it depends what goose neck you have , we used the standard ionics goose neck and stood off the pavement by a couple of feet for the top floor only,
round the back your working off a flat roof which changes in height and has a couple of court yards
the windows they are fussy about are the ground floor ones, did you notice the flower pots on every window sill, there not very quick at moving them, i would ask them 1st thing to move them.
it think it was 2006 i done the job,so there might be different management there now
on the front i had the use of 35 ft and 60ft poles and if i remember right the top 2 floors were 60ft