Building launches Top 150 Consultants 2026 survey

Building is launching its survey for its annual ranking of the Top 150 consultants for 2026 which offers unique insight and market intelligence on the state of the UK professional services sector.

The annual list covers companies employing quantity surveyors, surveyors, project managers, engineers and architects by fee turnover spanning small, limited companies and partnerships to multinational PLCs. The size of companies stretches from £100,000 to more than £1bn in turnover. The Top 150 also provides a breakdown of the chartered specialists into separate listings by firms employing those specialisms.The online tables are sortable by a range of metrics, including fee income, staff and number of offices.

The survey includes sentiment questions that will cover market conditions, skills, the growing use of artificial intelligence in construction, IT security and political and policy conditions currently facing the sector.

Building editorial director Chloe Mcculloch said: “The Top 150 consultants listing offers vital information and insight into the sector – particularly in such uncertain economic and political conditions that we face.

“We rely on as many firms as possible to participate and put themselves forward to give as clear a picture of the sector as possible. So please do make sure you take part this year regardless of your size.”

Access the survey here

The deadline for completing the survey is Friday 19 June. Companies can start filling in the survey and return to complete it at a later date ahead of the deadline.

Last year, the Top 150 Consultants 2025 league table was topped by AtkinsRealis and Mott MacDonald – these firms were followed by WSP, Aecom and Arcadis in third, fourth and fifth spots respectively. The listing also includes the top 50 architects, engineers, project managers and surveyors as well as accompanying analysis articles

This year’s league table will be published online and in print in the autumn.

For companies wishing to participate this year attached below is the list of questions that firms will need to fill in.

Any questions about entering the Top 150 Consultants league table, please email top150@assemblemediagroup.co.uk.