A standard Velux or rooflight attic conversion typically takes between 4 to 6 weeks to complete, while a larger structural dormer or hip-to-gable conversion usually takes between 6 to 9 weeks. Because Alltrades Builders manages the entire project from architectural 3D designs to final structural sign-off, we keep building teams tightly on schedule, minimising any handover delays and ensuring your home remains watertight throughout the process.