Building work on the new £2.1 million primary school at Elvetham Heath in Fleet is on hold after TSL Construction went into administrative receivership.
The shock news comes just a week after the landmark development was named Britain's richest community, boasting a postcode with household incomes averaging a staggering £64,000.
The report also placed the ever-growing estate second in the number of households with incomes of more than £100,000.
Hampshire County Council is now working with the receiver to find a new contractor to complete the school, which was due to open in September.
While a new contractor is found, a double temporary classroom including toilet facilities, will be provided to accommodate the pupils who will move into the school once it has been completed.
The school was given the go-ahead last year and when completed will provide seven classrooms, a hall, music drama room and other teaching and administrative facilities.
Hampshire County Council leader Ken Thornber said it was "unfortunate" that the building work had temporarily come to a halt.
"We are working swiftly to get a new contractor on site to complete the building works, but there will clearly be a delay in the completion of this project," he said.
"To ensure that pupils and teachers are not disrupted any further and that the resources needed to continue with their studies are available, temporary classrooms will be provided and removed once the project is finished."
The news comes just after the school's first Ofsted report, which identified only one item for improvement and that related to the school's temporary premises.
The report states: "The space available in the temporary accommodation is relatively small. This restricts the number of computers that can be placed in classrooms.
"As a result, there are not enough for all pupils to practice their skills sufficiently often.
"This prevents them from reaching the expected levels in information and communication technology."
The school said the problem will be resolved when the school's permanent building is completed.
Elvetham Heath Developments, which is overseeing work on the site, said it was "regretful" news that is likely to have an adverse impact on the planned completion of the new school building.
"Elvetham Heath Developments are not involved with the building of the school and it is a matter to be resolved between Hampshire County Council and their contractors TSL," added the company.
Elvetham Heath Developments wish to emphasise that housebuilding and other operations at Elvetham Heath are not affected by this news.
The wealth list, drawn up by CACI Information Solutions, shows Elvetham Heath is even better off than fashionable Kensington and Chelsea but the man in charge of the development is quick to point out it is not just a place for the rich.
"One interpretation of this survey is that the development is exclusive to high-income earners and other house buyers are priced out of the market," said Nick Scregg, managing director of Elvetham Heath Developments.
"We would strongly refute this, as prices at Elvetham Heath are comparable with other new houses being built in the area.
"Part of the vision of Elvetham Heath in the planning stages was to create a development that reflected the varying needs of the whole community.
"Planning guidelines govern the allocation of social housing to every large-scale development and Elvetham Heath is no different."
Mr Scregg said social housing accounts for about 16% of the 1,868 homes on the site.
The homes are provided by Hart, Hyde and Thames Valley Housing Association throughout the development.
A range of two and three bedroom houses and two bedroom flats are being built with about a third available for rent, while two thirds will be sold on a shared ownership basis.
Mr Scregg added: "Elvetham Heath has achieved what it set out to do - to provide a high quality development principally for the local area.
"To date, more than 32% of Elvetham Heath residents have moved from Fleet and Church Crookham and 63% have moved from within a ten-mile radius."
The CACI findings are based on PayCheck, a system that provides estimates of gross household income including investments and social security right down to the level of postcode.