Extend your Hillsborough with an extension

A flat roof extension is a great way to add extra space to your home without splashing out on the costs of a pitched roof extension. Often exempt from planning permission rules, you can build a flat roof extension up to 3 metres in height as long as it's not visible from a road. But how much do they cost in Hillsborough? To see prices and availability for your job click green button.

HaMuch is Excellent

How HaMuch saves you money

Post your job for free

Post your job for free

We send your job to ALL Hillsborough extension builders

Compare quotes

Compare quotes

Available extension builders in Hillsborough reply

Save Money

Save Money

Select your affordable Hillsborough extension builder

Post your job

From £21,400

Last active Oct 26
Get quotes

T.I Building

T.I Building is a trusted extension builder serving customers in Hillsborough and the surrounding area. Contact us to today to get a competitive qu...

From £21,136

Last active Jun 26
Get quotes

Mount Oriel Conversions & Extensions

Need to find an Extension Builder near you for all your extension buildering work?

Mount Oriel Conversions & Extensions provides a local, t...

From £21,384

Get quotes

Finch Construction NI

Relax... you have found a reliable extension builder in Hillsborough. Finch Construction NI is a friendly and reliable company based in Hillsboroug...

Flat roof extension cost in Hillsborough

Estimates for build a flat roof extension near Hillsborough

A flat roof extension ranges from the cheapest of £21,136 (Mount Oriel Conversions & Extensions based in BT8) to the dearest of £21,400 (T.I Building based in BT28), but these are just estimates. While they give you an idea of who will be better value, the best way to compare costs is to get real quotes. 

Find out how much your flat roof extension will cost in Hillsborough by posting a job with HaMuch. We'll send it to extension builders in Hillsborough.


Estimates for common extension builder jobs in Hillsborough;

Whether you’re looking to extend your kitchen with a side return extension or you want to convert your basement into a liveable space, read our cost guides to get an idea of how much each project costs before getting a more accurate quote from our database of reliable tradespeople.

More extensions & conversions cost guides...