The mayor can expand his perimeter over a house which he do not have the writ for. This serves as a warning for a deed expansion and gives the owner of the house time to move. Only the perimeter can be expanded over a house - the mayor has to have the writ in his/her inventory to expand the deed over the house.
The money needed for the resize seems to resize must be either on currently take from the upkeep, and then from the person resizing or in their players own bankaccount.
'''Warning:''' At the question concerning hiring of a spirit Templar (or guards), if you leave it as 0 the resized deed will have no templar even if you originally had one (or more). <u>Always fill this in with the number of Templars you want on your resized deed.</u>