New rules are being brought in to stop traditional slate rooves and chimneys being removed from houses in Stamford, in a bid to protect the look of the town.
South Kesteven District Council approved changes last night - meaning even all changes to buildings in the area will need to be rubber stamped by planners in future.
Builders will also be encouraged to use traditional materials and techniques.
If successful, councillors say they'd look to bring in restrictions in surrounding villages as well.
The town hosts England's first Conservation Area - introduced in 1967.