Arbor Consulting client list includes:
- Belfast City Council
- Derry City Council
- Armagh City, Banbridge & Craigavon Borough Council
- Fermanagh & Omagh District Council
- Newry Mourne District Council
- Ards & North Down Borough Council
- Causeway Coast & Glens Heritage Trust (Dark Hedges)
- NI Housing Executive
- Greenmount College, Antrim
- Western Health & Social Care Trust
- Ulsterbus
- Ulster Wildlife
- Armagh Cathedral
- The National Trust (Castleward & Mountstewart)
- Northern Ireland Electricity (NIE)
- Woodland Trust
- Irish Prison Service (Castlereagh, Roscommon)
- Gormanston Castle, Co. Meath
- Sligo County Council
- Friends School, Lisburn
- Carnfunnock Country Park (Hall, Black, Douglas)
- Amey
- Farrans
- Graham Construction
- Neptune Group
- Newpark Homes
- Taggart Homes
- Cushendall Golf Club
- Dungannon Golf Club
- Coleraine Institute
- St. Josephs Grammar School, Donaghmore
- Dalriada School, Ballymoney
- Inchmarlo Prep School
- Hazelwood Primary School, Newtownabbey
- Inset Architects, Belfast
- RPS Architects
- KJS Architects, Derry
- McGirr Architects, Derry
- Matt & Lee Kennedy, Planning Consultants
- Bell Architects
- Strutt & Parker Architects, Scotland
- Park Hood Landscape Architects