Baggies manager Roy Hodgson was unsuccessful with a first offer for the 27-year-old last week.
The Premier League club have now returned with improved terms but it has not matched Birmingham's valuation of the defender.
Ridgewell has been previously linked with moves to Everton, Newcastle United and Queens Park Rangers.
Restore Data
| Team | P | W | D | L | F | A | GD | PTS | |
| 1 | Leeds UnitedLeeds | 38 | 23 | 11 | 4 | 76 | 25 | 51 | 80 |
| 2 | Sheffield UnitedSheff Utd | 38 | 25 | 7 | 6 | 53 | 28 | 25 | 80 |
| 3 | Burnley | 38 | 21 | 15 | 2 | 52 | 11 | 41 | 78 |
| 4 | Sunderland | 38 | 19 | 12 | 7 | 55 | 37 | 18 | 69 |
| 5 | Coventry CityCoventry | 38 | 17 | 8 | 13 | 55 | 48 | 7 | 59 |
| 6 | West Bromwich AlbionWest Brom | 38 | 13 | 18 | 7 | 48 | 34 | 14 | 57 |
| 7 | Bristol City | 38 | 14 | 15 | 9 | 49 | 41 | 8 | 57 |
| 8 | Middlesbrough | 38 | 15 | 9 | 14 | 57 | 48 | 9 | 54 |
| 9 | Blackburn RoversBlackburn | 38 | 15 | 7 | 16 | 42 | 40 | 2 | 52 |
| 10 | Watford | 38 | 15 | 7 | 16 | 47 | 51 | -4 | 52 |
| 11 | Millwall | 38 | 13 | 12 | 13 | 37 | 39 | -2 | 51 |
| 12 | Sheffield WednesdaySheff Weds | 38 | 14 | 9 | 15 | 53 | 59 | -6 | 51 |
| 13 | Norwich CityNorwich | 38 | 12 | 13 | 13 | 60 | 54 | 6 | 49 |
| 14 | Preston North EndPreston | 38 | 10 | 17 | 11 | 39 | 44 | -5 | 47 |
| 15 | Queens Park RangersQPR | 38 | 11 | 12 | 15 | 44 | 50 | -6 | 45 |
| 16 | Swansea CitySwansea | 38 | 12 | 8 | 18 | 38 | 49 | -11 | 44 |
| 17 | Portsmouth | 38 | 11 | 9 | 18 | 46 | 61 | -15 | 42 |
| 18 | Oxford UnitedOxford Utd | 38 | 10 | 12 | 16 | 39 | 55 | -16 | 42 |
| 19 | Hull City | 38 | 10 | 11 | 17 | 39 | 47 | -8 | 41 |
| 20 | Stoke CityStoke | 38 | 9 | 12 | 17 | 37 | 51 | -14 | 39 |
| 21 | Cardiff CityCardiff | 38 | 9 | 12 | 17 | 42 | 62 | -20 | 39 |
| 22 | Derby CountyDerby | 38 | 10 | 8 | 20 | 40 | 51 | -11 | 38 |
| 23 | Luton TownLuton | 38 | 9 | 8 | 21 | 34 | 60 | -26 | 35 |
| 24 | Plymouth ArgylePlymouth | 38 | 7 | 12 | 19 | 40 | 77 | -37 | 33 |
| > Championship Full Table | |||||||||
