The High Court has heard Dublin's Lord Mayor Christy Burke has given his approval to works carried out by alleged trespassers living at a number of properties in Grangegorman.
The properties are the subject to proceedings brought by NAMA appointed receiver Luke Charleton, who is seeking orders prevent trespass by "Persons Unknown" at the various premises.
Three of the alleged trespassers, who gave their names as James Sutherland, Stephen Bedford and Gréum Ná Hearadh, appeared in court.
They informed Mr Justice Paul Gilligan that since they moved into the properties they have established a garden where they grow food, an art gallery space, a cafe space, a circus workshop, and underfloor heating from biomass.
Several of the people living at the premises, which includes a warehouse, have opposed the application in relation to what some of them claim has been their home for the last two years.
Mr Ná Hearadh said what had been done with what was a derelict area had received approval from people living in the area, as well as from the current Lord Mayor.
He said that before they moved in there had been a lot of underage drinking, noise and singing at the site.
He added since the group had moved in this anti-social behaviour had stopped.
Mr Ná Hearadh also invited the Judge to visit the site to see what had been done.
He and the others opposed an application put before the court by solicitor Graham O'Doherty for the receiver, who said his client wished to assert his right of entitlement to the properties.
Mr Sutherland, who said he has been living in the area for the last nine months argued the balance of convenience favoured the court not granting injunctions.
Mr O'Doherty said his client is entitled to the property and had insurance and health and safety concerns about the properties.
In 2012 Mr Charleton, of Ernst and Young, was appointed receiver by NAMA over numbers 3-11 Lower Grangegorman and numbers 22-27 North Brunswick Street.
It arose out of an unpaid debt of €21.9 million owed by businessman Paschal Conroy for loans advanced to him by AIB, which were later taken over by NAMA.
In an affidavit Mr Charleton said a number of people were found to be in unlawful occupation of two of the properties and they were written to stating they were trespassers.
On Monday 23 March around 40 security personnel and 12 contractors brought in to put up fencing attended the property on behalf of the receiver.
Mr Charleton says a certain amount of "obstruction and disorder" took place.
Aidan Devlin, an employee of LAS Security, which the receiver instructed to attend the premises, said there were various attempts at obstruction on Monday by people unlawfully on the premises.
He said that security staff who secured the property had missiles thrown at them by persons they could not identify.
He said the occupants of the premises were "rallying support" via Twitter and Facebook.
Gardaí were in attendance in the event of any breach of the peace, he said.
In reply the three respondents rejected that they were responsible for any trouble at the site.
Following the conclusion of submissions from both parties, Mr Justice Gilligan reserved his decision and said he will give judgment tomorrow.
