A Clever Home Design for a Narrow Block. Metro 31 Dec 02, 2016 by Metricon Add to lookbook Pin it! If you’re looking to build a new home in an inner city location where a car park space is now a commodity, the Metro 31 has been designed with a narrow block in mind. Clever design elements create a spacious contemporary home ideal for working professionals or families who love the cosmopolitan vibe of city living. Whilst inner city blocks tend not to offer the space of outer suburbs, a small lot doesn’t mean you have to sacrifice on living space.