Belgravia House in London by Todhunter Earle. Even though this is a rooftop garden, the design show would be excellent for any long, narrow yard. Great way to break up the space by making different "zones"!
On a tight budget? This has been achieved with a recycled timber, some breeze blocks a lick of paint. The trick to the style is to stick to a limited colour palette which brings harmony - but also a great contrast in the textures of the materials.