When I was writing my business plan for domestic cleaning company I had to specify who my customers were going to be and explain why.
I went to our central library and they gave me some demographic info who and were live in the city. That info classified areas by type of residents, for example this area occupied manly by professionals or unemployed etc., average income could vary from this to this etc.
:

That was more than 6 years ago.
thanks for your votes, Author where do females mid aged with college or university education hang out?
...But they are right in what they say about the midle aged Women that is content, They always make the best customers, trouble is finding them...
Today you can do such search from your desktop:
1. Go to
www.upmystreet.co.uk 2. Then look on the left side of the page where there is "Local area" and click on "My neighbours".
3. Type in a post code (it would give you a more specific respond) of the area you would like to learn about
4. See what kind of people live there.
Hope this helps

Regards,
Arthur