Planning Cost Calculator

Ready To Build Your Dream Extension?

Discover how much it will cost to build your extension
with Planning Approval Gauranteed!

You'll have a million questions and may be worried about what comes next, you may be concerned about what you actually need to do to build an extension, but also you might find yourself asking:

• What if my neighbour doesn't agree?
• How do I avoid the cowboys? YeeHaaaw
• How much does all this planning permission cost?
• And most importantly how do I stop the build costs from spiralling out of control when we start building?

Let Us Talk You Through The Steps

By filling in this short 30 second online quiz, you'll get peace of mind, and also:

• An estimated cost on your planning permission
• A ballpark figure of how much your extension will cost
• 7 insider tips on how to avoid cowboy builders

Answer a few questions, then we will firm it up with a tailored estimate - then find out if we can guarantee planning permission during a free planning audit worth £295.

By completing this, you'll have a guideline cost for your extension's planning permission, and roughly how much it will cost to build your extension.

First help us understand your current property type & size so that we can weigh up the costs for measuring and drawing your property as it is now.

Your local planning department need existing floor plans & elevation views as part of any planning application, we'll handle this for you, but first we need to know a bit more about your property.

Choose Your Current House Type

Bungalow

Detached

Semi-Detached

Terraced

Dormer Bungalow

Your Current Property Size

Choose Your Desired Extension

What type of extension or conversion are you considering?

Garage Conversion

Simple single storey extension (Side OR Rear Only)

Wrap around single storey extension (Side AND Rear)

Double storey extension (Side OR Rear)

Loft Conversion

Loft Conversion & Single Storey Extension

Multiple Extensions - side & rear

Loft Conversion & Double storey extension

Outbuilding/annex to garden area

The design stage is all about measuring your current property, and drawing out your desired extension. This gives you a clear visual of what your new home will look like.

Then we need to get these new plans approved by your local authority.

Did you know we have a planning approval guarantee!!

Do you know what type of planning application you need?

if you dont know, select unknown, we will find this out for you - if you do know choose from the list below.

We draw out your extension, prepare your planning application, submit it to the Local Authority, and make sure it all goes through smoothly.

We are with you every step of the way...

What Is Building Regulations?

Before you can build your extension, building control need to assess the following information before granting you permission to carry out the building works. This is another step that happens after planning permission approval from the council.

Our building control price in your estimate includes:

• Costs for Structural Engineers who specify what steels are needed
• Costs for detailed construction drawings for your builders to use
• Costs for Building Regulations approval including site inspections during the build

Click next to gauge your build costs.

The building control stage covers everything you need to legally start building your extension.