Legislation that will introduce significant changes to the rental market is due to be voted on by TDs tonight.
Sinn Féin has criticised the Government for "pushing through" the final stages of the Residential Tenancies Bill before it goes to the Seanad.
Five hours have been set aside to debate the legislation in the Dáil.
Sinn Féin attacked a provision in the proposed law which says that from 1 March, landlords whose properties become vacant will be able to reset rents to market rates.
There will be no changes for existing leases.
But new tenancies after 1 March will be subject to a minimum duration of six years in an effort to give tenants more security of tenure.
According to the Department of Housing: "Landlords will only be able to end the tenancy in specific situations, such as the tenant is not meeting their obligations or the property no longer suits the tenant's needs.
Smaller landlords, defined as having three or fewer tenancies, will also be allowed to terminate during the six-year term if they encounter financial or other hardship requiring sale of the property, or if the landlord or a close family member needs to live in the property.
However, Sinn Féin Spokesperson for Housing Eoin Ó Broin said that "at the heart of the bill is a profound change to how rents in the private rental sector will be set".
He added: "Based on the latest Residential Tenancies Board data for existing and new rents, the full-year cost of the market reset will be an average of €3,000 and up to €5,000, depending on location and type of property."
The Government has said it is introducing the legislation as part of an effort to attract more investment into the property market.
It has highlighted the additional security of tenure tenants will get from leases of at least six years.
