Robertson was an early exponent of the Norman Revival, designing both St Clement's Church, Oxford[1] and St Swithun's parish church in Kennington, Berkshire[2] (now in Oxfordshire) in this style as early as 1828.

Robertson then moved to Ireland, where he had considerable success and carried out commissions for notable country houses particularly in the southeastern part of the country.

Robertson's buildings include: In addition to numerous major country house commissions, Robertson was also particularly noted as a landscape designer.

His greatest accomplishments in that field were at Powerscourt and Killruddery, both of which capture long-distance views of the Great Sugar Loaf mountain in County Wicklow.

Wells House also has plans of the gardens designed there by Daniel Robertson.