What Article 4 means for the front of your house
This is the part of Islington’s regime that catches owners mid-project, because it applies to work most people would never think of as development. Across 40 of the borough’s 42 conservation areas, the permitted development rights that would ordinarily allow you to replace external doors and windows, or paint previously unpainted brickwork, have been removed. The reasoning is straightforward: on a terrace built to one pattern, the front elevations read as a single composition, and each individually minor substitution — a uPVC window in place of a timber sash, a modern door in a Victorian opening, one painted house in a run of stock brick — is corrosive to the whole in a way no single owner intends. The practical consequences are worth knowing before you order anything. Replacement windows need permission and are assessed on pattern, material, glazing bar arrangement and how far the frame sits back from the brick face; slim-profile double glazing in timber sashes matching the original is usually the specification that satisfies both the designation and the building regulations. Painting the brickwork is very unlikely to be supported. Repair of original joinery, where the fabric allows it, needs no permission at all and is frequently cheaper over the life of the building than replacement. Planning that sequence at the start avoids ordering windows you cannot install.