7016
RAL 7021
RAL 7022
RAL 7023
RAL 7024
RAL 7026
RAL 7030
RAL 7031
RAL 7032
RAL 7033
RAL 7034
RAL 7035
RAL 7036
RAL 7037
RAL 7038
RAL 7039
RAL 7040
RAL 7042
RAL 7043
RAL 7044
RAL 7045
RAL 7046
RAL 7047
RAL 7048
RAL 8000
RAL 8001
RAL 8002
RAL 8003
RAL 8004
RAL 8007
RAL 8008
RAL 8011
RAL 8012
RAL 8014
RAL 8015
RAL 8016
RAL 8017
RAL 8019
RAL 8022
RAL 8023
RAL 8024
RAL 8025
RAL 8028
RAL 8029
RAL 9001
RAL 9002
RAL 9003
RAL 9004
RAL 9005
RAL 9006
RAL 9007
RAL 9010
RAL 9011
RAL 9012
RAL 9016
RAL 9017
RAL 9018
RAL 9022
RAL 9023

Timber Options

When it comes to timber choice, we don’t promote one type over another—each option meets our high standards for quality, finish, and durability. The main differences come down to cost and specific properties. Hardwood is around 30% more expensive than softwood and offers a slightly denser grain, while softwood provides a smooth, clean finish at a more affordable price. Accoya, on the other hand, is a specially modified timber designed for exceptional resistance to rot and movement, making it ideal for long-term performance in exposed conditions. Whatever the material, all our windows and doors are crafted to the same exacting standards.

European Redwood

European Redwood is a softwood commonly used for joinery, offering a smooth finish and good workability. It has a warm, pale yellow tone and takes paint and stain well, making it a popular choice for sash windows.

Red Grandis

Red Grandis is a sustainably sourced hardwood with a consistent grain and pale pink to light reddish-brown color. It is durable, stable, and ideal for exterior joinery due to its excellent machining properties.

Accoya

Accoya is a modified softwood known for its exceptional durability, stability, and resistance to rot. It’s ideal for external applications like sash windows and comes with a 50-year guarantee.

Bedroom

Bathroom

Kitchen

Hallway

Living Room

Exterior

two georgian sash windows in the bedroom
victorian sash window in bathroom
navy blue kitchen sash window
hallway sash window
living room curved top sash windows
curved sash windows with black door

Previous Installations

We’ve installed wooden sash windows in all kinds of homes across London, from Georgian and Victorian properties to listed buildings. Every sash window is custom-made and expertly fitted to suit the character of the building. Below, you can explore a selection of videos showing previous installations that include wooden sash windows—so you can see the quality of our work for yourself.

Take a look at our reviews

We pride ourselves on our customer service. Take a look at what some of our previous customers say about us:

Historical Sash Windows

Sash windows have been a key architectural feature in British homes for centuries, evolving in style through the Georgian, Victorian, and Edwardian periods. Each era introduced its own distinct proportions, glazing patterns, and decorative details—from the elegance of Georgian six-over-six panes to the larger, bolder designs of the Victorian and Edwardian styles. This section looks at how sash windows changed over time, offering insight into the design history behind many of the traditional wooden sash windows still found across London today.

Georgian Sash Windows

Georgian sash windows are characterized by their simple, elegant design. They typically feature six-over-six, eight-over-eight panes of glass or nine-over-nine. One of the defining features of Georgian sash windows is their attention to symmetry, with each window having an equal number of panes on each sash.

georgian sash windows on street

Victorian Sash Windows

Advances in glass making by the Victorian period meant that consumers could opt for larger panes of glass. As these designs typically allow more light into the property and are easier to maintain, they proved extremely popular. Victorian sash windows often featured a single, central glazing bar, which gave the windows a cleaner and more streamlined appearance compared to the multiple glazing bars used in Georgian sash windows.

victorian radius head sash window

Edwardian Sash Windows

The Edwardian era saw a trend towards handmade, artistic designs and Gothic-style structures, which influenced the design of sash windows. With the growth of suburbs and larger houses without servants’ quarters, Edwardian sash windows featured larger panes of glass, simpler designs, and a single, central glazing bar for easier maintenance, reflecting the era’s emphasis on functionality and showcasing the homeowners’ wealth and ample living space.

