We are currently investigating the possibility of converting our loft and are looking for some general advice. We want to create an open plan kitchen/living space and so no internal walls would need to be created (aside from a party wall and stair enclosure). I am wondering to what extent I need to involve an architect (aside from having plans drawn up).
Also, would it be more cost effective to use a company that specialises in loft conversions from start to finish or is there any merit in employing the trades separately at each stage of the project. So far I have had rough estimates of anywhere between £20,000 - £40,000 and would welcome any advice.