Residents fear being priced out of a Suffolk town due to the construction of a nuclear power plant, with the rent on some homes doubling to more than £3,000 a month.
A final investment decision on Sizewell C is expected within months and groundwork is already under way.
Its construction is predicted to require a workforce of 7,900 people, with about two thirds moving from outside the area, and some people in nearby Leiston have claimed "landlords are cashing in" by raising rents.
Linda Druce, director and founder of Druce Estate & Letting Agents, said: "I have been in the area for 21 years now and this is the first time we have seen such a significant jump, particularly in rental prices."