I had the same problum, When I retired I moved to a Bungelow with a small garden, I put up a shed 12'X8'X 6.5 hight. then I was told that I was NOT to keep Chickens or Pigeons on my propety. So I started a dove release busness for weddings ect: I got some pure white Racing pigeon & told the neighbours that they were Doves! & invited my next door neighours in to look at them. they said how beautiful they are, I have had them now for 5 years, & how wonderful they looked when they were flying around the house's, I started to race once more this season & bought in some coloured racers mixed with my whites. with no objection from the neighbours, One did say he had noticed I had some coloured pigeons flying white the whites. I told him the truth I was stated to race them I told him how we as pigeon fliers treat & look after our birds. & he has seen how clean I keep my loft, he never realised what we had to do to keep our pigeons in tip top condition. All seem well now.
Next week I hope to put a 6'x4' shed to house my young birds for 2010 season :X