| Seddon Construction | Bolton, West Midlands, Country | 23 | 20 |
| Willmott Dixon Construction | Letchworth Garden City, Hertfordshire, North Warwickshire | 5 | 16 |
| Morgan Sindall Construction & Infrastructure | London, West Midlands, Postal Code | 5 | 11 |
| Novus Property Solutions | Stoke on Trent, Staffordshire, Stoke-on-Trent | 4 | 32 |
| Morris & Spottiswood | Warrington, Glasgow, Glasgow City | 4 | 7 |
| GF Tomlinson Building | Little Eaton, Little Eaton Derby, Derby | 4 | 3 |
| Caddick Construction | West Yorkshire, Knottingley | 4 | 5 |
| Esh Construction | County Durham, Durham, Bowburn | 3 | 34 |
| MITIE Property Services | South Lanarkshire, Swindon, Rutherglen | 3 | 23 |
| John Graham Construction | Hillsborough, County Down, Down | 3 | 21 |
| Wates Construction | Leatherhead, Surrey | 3 | 24 |
| Lindum Group | Lincoln, Country | 3 | 25 |
| Kier Construction | Sandy, Manchester | 3 | 16 |
| Interserve Construction | Birmingham, Interserve Construction Limited, West Midlands | 3 | 14 |
| Lovell Partnerships | Staffordshire, Tamworth | 3 | 12 |
| Speller Metcalfe Malvern | Malvern | 3 | 4 |
| Conamar Building Services | Stevenage, Herts | 3 | 3 |
| Galliford Try Construction | Uxbridge, Middlesex | 3 | 3 |
| Eric Wright Construction | Preston | 3 | 4 |
| Vistry Partnerships North West | Kent, West Malling | 3 | 3 |
| Engie Regeneration | Newcastle upon Tyne, Salford | 2 | 40 |
| Bell Decorating Group | North Lanarkshire, Airdrie | 2 | 33 |
| VINCI Construction | Hertfordshire, Watford | 2 | 23 |
| Gelder | Lincoln | 2 | 20 |
| J Tomlinson | Birmingham, Nottingham | 2 | 16 |
| Ductclean | Welwyn Hatfield, Hertfordshire | 2 | 14 |
| M & J Group Construction & Roofing | Bedford | 2 | 14 |
| Trident Maintenance Services | North Lanarkshire, Coatbridge | 2 | 10 |
| DLP Services Northern | Salford, Greater Manchester | 2 | 9 |
| F Parkinson | Blackpool | 2 | 9 |
| Rhodar | Leeds | 2 | 11 |
| Em1 | Hambleton, Northallerton | 2 | 8 |
| Jennings Roofing | Leeds | 2 | 8 |
| ISG Construction | West Midlands, London | 2 | 7 |
| RG Carter Cambridge | Norfolk, Norwich | 2 | 13 |
| United Living North | Swanley, Altrincham | 2 | 6 |
| J Greenwood Builders | Chadderton | 2 | 5 |
| 2 Anwyl Construction | Flintshire | 2 | 4 |
| Lar | Stockport | 2 | 4 |
| Ashe Construction | Herts, Hitchin | 2 | 4 |
| Speller Metcalfe | Worcestershire, Malvern | 2 | 3 |
| Top Notch Contractors | Carlisle | 2 | 5 |
| Bay Building Services | Lancaster, Morecambe | 2 | 4 |
| CPL Heating & Plumbing | Preston | 2 | 4 |
| Afm Gas Services | Allerdale, Workington | 2 | 4 |
| PPM | Carlisle | 2 | 3 |
| Colin Briscoe Construction | Lancaster, Carnforth | 2 | 2 |
| E Thompson | Preston | 2 | 2 |
| John Turner Construction Group | Preston | 2 | 2 |
| Michael Thompson | Carlisle | 2 | 8 |
| Stobbarts | Allerdale, Workington | 2 | 8 |
| PK Engineering | Carlisle | 2 | 5 |
| Cubby Construction | Carlisle | 2 | 5 |
| BK Builders | Barrow-in-Furness, Dalton in Furness | 2 | 3 |
| Postlethwaite Construction | Carlisle | 2 | 2 |
| Shaylor Group | West Midlands | 2 | 2 |
| City Build Manchester | Preston | 2 | 2 |
| Emchia Asbestos Solutions | South Ribble, Preston | 2 | 2 |
| Enviraz Scotland | Renfrewshire, Hillington | 2 | 2 |
| J&J Electrical Cumbria | Allerdale, Workington | 2 | 2 |
| MDS | Stockton-on-Tees, Cleveland | 2 | 2 |
| Morgan Sindall Consortium R1 A B C D E F G H I R2 A B C D E F G H I R3 A B C D E F G H I R4 A B C D E F G H I R5 A B C D E F G H I R6 A B C D E F G H I R7 A B C D E F G H I | London | 2 | 2 |
| Warden Construction | Preston | 2 | 2 |
| AECOM | London | 1 | 137 |
| Atkins | Epsom | 1 | 128 |
| Faithful & Gould | London | 1 | 44 |
| Savills | London | 1 | 30 |
| Currie & Brown | London | 1 | 29 |
| Ridge & Partners | Woodstock | 1 | 38 |
| Mears | Welwyn Garden City | 1 | 33 |
| Arcus Consulting | Sale | 1 | 16 |
| Curtins Consulting | Liverpool | 1 | 16 |
| Bam Construction | Hempstead | 1 | 16 |
| Casey Group | Rochdale | 1 | 17 |
| Align Property Partners | Northallerton | 1 | 15 |
| Aa Projects | Manchester | 1 | 11 |
| RSK Environment | Coventry | 1 | 20 |
| Overbury | Greater London | 1 | 18 |
| WYG Engineering | Leeds | 1 | 17 |
| CPC Project Services | London | 1 | 16 |
| Cushman & Wakefield | London | 1 | 16 |
| Kier Services | Bedfordshire | 1 | 12 |
| Midas Construction | Bristol | 1 | 11 |
| Bowmer Kirkland | Derbyshire | 1 | 9 |
| Galliford Try Building | Middlesex | 1 | 7 |
| Robertson Construction Group | Stirlingshire | 1 | 11 |
| Bouygues | London | 1 | 9 |
| Engie | Rotherham | 1 | 10 |
| Identity Consult | Sunderland | 1 | 8 |
| Campbell Reith Hill | London | 1 | 7 |
| Farrans Construction | Dunmurry | 1 | 7 |
| Markhams | Liverpool | 1 | 7 |
| Hickton Consultants | Elsecar | 1 | 6 |
| Sda Consulting | Manchester | 1 | 6 |
| Wilkinson Cowan Partnership | Cheadle Hulme | 1 | 6 |
| Conlon Construction | Preston | 1 | 5 |
| Mclaughlin Harvey | County Antrim | 1 | 5 |
| Whiteleyeaves | Manchester | 1 | 7 |
| Termrim Construction | Huddersfield | 1 | 6 |
| Bernard Taylor Partnership | Stockport | 1 | 5 |