The Longley Place project is a build-to-rent scheme funded by Legal & General. The development, set around a landscaped podium deck, comprises four blocks ranging from 11 to 20 stories.

Located on an industrial site in close proximity to the rail station, the development – built on a sloping site – offers two sub-levels provided by means of a retaining wall which varies in height from 4.5m to 2m. Temporary works wall solution considers sheet piles ground-anchored to free up activities in the heavily constrained site, subsequently replaced by a reinforced concrete retaining wall in the permanent case.

Lowest slab level is home to various plant, back of house and car-parking facilities, whilst the two floors above deliver two levels of office space. Circa 200 residential units are located in the remaining upper floors, catering for a range of bedroom number formats and tenure types.

Key Technical Challenges

  • Basement wall retention system using ground anchors
  • Perimeter columns protruding past slab edge as part of masonry faced detail
  • Determination of weak spots in chalk substrate
  • Careful co-ordination of BWIC on Level 1 transfer slab

Key Innovation

Early detailed slab design attracted savings in slab thickness, thus allowing for additional floor and helped reduced the number of columns.


  • VE to perimeter columns – reducing costs of support bracketry and reducing internal columns
  • Upon appointment, RBG reduced slab thickness by 20%

RBG Value Add

  • Upon appointment, RBG reduced slab thickness by 20%
  • Added one floor to blocks
  • VE to perimeter columns – reducing costs of support bracketry and reducing internal columns
  • Additional fees should have been sought for four month programme prolongation due to delay in getting contractor in contract.
  • Rebar fees from work share partner grossly underestimated; get partner to determine no of sheets and commit to paying for own mistakes.
  • Know contractor’s preferred format for rebar schedules, e.g. separate column lifts
  • MEP engineer tender design was not to high standard; abortive costs leading to Civils redesign

Project Metrics

Project Value:
£80 Million
Year Completed:
Anticipated 2022
RBG Client:
Legal & General

Project Metrics

Services Engineer:
Hoare Lea
Robert Bird Group Services:
Structural Engineering
Civil Engineering
Geotechnical Engineering
Construction Engineering

Project Metrics

Environmental Performance:
• BREEAM Excellent
• HQM Four Star

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