I live in a new build, under two years old. I'm about to convert part of my integral garage to habital use.
I firstly enquired with the developer if they had objections, re their covenants. They did not have any objections. I then sort pre planning advice on the
https://www.planningportal.co.uk/info/200232/planning_applications/59/how_to_apply, which suggested planning approval was required in my case.
My LBC stated, as permitted developments were removed, from the original planning approval for the development I'm on, I had to submit a planning application.
I had some comments made by one of the Consultee's, Town Council, which referred back to the original planning approval, which stated garages should be used for parking of vehicles only, pedal cycle storage provision (in the garage) and off road parking provision.
Highways had no objection re off road parking, my drive can accommodate for the same amount of vehicles with conversion of the garage. I can accommodate 4 pedal cycles (for 4 bed detached) in the unconverted part of the garage. And as a garage door will remain, my property's appearance will remain the same from the road way. Not sure why the objection of using the garage for parking of vehicles only was rejected, perhaps because highways had no safety objections.
I now have to apply for Building Regs approval. Hope this helps.