How to Improve Your Home with a House Extension: A Complete Guide

Thinking about adding more space to your home? A house extension is one of the most effective ways to increase living space, improve functionality, and boost property value — without the hassle of moving. Whether you’re expanding your kitchen, adding an extra bedroom, or creating a stylish home office, a well-planned extension can completely transform how you live.

 

In this guide, we’ll explore everything you need to know before you start your extension project — from design ideas and planning permission to budgeting and finding the right builder.

 

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 What Is a House Extension?

 

A house extension involves adding extra rooms or expanding existing areas of your home. This could mean building outwards into your garden, upwards with a loft or second-storey addition, or even extending a garage.

 

Common types of extensions include:

 

• Single-storey extensions: Ideal for larger kitchens or open-plan living spaces.

• Double-storey extensions: Perfect for adding bedrooms or bathrooms above ground level.

• Rear extensions: Extend your property into the garden for more indoor-outdoor flow.

• Side return extensions: Make the most of unused side space, common in terraced homes.

• Wrap-around extensions: Combine rear and side extensions for a dramatic transformation.

 

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 Do You Need Planning Permission?

 

Whether you need planning permission depends on the size and design of your extension. Many smaller projects fall under permitted development rights, meaning you may not need full approval — but it’s always best to check with your local planning authority.

 

As a general rule:

 

• Extensions must not exceed half the land area of the original house.

• Materials should match the existing property’s appearance.

• Extensions facing a highway may require formal permission.

• Neighbouring properties’ privacy and light should not be affected.

 

If you live in a listed building or conservation area, you’ll definitely need planning consent.

 

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How Much Does a House Extension Cost?

 

Costs vary depending on the size, design, and materials. In the UK, you can expect to pay roughly:

 

• £1,500 – £2,500 per m² for a standard single-storey extension.

• £2,000 – £3,000 per m² for a double-storey extension.

 

Keep in mind that features such as bespoke glazing, bi-fold doors, or underfloor heating can increase costs. Always include an extra 10–15% contingency in your budget for unexpected expenses.

 

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 Planning Your Design

 

When planning your design, think carefully about how you’ll use the new space and how it connects with the rest of the house.

 

Tips for effective design:

 

• Ensure plenty of natural light with skylights or large windows.

• Choose energy-efficient materials to reduce heating bills.

• Maintain a cohesive style with your existing architecture.

• Consider future needs, such as accessibility or resale value.

 

Hiring an architect or design-and-build company can help bring your vision to life while keeping the project compliant with building regulations.

 

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 Finding the Right Builder

 

A quality builder can make or break your project. Look for:

 

• Verified reviews and recommendations on trusted platforms such as MyBuilder.

• Examples of previous extension work.

• Clear, written quotes and contracts.

• Builders with good communication and attention to detail.

 

Avoid accepting the lowest quote without checking credentials — quality workmanship ensures your investment stands the test of time.

 

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 Adding Value to Your Home

 

A well-executed extension can increase your property’s value by up to 20–25%, especially in high-demand areas. More importantly, it creates a space that suits your lifestyle and enhances everyday comfort.

 

Whether you’re planning to sell or simply want to enjoy more room, a thoughtful extension is a smart investment in both your home and your future.

 

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Final Thoughts

 

A house extension can be one of the most rewarding home improvements you’ll ever undertake. With careful planning, professional advice, and quality craftsmanship, you can achieve a beautiful, functional space that perfectly fits your needs.

 

Before you start, remember to:

Check planning regulations

Set a realistic budget

Hire trusted professionals via MyBuilder

Focus on design and sustainability

 

Transform your home today — because more space means more possibilities.