Golders Green House.
The owners of this one-off 70s house wished to future proof for their growing family. spb were initially approached to help find the feasible combinations that would allow for at least 2 extra bedrooms, a playroom and larger entertaining spaces. The design evolved over many months and spb secured planning permission (via committee) to extend at the rear over 3 storeys. This created the spaces they required, plus a guest suite and much more storage.
The owners took over the reins and with great skill and vision, and a few minor tweaks to the plan, produced a stunning end product fit for their family for many years to come. More photos of this project can be found here: adambutler.com