Step-by-Step Guide to the House Extension Process in the UK
Thinking about expanding your living space? Whether you need an extra bedroom, a bigger kitchen, or simply want to boost your home’s value, planning a house extension can feel overwhelming at first. But with the right information, it becomes much more manageable.
In this blog, we will provide a step-by-step guide to the house extension process in the UK, designed to help homeowners plan with confidence.
What Is the House Extension Process in the UK?
A house extension involves adding extra space to your existing home, usually at the rear, side, or even above. It’s one of the most popular home improvement projects in the UK, and for good reason—it allows you to stay in the home you love, without the hassle of moving.
But before any work begins, understanding the entire house extension planning process is crucial to avoid costly delays or mistakes.
How to Plan a House Extension: Key Steps You Need to Know
Before you start knocking down walls or calling a builder, it’s important to follow these essential steps to make the process smooth and successful:
Understand Your Why
Think about what you need from the extension. More space for a growing family? A home office? A luxury kitchen? This will guide your decisions throughout the process.
Explore Design Ideas
Start gathering inspiration. Do you want an open-plan layout or separate rooms? Consider layout, lighting, and how the new space connects to the rest of your home.
Consult the Experts
Get in touch with professionals early. At this stage, a local specialist like Doran Bros Construction can help you align your ideas with practical and legal requirements.
House Extension Planning Process: Do You Need Permission?
Not every extension needs planning permission, but many do. It depends on the size, location, and impact of the extension.
Planning Permission vs. Permitted Development
Some extensions fall under permitted development rights, meaning you don’t need full planning permission. But there are limits, especially if you’re in a conservation area or altering the front of the house.
Submitting an Application
If planning permission is required, your builder can help submit the application. It usually takes 8–10 weeks for a decision.
Don’t Forget Building Regulations
Even if you don’t need planning permission, you’ll still need approval to ensure your extension meets safety and energy standards.
House Extension Steps: What Happens Once Work Begins?
Once permissions are sorted and the design is finalised, the house extension process in the UK begins. Here’s how it typically unfolds:
1. Site Preparation: The team clears and prepares the area. Utilities may be moved, and foundations are dug.
2. Structural Work: This includes building the walls, roof, and any required steel supports.
3. Interior Works: Plumbing, electrics, insulation, plastering, and flooring come next.
4. Final Touches and Inspection: The space is decorated, cleaned, and inspected before handover.
How Long Does a House Extension Take in the UK?
On average, a single-storey extension takes 8 to 16 weeks. Larger or more complex extensions can take 4 to 6 months. Factors like weather, planning delays, or design changes can affect the timeline.
House Extensions in South London: Why Local Experience Matters
Choosing a builder experienced in house extensions in South London ensures a smoother house extension process in the UK. From navigating local regulations to managing neighbourhood logistics, local know-how saves time and stress.
At Doran Bros Construction, we bring over 30 years of experience in designing and delivering stunning, functional home extensions throughout South London.
Extend Your Home With Doran Bros Construction
From your first idea to the final coat of paint, Doran Bros Construction is with you every step of the way. We understand every part of the house extension process UK homeowners go through—and we make it simple.
Get in touch with us today to take the first step toward your dream home extension. Let’s build the extra space your home deserves.