Lincolnshire's district authorities are being urged to challenge Government plans for a relaxation of the rules around extensions to homes and businesses.
Government proposals include easing planning rules so that extensions of up to eight metres could be built without planning permission, over a three-year period.
District Councils are being asked by Lincolnshire County Council to follow the lead of Richmond Council and find alternatives to the new policy.
Councillor Eddy Poll, executive member for planning, said: "Not only will these changes inevitably lead to more neighbourly disputes, but there's also a danger that a rash of extensions could increase flood risk in certain areas.
"On top of that, there's undoubtedly going to be an impact on the Lincolnshire landscape.
"Developments of this size have to be carefully considered, balancing the needs of the local community as a whole.
"A free-for-all is not the way to go, and we hope that our district colleagues will do everything they can to stop it from happening."
The Government is currently running a month-long consultation on the proposals across the country.