The planning board has been tossing this idea around for over a year as they discuss making an amendment to Chapter 152, Article 4 of the zoning code. This deals with the size (or bulk) or residential homes.
Discussions are focused on limiting the height of buildings on lots less than 10,000 square feet to 25 feet. For lots in the R10 zoning there will be an additional requirement of making sure the floor to area ration is limited to 0.5. The reason this will only apply to R10 lots is because the setbacks in the other zones will limit the size of those homes.
Members of the board and community members are concerned that if the zoning remains unchanged it allow people to push the limits of homes to create McMansions, therefor losing some of the character and charm of the town.