The impact that 10,000 new homes south of Carlisle will have on the landscape has not been considered, according to the group the Friends of the Lake District.
The organisation, which also represents the Campaign to Protect Rural England in Cumbria, says there's not enough information about the impact on the environment or to support the need for the development, or the link road that will be built to serve it.
The planning officer at the charity, Lorayne Woodend Wall, said:“People have been in touch with us about both of these significant developments."
The group is holding a meeting at 16:30 in the Old Fire Station in Carlisle to discuss the proposals.
Friends of the Lake District is not anti-development and we support the concept of one or more modest size new villages of the right design in the most sustainable locations.”