Occupied no.  

Vacant yes open all blinds, curtains and turn on all lights. 

If the home is occupied, then I never enter early - unless the client is running late and I just want the owner to know as to not be rude.  If the property is vacant, it is on a case by case basis.  I normally don't like to go into a vacant property by myself - safety issues.

When I arrive 5-10 minutes before the scheduled time,  I often will enter the home to check the "stage", familiarize myself if it is a new listing, be prepared to answer questions and point out the highlights of the property.   Unfortunately, many agents do not coach their sellers on preparation for a showing.

The answer to this question depends on so many other factors that it is impossible for me to answer the questions without being at the home and considering the total situation.

Rarely do we have anyone stay In a home for the showings but if I am early I let the occupants know that I am the one in the parked car outside. If they have already exited or as they are, I enter and turn on lights and get a quick look around. You could always ask them to wait outside if they are truly early.

I never go in without my clients. A) for safety and B) in case they flake out on me..lol    I do not want to be responsible for someone's home until I have to be.   :-)

For me, if the house is vacant I go in to prep the house.  e.g. lights, doors, blinds, etc.  If it's occupied I usually wait in the car or outside....however this can get uncomfortable when it hits 110 degrees in Las Vegas during the summer.

I think it depends on your area.  Like others if Owner is home( which I ask the L/A  when schedule showing)  I will notify them I am here and waiting for my clients( so they can leave)  If  they are not home when I arrive I Knock and wait ,  if no response I will open door and Yell out  Real Estate Agent here to show your home. Wait for a response,.  I do this if I am alone Or If my Buyers  are with me.  I ask my clients to wait outside so  I can check out rooms to make sure is all clear.  When  I enter the home I have my phone on Video showing what I have done.  Once convince is all clear I return to front door and wait for buyers.  Now  why would  I  do this?  I have  had two  incidents at showings.   1)  After  looking at the down stairs and the basement, we headed upstairs and as we got to the master bedroom out walked the seller.

2)  Almost same thing, opened a master closet and inside two kids that where skipping school darted out.

Needless to say  both times  scared myself and my clients.

If the home is vacant I will go on inside and open blinds, turn on lights etc...If owner occupied I wait until the buyer arrives.

If the owner is home I always wait for my clients. When the owner is away or the house is vacant, I enter early to turn on lights, open blinds, unlock doors, etc. to get the home ready for an efficient showing.

I wait until the client gets to the house- it reduces liability. 

If its vacant I go ahead and enter, turn off alarm, turn on lights etc... If it is occupied I wait for the clients

Only on vacant homes. On occupied, if someone is home, I might let them know I'm there and waiting outside for buyers to show up.

I follow John McCormack's protocol.  I don't think it's a good idea to enter before the appointed time.

Out of respect I would not enter a house until my appointed time.

I always always always ring the door bell first.  It's adventageous to be early to turn on lights, close toilets etc.  If you have a special situation where you do not wish anyone to enter, please let them know when they are making the showing appointment or put a note on the door.

I would not enter the home if anyone was home.  But yesterday evening I was showing an occuppied home.  I saw the residents leave.  I knocked, got the key and went in.  The place was nice but dark.  I went around turned on lights and opened blinds.  I have arthrities and if I can avoid it do not like to climb stairs in front of clients.  I go up and look around ahead of them.  Then tell them what is upstairs so they can go see it.  

I will frequently open the house if I know it is vacant. Better to get a heads-up in regard to what we are getting into. I notice things better if I am not trying to carry on a conversation at the same time. If the house is occupied, I would never enter and infringe on the occupant’s privacy while waiting for my client to show up.

If the homeowners are not in the home and there are no agents in the home, I enter to turn on lights.

Alot of great answers here ... there are so many different scenarios and I have on occasion entered a property when I got there early or when I got to the property and was awaiting the buyers to show up.  Gives me an opportunity to open blinds, turn on lights, and familiarize myself with the property. 

If occupied (and seller or tenants are home) no, but otherwise I do to scope it out turn on lights, etc. I do let the seller/tenants know I am there but waiting for my clients

I don't go in early if there is someone home. If the house is vacant, I will go in early.

If the home is vacant, or if the Seller has areay left, I would enter to turn ights on, but if the seller is there, I would wait.

If I get there a lot early, I check my emails. If I get there just a bit early, I go in to make sure it's safe.

I always wait outside, vacant and occupied . . . I wait.  First off, our Supra lock boxes record the time of entry and if my clients are there and we enter together they can cooberate the time we set foot inside.  Second, in a vacant property I'm not going to enter alone, and ditto what I wrote.

I have no problem entering early as many an agent and Seller make the home less than attractive for showing. Seller's usually leave before a showing so I come in early, check for shades drawn, smells, heat to high--too low, any number of showing mistakes. I can then meet the client at the door and set the showing's expectations to reflect what I've just witnessed in the house!

