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LTS Architects ‘hides’ £1.9m house in Knightsbridge conservation area

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Invisible from the street, the two-storey-plus-mezzanine Hidden House has its lower floor at basement level

Created from two former workshop buildings and a retail space, the project involved reworking existing structures and creating a new subterranean living space in the basement. 

The main living spaces are arranged as a sequence of linked open-plan spaces that include a mezzanine study within the roof pitch. 

A new sunken garden and atria provide daylight to the lower level, which contains three double bedrooms, including a large master suite with an en-suite bathroom resting within arched pavement vaults. 

Perspective section

Perspective section

Project data

Location Knightsbridge, London
Type of project Private residential
Client Private 
Architect LTS Architects
Planning consultant Metropolis Planning and Design 
Structural engineer HRW Engineers
M&E consultant SGA Consulting
Quantity surveyor Corrigan, Gore & Street
Planning supervision Metropolis Planning and Design (town planning)
Lighting consultant EQ2 Lighting
Main contractor Broseley
Appointment Private commission
Tender date February 2015
Start on site date June 2015
Completion date November 2016
Contract duration 16 months
Gross internal floor area 200m²
Form of contract JCT Intermediate Contract
Total cost £1.9 million

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