A double-storey extension is one of the most effective ways to add significant space to your home – particularly for growing families who need extra bedrooms, a larger kitchen, or a more generous living area without compromising on garden size.

Whether you're extending above an existing garage, building out to the side, or creating a full-width rear addition, two-storey extensions require careful consideration of massing, proportions and how the new spaces relate to the rest of the house.

These projects are especially popular in areas with detached or semi-detached homes, where plot width and access allow for more ambitious layouts. A well-designed double-storey extension can completely transform the way a home functions, adding real value and future flexibility.

Planning permission is usually required for extensions of this scale, and local policies often focus on overlooking, ridge height, and the impact on neighbouring homes. It’s important to demonstrate that proposals are balanced, respectful of context and visually cohesive.

Designing for both floors at once also opens up opportunities to rework the flow of the home – for example, moving the staircase, adding a study or utility room, or bringing in more daylight to the centre of the house.

From early feasibility through to planning applications and technical design, experienced support can help avoid delays and ensure the final result feels like a natural part of the house.