Commercial, Mixed Use

Conduit Street, London

49 Conduit Street is a prestigious 42,894 sqm2 mixed use development located in the heart of Mayfair.

Conduit Street provides space for retail premises on the basement, ground floor and first floor levels, with prime high specification office space above. The basement also houses various plant and equipment to serve the building.

The previous premises were demolished down to basement level to make room for the brand new development comprising, ground floor, six storeys, a screened roof plant enclosure and a green roof.

This project is truly unique. The impressive facade of the building incorporates handmade glazed ceramic tiles in complementary black and white, an idea formed and executed in a collaboration between EPR Architects and Kate Malone Ceramics.

Key Data

EPR Architects

Aerium and Terrace Hill Group plc

Capita Symonds

Main Contractor:
McLaren Construction

Installer/EOS Client:

Steel Framing Systems Supplier:

Materials / Type of System:
EOS oversail system, bracketry and 150mm section sizes for basement and lower floors.


The construction materials included steel frame provided by EOS  and Reinforced Concrete (RC) cores. In total Conduit Street has 1600m2 of the EOS SFS over sail system.

EOS utilised their unique over sail system and bespoke bracketry to overcome onsite challenges such as slab and beam fixing arrangements. This also ensured the projecting windows designed to over sail the pavement on Savile Row were achievable.

The EOS team also used their larger 150mm section sizes for the basement and lower floors to optimise larger spans.


Conduit Street boasts impressive sustainability credentials. With the site located in the Mayfair Conservation area, this was crucial to the brief.

The project has achieved a BREEAM ‘excellent’ rating, influenced by the projects Photovoltaic panels, Green Roof, Micro-CHP led domestic hot water and a highly efficient VRF air source heating and cooling system.

The thermal performance of the fabric and carbon emissions reduction of the building exceeds approximately over 20% on Part L requirements.

Reduction of carbon was a key consideration for the build. This led to the design and build of a dedicated bicycle entrance and lift, allowing cyclists to access the building easily and store their bicycles in a safe and secure unit. The site also provides showers, lockers, changing areas and drying rooms for cyclists.

Conduit Street has also gained an EPC ‘A’ Rating, demonstrating the energy efficiency of the building fabric, heating, ventilation, cooling and lighting systems.


EOS are proud to have designed and custom manufactured the steel framing systems for this project. Conduit Street is a truly inspirational example of how architecture and art can work together to create a fully functional yet aesthetically phenomenal facility. Conduit Street will continue to inspire for years to come.