Many interesting comments that seem to agree with your protocol. I personally try to drill down to what my clients want in a property including the physical appearance of the neighborhood and wait for their arrival and discuss any relative issues or concerns before entering the house.

If I have made an appointment time  and arrive early to a home that is occupied but on a lockbox and been told the seller would be gone, I will wait in my car or walk to the front patio and wait for my client.  

If I know I will be meeting another agent there, I might knock/ring bell and let the agent know I have arrived and am waiting for my clients.  I prefer to greet my buyers/clients first before bringing them to the door.  However, since we are in the sunny and generally hot Florida, many agents offer to have me step in, which is nice but I still prefer to wait outside to greet them first.

I think this eliminates the awkwardness of trying to make idle conversation with another agent or being bombarded with questions about my clients before we even have a chance to view the property.

Yes when it is vacant I open the door after opening the box and get it ready for my clients. If it is by open house or appointment, I wait outside in my car until my clients pull up.

I agree with John McCormack. If it's vacant, but not with sellers inside. But I must say, I'm rarely at homes where the owners stay during showings. 

Only on vacant homes.  To open blinds, storm shuttters, turn on lights, etc.  Never on occupied homes.

If there is no one home I will go in early and make sure lights are on...but if someone is home, I will wait for my clinets and also the showing time.

If I am early and the house is vacant I will also turn on lights etc and preview if not familiar with. If occuppied I will wait in my vehicle until the client arrives and we will go in at the appointed time.

Only if vacant and only if it is my scheduled appointment time.

Absolutly, I go in, turn on lights, open doors, make sure there are no dead bodies anywhere..... 

I would suggest a note in the private remarks to instruct agents not to go in early with your special case. Because on a normal basis it would be perfectly fine, at least in our area. 

Lyn - It looks like every agent here agrees with you! I think Sharon was right - you should ask them to wait outside. 

I always try and show up early if possible in order to see the goods and bads of the home.

Lyn, whether the home is vacant or occupied, I wait for my clients to arrive before entering the home. This is especially annoying if the home is occupied.

I don't enter until my appointment time. But if I have finished checking my email, text, and voice mail I will go inside.

If a home is vacant I will open up and get lights on prior to buyers arrival. I never approach a home if it is occupied prior to my buyers arrival as that would be rude and wasteful of homeowner's time.

If the home is occupied I might let the sellers know I am there and waiting on my clients outside. If vacant, I go inside, turn on lights and open blinds. I may go back outside to wait for clients but at least I know what the inside looks like already when my clients arrive and I am ready to point out potential issues or concerns as soon as they walk in. Each situation varies

I always wait on the buyer to enter the home.  If the home is occupied, I feel that it reduces liability.  If the home is vacant, it can be a safety issue to go in some vacant homes by yourself.

If the home is occupied, I wait. If it's vacant, I enter to get everything set up (turn on lights, open doors, close toilet lids, etc.

If it is vacant, I will sometimes go in but many times I wait in the truck, multitasking until the clients make an appearance.

If vacant, yes, and I would turn on lights and look around to get an idea of the layout.  However, if someone is there and my client said they are running late or will be there in minutes, I would ring the bell and let the person know.  However, I would return to my car or be outside until my client comes.

I do not see anything wrong if you ask the agent(s) to wait outside until their client comes.  You don't need to entertain an agent.

I enter vacant homes if I arrive early, not occupied!

Only if it's vacant

If I arrive early I do like to go in and turn on lights and get familiar with the property so I can make the buyers feel at ease.

If vacant, I scout the house and get it ready without the clients. Then I go outside and wait for the clients. When occupied, I show up at the appointed time then enter the house with my clients once the occupants leave after I have told them that I am there.

I operate the same way you do.  Waiting inside might be dangerous, too.  I wait outside for my clients.  The minute they pull up, I pop out and open the lockbox so they don't wait on me if it's summertime.  Otherwise, I don't enter. 

Like everyone else here, I have just gotten into the habit of waiting for my client and then go inside if the home is occupied. When it's vacant, I always go in and check it out before the clients arrive if possible.

Waiting for the supra box that will not let you in, if it is not during your showing block: )

I too wait for the buyer almost always if the hone is presumed vacant or occupied.

When I know the Seller is home I knock on the door, introduce myself, and inform them I will wait outside until the Buyer gets there.  I had Sellers to leave, and lock the door behind them when I've been sitting in the car in front of their home.

This story also reminds me of a Seller years ago who walked up one side of me, and down the other because I was a half hour early.  "He told me he had a standing appointment with his spouse every week at around this time, and because of me he did not finish."

I always arrive early and open the home.  I walk through the home just encase the buyers have a question.

I would enter the home and turn on lights if they were not on already, as well as to get the layout of the home.

I always ring the doorbell first. 99% of the time, sellers are already gone from the house when I arrive, so I don't worry about waiting for my clients inside under those circumstances.

all good answers. Make your best choice.