casement window house

Why you should upgrade your sash windows

The sash windows on many properties are usually over a century old. Often they are ill-fitting, draughty, difficult to use and very inefficient. Since the conception of sash windows, technology and quality have improved dramatically. You could be missing out on the benefits of modernised sash windows, casements and doors. Some of the main reasons you should look to upgrade your sash windows are:

sash window security

Bolstered Security

Older sash windows are notoriously prone to security issues - a thief that knows what they're doing can gain access through an old sash window in no time. Modern sash windows come with additional security features and locking mechanisms as standard that outdated windows may not be equipped with.

traditional front of house

Improved Aesthetic Appeal

Modern sash windows have both form and function. Timber sash windows also have a traditional feel that their plastic or aluminium counterparts can’t quite match - hence why they’re still popular.

surveyor and customer

Fully Customisable

Sash windows allow you to style your windows exactly how you want them. Choosing between the number, type and arrangement of windowpanes, hardwood or softwood timber, and double or acoustic glazing means there’s an option for everyone - especially if you’re looking for a change.

man cleaning sash windows

Easy To Maintain

Our products and paints are extremely durable. Under normal circumstances you will not need to paint your sash windows within ten years. It's good practice to check on windows that are more exposed to the elements more regularly.

traditional london home

Increase the value of your home

Any estate agent will tell you that sash windows improve the curb appeal of your propety, adding value and making your home more attractive to buyers.

thermal image

Increased Energy Efficiency

If your home still has it's original sash windows, they're likely to be single-glazed. Higher-quality, thicker timber allows modern sash windows to have double glazing - helping to heat up your home and save you money.

Insurance backed guarantee & FENSA certificate

At Core Sash Windows, all of our windows come with a 10-year guarantee and are FENSA certified. This means the fitter has installed anything from our product range in accordance with strict health, safety and quality standards - meaning you’re getting the best results.

Frequently Asked Questions

Provided you own the home, you do not need planning permission to change, replace or upgrade your sash windows, casements or doors. If you live in rented accommodation, you’ll need permission from the landowner before undertaking renovations.

Outdated sash windows are subject to wear and tear. If they’re not maintained properly, moisture can cause the timber in the frames to rot and weaken. This can cause the wood to warp and buckle - causing drafts and noisy rattling. Some of the signs your sash windows might need an upgrade are: Peeling paint Water Ingress Stiffness on operation Rattling on operation Self-raising or self-lowering Draughts or howling Rotten timber Bending, bowing or breaking of the timber However, with proper maintenance, sash windows can remain in tip-top condition for decades with the right fitter and quality materials. If you’ve noticed these symptoms on your windows, it might be time for an upgrade. Get an instant quote or contact us today to find out how we can help you fit your dream windows.

Modern sash windows are incredibly safe. While contemporary sash windows may have been more susceptible to break-ins in the past, stronger double glazing, more durable timbers and security features - like sash window screw locks and fasteners - mean security issues are no longer a concern.

Yes, you can. Modern sash structures can support thicker, more durable timber, offering more room for double glazing and improved insulation - should you upgrade.

Measuring your sash windows may seem complicated, but it can be done in three easy steps. Extend the measuring tape down the entire vertical length of the sash box and record the measurement. Extend the measuring tape across the horizontal width and record the result. Send the measurements off to us - we’ll handle the rest. It’s crucial to remember that these measurements are only accurate for sash replacements. If you need the sash box changed as well, add 135mm to the vertical length and 150mm to the width to cover the measurements for the additional box unit. If you need additional assistance or are just unsure, we’ll conduct a no-obligation survey - free of charge - to give you peace of mind knowing everything’s being handled correctly.

Yes, it is possible to soundproof sash windows. While additional glazing reduces the sound naturally, discreet acoustic glass can be fitted for soundproofing. Looking for new sash windows? Core Sash Windows boast an extensive range of fully-customisable windows, casements and doors to fit all specifications. Book your free measuring and evaluation by getting an instant quote and transform your home today.