Top tip FWIW, if you really dont want to *iss off an electrician dont do the following:
1. Decide on outside lights / water feature / Summerhouse, after drives have been laid, plastering has been finished etc
2. In other words if you need extra ccts internally after plastering or externally after concrete / tarmac has been laid - expect the worst.
3. Dont change your mind on recessed lighting after its been installed, do your research
4. Dont have all the sockets fitted and then rock up with fitted furniture which covers half of them up, design your fitted furniture before letting the electrician loose.
5. Make sure the electrician is aware of ALL electrical devices that are to be installed, e.g. if you have under floor heating wet or dry make sure the electrician is aware
6. Tell the electrician of the kitchen and bathroom designs they are not Psychic..
I could go one but generally if the client is making requirements on the fly, it will end in tears. Ditto for other trades like kitchen and bathrooms and heating / ventilation and A/c
AND BREATHE