Top 3 Loft Conversion Design Ideas For Extra Room Space A loft conversion is a great way to add new space or extra space like playroom or kitchen store etc. As there is no perfect height provided by the building regulations to create the loft work. It can cost you around 12,000 euros for small projects and 40,000 euros for bigger development work. It depends on what type of loft conversions you opt for. A good quality loft company Purley can add 20 percent value to the house by utilizing the correct loft conversion work - https://www.strictlyloftconversions.co.uk/purley/