There is no average. Being in the lawn care business I see suburb lawns everyday.
I've seen mansions with only a 4000 sq ft lawn. I've seen small bungalows with 3 acres.
I suppose I could go out on a limb and say many of them are about 15,000 sq ft...usually with about 5000 in the front and 10,000 in the back. So - you needed to know this because......?
8 billion square feet
Fukushima is not a suburb. Fukushima is the name of a prefecture, which is a large district. It is also the name of a large city within that prefecture.
suburb.
A suburb
Johnsonville.
Birmingham, is a suburb of Erdington. Erdington is located in the United Kingdom and has a population of 23,853, according to a census conducted in 2001.
lawn mover
A suburb, a bedroom community or perhaps a neighborhood.
Peppermint Grove is considered the most expensive suburb and is located in Perth. The average property there is worth over $3 million.
Dagenham is a large suburb of east London it has been built over centuries.
Forest Lawn Memorial Park is a cemetery located in Glendale, California. Glendale is a suburb in the Greater Los Angeles area. Many famous people are buried at Forest Lawn Memorial Park.
Human geography
Suburbs are near a large city, but towns tend to be more isolated.