The first priority in the rebuilding was houses and businesses. It was vital to London’s survival that people should move back as soon as possible, and so the public building programme for churches was delayed until the 1670s. The Rebuilding Act detailed the four types of buildings allowed; two-storied houses on lanes, three-storied on street fronts, four-storied on principal streets, and mansion houses of ‘greatest bigness’ for merchants and other wealthy citizens. These were all to be faced in brick instead of wood.
The public building programme was financed by a new coal tax. Key buildings such as the Guildhall, Customs House, Royal Exchange, prisons, as well as churches and St Paul’s Cathedral were paid for by the tax. Also funded was the street widening scheme (owners were compensated for any reductions in their property), and the Fleet Canal and Thames wharf improvements.