Demolition has begun on the Tara Towers Hotel in Booterstown.
The D4 landmark was bought by hotel group Dalata three years ago for €13.2m.
But the current hotel will not be missed by residents, according to Fine Gael councillor Paddy McCartan.
"I have always regarded it as a second-rate structure. It has more or less become derelict," he said.
"I'm in favour [of demolition]. This has been on the cards for a while now. I regard it as a blot on the landscape."
Dalata plans to construct the 140-bedroom four-star Maldron Hotel. It is scheduled to open in early 2021, alongside a complex of 57 apartments.
Builders McAleer and Rushe has been appointed for the scheme, expected to cost €51m.
Meanwhile, the owners of the historic Wynn's Hotel in Dublin have secured the green light for a two-storey extension.
An Bord Pleanala gave it the go-ahead, despite the board's own inspector recommending refusal.
The development involves a revamp and increasing the number of floors to seven, adding 27 bedrooms.
Senior planning inspector John Desmond had recommended refusal after concluding the development would be contrary to the planning and development of the city centre.
He felt it would seriously injure amenities of neighbouring buildings by loss of daylight and being visually overbearing.
However, in a two-to-one decision, the board voted to disregard his recommendation.
The board said it agreed with the city council that the site was in a dense urban environment, there was a need to ensure sustainable development on scarce urban land and that the proposal would not preclude development on neighbouring sites.
The board also said the development would not adversely affect the street environment of Harbour Court, nor seriously injure the amenities of neighbouring properties.
The hotel in Abbey Street has existed since 1845. It held the first meeting to establish the Irish Volunteer Force in 1913, was bombed during the 1916 Rising and rebuilt in 1921.