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.
-
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
Extending your house in Birmingham 2025
Whether you're adding space for a growing family or boosting your property's value, this guide breaks down what it costs, what it could be worth — and what to keep in mind when navigating Birmingham’s housing market.
Read more
Measuring your property
Whether you're planning an extension, loft conversion or renovation, precise measurements form the bedrock of your entire project, affecting everything from planning applications to material quantities and contractor quotes.
Read more
Extending your house in Manchester 2025
Thinking of extending your house in Manchester? This guide gives you the facts on what it costs, how much value it can add, and what to watch out for in Greater Manchester’s housing market.
Read more