· Brent Wilson's Answer
· Needlepoint holly typically grow to about 10 feet or so in height. If your goal is to keep them pruned at a much lower height than this you might want to consider removing them and replanting with a lower growing shrub.
If the height of the holly are okay, but you only need to prune them to paint the house, you might try wrapping a rope(s) or heavy net around the shrubs and cinch them up to provide space for painting. Otherwise, as John mentioned, heavy pruning during the active growth season could cause serious damage or death to the plants.)