The CBO 500 pizza oven kit from Chicago Brick Oven is a great choice for layouts that require a smaller footprint.
It provides an authentic wood-fired cooking experience in a simple, value driven package. Includes everything you need to assemble and fire up your oven: 5-piece oven (refractory dome, 2-piece hearth, arch, decorative door), install kit (anchor plate, insulating board and blanket, steel plate, mortar), as well as accessories such as a pizza peel, brush and infrared thermometer gun. Installation is straight forward, but some hardscaping experience is required. Just choose your own facing material to match your decor and you're on your way. Hearth space is 27" x 22". (Vent pipe and terminator cap are excluded.) Shipping is FREE (contiguous US only).
To see how to install a pizza oven outside, watch this time lapse video here.