The Valuation Office Agency is required to review council tax bands at the point of sale when a property has previously been improved. This review will result in either a band increase or the band remaining unaltered. The number of properties reviewed and the outcome of this review, for each year since 1997, broken down into Government regions for England, are as follows:
31 March to 1 April Band increased Band unaltered Band increased Band unaltered Band increased Band unaltered Band increased Band unaltered Band increased Band unaltered 1997-98 313 1,497 688 2,286 275 1,037 186 779 316 1,484 1998-99 286 1,268 755 1,814 287 1,120 190 735 389 1,547 1999-2000 563 2,570 974 4,115 469 1,582 255 1,369 669 3,768 2000-01 472 2,269 753 3,483 411 2,025 275 1,378 669 3,206 2001-02 581 2,791 1,003 4,481 376 2,418 428 1,837 913 3,574 2002-03 639 3,556 1,186 4,972 800 4,604 428 1,799 933 4,596 2003-04 707 4,069 1,181 4,832 751 4,650 359 1,968 782 4,827 2004-05 709 5,526 1,438 6,725 847 4,327 336 2,278 847 5,837 2005-06 867 6,009 1,956 7,497 1,232 5,664 364 2,334 979 5,986 2006-07 852 5,076 2,029 7,136 1,406 4,639 432 2,458 949 5,869 2007-08 1262 6,891 3,236 9,626 2,923 7,217 750 3,279 1,540 8,375 2008-09 558 3,231 1,379 5,589 1,305 3,243 283 1,500 724 3,604
31 March to 1 April Band increased Band unaltered Band increased Band unaltered Band increased Band unaltered Band increased Band unaltered 1997-98 1,386 3,121 833 1,757 376 1,228 203 928 1998-99 890 2,760 742 1,580 441 1,274 204 1,690 1999-2000 1,288 5,731 982 3,112 556 2,455 410 1,691 2000-01 1,288 5,492 886 3,089 652 2,555 385 1,543 2001-02 1,464 6,742 727 3,777 540 2,618 595 2,206 2002-03 1,961 8,660 998 4,801 557 3,621 499 2,404 2003-04 1,619 7,139 853 4,334 675 3,733 555 2,988 2004-05 2,072 10,379 1,194 5,754 770 4,315 646 3,838 2005-06 2,543 11,936 1,304 6,996 999 5,517 756 4,435 2006-07 2,857 11,217 1,519 7,065 1,005 5,097 868 4,588 2007-08 4,611 15,296 2,333 9,453 1,438 6,703 1,305 5,446 2008-09 1,868 6,743 970 4,193 664 3,164 655 2,458