10 King William Street
London, EC4N 7TW
Please contact us for price
- Space Available45,000 - 144,400 ft² / 4,181 - 13,415 m² (approx. 418 - 1,341 desks)

Jason Collier
Director – Central London Office Agency
Agent details

Matthew Mycock
Director – Office Agency
Agent details

Katie Sommer
Director – City Agency
Agent details
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Summary
140k sq ft prime office space above new Bank Station entrance. Beautifully designed, highly sustainable. Available Q4 2026.
- Designed by Fletcher Priest Architects and delivered by Helical plc and Places for London
- PC Q4 2026
- 7,300 sq ft of private and communal terrace space with fantastic City views
- Extensive amenity provision including wellness suite and two business lounges
- Fully electric building
- BREEAM outstanding
- EPC A
- NABERS 5*
- WELL Platinum
- 25% biodiversity net gain
Description
10 King William Street is a premium 140,000 sq ft office development located directly above Bank Underground Station in the heart of the City of London. This joint venture between Helical plc and Places for London will deliver an exceptional workspace across ground, mezzanine and seven upper floors, and is available Q4 2026. The Fletcher Priest designed building will provide best-in-class space with market-leading sustainability credentials including BREEAM Outstanding, WELL Platinum, NABERS 5* and EPC A ratings.
Sustainability
10 King William Street sets a new benchmark for sustainable office development in the City of London, with market-leading environmental credentials designed to minimise carbon emissions whilst maximising occupier wellbeing and comfort.
TARGET ACCREDITATIONS
BREEAM Outstanding - Achieving the highest standard for sustainable building design and construction
WELL Platinum - Prioritising occupier health and wellbeing through evidence-based design
NABERS 5* - Demonstrating exceptional operational energy performance
EPC A Rating - Delivering outstanding energy efficiency in operation
ENVIRONMENTAL PERFORMANCE
The building adopts an all-electric approach, eliminating gas consumption entirely and minimising operational carbon emissions. Smart building technology seamlessly integrates with intelligent design to optimise energy performance, whilst extensive sensor networks monitor real-time building conditions to enable truly sustainable occupation.
BIODIVERSITY & COMMUNITY IMPACT
In line with Places For London's Sustainable Development Framework, 10 King William Street delivers a 25% biodiversity net gain, contributing positively to local ecology through thoughtful landscaping and green infrastructure. The development prioritises inclusive design and community engagement, enhancing the surrounding environment whilst supporting local biodiversity.
CONSTRUCTION STANDARDS
Working to stringent sustainability targets, the development minimises embodied carbon and construction waste through the use of recycled and sustainably sourced materials wherever possible. The building combines cutting-edge environmental systems with a 60-year façade design life, ensuring long-term performance and reduced lifecycle impacts.
SMART TECHNOLOGY INTEGRATION
Advanced building management systems provide granular control over heating, cooling, lighting and ventilation, enabling personalised comfort settings whilst optimising energy consumption. The bespoke building app puts system control directly in occupiers' hands, supporting both sustainability goals and user experience.
Accommodation
Energy rating
Location
Agents

Jason Collier
Director – Central London Office Agency
Agent details

Matthew Mycock
Director – Office Agency
Agent details

Katie Sommer
Director – City Agency
Agent details
Disclaimer
JLL for themselves and for the vendors or lessors of this property whose agents they are, give notice that:
- The particulars are set out as a general outline only for guidance and do not constitute, nor constitute part of, an offer or contract;
- All descriptions, dimensions, references to condition and necessary permissions for use and occupation, and other details are believed to be correct, but any intending purchasers, tenants or third parties should not rely on them as statements or representations of fact but satisfy themselves that they are correct by inspection or otherwise;
- No person in the employment of JLL has any authority to make or give any representation or warranty whatever in relation to the property;
- Any images may be computer generated. Any photographs show only certain parts of the property as they appeared at the time they were taken;
- If the Property is in Scotland, this correspondence is expressly subject to completion of formal legal missives in accordance with Scots Law.
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