Hello. Yesterday, I purchased Hearthfire from Steam. I managed to purchase some land in The Pale, I went to my plot, did everything nessecary to build the small starting house, but I cannot see it anywhere. Please help!

Uninstall Mod "Birds and Flocks" it's common error. Hope i helped.

Ah thanks mate, I'll give it a shot

Turns out I diddn't have that mod. I uninstalled Birds of Skyrim and Realistic animals and preditors instead, but still no house.

You will have to just go through your mods disabling them to see which one it is then, there will be at least one of them that is not compatible with the DLC.