From what I've seen many neighbours don't think working on road going cars objectionable - even as a business.
But - mate has been refurbishing a house in his spare time; working from the garage at the house for 8 hours on a Saturday, 4 or 5 hours on a Sunday and in the summer a couple of hours or so 2 or 3 evenings a week. It has all been going well until August this year when new people moved into the road.
Since then he's had letters, visits from police and council following up complaints of noise, him running a business from there and not paying business rates. Only this month has he been informed of the originators of the complaints - the new neighbours.
It now seems unlikely he will be able to finish the house in his planned timescale.