About 26% of the Bristol’s City Council’s administrative area has impermeable surfaces and is soil sealed. The Bristol Local Plan has successfully promoted brownfield development and densification of the city centres, avoiding development on greenfields. During the last decade 2001-2011, 98% of business development, 95% of new homes and 58% of new industries were on brownfield land. Population density has increased from 53 to 60 inhabitants per hectare with particular growth in the city centre. Since 2001 an average density of 230 dwellings per hectare (dph) has been achieved in the city centre (Bristol city), whereas in inner and suburban areas lower densities have been achieved such as 134 dph and 55 dph respectively.