The Naval and Military or In and Out Club is a private members club located in St. James’s Square, Piccadilly. It is a Grade II* listed property, with famous architects Nicholas Hawksmoor and Giacomo Leoni involved with the design of the house. In 2015 London Stone Conservation won the tender as main contractor to carry out the full repair works to the façade and inner courtyard of the club.

The building is a three storeyed terraced town mansion with a classical Palladian facade. The building is constructed of amber stock bricks with stone dressings. Originally a Barbon town house it was remodelled in 1728 following severe fire damage. It is now a prestigious private members club, originally set up for Officers and Members of the British Armed Forces, but now also accepting civilian members.

The project comprised the cleaning, conservation and repair of the stonework; repair and reinforcement of the stone balcony; brick replacement; restoration of the metal railings; replacement of the leadwork and complete redecoration. The Ionic entablature had been covered in numerous layers of paint and had suffered a complete loss of detail and legibility from ground level. This was stripped back to the original stonework, which was found to in fact be Purbeck marble, a very rare example of its use in external architecture of this type. New sections were carefully sourced for the repair and finished with a breathable microporous paint system. As a listed façade, the cleaning of the brickwork was prohibited, therefore all replacement bricks and new pointing were soot washed to unify the façade and maintain the original carbon stained aesthetic.

Through a well-sequenced program and daily communication with the client the building and all of its facilities remained open for the duration of the works, with minimal disruption to the club and its members. London Stone Conservation continue to carry out maintenance works for the club.