By about 1790 verandas made of ironwork had become a regular addition at the back of houses.
These were a Regency development. In 1816 Loudon patented a curved cast iron glazing bar for greenhouse use. Metal-framed glass houses with semi-circular roofs to allow more light became possible and were enthusiastically taken up.
By 1810 lawns had become popular. Edwin Budding invented the modern cylinder lawnmower in 1830, but it was about 1850 before it came into general use.
Hard surfaces were more popular than grass. Areas were often paved with flagstones. Or there were paths made of gravel or coal ash. There might be urns or statues decorating the hard surface.
Flowerbeds were often made into interesting shapes, rather than left with straight edges.