Plans for a 28-storey hotel just off the M50 in Castleknock have been lodged with Fingal County Council.
The massive development at the site of a former gym at junction 6 on the city motorway is likely to be marketed as an airport hotel.
If it gets the go ahead the towering scheme will dominate the skyline at the N3 Navan Road exit off the busy orbital route.
Propotron Limited has submitted plans seeking to demolish the building which originally housed a gym and build a hotel and office complex on the four-acre site.
It proposes constructing a 459-bedroom hotel and office suites in four blocks ranging in height from 13 to 28 storeys.
Also proposed is car park space for 232 vehicles, 710 bicycle parking spaces and a retail cafe and set down area for the hotel.
There are also plans for a roof terrace, public plaza, coach bays, shuttle bus set down areas, drop off zones, and electric vehicle charging points.
The hotel, office and café elements are expected to cover a gross floor area of almost 58,000sqm with improved site access also proposed.
The council is due to rule on the application in early October.
Meanwhile permission has been granted for a 12-storey apartment complex that will overlook the Omni Shopping Centre in Santry.
An Bord Pleanala gave the go-ahead for the 324-unit scheme under fast-track planning procedures in the face of local opposition.
Social Democrats co-leader Roisin Shortall TD warned of the “over development” of Santry and said the height and scale of the project was excessive.
She said: “A 12-storey, 324 apartment development is completely unsuitable for Santry and utterly out of sync with the character of the area.
“Granting yet another high-rise apartment block without proper infrastructure and amenities flies in the face of good planning and sustainable development.
“The SHD system effectively squeezes the public out and relegates the council’s role in planning applications. It clearly prioritises landlords and developers at the expense of communities.
“This system, along with the relaxation of apartment standards and the lifting of height caps, has led to the over-development of Santry.
“It is clear from An Bord Pleanála’s inspector’s report that… Dublin City Council has serious concerns regarding its height, scale and massing and impact on the changing character of Santry.
“Yet again, we see the recommendations of the local community, as well as the local planning authority, being overwritten by the board.”