Cheers for the advice .
As for the neighbours , thats no problem , most have been asked , and no problems there .
As for the extensions on the neighbours houses ,,they where mostly done years ago, and most have had new owners since ,so I guess the plans may have long gone.
But my adjoining driveway neighbour has a exact extension to what I am looking for ,,so be good to use that I guess for measurements etc.
Trouble is I bought my house from a old person who never modernised, where as all the others have been.
Si