Capital living: Spin this couch around and make yourself at home.

'Tis the season for more stairwell decorations in the building.

Bizarre graffiti complements tagging in the Quantum on Boulcott stairwells.

After another police callout, and evidence of unwanted guests fouling stairwells, a Wellington property developer says he is investigating the situation at the Quantum on Boulcott apartment building.

The stairwells were speckled on Thursday with tagging, graffiti, derelict furniture and, in one spot, a pile of stinking human faeces and toilet paper.

Police were again called to the apartment building, in Boulcott St in the central city, on Thursday after reports of a menacing man trying to get into rooms.

JOHN WEEKES/FAIRFAX NZ A mattress and pillows in the basement car park of the Quantum on Boulcott apartment building.

Two people, an existing tenant and another about to move in, said they were nervous about "a dodgy guy" interfering with doors.

READ MORE: Wellington woman describes terrifying home invasion, man arrested

Police entered the multi-storey apartment block after receiving a call at 1.10pm of a man wearing a white beanie and black puffer jacket behaving suspiciously.

KEVIN STENT/FAIRFAX NZ. In October, police arrested a man accused of holding a woman hostage in the Quantum Apartments on Boulcott Street.

The man was not found.

On Thursday, a staffer at property management firm Te Aro Tenancies said the manager responsible for Quantum on Boulcott was unavailable, and she had "no comment to make".

On Friday evening, the human waste was still present near the 9th-floor stairwell, while a mattress and pillows lay in the basement car park, and the lift had fabric torn off its walls.

The building is owned by TWC Quantum Apartments. Company director Ian Cassels, who said he was surprised to hear of the issues, promised to investigate.

In October, a man thought to have been armed with a knife or baton tried to enter Danelle Stella's home in the Quantum Apartments early one morning with a swipe card.

"I put a knife through the door to try to stop him," she said at the time.

Police said this week that simple steps could greatly enhance security for property owners and tenants.

"The holiday period is a particularly high risk period for thefts," a police spokeswoman said.

"Adequately securing a building is a simple and effective way of deterring thieves.

"Using a good quality lock and considering installing security lighting near homes and buildings can also be helpful."