The3rd Earl Of Derby wrote:

You could try this...problem is most of the answers you might not
know?

I tried it and the house I'm in is almost to the date it gave me, due
to not knowing some of the questions.

http://www.bricksandbrass.co.uk/houseage/ageform.htm

I tried this again using answers(not all filled?) from a property I used to
live in some time ago which was Victorian, I knew the age of this house
because it had the date above the door in the stonework.
The site was accurate to within 4 years of its age.

--
Sir Benjamin Middlethwaite