• The Hogwarts-style towers - estimated to cost around 150,000 – are so big that they need planning permission
  • The two houses are intended for Miss Rowling's two youngest children David, nine, and his sister Mackenzie, seven

By Keith Gladdis

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When the creator of Harry Potter decides to build an adventure playground for her children, you expect something magical.

But even by JK Rowling's standards the 40ft high, two-storey tree houses planned for the back garden of her Edinburgh  mansion are something spectacular.

The Hogwarts-style towers - estimated to cost around 150,000 - are so big that they need planning permission.

Branching out: A computer simulation of the twin tree houses to be built in JK Rowling's garden, taken from the Edinburgh City Council website

Branching out: A computer simulation of the twin tree houses to be built in JK Rowling's garden, taken from the Edinburgh City Council website

The towers are linked by a rope bridge and can be approached by a secret tunnel hidden underneath a raised wooden walkway.

Extravagant; The towers are linked by a rope bridge and can be approached by a secret tunnel hidden underneath a raised wooden walkway

Each wooden tree house is to be built on stilts and boasts balconies, carvings and turrets that wouldn't look out of place in a Potter adventure.

The towers are linked by a rope bridge and can be approached by a secret tunnel hidden underneath a raised wooden walkway.

Plans lodged with the City of Edinburgh Council reveal the houses are intended for Miss Rowling's two youngest children David, nine, and his sister Mackenzie, seven. 

Children's dream: Each wooden tree house is to be built on stilts and boasts balconies, carvings and turrets that wouldnt look out of place in a Potter adventure

Children's dream: Each wooden tree house is to be built on stilts and boasts balconies, carvings and turrets that wouldn't look out of place in a Potter adventure

Eco conscience: JK Rowlings tree houses will only be built with timber from sustainably managed forests

Eco conscience: JK Rowlings tree houses will only be built with timber from sustainably managed forests

According to the drawings 'David's Tree House' is closest to the secret tunnel and has a specially designed trap door and fireman's pole escape into the garden

Meanwhile 'Kenzie's Tree House' has its own spiral staircase and a stainless steel playground slide leading to a double set of swings.

A wooden walkway connected to the giant structure leads to a giant trampoline deck that is shielded from public view by a row of extra tall conifers.

Impressive: Hogwarts as it appears in the film Harry Potter and the Sorcerer's Stone

Impressive: Hogwarts as it appears in the film Harry Potter and the Sorcerer's Stone

Intricate design: Drawings on Edinburgh Council website for a proposed tree house in the grounds of JK Rowling's Scottish home

Intricate design: Drawings on Edinburgh Council website for a proposed tree house in the grounds of JK Rowling's Scottish home

Bespoke fun: Plans reveal the houses are intended for Miss Rowlings two youngest children David, nine, and his sister Mackenzie, seven

Bespoke fun: Plans reveal the houses are intended for Miss Rowling's two youngest children David, nine, and his sister Mackenzie, seven

The design by the luxury tree house makers Blue Forest UK features cedar shingle roofs and a built in 'nature box' for birds to nest in.

Miss Rowling, 46, lives in her 17th century mansion with her husband Dr Neil Murray, their two young children and her 18-year-old daughter Jessica, from her first marriage

Miss Rowling, 46, lives in her 17th century mansion with her husband Dr Neil Murray, their two young children and her 18-year-old daughter Jessica, from her first marriage

JK Rowling's tree houses will only be built with timber from sustainably managed forests.

Miss Rowling, 46, bought her 17th century mansion for more than 2 million in 2009 when she reportedly fell in love with it after viewing just two of its 31 rooms.

She lives there with her husband Dr Neil Murray, their two young children and her 18-year-old daughter Jessica, from her first marriage.

The property has been dubbed 'Fortress Rowling' by some because of its security fences and reinforced doors.

Giant trees were lifted by crane over the garden walls to give the author and her family more privacy.

Last year JK Rowling got planning permission to flatten a 1 million 1970s style house next door to make her garden larger.

She also got approval to build a summer house that critics said looked like the stone hut inhabited by Hagrid, the giant groundsman from her best-selling novels.

Yesterday a neighbour said: 'Nobody around here is going to make a fuss about the tree houses for her children. It's her cash she can do what she wants with it.

'Miss Rowling has spent a lot of money on trees surrounding her property so even if these tree houses are huge nobody but her is going to see them. In any case she's extremely nice and well-liked around here.'

A source at Edinburgh Council said: 'It would be highly unlikely that JK Rowling will not get permission for these tree houses.

'They are only for her children to play in, she's not seeking permission for residential permission for them.'

JK Rowling is worth around 560 million according to the 2012 Sunday Times Rich List.

She is reported to have given away more than 100 million to charity.

Harry Potter and the Deathly Hallows: Part 2 (2011) with Daniel Radcliffe as Harry Potter. Creator JK Rowling is worth around 560 million according to the 2012 Sunday Times Rich List

Harry Potter and the Deathly Hallows: Part 2 (2011) with Daniel Radcliffe as Harry Potter. Creator JK Rowling is worth around 560 million according to the 2012 Sunday Times Rich List

Blue Forest, based in Tunbridge Wells, Kent, describes itself as the UK's leading tree house architects.

It specialises in creating 'fantasy castles' like those for JK Rowling's children or 'James Bond-style hideaways' with luxuries such as under floor heating, wood burning stoves and plasma screen televisions.

Prices start at 20,000 for its most basic models, but the firm admits the 'sky is the limit' for the final bill when it creates bespoke tree houses for the super-rich.

The firm's managing director Andy Payne said: 'Tree houses have always been a symbol of imagination and creativity.'

Tree houses are generally considered temporary structures and therefore do not need planning permission.

However this only applies if they are less than 13 feet high from roof to base.

Last night a spokesman for JK Rowling said she would not be commenting on the tree houses. She said: 'It is a private matter.'

Here's what other readers have said. Why not add your thoughts, or debate this issue live on our message boards.

The comments below have been moderated in advance.

And meanwhile everyone else's children ave to go all the way to Florida to experience Harry Potter World. WHy on earth did she not insist for the sake of our economy and jobsthat Harry Potter is British and Harry Potter World should be located here!

Awwwwww I want one (19 year old here) :)

Lovely idea.....but when I was a kid, my imagination could conjure up something even more magnificent.....

I wonder if she'll have problems with planning permission - it's irrelevant that "nobody will see them" that would be a license for everyone with an acre or two to build whatever they liked as long as it was out of sight.

That's so cool, lucky kids! It's the value of my house but if I was that rich I would do it, my children would love it so much.

Interesting that the reporter obviously went off to the neighbours trying to dig up some dirt or controversy but didn't find any.

Nice :-)

Just been to Florida and Wizarding world of Harry Potter..WOW is all i can say! Good on her.

I can't beleive a 9 year old boyy would 'play' in one of these tree houses.......

I just had a premonition that a child (likely one of her own but I'm unsure) will tragically die in the playhouses shortly after they're completed and it will cast a shadow of gloom over the residence from that day on. Beware!

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