What to Expect During a Home Extension

Planning a home extension is a fantastic way to create more space, boost your property’s value and tailor your home to suit your lifestyle. Whether you are imagining a larger kitchen, an extra bedroom or a new open-plan layout, understanding what’s involved will help you feel more confident at every stage.

This guide explains the key phases of a typical home extension so you know what to expect, from the first ideas to the final walkthrough.

Key Stages for Homeowners

Planning and Preparation

Creating a Project Brief

Start by outlining what you want from your extension. Think about how you’ll use the space, what your priorities are and any must-have features. Setting a clear budget and realistic timeline helps everyone stay on the same page from the start.

Working with a Design Professional

An architect or designer will bring your ideas to life while making sure your plans are practical and meet building regulations. They’ll help you make the most of your space and avoid costly mistakes.

Understanding Permissions

Some extensions fall under permitted development, but others will need planning permission. You may also need building regulations approval or a party wall agreement if your extension affects shared walls or boundaries. Sorting these early avoids delays later on.

Building the Extension

Site Preparation

Before any building work starts, the site is cleared and prepared. This includes setting up safety measures, deliveries and waste management.

Laying the Foundation

A solid foundation is essential. The type used will depend on your soil and extension size, but your builder and designer will guide this based on what’s needed.

Framing the Structure

This is when your extension begins to take shape. The framework, walls, and roof are constructed using either timber or prefabricated sections, depending on your design.

Windows and Doors

Installing glazing and doors helps seal the structure and improve insulation. You’ll also get to see how light moves through the new space.

Roofing and Drainage

The roof is built, weatherproofed, and connected to your existing drainage system. At this point, your extension is watertight and ready for internal work.

Interior Work

Fixtures and Layout Adjustments

This is where internal walls are shaped, plumbing and electrics go in, and any old features are removed or adjusted to suit the new layout.

Insulation and Structural Reinforcement

Your builder will install insulation and make sure the structure meets safety standards. This helps keep your home warm and efficient.

Internal Fit-Out

Once the structure is secure, the inside is finished with plastering, wiring, flooring, and new fittings like doors and cupboards. Your extension now feels like a real part of the house.

Final Touches and Completion

Decorating and Finishing

Your chosen finishes are applied, from paint colours and lighting to kitchen units or bathroom suites. This is when the space starts to feel personal.

Final Checks and Handover

Your builder or project manager will do a final walkthrough, fix any remaining snags and ensure everything meets building standards. You’ll also get key documentation like warranties or sign-off certificates.

‍Planning a home extension in the North-West?

Whether you're extending your kitchen, adding a bedroom or creating more space for your family, our experienced team is here to help. We offer expert advice and full project support across Wigan, Warrington, Bolton and Worsley. Call us today on 07429 519 982 to get started.

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