Hi as per the title we are in the early stages of purchasing a property that has a barn as a continuation of the house (same wall and roof line). The current owner has laid a new concrete floor complete with provision for services , moved the kitchen into part of the barn area (all completed and looks like part of the house). They also have built some small blockwork rooms to house the boiler and for storage and has replaced the barn doors for new doors and windows. I assumed they would have had CU for this as they told me they were planning to make this a large living room , but when I asked we were told the following "Permissions wise, I spoke to the marie when we started the renovations and there is no need for a CU, as the buildings are attached. You will have to declare them as an annex/ habitable space on a tax form though and your taxes will increase a bit (you pay more for habitable space and extra bathrooms!). None of the openings have been changed though, so no permissions as such are required. If you want to put in velux though, for example, you will need to fill in a 'declaration prealable' which takes 30 days from submission for permission to be granted." Does this sound correct