I changed the inner door to the outer door. Do I need to talk to a carpenter or a mason?

You need to contact the property first, and then discuss with the decoration master after you agree.

The national fire technical standard does not stipulate the opening direction of residential entrance doors, but only stipulates that the safety exit doors of business premises should be opened in the evacuation direction, which is usually called outward opening. For residential buildings, if the entrance door opens outward, it will usually reduce the effective width of the evacuation passage and affect the use of indoor fire hydrants, which should not be advocated. In the process of use, the entrance door shall not endanger public safety or hinder the passage of neighbors. At the time of design, all the entrance doors of the owner's house are designed to open inside. After the owner closes the house, it should not be opened to the outside world without authorization. Relevant departments have the right to require the owners who have changed the doors to the outside to carry out rectification.

Note: Under the premise of completely opening the door, it will not affect the neighbors to walk back and forth, and ensure that there will be no fighting with the neighbors' entrance doors. Does not affect the evacuation of walkways and landing. The entrance door of some houses faces the stairs, and meeting outside will hinder the smooth flow of stairs and walkways, so it is definitely not allowed to change outside. Many newly-built residential areas open doors from the inside, because from the perspective of safety and standardization, opening doors from the inside is more advantageous, and it will not affect people outside because of the sudden opening of doors, and opening doors from the inside can also block some privacy, especially for units without entrances, so as not to see the whole living room at a glance.