Residents of Reston want more input on the future of the large planned community, local leaders said Tuesday, a movement sparked by fears that unchecked redevelopment will reshape the area.

As it now stands, the population of the unincorporated Fairfax County community has little say in what landowners can do with their property. Much of the area, developed as a “planned residential community” or PRC, could be built out to a substantially higher density under the current zoning. That has residents worrying that the ideal vision of Reston they have now could be spoiled — and there is not much they can do about it.