CONCERNS have been raised by the Housing Authority and the National Fire Authority regarding the structure of houses in informal settlements.
The issue emerged this week following an early morning fire at Cunningham which destroyed two houses and left about 10 families homeless.
Housing Authority CEO Alipate Naiorosui said the situation was a great risk which must be monitored, however, he added it was outside the authority's scope.
"New houses under the Housing Authority are carried out with the Town and Country Planning Act," he said.
"There is a is a standard that needs to be followed such as the size of blocks, the distance from nearby houses and the other relevant details."
Mr Naiorosui said with formal settlements, there were laws to be followed.
"When clients or customers build their houses, the building has to go to the respective authorities for approval and there are building lines that are to be followed."
NFA chief executive John O'Connor said firefighters tried their best to prevent the fire from spreading to other houses.