Permission has been granted for the refurbishment of Killincarrig House and the construction of 17 three-bedroom houses and a commercial unit.
The original house to be refurbished on the site, which is also known as Killincarrig Lodge, will have two storeys and four bedrooms.
There will be access from both the R761 and Delgany Hills, with upgrades to existing routes.
Nineteen submissions were made to Wicklow County Council regarding the application by developers Glenveagh.
The council sought some further information during the process.
They had concerns that the public open space included was not sufficient. They also required the bin storage area to be relocated.
The property went on the market in September 2019, with a price tag of €6.3 million.
The 2.3 acre site is located within an area with split zoning objectives under the Greystones Delgany Local Area Plan 2013-2019, which has now expired.
Around half the site to the west is zoned 'Existing Residential', while the remaining 50 per cent is zoned 'Small Local Centre'. A portion of the site also falls within the Killincarrig Architectural Conservation Area.
In April 2018, An Bord Pleanala overturned a decision by Wicklow County Council to renovate the site, making way for an apartment block.
Concerns about flooding and the removal of high levels of mature trees in the area were behind the ABP decision.
The council had granted permission to Targets Investment Opportunities ICAV to build 33 residential units, a mix of apartments and two-storey houses, two commercial units and all associated site works at Killincarrig.
Anne Whelan and Delgany Hill Management Company Ltd successfully appealed the decision at that time.
Previously, in 2016, Wicklow County Council refused an application for the demolition of Killincarrig House for the development of two apartment blocks of three-storey height over a basement car park with a four-storey penthouse level, the development of ten two-storey houses, a two-storey mixed use building and all site works.
Killincarrig House has been vacant for more than 30 years.
There were two other Killincarrig houses in the area in the past.
The original one was at the current golf club on Whitshed Road. When the owners, the Hawkins/Whitshed family, decided to build a better one closer to the sea, they took the house name with them.
The new house was opposite the Greystones United football grounds, roughly where Woodlands apartment block is now. That house burned down in the 1970s.
Burnaby estate farm manager Wilfred Evans and his family were given the house by the Burnaby family in the 1960s. The house was already in poor condition then and the family moved out some years later.