80 % of a loft conversion can be completed from the roof access until the staircase is installed. A lot less disruptive then you think.
This is a very simple document that can be downloaded or we can provided for you. Some neighbours may want to involve surveyor.
Planning permission is usually needed with front elevations or the proposed loft exceeds 50 cubic meters. Most conversions can now be achieved with permitted development.
We have a in house architect who deals with all our drawings, another thing you dont have to worry about.