Window and door rules axed in drive to get Britain building houses However, it will lead to fears that greater numbers of poorly designed homes may be built in some areas. The average new home now has the same floorspace as a tube carriage, and home sizes have halved since the 1920s. Mr Cameron will tell the Federation of Small Business that his will be the first Government in modern history to leave office with fewer regulations than when it entered, saving firms £850m a year. He will promise to scrap "needless" health and safety regulations dictating how to use ladders and what non-smoking signs should look like. The forthcoming Deregulation Bill will make one million self-employed people exempt from health and safety altogether. A "ridiculous" rule that dictated that childminders who give food to infants need to register as a food business has also gone. His Government has already amended the "crazy" Equality Act that means people cannot sue their employer if they are "insulted" by a customer, the Prime Minister will say, and shopkeepers no longer need a poison licence to sell oven cleaner. I have insisted on slashing needless regulation. We will be the first government in modern history to have reduced - rather than increased - domestic business regulation during our time in office," the Prime Minister will say. This will make it easier for you to grow, to create jobs and to help give this country the long-term security we are working towards. More than 1.3m new jobs have been created since I came to office - many of them by small businesses. And I know many of you want to grow further - or may be thinking of employing your first person - but have been put off or held back by red tape. He will also announce 80,000 pages of so-called "green tape" environmental regulations will be ditched by March 2015, saving firms £100m a year.