GPU – South Colonnade

  • Client

    Government Property Unit

  • Contractor

  • Value


  • Completion Date

    March 2020

Part strip out and fit out of approx 50,000m2  for 10 individual tenants occupying 11 floors.  Each tenant represented a government department relocating from various sites throughout London.  The CAT B scheme was largely based around a flexible open plan working arrangement with cellular meeting rooms concentrated around central cores.

The Challenge

The main challenge centred around the multiple end users who all had their own design requirements and the 28 sectional handovers required to enable a progressive occupation of the building.  The multiple sectional completions also had to accommodate dependencies from other workstreams within the building.

The Solution

To ensure programme delivery, Overbury agreed a vanilla scheme/cost for each client enabling the floors to commence.  Running concurrently, Overbury agreed a detailed design release programme with the client and consultants which allowed the maximum time to fine tune the design while still achieving client move dates.

The logistical and operational challenges were managed by a detailed risk register which listed all the dependencies and highlighted risks to our client.  This was updated on a weekly basis.  The multiple handovers were managed through a minus 6 week detailed close out programme supported by a robust handover file and agreed procedures.

The Results

The agreed approach of vanilla design/cost followed by enhanced design resulted in a high number of change instructions, partially regarding day two items following occupation.  Overbury allocated a dedicated change manager to the project which mitigated the programme.

The experience the client and consultants conveyed to Overbury was how interactive and collaborative they found working with the project team.  This was partly due to the open plan working office environment they set up for the wider project team.


SME Spend


Added Value


Client Satisfaction

Contractor Performance | Commitments


100% payment within 30 days terms


100% timber responsibly sourced


CCS Score 43/45


20 No of SMEs

47 beneficiaries


Soft landings for handover

Dedicated Overbury Change Manager

On-line portal for notifying any defects with 3 priority categories for response times

SCF Framework Manager

James Wright 


Phone: 07761 330560

Contractor Framework Manager

Alan Smedley


Phone: 07967 686066