foss99   10 #13 Posted February 25 According to https://loftconversionsheffield.co.uk/loft-conversion-sheffield-cost/ it costs anywhere between £20k-50k or more, it depends on whether you are going for velux windows style in the roof or if you are building extra structure to make it go out like a dormer, which increases the cost. Share this post Link to post Share on other sites Share this content via...