Virtual Exhibition


Thank you for visiting our virtual exhibition. We are excited to share with you our proposals for 19 Mallord Street. In normal circumstances, we would have loved to hold this exhibition on site and meet you in person, however in light of the Covid-19 outbreak, we have decided to proceed with our consultation virtually. The safety of our residents and our team is the top priority, and by holding a virtual exhibition, we can ensure that neighbours and residents are properly consulted and continue to have the opportunity to share their thoughts and influence the development in a simple and responsible way. We are fully aware of the importance of community input when submitting proposals, and therefore, your feedback is extremely valuable to us. As you browse through the virtual exhibition, you will notice a number of prompts that will ask you to share your thoughts and opinions. We kindly ask you to take the time and complete and submit your answers to these questions. There will also be an opportunity to share additional comments at the end of the exhibition. We intend to submit our planning application to the Royal Borough of Kensington and Chelsea Council in the summer. We hope that you enjoy the exhibition.

You are in step one

The Site

19 Mallord Street is a magnificent, five-storey building situated in the heart of Chelsea. The building once famously housed the Flaxman telephone exchange, however, as times change, telephone exchanges no longer require large spaces and as such, the building has remained vacant since it was vacated the premises in late 2018.

Click the above window to begin navigating through the current interior of 19 Mallord Street.

Bringing 19 Mallord Street back into use has been Sloane Stanley’s priority for some time and the Estate is committed to doing so in a way that is sympathetic to the surrounding area and gives careful consideration to local residents. Alongside finding the right use for 19 Mallord Street, we have also focused our efforts in finding an occupant who shares Sloane Stanley’s dedication to enhancing Chelsea’s local offering. For this reason, we have chosen Third Space, a luxury health club provider with a proven track record across London. We are convinced that their top-quality service will be an asset to the local area and to Chelsea more widely, whilst respecting those who already call it home.

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The Prospective Occupant: Third Space

Third Space are London’s high-end health clubs; individual in style, bound by a common philosophy: to provide outstanding fitness spaces that members feel are their own. Founded in 2001 with its first club on the Crown Estate in Soho, the business has grown to six prestigious locations in central London: Canary Wharf, The City of London, Tower Bridge, Islington, Soho and Marylebone. Ranging in size from 14,000 sq ft (Marylebone) to 100,000 sq ft (Canary Wharf), all of the clubs have a state-of-the-art fitness and training offering at their heart, centred around group classes, top quality equipment and personal training. The clubs also have swimming pools, best in class changing facilities, and a healthy grab and go café called Natural Fitness Food, as well as facilities which vary from site to site including spas, medical centres, climbing walls and altitude chambers. The clubs operate on a membership model and attract a broad demographic range with their interest in health and fitness in common. The split between men and women is broadly even. The Third Space brand is steeped in training expertise combined with a high service environment, providing a holistic fitness and wellness experience. The business is a privately owned, UK business. The management team have very extensive experience of building and operating clubs and are all based in London. For more information about Third Space, please visit our website at

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The Vision: Exterior

The large and spacious nature of 19 Mallord Street lends itself perfectly to a high-end health club, meaning that no major alterations will be made to the exterior of the building, thus ensuring that the building is protected and that any possible disruption to our neighbours is minimalised. In order to make the building more energy efficient and to further increase the containment of noise, we intend to upgrade the windows, most likely through adding additional glazing internally – enabling the existing windows to remain. With regard to the roof, there is no intention to use the roof as part of Third Space’s facilities, nor will there be any material change to the roof, other than updating the plant equipment. There will also be no additional floors or roof-top extensions.

The Vision: Interior

With regard to the interior of the building, the following drawings detail the indicative floorplans for Third Space’s proposed use of each floor:

Swimming Pool We are intending to provide a pool in the basement and are currently doing the necessary testing and evaluation of the required excavation works to create the pool shell. It will be ozone filtered, which means there are no typical “pool smells” and is also healthier and kinder for the skin of our swimmers.

Crèche We will be making a small, squash court sized, extension to the rear of the building in the courtyard to house a crèche. The extension will be single storey and it will not be visible from anywhere outside of the property itself given the height of the surrounding walls at the rear. The crèche is an amenity which we think will be popular with members so they can train or relax whilst their children will be looked after. The capacity of the crèche will be around for 14 children at any one time.

Courtyard A private courtyard to the rear of the building will be used for loading and unloading our two daily service deliveries of towels and cold food.

Concierge Lounge and Natural Fitness Food Members will enter the building via the larger gated entrance, and will be greeted by Third Space’s concierge. This lobby area will feature a food and juice bar, where members will be able to fuel up before or after their workout, as well as a small retail space where gym kit will be on offer to members.

Training Space World-class equipment will enable members to train with precision. A personal training service will also be on offer to advise and help members reach their goals.

Third Space Studios Members will be able to choose from an array of specialist classes, ranging from serene yoga sessions to spin classes.

Precedent image of the swimming pool
Precedent image of crèche
Precedent image of concierge lounge
Precedent image of concierge lounge
Precedent image of changing room
Precedent image of training space
Precedent image of yoga studio
Precedent image of cycle studio

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Transport and Access

Sloane Stanley has focused their efforts on bringing forward a use that respects the local area and has minimal impact on those who also call Mallord Street home. Having talked to local stakeholders, we feel that the use of a high-end health club addresses much of the key concerns expressed in relation to transport and access.

As most Third Space clients walk or cycle to their health club, we do not intend to provide car parking for members. Cycle parking, however, will be provided on-site.

