Housebuilders鈥 operating margins have collapsed more dramatically than during the recession of the early nineties, the latest data from financial services firm BDO Stoy Hayward has revealed, writes Tom Bill.

The falls, which are the result of land and goodwill writedowns, produced an average operating loss of -26% across the sector in the first six months of 2008.

Richard Kelly, construction partner at BDO, said: 鈥淭he market hasn鈥檛 deflated, it鈥檚 exploded. This is a deeper and more sudden correction than the previous recession.鈥

He added: 鈥淢any housebuilders would probably welcome an operating margin of only 鈥17% as seen by Barratt in 1991.鈥

The average operating margin at Persimmon, Barratt and Bovis Homes reached a 鈥7% low point in 1991, followed by 1% in 1992 and 7% in 1993.

The overall figures this year were skewed by large operating losses at Taylor Wimpey (鈥94%) and Redrow (鈥67%).

Taylor Wimpey鈥檚 loss included a writedown of 拢1.5bn; 拢690m in land and 拢816m in goodwill from the George Wimpey and Taylor Woodrow merger.

Meanwhile, Redrow wrote down 拢259m from its landbank in September, a cut deeper than its rivals鈥 as it was based on the open market value of the land as opposed to site profitability.

BDO said it expected further land writedowns next year and Merrill Lynch analyst Mark Hake has estimated that up to 拢13.3bn could be written off the land value of the big seven listed housebuilders, wiping out the previous decade鈥檚 combined pre-tax profit of 拢11.3bn.

Kelly said profit figures were now largely irrelevant. 鈥淚t鈥檚 secondary to cashflow. Profit has to be turned into cash, which has to service financing.鈥