The house number is greater than 400 and less than 500. When you add 6 to the house number, the result ends in 0. The sum of the digits in the house is 13.

The last number needs to be 4, because when you add 6 it ends in 0 and 6+4 = 10

The first number is also 4 since it has to be between 400 and 500.

The sum of the numbers is 13, so the middle number would be 13-4-4 = 5.

The house number is 454