Leveling garden to reduce step out of the house.

Hi,you could Can rise the garden near the house just be sure you don’t go above the damp proof or you could start having problems with damp In the house

You can’t raise the level next to the house any higher than the dpc height or you would get dampness in the house

Nor above dpc, as the other answers

They're is a lot of opinions on this according to building control all patios should be 150mm 2 bricks below door threshold, most new build houses with bifold doors are laid level with door threshold to continue tile look ,but leave 100mm of pea shingle against the rest of the property as a french drain is the terminology. I take it I will not be higher than the door or you wont be able to get out .