NSUK is an outsourced architectural specification consultancy for designers delivering contract and procurement driven specifications and guidance from Outline Stage to Tender documentation across a diverse range of project types.

Working closely and collaboratively with our clients to understand the project, using secure and state-of-the-art delivery software combined with extensive contractual and technical knowledge accrued by being privileged to work with some of the world’s most innovative and exciting designers on a number of truly outstanding signature projects.



Stephen J. Walton MCIPS

Stephen has been operating in Specification Consultancy since 2002 with a preceding career in Construction Procurement for more than 20 years prior.

Stephen’s specification career began with Davis Langdon Schumann Smith in 2002 which included a tenure in Dublin between 2007-2009 running the Specification Department of DL PKS before rejoining DLSS in London shortly before the AECOM acquisition of Davis Langdon in 2010.

In 2013, Stephen joined Schumann Consult and remained there through the merger with RLB (Rider Levett Bucknall) in 2016 becoming a Partner until leaving in April 2018 to start up NSUK Ltd.

Taiwo Odunaike 

Taiwo’s focus on specification consulting commenced since 2005 when he joined Davis Langdon Schumann Smith (later acquired by AECOM) working closely with Stephen. This was preceded by over a decade running refurbishment projects and facilities maintenance management programmes.

Before leaving to join NSUK Ltd in March 2019, Taiwo worked on several UK and overseas projects of varying styles and complexities, designed by several signature architects such as Foster+Partners, Zaha Hadid Architects, Hopkins, WEA, A&M, HB, FCBs, BGY & DSK.

At AECOM, Taiwo was a Senior Specification Consultant, UK lead consultant on CSI (USA specification format) and a key member of the Technical Review Committee. There, he led projects such as FIFA 2022 Al Janoub Stadium Precinct Qatar, KAFD Riyadh Metro Station, National Built Heritage  Centre Diriyah, British Embassy Washington, Dyson Offices UK, Kuwait Int Airport, and Waterloo Int Terminal.



National Specifications UK Ltd are proud to be the vanguard of the National Specifications Group along with The Friday Group LLC whereupon close collaborative working optimises the benefits of knowledge-share and sector experience.

Professional Indemnity

NSUK holds PI insurance – Details available on request

Quality Assurance / Technical Back-up

Milestone proof-reading

Industry memberships – BM TRADA / CWCT / British Library / BSI/ BSRIA