accommodation angles architecture box-like boxed bricks brickwork building building-construction building-site building-work buildings concrete concreting construction development distinctive elements exterior external gray grey height high home house light linear lines modern modernistic perspectives plain second-storey second-story squared straight structured style suburban two-storey two-story units urban views wall walls windows work abstract angled apartments backgrounds chinese city clear colors colours contrast covered curved diagonal edge edges flats heights homes houses overlap overlapping patterns placement roof roofing roofs rooftops rooves rounded rows shape shapes Singapore steep streets surfaces texture textures tiles tiling appearances contemporary contrasting cool courtyard dark decorated Designs flowers gardens greenery levels plants shade shadows shelter sheltered Sizes structures styles tree variety