How Much Do Flush Casement Windows Cost in 2026?

If you love the traditional appearance of timber windows but want the low maintenance and performance of modern uPVC, flush casement windows are becoming an increasingly popular choice.

They work particularly well on cottages, period properties and country homes throughout Dorset, but they can also give newer properties a more premium appearance.

One of the first questions we are asked is:

How much do flush casement windows actually cost?

The answer depends heavily on the size, design and specification of the windows, but in this guide we explain what you should expect to pay and what affects the final price.

How Much Does a Flush Casement Window Cost?

As a broad UK guide, a standard uPVC flush casement window supplied and fitted can often cost around £400–£600, although smaller or simpler windows may cost less and larger, more detailed windows can cost considerably more.

A full house of flush casement windows can therefore run into several thousand pounds depending on the number of windows and the specification chosen.

These figures should only be used as a rough guide.

At Goldhill Glazing, we price every installation individually because two windows of exactly the same size can have very different costs depending on their design.

What Makes Flush Casement Windows More Expensive?

Flush casement windows generally cost more than a standard uPVC casement window.

The biggest difference is the design.

On a traditional uPVC window, the opening sash sits proud of the outer frame. With a flush casement window, the sash sits level with the frame when the window is closed.

This creates the flatter, more traditional appearance associated with timber windows.

There are then several other factors that can affect the price.

Window Size

Unsurprisingly, larger windows require more frame material and more glass.

A small bathroom window will therefore normally cost considerably less than a large three-section lounge window.

Number of Openers

The configuration of the window makes a significant difference.

A fixed pane is generally less expensive than an opening sash because an opening window requires additional profile, hinges, locking mechanisms and hardware.

Colour and Foil

White uPVC will normally be the most economical option.

Many customers choosing flush casement windows, however, are looking for a more traditional appearance and select colours such as:

• Agate Grey
• Cream
• Chartwell Green
• Anthracite Grey
• Black
• Irish Oak
• Heritage-style woodgrain finishes

A woodgrain foil can dramatically change the appearance of a uPVC window and help create a much more convincing timber effect.

Georgian or Astragal Bars

If you are trying to recreate the appearance of traditional timber windows, Georgian-style bars can make a huge difference.

Proper external astragal bars create considerably more depth and character than simply having a decorative bar inside the glass.

They will, however, increase the cost of the window.

Glass Specification

The type of glass required can also affect the price.

Depending on the location of the window, you may require or choose:

• Toughened safety glass
• Laminated security glass
• Obscure privacy glass
• Acoustic glass
• Triple glazing
• Decorative glass

Hardware

Handles, stays and other hardware can also be chosen to complement the property.

For traditional cottages and period homes, heritage-style hardware can help finish the timber-look appearance.

Are Flush Casement Windows Worth the Extra Cost?

For the right property, we believe they can be.

A standard uPVC casement window is an excellent option when value and performance are the main priorities.

However, if the appearance of the property is particularly important, the flush design can make a substantial difference.

This is especially noticeable on:

• Dorset cottages
• Stone properties
• Farmhouses
• Period homes
• Traditional new builds
• Properties where existing timber windows are being replaced

From the outside, the flatter sash gives the window a much more traditional appearance.

When this is combined with a realistic woodgrain finish, traditional proportions and carefully chosen hardware, modern uPVC can provide much of the character people associate with timber without the same level of maintenance.

Flush Casement Windows vs Timber Windows

Traditional timber windows can look fantastic, particularly on older properties.

The downside is that timber requires ongoing maintenance to keep it looking and performing at its best.

Modern timber-look uPVC flush casement windows provide another option.

They can offer:

• A traditional flush appearance
• Modern double glazing
• Excellent thermal performance
• Multi-point locking
• Low maintenance
• No regular repainting
• A wide choice of heritage colours and finishes

For many homeowners, this provides a good balance between traditional appearance and modern practicality.

How Can You Make uPVC Windows Look More Like Timber?

Not all flush casement windows look the same.

If creating an authentic timber appearance is the priority, it is worth looking beyond simply choosing a flush sash.

Details such as the proportions of the window, colour, woodgrain texture, glazing bars, hardware and frame design all contribute to the finished appearance.

A well-specified timber-look window can look very different from a basic white uPVC window even though both are technically made from the same material.

This is why we recommend choosing the specification around the property rather than simply choosing the cheapest flush window available.

What About Conservation Areas?

Flush casement windows are often considered for period properties and homes within conservation areas because of their more traditional appearance.

However, living in a conservation area does not automatically mean that any timber-effect uPVC window will be acceptable.

Planning restrictions can differ between properties and locations, and some homes may also be affected by an Article 4 Direction or listed-building requirements.

If your property is subject to planning restrictions, you should check what permissions apply before replacing the windows.

Flush Casement Windows in Dorset

Goldhill Glazing supplies and installs flush casement windows throughout Dorset and the surrounding areas, including Shaftesbury, Gillingham, Blandford Forum, Sturminster Newton, Sherborne, Wincanton, Tisbury and surrounding villages.

We particularly like flush casement windows for the traditional properties found throughout this part of Dorset.

Rather than using the same window specification on every property, we can help you choose the colour, glass, hardware and design that best suits your home.

Get a Price for Flush Casement Windows

Because window sizes and specifications vary so much, the most accurate way to establish the cost is to have the windows measured and priced for your property.

If you’re considering flush casement windows in Dorset, Goldhill Glazing can provide a free quotation and talk you through the different options available.

Contact Goldhill Glazing today to arrange a free, no-obligation quotation.

For prices across all window styles, read our guide to how much new windows cost in Dorset.