Given that client use is spread throughout the day at Third Space’s other London clubs, we do not expect the Mallord Street club to differ. This means that unlike most other uses, Third Space will not attract mass departures and arrivals that result in a lot of people in the surrounding streets at once. Furthermore, the spacious and welcoming concierge area, which includes a small seated area, will mean that people will not have to linger outside the building for any reason.

Third Space’s servicing requirements only require two service deliveries a day: towels and cold food. Compare this to a hotel or even residential units, which would have constant activity, day and night. These deliveries, carried out by a small white van, will be scheduled to avoid peak times such as school drop-off and pick-up, and the private courtyard to the rear of the building will be used for loading and unloading, avoiding any disruption to local residents on Mallord Street.

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Consultation Timeline

Consultation Sloane Stanley began consultation with local societies, residents’ associations and stakeholder representatives from the Royal Borough of Kensington and Chelsea Council in January 2020. We have maintained dialogue with members of the community, gathering feedback throughout to help inform our plan. We truly believe that extensive consultation and open dialogue with the local community will enable us to arrive at the best possible proposals for 19 Mallord Street. Therefore, the feedback that you submit within this virtual exhibition will be feed into our proposals wherever possible and will serve to shape our plans. It is our intention to formally submit our application to the Royal Borough of Kensington and Chelsea Council this summer. However, we wish to continue engagement with the community through to and beyond the point of determination. Should you have any specific questions not addressed by this exhibition, or should you wish to simply speak directly to a member of the project team, please do get in touch via the details included on this website and we will be delighted to hear from you.

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The proposal for a school was turned down. Whilst we feel it was a good use of the site, we do understand why it was refused. Firstly, the importance of engaging correctly with the local community. Secondly, to understand the concerns of the local community and to engage with them in earnest. Thirdly, to recognise the key issues and ensure that they are addressed.
Whilst concerns of overlooking only impacts on a few, we do not underestimate the importance of their privacy and are determined to maintain good relations with our neighbours. No great changes to the height or frontage of the building are to be made, and as such there will be no increased overlooking. But unlike the telephone exchange, Third Space will not be open 24 hours a day, 365 days a year and they will be adding measures to restrict any overlooking.
We understand that one of the main issues that could affect our neighbours is traffic. With regards to traffic, there are few uses which generate as little traffic as we do. We have two deliveries per day: towels and cold food. We will schedule these to avoid peak times such as school drop-off and pick-up, and we can use the private drive underneath the building for loading and unloading. We expect the significant majority of our members to come by foot, bike, public transport or in some cases taxi. None of our current clubs have any parking provision, nor will there be any parking provision at 19 Mallord Street.
Concerns over noise are understandable, given that exercise often entails loud music. However, the old telephone exchanges were incredibly noisy themselves and this building was purpose built to contain noise. Indeed, when the telephone exchanges were in operation, they couldn’t be heard outside. This will not be any different with the change of use. Even so, Third Space have a lot of experience in dealing with this problem given that some of their clubs are located in residential buildings. They have conducted an acoustic survey of 19 Mallord Street and will be installing further sound proofing as well as upgrading the windows, making the containment of noise even better than it is now.
Residential or social housing is certainly favoured in some quarters and the Estate owns many flats as well as operating a very successful House in Multiple Occupation (HMO) on the Fulham Road. However, the Estate believes in a diverse Chelsea and wants the use of this building to help achieve this. We think that simply turning every commercial building into residential will destroy the varied landscape that exists in Chelsea. We shouldn’t forget that residential use is not without problems. It would bring additional pressures around parking and taxis and deliveries also cause more traffic. Furthermore, a residential use also entails increased overlooking onto neighbouring properties and if anyone were to go for residential, it would make sense to demolish the building and start again with additional floors and roof terraces.
We intend to open from 6am to 11pm Monday to Friday and 8am to 8pm at the weekends. At the beginning and end of our days, we tend to have members arriving and leaving in small numbers. The majority of members start to arrive from around 7:30am and have left by around 9:30pm. Unlike most uses there are no mass arrivals or departures of people as they arrive in ones or twos throughout the day. With regards to noise we are very experienced at designing and fitting out buildings that we occupy to ensure there is no noise that affects our neighbours. We currently operate in buildings that are next to, above, or below residential dwellings and offices without problems. We have already undertaken acoustic testing of the building so we can design our club accordingly.
The construction period is expected to take approximately 9 months and the very significant majority of the works will be to the interior of the building. A robust construction management plan will be agreed with RBKC as part of the planning application and the project team is committed to ensuring that this is adhered to.
Obviously, we expect Third Space to be successful and for them to be in place for a long time to come. Third Space are an experienced company with six other health clubs across London, most of which are larger than 19 Mallord Street. They have done their research and are confident in making what will be a major investment in Chelsea. However, the Estate has provisions in place within our leases that minimise the possibility of adverse changes. We include strict usage clauses to ensure that the use remains as agreed and we restrict alterations to guarantee that the building is protected. Finally, we include pre-emption clauses so that we can step-in if the tenant changes.

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Thank you very much for visiting our virtual exhibition. We hope that you found it to be an informative and useful experience. The deadline for feedback to our Virtual Exhibition has now passed. However, if you wish to provide further comments or have any questions, then please feel free to contact us via the details provided It is our intention to submit a planning application at the beginning of the summer. We are committed to working in partnership with local residents and the feedback received as part of this exhibition will help us as we continue to develop the scheme. Thank you once again for visiting our virtual exhibition and submitting your feedback. We truly believe that our plans to bring 19 Mallord Street back into use will bring new opportunities to Chelsea and we hope that you are just as excited as we are with the emerging proposals.

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