Construction information
Minismising construction impact
We recognise the need for the works to be carried out in a manner that limits the day-to-day impact on our neighbours. To help achieve this, a series measures are proposed, including:
- Considered timing and routes for construction vehicles, ensuring safe access and minimum disruption to the local community.
- Retaining full access for deliveries and collections to and from our neighbours.
- Continuous monitoring of noise, dust and vibration levels.
- Erection of scaffolding and safety hoarding around the sites.
- Regular communications from the project team to ensure the local community are fully informed of upcoming works.

Site activity: Monday 15th September – Friday 26th September
40 Pelham Street
Works happening in the refurbished building:
- Ongoing cleaning and restoration of the historic brickwork along the retained Pelham Street façade.
- Commence installation of the new windows.
- Alterations to the east façade.
- Final demolition work to be completed by the end of September.
Works happening in the new building:
- Continue pouring the foundations to support the extension of the building.
- Continue installation of the cross laminated timber frame.
80 Pelham Street
- Construction of the basement core continues.
- Installation of reinforcement to existing piles – due to complete mid-October.
- Excess concrete removal from piles in progress – due to finish by the end of September.
- Final basement excavation beneath logistics slab ongoing.
- Waterproof membrane installation in basement underway.
- Installation of propping to provide temporary structural support.
- Demolition of the eastern retaining wall expected to be complete by the end of September.
Managing traffic and deliveries
The footpath outside 40 Pelham Street is currently closed to pedestrians from Monday morning to Friday evening until mid-December. The closure is necessary to enable the team to safely restore the historic brickwork and install new windows. An alternative pedestrian walkway has been set up in the pitlane in front of the site, along the Pelham Street façade, which is clearly signposted. Thank you for bearing with us.
Working hours
Both sites will be adhering to the core working hours agreed with RBKC, which are:
Monday to Friday: 8am-6pm
Saturday, Sunday and Bank Holidays: No noisy works without prior approval from RBKC
Deliveries: 9:30am-4:30pm

Managing traffic and deliveries
A one-way system is in place along Pelham Street to help facilitate an on-street loading bay for construction vehicles. The system is in operation from Monday morning to Friday afternoon and the street reverts to two-way traffic at the weekend.
The diversion route includes:
- One-way traffic along Pelham Street travelling from South Kensington Station to Brompton Road (shown in blue on the map).
- No entry to Pelham Street from Brompton Road – vehicles are diverted north to the A4 (shown in green on the map).
- Buses using Brompton Road avoid Pelham Street and instead turn right onto Sydney Place (shown in orange on the map).
There is signage in key locations to direct traffic, which clearly indicates where access is reserved for residents only.
Road diversion map

Both sites have been registered with the Considerate Constructors Scheme; a national initiative set up by the construction industry
to implement a code of considerate practice designed to encourage best practice beyond statutory requirements.
Construction of new office buildings at 40 and 80 Pelham Street
In November 2021, our proposals to redevelop the two sites were approved by the Royal Borough of Kensington and Chelsea (RBKC).
The Wellcome Trust has a long-standing history in South Kensington and will continue to be a part of the community for years to come. We are therefore committed to delivering these developments sensitively and with respect to our neighbours.
Find out about what’s happening on site:.
- Weekly construction updates to provide an overview of key works happening on site. Please click here to sign up to updates.
- Bi-monthly construction meetings to provide an update on forthcoming works. Sign up here to join the mailing list to receive invitations.
- Bi-monthly newsletters for neighbours with information on site activity and community engagement.
- Site notice board detailing the works taking place and key contact details.
Bi-monthly construction meetings
You can find out more about the programme of planned works at our bi-monthly construction meetings where you will be able to ask any questions you may have.
A link to the previous meeting notes can be found below.
Bi-monthly newsletters
You can find a copy of our latest bi-monthly newsletter by clicking the link below.

Aerial view of 63-81 Pelham Street