National Audit Office | Wates

Extensive & complex redevelopment and fit-out of the 21,800m partially Grade II listed 1930s offices.

65 weeks
Project period
1.2 million
Man hours
Lost time incidents
BREAAM rating

The National Audit Office (NAO) headquarters is a well-known landmark with its famous central clock tower, art deco design and historical significance.

The building required an extensive and complex redevelopment and fit-out of the 21,800m partially Grade II listed 1930s offices, to ensure a building fit for the future.

The finished scheme provides Cat B offices for 920 staff, a large restaurant and kitchen, meeting rooms, auditorium, plus the restored historic boardroom and original ballroom.

With the heritage of the building at its heart, the challenge was to retain and refurbish key features of this complex and restrained site, while creating a first-class office environment.

Preserving History

Wates pre-construction and value engineering were fundamental in ensuring the sympathetic restoration of this building. The complex internal spacial-fit required was further complicated by very low clear ceiling heights and required Wates in-house design and buildability expertise in leading a comprehensive re-design exercise to successfully ensure the key requirements were met while retaining all the heritage features.

The facades and structural frame were retained with sympathetic repairs to the external stonework and replacement of all windows and doors. Existing heritage timber panelling to the Boardroom and Old Ballroom were restored along with all original marble panelling within the main reception.

"Wates have exceeded expectations on this project; everyone on the team has a can-do attitude and is focussed on achieving the best outcomes. Third party issues have been managed very well including Victoria Coach Station during the delivery of plant and materials which was managed fantastically.
Jim Rickleton
Director General, Finance and Commerce National Audit Office.

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