If you mean the physical buildings - they're numbered from 1 upwards - usually all the odd numbers are on one side of the street, with the evens on the opposite side.
If you mean phone number (since this was asked in the mobile phones section) - UK phone numbers have the format 0xxxx xxxxxx or 0xxx xxx xxxx
Not every house is numbered in the UK. Some properties are named instead of being numbered.
House of Fun
In the UK - dial 1471
In a mobile number, "44" is the country code for the United Kingdom. It is used when dialing UK numbers from abroad, indicating that the call is being routed to the UK. For example, if you see a mobile number starting with +44, it signifies that the number is registered in the UK.
lower house
If you're referring to the UK government - it's the House of Commons and the House of Lords.
Dial 011 44, then the full UK phone number minus its leading zero. For example, UK number 01632 456789 (or +44 1632 456789) is dialled as 011 44 1632 456789.
For a house to be considered huge will depend upon where one is in the world. In the UK, for example, houses tend to be much smaller than in America. A large American house may well be considered huge in the UK. Arguably, a house with more than 5 bedrooms might be getting into huge territory.
3 bedrooms is probably the average for the UK
2 - Beetlebum 1997 and Country House 1995
2 Country House (1995) Beetlebum (1997) Song 2 ended number 2 (ironicly)
The UK Parliament consists of two houses: the House of Commons and the House of Lords. The House of Commons has 650 elected Members of Parliament (MPs), while the House of Lords currently has around 800 members, including life peers, bishops, and hereditary peers. However, the number in the House of Lords can vary as it is not fixed.