Get your home extension build right from the start
Clear estimates. Smarter decisions. Sidestep common issues.
Plan with Confidence from Day One
Start your project with a clear understanding of costs and options. We give you everything you need to make informed decisions and avoid surprises along the way.
Avoid Common Issues Before They Happen
We help you spot potential challenges early, leveraging builder-backed insights and thorough checks on local building restrictions.
Stay in Control Throughout Your Build
Easily adjust your estimate as your extension plans evolve, ensuring your project stays on track, on time, and within budget.
How it works
We flip the traditional building process on its head.
Instead of relying solely on architects and contractors later in the game, we bring builder expertise into the project from day one. We provide you with clear cost estimates, insights into common issues, and a roadmap to navigate your build. With PlanningToBuild, you can plan smarter, avoid delays, and stay in control of your project—all from the start.
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Tell us about your extension plans
Start by entering the key details about your home extension, including the dimensions and desired layout. Whether you're adding a new room or expanding an existing space, our easy-to-use form captures everything we need to provide an accurate estimate.
Once you've input your basic information, you'll receive a cost breakdown based on your choices. From there, you can customize everything from fixtures to finishes, ensuring your extension meets your exact needs and budget.
It really helps me bring everything together in my mind, allowing me to provide my architect with a much clearer and more concrete vision. I feel like I have much more control over the starting point of my project.
Frequently Asked Questions
Our Guides
Use our collection of guides to help get your home extension build right from the start
Don’t get caught out: what to look for in a builder’s quote
So you're ready to hire a builder for your extension. Before you commit to anything, take a good, hard look at the quote.
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Home extension costs: why price per square metre isn’t enough
Price per square meter is a helpful starting point, but not enough on its own to accurately plan or budget your extension.
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What you need to know about building an extension on green belt land
The rules for development on Green Belt land are much stricter than in other areas so you'll need to tread carefully.
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