Welcome to the community.
An interesting question and one I was considering as we have work to do on our home.
I think that the principals that you need to be mindful of are:
- Are any of you at risk, such as immuno-compromised, aged, etc?
- Maintaining non-contact social seperation.
In my non-professional opinion - if any of you are at risk, then don’t get tradesmen in unless it is absolutely critical. If you aren’t at risk, then you can consider having them there, as long as everyone adheres to the seperation guidelines. And then if at all possible clean off every surface that they have touched that you may touch.