| Curtins Consulting | Liverpool, Cardiff, London | 19 | 16 |
| Ridge & Partners | Woodstock, Theale, Liverpool | 11 | 38 |
| Ove Arup & Partners | London, Cardiff | 10 | 72 |
| Faithful Gould | Epsom, Edinburgh, Leeds | 8 | 44 |
| Ellis Moore Consulting Engineers | London, Enfield, Middlesex | 5 | 5 |
| Robinson Low Francis | London, Hertfordshire, Stevenage | 7 | 14 |
| Currie & Brown | London, Edinburgh | 6 | 29 |
| AECOM | Cardiff, Glasgow, Leeds | 5 | 137 |
| Calfordseaden | Orpington, London | 5 | 20 |
| Wardell Armstrong | Cardiff, Edinburgh, Stoke on Trent | 5 | 17 |
| Pennington Choices | Norcott Brook, Warrington | 4 | 18 |
| Civic Engineers | Manchester, Glasgow | 4 | 4 |
| Ahr Architects | London, Manchester | 5 | 5 |
| Gleeds Cost Management | London, Leeds | 5 | 5 |
| Services Design Associates | Sheffield | 5 | 3 |
| Austin Smith Lord | Glasgow | 5 | 2 |
| Tetra TECH | Leeds, Cardiff | 5 | 5 |
| Atkins | Cardiff, Glasgow | 4 | 128 |
| RPS Consulting Services | Abingdon | 4 | 23 |
| Arcus Consulting | Sale | 4 | 16 |
| Stantec | Bristol, Glasgow | 4 | 15 |
| Michael Dyson Associates | Holmfirth | 4 | 13 |
| Appleyard & Trew | Manchester | 4 | 3 |
| Wilde Consultants | Stockport | 4 | 3 |
| Pegasus Planning Group | Cirencester, Sutton Coldfield | 4 | 2 |
| Axis M&E Consulting Engineers | Nottingham | 4 | 4 |
| Waterman Infrastructure & Environment | Birmingham | 3 | 16 |
| Land Use Consultants | London | 3 | 14 |
| Jones Lang Lasalle | London, Leeds | 3 | 11 |
| Faithorn Farrell Timms | Kent, Orpington | 3 | 18 |
| BDP | Bristol, Sheffield | 3 | 13 |
| Avison Young | Birmingham, Leeds | 3 | 12 |
| Capita Property & Infrastructure | Cardiff, London | 3 | 21 |
| Bruton Knowles | Gloucester, Quedgeley | 3 | 6 |
| John Rowan & Partners | London | 3 | 7 |
| Clancy Consulting | Prestwick, Leeds | 3 | 6 |
| Martin Arnold | London | 3 | 4 |
| David Miles & Partners | Essex, Romford | 3 | 5 |
| Keegans | London | 3 | 2 |
| Ecd Architects | London | 3 | 3 |
| Frankham Projects | Kent, Sidcup | 3 | 3 |
| MLCS3 | Manchester | 3 | 3 |
| Oander | Horley | 3 | 3 |
| Quantem Consulting | London | 3 | 3 |
| Synergy Construction & Property Consultants | London | 3 | 3 |
| Urbanists | Cardiff | 3 | 3 |
| Valuation Office Agency | London | 3 | 3 |
| Aa Projects | Manchester | 2 | 11 |
| NPS Property Consultants | Norfolk, Norwich | 2 | 10 |
| Peter Brett Associates | London | 2 | 8 |
| Identity Consult | York, Sunderland | 2 | 8 |
| Campbell Reith Hill | London | 2 | 7 |
| Mason Clark Associates | Leeds, Hull | 2 | 7 |
| Tully Death Consultants | Forest Row, Forest Row Sussex | 2 | 5 |
| Price & Myers | London | 2 | 5 |
| MLM Consulting Engineers | Leeds, West Yorkshire | 2 | 3 |
| Shape Consulting Engineers | Liverpool | 2 | 4 |
| Nicol Thomas | Birmingham, Oldham | 2 | 3 |
| Davies Maguire | London | 2 | 2 |
| Iesis Special Structures | London | 2 | 2 |
| Jenkins & POTTER | London | 2 | 2 |
| RSK Land & Development Engineering | Cheshire, Cheshire West and Chester | 2 | 2 |
| Walker Associates Consulting | Billericay, Essex | 2 | 2 |
| Walsh Associates | London | 2 | 2 |
| Webb Yates Engineers | London | 2 | 2 |
| Whitby Wood | London | 2 | 2 |
| Pick Everard | Leicester | 4 | 16 |
| Keelagher Okey Associates | Warrington | 4 | 2 |
| Built Environment Consulting East Midlands | Derby | 4 | 4 |
| Quality Engineering Design Consulting Engineers | Loughborough | 4 | 4 |
| TCQ Surveyors | London | 4 | 4 |
| Waterman Structures | London | 4 | 4 |
| WSP Safety | Newark | 4 | 4 |
| Frankham Consultancy Group | Sidcup | 3 | 14 |
| Pellings | Bromley | 3 | 15 |
| POTTER Raper | Beckenham | 3 | 12 |
| Baily Garner | London | 3 | 10 |
| Airey Miller | Sevenoaks | 3 | 13 |
| BPTW | Greenwich | 3 | 6 |
| Capita | Southampton | 3 | 4 |
| PRP | London | 3 | 8 |
| Churchill Hui | Sunbury | 3 | 7 |
| Amr Consult | London | 3 | 3 |
| Archadia Practice London | Hampton | 3 | 3 |
| Edge PS | Nottingham | 3 | 3 |
| Fulkers | London | 3 | 3 |
| Hamson Barron Smith | Norwich | 3 | 3 |
| HKS | London | 3 | 3 |
| Ibis | Henley on Thames | 3 | 3 |
| Johns Slater & Haward | Ipswich | 3 | 3 |
| Macegreen Consulting | London | 3 | 3 |
| Madlins | Woking | 3 | 3 |
| Mcbains | London | 3 | 3 |
| Silver | London | 3 | 3 |
| Woodley Coles | Sandwich | 3 | 3 |
| WSP | London | 2 | 132 |
| Mott Macdonald | Cardiff | 2 | 60 |
| Jacobs | Cardiff | 2 | 62 |
| Savills | London | 2 | 30 |
| Mace | London | 2 | 26 |