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Northline Studio

Ravenscroft Civic Rooms

A set of public rooms inserted into a 1960s municipal block, replacing a sealed ground floor with a covered street that stays open when the offices above are shut.

Location
Sheffield
Year
2024
Type
Civic
Client
Sheffield City Council
Gray concrete building photographed against an open sky

The original building did what a lot of 1960s civic architecture did: it put the public counter behind a revolving door and everything else behind a card reader. By the time we were appointed, the ground floor had been dark for six years and the building was widely read as closed even on the days it was open.

Our brief was to reopen the plinth. The strategy was to stop treating the ground floor as an entrance to the offices above and start treating it as a piece of the street that happens to have a roof.

Cutting the plan open

We removed roughly a third of the ground-floor slab edge and the entire western core wall. That sounds violent, and the structural engineers were initially unenthusiastic, but the frame is a generous 1960s concrete grid with far more capacity than its current loading requires. Once we could demonstrate that the transfer structure had headroom, the argument moved from whether to how much.

What the removal buys is a diagonal. You can now see from the market square through the building to the churchyard behind it, and that sightline does more for the building's reputation than any amount of signage.

A civic building earns its adjective at the ground floor. Everything above it is just offices.

Materials that take a beating

The palette is deliberately short: board-marked concrete where we cast new, Douglas fir where people touch, and a single terrazzo floor that runs from the square through to the rear door without a threshold.

We specified the terrazzo with a much coarser aggregate than the client's technical team wanted. The fine mixes look immaculate for eighteen months and then show every repair. The coarse mix looks worn from the day it is laid, which means it never starts looking worse.

What we would do differently

The acoustic performance of the covered street is the compromise we still think about. A hard-surfaced room with a glazed roof and a public entrance at either end was always going to be lively, and the perforated soffit we added late in the design does about two-thirds of the job. If we had held the acoustic strategy at concept stage rather than treating it as a finishes problem, we would have shaped the roof rather than lined it.

Specification
Status
Completed 2024
Area
2,140 m²
Procurement
Two-stage design and build
Structure
Existing RC frame, retained
Contractor
Kelder Construction
Awards
RIBA Yorkshire, shortlisted
Gallery
Curved stainless steel panels on the Walt Disney Concert Hall in Los Angeles
A building reflected in a still body of water
White concrete building under a blue sky during daytime
Gray concrete building under a blue sky during daytime
A tall building with a clock set into its side elevation
White building structure with blue glass windows
A river running through a city between tall buildings