Residents at Trent Basin say serious roof leaks have left some homes badly damaged and, in one case, barely habitable.
Between 20 and 30 properties in the first phase of the development are understood to be affected by problems allowing water to enter when it rains.
The first phase of Trent Basin, a regeneration project involving developer Blueprint and Nottingham City Council, was completed in 2016.
One resident, who asked not to be named, bought her three-storey terraced property for nearly £400,000 in 2024.
She first noticed water entering the property at the end of August after heavy rain.
“I was shocked, but I didn’t automatically assume it was the roof,” she said.
“I thought there must be a broken seal. I’ve had a leak before, where it had just lifted and needed a bit of rubber to seal it back, so I thought it was that.”
After the leak worsened, she inspected the flat roof and found water pooling on the surface.
She attempted temporary repairs herself but said the problem continued to deteriorate.
“All the little fixes I tried to do just were futile,” she said. “The walls are a dark brown. It looks horrendous. I’m sat here and my house is crumbling.”
The phase one properties were covered by a 10-year NHBC warranty and insurance policy when they were built.
The resident contacted Blueprint and contractor Willmott Dixon and was directed to warranty provider the National House Building Council.
Investigations by NHBC and independent builders found water had entered insulation between the roof and walls, according to the resident.
She said the roof structures are interconnected between properties, meaning repairs may need to cover an entire row rather than individual homes.
Residents have been advised to arrange emergency repairs and seek reimbursement from NHBC.
Emergency accommodation has also been discussed, with affected residents initially told they could arrange accommodation themselves and seek reimbursement.
The resident said electrical circuits had tripped and that she no longer felt safe remaining in the property.
“I don’t want to have my electricity on. Some of the circuit breakers have tripped so there’s obviously water touching wires,” she said.
“I don’t feel safe in my home. And if this takes a year then my house is literally going to be wrecked.
“I’m just so frustrated. Something needs to be done. Someone needs to intervene.”
An NHBC spokesperson said its 10-year Buildmark warranty protects homeowners where qualifying problems arise following construction.
The spokesperson said: “The builder is ultimately responsible for ensuring the homes they are building meet building regulations. We will always meet our obligations to our policy holders.
“We are in close contact with homeowners who have sought our assistance, including the resident, and necessary investigations are taking place to determine the cause of the problems.
“Due to the condition of this woman’s property, we are urgently arranging alternative accommodation for her.”
Willmott Dixon, which built the first phase for Blueprint, said it wanted repairs completed as quickly as possible.
A spokesperson said: “NHBC is the warranty provider for these homes and is now handling residents’ claims directly and has asked that correspondence goes through them.
“We are supporting that process and have been working with Blueprint and the manufacturer of the roofing product used on the first phase on a repair solution for the roofs affected.
“Any resident with an immediate concern about safety in their home should raise it with NHBC. Anything referred to us will be acted on without delay.”
Blueprint said it was working with residents, Willmott Dixon and NHBC.
A spokesperson said: “We are deeply disappointed that residents at Trent Basin are experiencing these issues and take their concerns seriously.
“Our teams have been working closely with residents to help them progress their NHBC warranty claims and to agree a more streamlined claims process so that essential repairs can be carried out as quickly as possible.
“We share the residents’ desire to see these issues resolved and will continue working with them, Willmott Dixon and the NHBC to support the process and help move matters forward wherever we can.”
Blueprint urged any affected residents who had not yet submitted an NHBC claim to do so and to contact the company for support.
Nottingham City Council did not respond to requests for comment.
By Joseph Connolly, Local Democracy Reporter