Billionaire's Renovation at Conholt Park Sparks Water, Planning and Neighbourhood Tensions

Steve Schwarzman, the US private equity executive and chief executive of Blackstone, is completing a large renovation at Conholt Park in Wiltshire that has prompted a ban on water tanker deliveries to a newly created lake and drawn mixed reactions from neighbours and local officials.

Southern Water asked the estate this week not to direct tanker‑delivered water into the three‑acre lake after residents in neighbouring Hampshire — where a hosepipe ban is in force — filmed tankers taking water from standpipes and delivering it to Conholt Park. Tim McMahon, Southern Water’s managing director, told the BBC he was "appalled by this use of water," and the company said it had seen a recent, "significant" spike in reported tanker activity serving the estate.

Schwarzman, who bought the Grade II‑listed shooting estate for about £82 million in 2022, has overseen works that include an extension to the mansion, a south lawn enlargement, tree planting and the creation of a sunken fence or "ha‑ha". Company representatives said the project is nearing completion and insisted that water used on site has been sourced through licensed providers and that a "highly sophisticated water collection system" aggregates rainfall for the lake.

Local residents, however, have raised concerns about the quantity and origin of water used to fill the lake, which has been reported as holding up to nine million gallons. Some villagers told the Daily Mail they saw tankers running day and night along narrow lanes, leaving potholes in their wake and disrupting local life. Workers on the estate told the newspaper they had signed non‑disclosure agreements and were unable to speak publicly about the works.

"If it ain't broke don't fix it — the enormity of that lake he's created... it just becomes a bit obscene," one resident who has lived in the area for more than a decade told the Daily Mail. Another neighbour said the estate had become effectively a "hotel" for visiting business guests and voiced concerns about privacy and access when helicopters are reportedly used to fly visitors in.

A Blackstone spokesperson and representatives for the estate said commercial tankers servicing the property have operated within the law and that water has been purchased and transported largely from locations outside the region. They said most tanker deliveries were used to support construction and personnel during the bulk of the renovation and that only a portion of recently delivered water was being used for irrigation and the lake as construction winds down. The estate said it had readjusted supplies following Southern Water’s request.

The dispute highlights a legal distinction: Wiltshire, where Conholt Park lies, has not imposed drought restrictions, while southern parts of neighbouring Hampshire have hosepipe bans. Southern Water supplies more than two million customers in Hampshire and the Isle of Wight and enforces temporary use restrictions in drought or low‑supply conditions. Company officials said licensed tankers can legally supply non‑domestic construction sites even where domestic water use is restricted.

The renovation has brought economic benefits and strains to the small local economy. The landlord of the nearest pub said the influx of construction workers and estate staff boosted trade, and some villagers praised local hiring and philanthropic gestures by the new owner. Sources close to Schwarzman have noted his donations to UK institutions, including a multi‑million‑pound gift to the University of Oxford.

At the same time, residents reported that fences and newly planted trees have removed long‑admired public views across the estate, and some said changes have pushed up local house prices, making it harder for long‑term residents to remain in the area. Claims that Schwarzman has acquired additional properties nearby for staff housing and that security measures have intensified have fuelled unease, although the estate’s representatives maintained the work is focused on restoration and preservation of a heritage property.

Schwarzman, 78, has deep political and business ties internationally and has previously been linked to high‑profile political visitors. The estate’s representatives declined to comment on speculation about guests. Local officials in Wiltshire approved the redevelopment plans last July, and the estate says the project is being carried out in accordance with planning and heritage protections.

Southern Water’s intervention is the most visible official action to date. The company said it had asked that tanker deliveries not be used to fill the lake and that it was investigating reports of water drawn from standpipes. The estate said it complied with the request and reiterated that any suggestion it had violated local water regulations would be "false and misleading."

As the restoration approaches completion, residents and local businesses are left weighing the short‑term economic gains from the works against longer‑term changes to the landscape, infrastructure and housing market. Local authorities and water companies are monitoring the situation, and estate representatives say final works will conclude soon and that operations will continue within applicable laws and regulations.