Duncan is a construction specialist who acts across a range of contentious and non-contentious matters.  He is regularly recommended for his expertise in construction law in annual legal publications.  He is a leader in the regeneration and development sectors.  He is described as a "hands-on regeneration expert" by Legal 500 2010 and "refreshingly uncomplicated" and "practical, swift advice with high levels of client care" in Chambers UK 2010.

He is currently working on some of the largest and most complex schemes in the country.