An investigation has been launched into energy costs at an affordable housing estate after residents received “extortionate” bills.

The energy ombudsman is investigating energy prices and standing charges at the Orchard Village estate, Rainham, after a home owner complained of paying up to three times more than expected.

Colin Nickless, of Broadis Way, opened the case with the independent watchdog last week after paying more than £1,000 for hot water and heating in one year, despite his energy performance certificate stating bills should amount to £334 a year.

The row is the latest in a series of issues reported by residents, run by Circle Housing, including problems with damp and leaks in some homes built three years ago.

The certificate, given to Mr Nickless when he moved in, was published by Stroma, energy assessors for contractors Willmott Dixon who built the estate.

Energy is provided through a communal off-site boiler, supplied by energy company SSE, and home owners are not allowed to switch providers.

“It’s scandalous really,” said Mr Nickless, who said he has to pay an initial £452.50 a year as a standing charge on his property before using any units of heat.

Circle’s head of housing Karen Ayling said the association was looking into the matter urgently and would keep residents updated.

“We are committed to working with residents to help keep their energy costs down,” she said. “Only home owners on the estate have to pay the full standing charge, while Circle subsidises the fee for social tenants.”

The Ombudsman Services confirmed receiving the complaint, which was lodged on behalf of 87 other households but will be investigated on its own.

Other home owners on the estate have since logged their own cases with the ombudsman.

Another resident of Broadis Way received a bill – seen by the Recorder – of £884.53 for a five-month period.

“I was honestly just shocked,” said the resident. “It’s extortionate. It’s supposed to be affordable housing but it’s not affordable.”

Rainham MP Jon Cruddas pledged to raise the issue with the Department of Business, Energy and Industrial Strategy.

“The concerns surrounding utility bills are part of ongoing discussions into the wider issues at the Orchard Village development,” he said.

“I find it unacceptable that residents are unable to choose their own energy provider, as this takes away the ability to find a deal that works for them.”