Designing a double storey extension — types, size and permissions for your build

a large double storey extension to a modern property
(Image credit: French + Tye for Bradley Van Der Straeten Architects)

Adding a double storey extension to your home can sometimes be a better option than selling up and moving to a larger house.

Not only can it be cost-effective if planned out well, but it can avoid the potential issues that come with moving home, such as finding an area and house that all the family love as well as one that has decent transport links for work as well as excellent schools, where relevant.

A black and white image of a man in a suit with glasses but no tie
Carl Huntley

Carl spent a decade working for different architectural practices around the world, before founding Base Architects in 2003.

He has handed large scale projects with multi-million pound budgets and has also been involved with successfully lobbying the government over building regulation legislation.

A man with glasses and a grey beard wearing a yellow T-shirt and a blue jacket
Darren Bray

Darren spent several years working on community schemes and high end homes before setting up Studio B.A.D in 2019 with a focus on environmental, political and economic challenges.

He now also works with student architects at Reading School of Architecture as well as being an examiner at Hertfordshire School of Architecture among others.

An experienced homes journalist and editor, Lucy has written about renovation, property and gardens since 1990, first working her way around the interiors departments of women's magazines before switching to interiors-only titles in the mid-nineties. She was Associate Editor on Ideal Home, and Launch Editor of 4Homes magazine, before moving into digital in 2007, launching Channel 4's flagship website, Channel4.com/4homes. 

In 2018, she became Global Editor in Chief for sister website Realhomes.com, taking the site to a global success. She is now Global Editor in Chief of Homebuilding's sister site Homes & Gardens. She is also a serial renovator and owns rental properties.