A dilapidated £4 million mansion on a pristine Chelsea street attracts rats and foxes through broken windows, while its garden has become a dense Japanese knotweed jungle. A mummified corpse was discovered in the basement, yet the owner maintains a £6 million property portfolio.
The Mansion’s Shocking State
Japanese knotweed towers 10 feet high over the back wall and invades neighboring gardens after years of neglect. Smashed windows, a crumbling roof, and boarded-up sections plague the property, owned for 43 years. Drains have flooded the interior, creating a swamp that breeds rats and foxes, whose screeching disturbs residents at night.
Owner’s Property Empire
Nicholas Halbritter, former Conservative councillor for Kensington and Chelsea, chairs the local Royal British Legion branch. He oversees education, arts, and children’s services from 2002 to 2006. Halbritter, a former architect, received a mayoral award in 2022 for veteran fundraising and attended a Downing Street reception for the Armed Forces in 2023. He also leads guided tours for the Friends of Brompton Cemetery.
Besides the Chelsea home, Halbritter owns a three-storey terraced townhouse in southeast London, converted into flats yielding about £72,000 annually. He sold another for £650,000 in 2024. Henry Sherwood, founder of The Buying Agents, estimates: “Rent-wise in southeast London, you’re looking at around £2,000 a month for a two-bed and £1,500 for a one-bed. The property itself would be worth £1.2 million. Yields are better there.”
Rental History and Tragic Discovery
From 1982 to 2010, Halbritter rented rooms in the Chelsea mansion alongside his late mother, Elizabeth, a convicted shoplifter. Neighbors describe him as an aggressive landlord lacking duty of care. “He used to have lodgers who needed consoling after his outbursts. He’s not a nice man,” said neighbor Nik Hoexter.
The last lodger, Irish builder Frank, vanished after frequenting a local pub. Residents alerted authorities, who climbed in via a ladder and found his mummified remains in the basement. The discovery so distressed a rookie officer that neighbors offered him whisky. Police vomited from the decomposition, but the cause of death remains undetermined, with no involvement from Halbritter.
Neighbors’ Ongoing Nightmare
Forty-six residents petitioned the Royal Borough of Kensington and Chelsea (RBKC) over the ‘neighbor from hell.’ Nik Hoexter, a 40-year resident, noted: “Dead rats appear, and a huge fox required council removal. The basement is derelict and inaccessible. It smells in summer, and I’m worried about children entering—the door stays unlocked.”
Christine Gambles added: “Tenants rented floors when we moved in, but now wildlife lives inside. My housekeeper says he doesn’t reside there but appears occasionally. I can’t sell due to the knotweed; buyers can’t get mortgages. He just cut it—illegal—and was fined.”
Knotweed Crisis and Council Response
Emily Grant, director of Environet, warns removal costs £10,000-£20,000 via excavation or £5,000 over five years with herbicide, though the latter may fail on established roots. “Neighbors suffer structural risks and must disclose it within three meters of boundaries, deterring buyers and mortgages,” she said.
RBKC issued a Section 215 order, forcing Halbritter to clean up. The irony strikes as the ex-councillor now faces borough enforcement.
