Formal:
* Maligayang pagdating sa aming tahanan. (This is the most direct and formal translation)
* Pasasalamatan namin ang inyong pagdating sa aming tahanan. (This adds a sense of gratitude)
Informal:
* Maligayang pagdating sa bahay namin. (This is more casual and friendly)
* Welcome ka sa bahay namin. (This is a direct translation of "Welcome to our house")
* Pumasok ka na sa bahay namin. (This means "Come in to our house")
More Specific:
* If you want to emphasize that they are free to come and go as they please, you could say: Malaya kang pumasok at lumabas sa bahay namin. (You are free to enter and leave our house.)
* If you want to emphasize that they are always welcome, you could say: Anumang oras ay maligayang pagdating ka sa bahay namin. (You are always welcome to our house.)
The best translation will depend on the specific situation and the relationship you have with the person you are speaking to.