Unlocking daylight on deep, restricted urban plots is one of the most common challenges in London residential architecture. When expanding an end-of-terrace property, the balance between maximising internal floor area and preserving natural light requires a tailored structural response rather than an off-the-shelf extension.

At Clay House, our recently completed residential transformation in East London, we faced a classic urban puzzle: a sharp, tapered boundary line further complicated by an unmovable garden manhole right in the build zone.