Is planning permission to convert attic to an official bedroom worth it for resale?

When you go to sell you will have to provide the planning permission. No permission no sale.

I'm reading the post as he intends to remove the hipped end of the roof and replace it with a gable wall so PP would be required. Maybe the OP would clarify.

Thank you for ignoring my question.

For what its worth, it depends on the neighbourhood.

I lived in an estate of bungalows in Dublin where nearly all were converted up stairs but didn't meet the head room criteria.

I converted mine and sold it with two lots of ensuite storage: competing bidders brought it to 15% over what I expected

If the job you want to do can be done in compliance with planning and building regulations it is most likely wisest to do it that way.

Some "upgrades" to houses can devalue them as intending purchasers see a problem to be sorted out rather than an addition.

There may also be difficulties with mortgage approval if there is unauthorised development.
When there is a scarcity of property on the market planning indiscretions may be overlooked but in a recession they can assume major importance.

That would not require planning. But OP was converting a hip roof to a gable so their conversion would require planning.

I’d also query the “full cert of compliance”. The engineer and builder will only be certifying the work they do. That doesn’t mean it’s a fully compliant conversion. Is it a two story house?

However, when you come to sell the house, you cannot call this attic space a “bedroom”, it will still be legally considered as storage, even if you’ve been sleeping there for ten years. This is what most attic conversions involve.

He can call it a bedroom if it meets regulations. This implies that it cannot meet the requirements, which is incorrect.

If we put a dormer in to the back and front or only the back, would the space be legally a bedroom as opposed to a storage space? I realise we would need PP to do this.

Sorry I thought you were the OP.

so this is a list of what’s included.
It doesn’t say fire rated doors but I will ask this:

• Structural steel (RSJ)
• Top hung velux window (fire escape)
• Floor joist 7″X2″ timber fully suspended off steel (RSJ)
• Fully floored with OSB flooring boards
• Storage fully floored with two access doors
• Water tank moved in storage with access door
• Stud walls 4″x 2″ fully suspended from steel (RSJ)
• Staircase fitted 30″ wide to meet the regulation with handrail
• Stud wall at top of stairs with fire door
• Fully insulated
• 800ml double radiator
• Electrics- 4 double sockets, 5 led spot lights, 2 way switching and smoke head, all wired directly back to fuse board on its own circuit
• Ceiling area ccross battened and collar ties fitted
• 1/2 plaster board fitted on ceiling and walls
• Skim coat finish on all walls and ceiling
• Attic left ready for painting
• All rubbish removed from site
• Final clean up upon completion of work
• Certificate of compliance upon completion of work from engineer, stating all work is compliant with building regulations

Nothing in the first post excluded the conversion from being compliant. Number of stories in the existing house wasn’t even mention.

Assuming it won't be compliant, even if that assumption is correct, is no help to the poster as they've no idea what the issue it. Much better to confirm, and provide actually usable information - obviously this requires knowing the regs and not just blanket statements.