Thinking about adding a dormer window to brighten up your loft space? Whether you’re looking at a simple gable dormer or going all out with an L-shaped conversion, working out the costs can be trickier than figuring out which way your roof slopes! From the type of windows to whether you need scaffolding (spoiler alert: you probably will), there’s quite a bit to factor into your budget.
But don’t worry – we’ve put together this handy calculator to help you work out what you’re looking at cost-wise. Just tell us what kind of dormer you fancy, what material you’d prefer for the windows, and whether you need any extras like planning permission or interior finishing. We’ll crunch the numbers and even give you an idea of how long the work should take. Better than guessing and hoping for the best, right?
Dormer Window Cost Calculator
Get an instant estimate for your dormer window installation
Estimated Total Cost
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Now that you know how much the job should cost, feel free to use our quote system below where you will receive 4 quotes from trusted tradesmen in your area.