He said: "If we keep this up, sales over the year would be £1.3bn. It was a record May and this month is even stronger. Volumes are a record for June and so are the margins."
Managing director Tony Pidgley was equally bullish about prospects, despite City concerns that interest rates rises may hit housing demand.
He said: "The housing market is as strong as we've ever seen it.
"Interest rates are not a big factor. It's more to do with the feelgood factor and confidence in the economy. It would need a real disaster to change that."
They made the comments as Berkeley unveiled another record set of results, with pre-tax profit for the year to 30 April jumping 24% from £143.6m to £178.1m.
Turnover was also higher, up from £799m last year to £867m. Unit sales fell 373 to 2542 but the average selling price increased £27,000 to £278,000.
The group's shares fell 28p to 721p because of City concerns that 40% of buyers are investors, leaving it vulnerable to a downturn.
The group also announced that main board directors David Martin and Michael Freshney were stepping down. Martin, the commercial director, leaves the group at the end of next month; Freshney retires next year.