It shouldn’t do. Most companies will do all the interior work first, and the last job to do will be creating the opening from the house to the conversion. A reputable company will make sure they cause as little disruption as possible during this time.
Cromarty
Cromarty is a town, civil parish and previous royal burgh in Ross and Cromarty, in the Highland area of Scotland. In the 2001 census, it had a population of 719. Cromarty is a sea port on the southern shore of the mouth of Cromarty Firth, 5 miles (8 km) seaward from Invergordon on the contrary coastline. Up until 1890, it was the county town of the former region of Cromartyshire. Cromarty gives its name to among the sea locations of the British Shipping Forecast.