Sell house with annex but no planning permission

[M.Gardner]

Hi,

We would like to sell our house and I was wondering if someone could advise us on what to do.

We extended and transformed an old garden shed into an office/granny flat with electricity, water and heating. We have no planning permission for this.
We live in a conservation area. The old shed was built (and therefore extented) on a listed wall.

In order to sell, should we apply for a planning permission in restrospect or get an indemnity insurance cover? or ... else?
Would a survey done by the buyers pick up on the fact that the annex has no planning permission?

We are first time sellers so appreciate any advice!
Thank you!

[The seller of homes]

I would ask your solicitor and see what he / she says. You need advice from someone who is legally trained rather than a property professional.

It will depend too on what you've done to the old shed to "transform" it. Is it the same shed or did you tear it down and build a bricks and mortar building in its place?

Look up as much planning information on your local area on the internet too.

[M.Gardner]

Thanks for your reply.
The old shed was teared down (it was falling appart). It was replaced by a wood structure (shed like wood structure).
The old shed is on the council boundaries map. However the new annex is bigger.
Thanks for your help! I will contact our sollicitor.