Removing a dormer

Removing a dormer and replacing it with a skylight (Velux) is generally a smaller job than building a new dormer — but it still isn’t a quick “one-day” fix, because it involves structural work, roofing, insulation, and internal finishes. Here’s what to expect for each option you mentioned: 1. Removing the dormer and fitting a Velux Work involved: Stripping roof tiles/slates around the dormer. Removing the dormer structure (walls, roof, windows). Restoring the original roof slope with new rafters, insulation, breathable membrane, and tiles. Cutting the new opening for the Velux and installing it. Internal plasterboarding, plastering, and redecorating. Typical timescale: 1–2 weeks for a small dormer. Ballpark cost: £7K–£12K, depending on roof access, scaffolding, and finishes. 2. Replacing with a wider dormer Work involved: Removing the existing dormer entirely. Extending the roof structure to create a new, wider dormer with new walls, roof, and glazing. Full internal finishing. Planning: May need planning permission if the new dormer changes the roof height or sits forward of the main roof slope; otherwise, it may be permitted development if within GPDO limits. Ballpark cost: £18K–£30K for even a modest dormer enlargement, so £15K budget will be tight. 3. Keeping the dormer but adding a Velux next to it Work involved: Cutting into the roof slope next to the dormer and installing a Velux. Minor internal works to blend it in. Advantages: Cheapest option — typically £2K–£5K. Quicker and less disruption. Gives extra light without major changes. Disadvantage: Aesthetically, you’ll still have the old dormer, and the light direction might differ from the Velux. 💡 With a £15K cap, the most realistic options are: Remove dormer → replace with Velux (and possibly a bigger Velux for more light). Keep dormer → add a Velux next to it for extra brightness. If the dormer is structurally sound and watertight, adding a Velux next to it is the fastest, least risky, and most budget-friendly choice.