Do you walk into a house without knocking?

Are these houses just unlocked that anybody can walk in? A foreign concept to me.

At my mother in law's yes. At my mom's, no, but only because she has the place locked up like Fort Knox and it faster to just knock and wait. At ds', yes.
We dont really show up unannounced at any of those places though

Everybody just walks into my sister's house either expected or unexpected. I have the code to her keyless entry so I just walk in. I also help myself to wine. It's very casual down here but hers is really the only house I wouldn't knock at.

At my parent's apartment, I usually knock and let myself in with my key. They are both on walkers and it's hard for them to make it to the door so I save them the effort.

No.

The only house I ever walked into without knocking was my grandmother's, when she couldn't get up to answer the door, and I had a key. I would still ring her up to let her know I was coming, then call out from the front door as I opened it so that she would know I was there.

Even if I have just called them from the front drive to say I'm here (pre-arranged) I'll still knock/ring the bell.

Earlier this week I went to an invited gathering at the Rectory. The door was unlocked but nobody just walked in. Everybody rang the bell. It's just something that we do here in the UK.

Never, even when the kids say "you don't have to knock", I say, sorry, it makes me uncomfortable to just walk in without knocking.

Unlocked doors are still relatively normal here and people do just come in. I will go into my son's house without knocking but I'll shout that I'm there so as not to startle anyone. Likewise he or his family will just turn up and come in here. Workmen do that too, although it is becoming less common. I don't mean workmen who are in the middle of a job but someone who has said he'll pop round sometime to give a quote or similar. My doors are only locked after dark or if we are away. It would be totally different if we lived in a city but even in the town people have their doors unlocked.

No and I wouldn't want anyone doing that to me either.

Never. I don’t like it when people show up unexpected to my house so I always call first and then knock or ring the bell when I go to someone else’s house. My own house is always locked up even when we’re home. When my mom was alive and still living at home, I would let myself in with my key but she would always know I was coming and was expecting me.

On a related note, it would drive my DH absolutely INSANE when my siblings would show up and while visiting just help themselves to whatever was in the fridge, cabinets or out on the counter. To me it was no big thing and I totally didn’t care but he really thought it was rude for someone to just go rooting around for a snack, LOL. It’s totally the difference between growing up with seven siblings vs. growing up with one, we just automatically shared everything.

When I was a kid, we never had a lot of store bought treats and those things were rationed like gold, LOL. Once, a bunch of popsicles went missing and the tipoff that it wasn’t one of us was the small muddy footprints that led from the back door to the refrigerator. Turned out the little neighbor kid came over on her own while we were all out doing something out front and she just helped herself!

Every door in my house is locked at all times, so no one is walking in here unannounced! And that is the case with pretty much everyone I know. Always assumed those scenes were just something that happened on tv, but not in real life.

I would not. Almost everyone I know, keeps their doors locked at all times.

I never leave my door unlocked, so anyone that wanted to enter, would have to knock.

In addition to keeping the door locked for safety reasons, no one needs to see me bra-less. 

I do not. When we would visit mil we had keys, but always knocked, just so that we didn't startle her. As for the kitchen, that was different and we could make ourselves at home. When sil visits us she comes and goes as she pleases and the kitchen is her domain. She makes her coffee and grabs her snacks or tea at will. If anyone else did that I'd be very shocked.

Yes I walk in to my mom, sister's, SIL's, used to to my inlaws and grandparents. I have a friend how does a knock and walk, knocks but comes in. If I'm expected and invited I just walk in. If I'm popping in I knock and walk. I would help myself to a drink, usually water without asking.

My parents and MIL will walk in here without knocking, as will some of my kids' friends. DH & I both have a sibling living nearby, and they will both do the knock and enter, without waiting for a response.

We used to keep our front door locked at our last house because we couldn't see the front door, from anywhere in the house, plus we did not have a storm door there. We did keep out back screen doors open during the day, and people who knew us well knew they could come to the back deck and come in if they wished.

But now, we can see some combo of the front walk, back walk, driveway, and ground floor exterior doors from numerous spots in the house, AND each door has a storm/screen door, so we keep all of the doors open until the weather gets too chilly to do so. But even when it is cold, after the first person leaves for the day, the back door will be unlocked if anyone else is still home, and that's where any drop-in guests will enter the house. We can see people approaching that door from every room on the first floor, so it's very unlikely that someone will enter the house without us being aware that they are here first.