GH ROUNDELBuild Cost Calculator

A house extension could add value to your home. If you are planning to extend your property why not use our free cost calculator to get a quick estimate of your build costs.

Need to kit out your brand new extension with the latest interiors? Get everything you need under one roof at The Ideal Home Show sponsored by Zoopla!

Style*

Tell us about what you need

Type*

Size of Extension

Image of layout
Image of layout

Roof Style*

Extension Options

Tell us about yourself

Thank you for using our cost calculator.

Please provide your name and email to complete your quote.

Please tick here to receive emails to keep you up to date with our latest announcements, news, competitions, offers and discounts from The Ideal Home Shows and our sister magazine Good Homes
You can opt out at any time by using the link provided in every email. Your personal information will only be used as set out in our privacy policy.

Show NewsView All

2019-tickets-on-sale-now

2019 tickets on sale now!

Read MoreBack my popular demand, tickets for our 2019 show are already on sale!  Every year we say hello to...

Headline Sponsor

Our 2018 Sponsors

Headline Sponsor

Zoopla

Show Sponsors

British Gas
Hydropool
Express Bifolding
Britelite Windows
Nationwide Building Society
Crown Paints

Media Partners

Magic 105.4 logo
Good Homes Magazine

Charity Partner

The Not Forgotten Association

Even more from the Ideal Home Show

Ideal Home Show Scotland

Ideal Home Show Scotland

The only place to visit when making your home ideal.

Eat & Drink Festival

Eat & Drink Festival

The UK's newest food festival

Ideal Home Show Christmas

Ideal Home Show Christmas - London

Everything you need to prepare your home for the festive season.

Good Homes Magazine

Good Homes Magazine

Britain's fastest-growing homes magazine