Constant interruptions driving me mad, wwyd?

[Snorkers]

Dh and I are renting a place temporarily while we wait for a house purchase to go through. Holiday cottage on owners land sort of thing.
the problem is the owner is constantly knocking on the door for one reason or another, I work at home and am constantly being interrupted whether it's about fixing something, asking about little repairs that need doing, asking for my professional opinion on something he is also involved in, trying to get me do do bits and bobs as a favour, moving my car, general chitchat etc. Then at the weekend our peace and quiet is interrupted when dh and I just want to relax together.
How would you diplomatically tell him to rack off? Clearly for something urgent or an emergency I'd be available but it's starting to affect my concentration and work performance, not to mention being stressed and on edge waiting for the next interruptions. I really feel like I have no privacy.
Last weekend we came back from the shops and he'd let himself in to our place to sort some issues out with the meter, no notice given what soever.

I'd stop answering the door. I would honestly. Just don't go to the door.

People like this are weird. I had a neighbour like this...she was a lone parent and quite young and she took to hassling me multiple times per day because she was lonely really...and saw me as a Mother figure.

In the end I stopped answering the door because she'd not taken it on board when I told her to stop.

He should NOT be letting himself in though. I only just saw that...I would be moving out.

It's not worth the bother for a short term let!

Did you say anything about that?

You know you can change the lock, right? £7 to change the barrel, depending on the lock. You just change it back when you leave.

Stop answering the door, or open it a crack, tell him you’re mid something work, can’t talk now, don’t get back to him. He sounds like a total pita. If he lonely, whatever, it’s not your problem. He must not let himself in, that is breaking the tenancy agreement which offers you peace and quiet enjoyment of the property. If you’re feeling brave, quote this at him! Tell him you feel harassed. You don’t need his approval and presumably you’re moving out soon?

Agree with @FortunesFave.

Letting himself in is not ok at all. I assume the hassle of moving wouldn't be worth it, so I think you need to act as if he's a randomer who's walked in off the street into your office.

You need to be obviously busy with work that can't be interrupted. Sign on the door saying 'please leave deliveries at the door and do not knock'. Bolt across the door if possible. If the landlord knocks ignore him. If he walks in, jump up and say 'I'm on a conference call'. If he wants to come in 'but I am at work from 9-5 and very busy at the weekends'.

Thanks all. I've put a sign up saying please do not disturb, leave parcels at the door
it'sa very iinformal arrangement, no tenancy agreement. If he comes in again will say something. He's just going to collar me when I go to my car now though!

If you have no tenancy agreement then change the lock. If he says "Oi you've changed the lock!"

Fix him with a deadly stare and say "And why on earth were you trying to get into my home?"

What an arsehole!