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A home extension can completely change the way you live – more space, better flow, and the chance to shape your home around your lifestyle and needs.
But how do you find house extension builders near you that are up to the job? That's where Checkatrade comes in.
Read on to find house extension builders who are checked, reviewed, and ready to help turn your extension plans into reality.
Find house extension builders near you
How to find house extension builders near you
1. Search your postcode
First, enter your postcode into the search tool to see the checked house extension builders who operate in your area.
2. Compare options
Then, view company profiles, read real customer reviews, and browse photos of completed projects to help shortlist the options that best match your needs.
3. Get in touch
All that's left to do is contact your chosen contractors to discuss your requirements and request quotes.
4. Use the Checkatrade app
Keep all your messages and quotes in one place and track progress from first enquiry to finished job.
Find house extension builders in your area
Find related services you may need
Before you start, check whether your plans fall under permitted development or if they need planning permission. This can save time and unexpected costs later in the process.
Why hire a house extension builder?
A home extension is a dream project for many homeowners. It can solve space-related challenges, is cheaper and less stressful than moving house, and can increase the value of your home.
Popular home extension projects in the UK include:
Adding an extra bedroom or bathroom
Creating a larger kitchen or living area
Building a home office or utility room
Whatever your reason, a skilled extension builder can help turn your vision into a structurally sound, compliant, and well-finished space.
What does a house extension builder do?
Your chosen contractor will be able to guide you through the process of building an extension, but here's a brief
outline of what you can expect:
Site surveys and groundwork
Structural work, including foundations, walls, and roofing
Plumbing, electrics, and insulation
Internal finishing and decoration
Depending on your plans, you may also need an architect or structural engineer to ensure your designs comply with Building Regulations.
For more detailed information, take a look at our house extension planning guide.
How much does a home extension cost near me?
The average cost of a house extension ranges between £30,000–£140,000 for a single storey, and £108,000–£180,000 for two storeys.
And the expected return? A well-executed house extension can add 10-20% to your home’s overall value.
That said, there’s no 'one size fits all' option when it comes to expanding your home. Variables include:
The size and complexity of the extension
The type of extension and its location
The material costs
Where you live in the UK
Our cost of building an extension guide has plenty more information.
Your building project may require several different skills, but at Checkatrade, we've got you covered. Find checked and reviewed plumbers, electricians, plasterers, carpenters, and more, all in one handy place, all committed to quality and a job done right.
Need a job estimate to help with budgeting?
Try our AI powered job estimate calculatorQuestions to ask before hiring
A home extension is a major renovation project and a sizeable investment in your home. Before you commit, it’s worth asking your shortlisted contractors a few key questions:
What similar projects have you completed recently?
Can I see examples or photos of previous work?
What’s included in your quote, and are there likely to be extra costs? (labour, materials, and any extra costs such as waste disposal, permits, fees, etc)
How will you manage planning permission and building regulations?
Do you have adequate and up-to-date public liability insurance?
What’s your payment schedule? (Avoid paying the full cost upfront.)
This allows you to more easily compare prices and services like-for-like, helping you to choose the right option for your project.
Why use Checkatrade to find house extension builders near you?
Checked - Every Checkatrade member must pass up to 12 checks and commit to upholding the Checkatrade Standard
Reviewed - Over 6.2 million reviews have been published on Checkatrade
Guaranteed - Jobs booked through Checkatrade are covered up to £1,000 - T&Cs apply
Request a quote, search in the Checkatrade app, or enter your postcode below to find house extension builders near you.
Find house extension builders near you
FAQs about house extension projects
The first step in planning an extension is setting a budget and researching house extension builders in your area.
Use Checkatrade's free search function to find and contact checked contractors to discuss your requirements and request quotes. Then consider hiring an architect to refine your plans and ensure compliance with Building Regulations.
You don't legally need an architect for a home extension, but hiring one can help with design, planning, and compliance, helping to navigate complex regulations.
They will also ensure your extension looks and acts the part — delivering the style and practicality you desire — within your designated budget.
A small single-storey extension may take 8–12 weeks to build. Larger or two-storey builds can take several months, depending on complexity and the weather conditions.
It's often possible to live in your home while your extension is being built, though there may be periods where water, heating, or electricity are out of action. Make sure to discuss logistics and timelines with your builder early on to help minimise stress and disruption.
Some extensions fall under permitted development, but larger or taller builds usually need planning approval.
Single-storey rear extensions can typically extend up to 6 metres (or 8 metres for detached homes) without permission
You must get planning permission if your intended build will be higher than the highest part of the existing roof
Single-storey rear extensions cannot extend beyond the back wall of the original house by more than four metres for a detached house, or more than three metres for a terraced or semi-detached house
Single-storey extensions can’t exceed four metres in height without planning permission
Side extensions cannot go beyond four metres in height, can only be one storey, and can only be up to half the width of your house
Always check with your local authority whether planning permission is needed before starting your project.
The 50% rule refers to permitted development limits, which cap how much you can extend without full planning permission based on your original plot size. Always check with your local council or builder before finalising plans.
Yes, £40,000 to £50,000 can be enough for a small single-storey extension with a standard specification. However, whether your budget is sufficient depends on the size of the extension, the quality of the finishes, and any structural or groundworks required. Getting quotes from local extension builders is the best way to understand what your budget can realistically achieve.
