Rightmove released a study in 2013 that suggests that real estate buyers consider floor plans not just nice to have, but essential when looking at properties. One in five said they would ignore a property without a floor plan. They also rated floor plans more important than photos and the description of the property. On the flip side, when sellers consider hiring a real estate agent, Rightmove found that 42% wouldn't hire an agent that didn't offer a floor plan. Adding a floor plan to a real estate listing can increase click-throughs from buyers by 52%. You can also use a floor plan to communicate with contractors and vendors about an upcoming remodeling project.
Another way to add depth to the spaces at the front of the house would be to widen the house. The back of the house could be extended all the way along. This would mean that the corridors would need to move as well. It makes better sense to move the front walls either side of the central bay forward. The issue then is what to do about the roof line. The extended sections could be left flat, capped with some sort of dormer. Or the roof could be raised and replaced. I'm not sure if we'll get permission to raise the roofline.