Hi we want to get a bedroom en-suite loft extension. There are others on the street but no-one I want to approach for info (they both have family in the property business and I don't want to feel obligated to get a quote from them etc). We have had a ball park quote from a building firm who has worked on our roof as a starting point ( and will get others) but have been told no detailed quotes until we have architects drawings. I have looked at a few local firms but want to make sure we are in a position to proceed before calling and websites don't give any idea of costs. What am I looking at? £300/ £500/ £1000? We are based in the North West....