Piltown in South Kilkenny has been designated as a rent pressure zone.
It's just one of four new local electoral areas that have been included.
Rents in Piltown, Baltinglass in Wicklow, Sligo-Strandhill and Cobh in Cork will only be able to go up by 4% a year.
It brings to 25 the number of areas brought under RPZ rules this year.
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Meanwhile, the latest figures from the Residential Tenancies Board shows national rents increased by 8.2 percent this year.
