Jeremy Peat, a senior BBC trustee, and Mark Thompson, the BBC's director-general, appeared before the committee to lay out the Corporation's plans to enhance financial transparency.
Peat said they would be happy to consider NAO as auditor if the government financial watchdog is interested in the contract. The next contract would be tendered in 2012.
Thompson said although phase one of the Broadcasting House redevelopment got delayed and crossed the budget, phase two is on track and would be within the budget.
The PAC hearing primarily looked at the BBC building programme, which included the Broadcasting House in London, its Salford Quays development in the north-west and the new BBC Scotland headquarters in Glasgow.
The BBC also admitted that its rooftop studio in Vienna built for Euro 2008 cost £573,000, double the previously disclosed amount.