Extension quoter - an online cost calculator for your home extension!

Get online quotes quickly and without any pressure using our home extension building cost calculator.

And we take extra steps to protect your details.

Get quick online quotes

Extension quoter - an online cost calculator for your home extension!

Get online quotes quickly and without any pressure using our home extension building cost calculator.

And we take extra steps to protect your details.

Get quick online quotes

We've already helped over 2 million UK homeowners.
Find local builders and get a quick online extension cost calculation.

Get online quotes for a home extension using our online extension cost calculator

How much does a home extension cost?

Use our home extension cost calculator to get an average price for your building project before seeing a salesperson.

Find local experts in your area for any type of home extension project in the UK.

It takes less than three minutes - click to find out an average cost for building an extension on your home

Join the 2 million UK homeowners we have already helped with our online quoter service.
Get quick online quotes

We've already helped over 2 million UK homeowners.
Find local builders and get a quick online extension cost calculation.

Get online quotes for a home extension using our online extension cost calculator

How much does a home extension cost?

Use our home extension cost calculator to get an average price for your building project before seeing a salesperson.

Find local experts in your area for any type of home extension project in the UK.

It takes less than three minutes - click to find out an average cost for building an extension on your home

Join the 2 million UK homeowners we have already helped with our online quoter service.
Get quick online quotes

Get your guide price

Take just two minutes and answer questions to find out a fair guide price for your project.

Actual quotes will vary, but our tool aims to help you feel more confident when speaking with companies.


We find local companies

Take it easy while we find you up to four local companies. We ask them to get in touch to provide you with genuine quotes.

You can then choose the best company using our past homeowners feedback.


Share your feedback

Help out your neighbours, and improve our service! Tell us about your experience with the companies we send.

This will be seen by all of our future homeowners - and it will help them choose the best company too!


We Protect Your Details

online quotes with data protection

We have clever software that hides your phone number from our companies. This software turns your contact information into a code, keeping it safe.

online quotes with data protection

So, whenever our companies call you, they do so through a code. They don't see your contact details until you choose to share them yourself.

online quotes with data protection

We do this to keep your data as safe as possible. And so that you're in control of your own data protection. You can share your details with any company if you want to, but up until then we will keep your details safe.

We Protect Your Details

We have clever software that hides your phone number from our companies. This software turns your contact information into a code, keeping it safe.

So, whenever our companies call you, they do so through a code. They don't see your contact details until you choose to share them yourself.

We do this so that you're in control of your own data protection. You can share your details with any company if you want to, but up until then we will keep your details safe.

Find out extension costs in the UK: