What is the average cost to replace all windows in a three-bedroom house?

The average cost for a full house window replacement in 2026 is between £4,500 and £7,500, depending on materials and location.

How long does it take to replace windows in a full house?

Typically, replacing windows in a full house takes between 3 to 5 days, depending on the number of windows and any additional work required.

What factors can increase the cost of window replacement?

Factors that can increase costs include old frame removal, structural repairs, custom sizes, and additional finishes like painting.

How do regional differences affect window replacement pricing?

Regional differences can lead to higher prices in London and other high-demand areas, while competition in rural regions may lower costs.

What materials should I consider for window replacement?

Common materials include uPVC, aluminium, and wood, with costs varying significantly between them.

Full house window replacement: what to charge in 2026

Introduction

Replacing all the windows in a house is a significant job. As a FENSA-registered installer, knowing what to charge for a full house window replacement in 2026 is crucial for your business. The price can vary widely based on factors like location, material choices, and any additional work required.

In 2026, you can expect to charge between £4,500 and £7,500 for a full house window replacement in a standard three-bedroom house. This range includes labour costs and a typical materials add-on. Understanding regional variations and scope creep will help you provide accurate quotes and manage customer expectations.

Labour Costs

Labour costs in the UK for window fitters can vary significantly. For a full house window replacement, you may consider the following:

London: £200 to £300 per day.
Rest of the UK: £150 to £250 per day.

Assuming a standard three-bedroom house with around 10 windows, you might estimate a timeframe of 3 to 5 days for completion. This leads to potential labour costs of:

London: £600 to £1,500.
Rest of the UK: £450 to £1,250.

Materials Costs

Material costs will depend on the type of windows chosen. For standard uPVC windows, prices in 2026 are expected to be:

uPVC windows: £300 to £500 per window.
Aluminium windows: £500 to £800 per window.
Wooden windows: £700 to £1,200 per window.

Given these figures, for a full house replacement:

For uPVC windows, materials could range from £3,000 to £5,000.
For aluminium, expect £5,000 to £8,000.
For wooden windows, costs could reach £7,000 to £12,000.

Regional Variations

Prices can vary based on location. London typically commands a premium due to higher living costs. You should also consider these factors:

Local competition.
Demand for window replacements.
Transportation costs for materials.

In regions with fewer installers, you might be able to charge more. Conversely, in areas with a high number of fitters, prices may need to be more competitive.

Scope Creep Triggers

Several factors can lead to scope creep, increasing your total job costs. Be aware of:

Old Frame Removal: Additional time may be needed if old frames are difficult to remove.
Structural Repairs: If any structural issues are found during the job.
Custom Sizes or Styles: Non-standard windows can increase both material and labour costs.
Additional Finishes: Extra work like painting or sealing can add to the day count.

Be sure to communicate these potential issues with your customers to avoid misunderstandings.

Using Pencl to Build Quotes

Pencl can assist you in creating accurate quotes. By inputting specific details about the job, you can quickly calculate labour and material costs. This tool helps ensure you consider all factors, including regional variations and potential scope creep, providing transparency to your customers.

Summary

In 2026, you should charge between £4,500 and £7,500 for a full house window replacement, depending on regional differences and the scope of work. Knowing the breakdown of costs will help you provide competitive and fair pricing to your clients.