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Planet Mark Certification


HBA are proud to announce that we are working with Planet Mark to measure and reduce our carbon footprint and have a positive impact on planet and society. We are committed to sustainability and will be sharing our achievements over the course of 2024.

January 2024

Refurbished timber floors at 140 Wardour St


Our current workplace project in Soho is refurbishing and reusing 6no. floors of existing timber plank flooring. The flooring is being sanded down, repaired, filled and refinished all on site. The project is targeting BREEAM 'Outstanding' and the reduction of waste and re-use of materials is helping with this ambition.

December 2023

Innovative facade solution at Eden, Spitalfields


Our recently completed 60,000sqft workplace project in Spitalfields features an innovative facade design reusing over 75% of the existing building facades. The brief required the existing building to be transformed visually while providing a sustainable solution. 

The original horizontal, metal brise soleil have been removed and a new 'facade' featuring lightweight stone columns and fins bolted back to the building at slab level. These new elements constructed from 20mm thick reconstituted stone create a new vertical emphasis to the facade more closely aligned with the surrounding buildings.


A new top floor extension has been integrated into the new massing although the lower floors of the main south elevation have retained 100% of the existing glazed facade.

Given the tremendous energy and natural resources required to produce new glazing units and the difficulty in recycling old units, the inventive re-use of the glass facades is a huge sustainable positive for the building, while not compromising the aesthetic of the refurbished building.

September 2023

Award-winning CLT extension at 10 Lower James St


HBA designed this project along with structural engineers, Heyne Tillett Steel providing a new duplex office space to the top of the building using CLT (Cross-laminated Timber). The scheme was one of the first in Central London to use the material in this way.


The timber panels were produced by Eurban, sourced from sustainable forests in Eastern Europe. All the panels including the cranked roof sections came to site pre-fanricated and were craned into place allowing the new extension to be constructed and water-tight in less than a week.

The 250mm solid laminated panels were then left exposed on the inside of the building and 'whitewashed' with a flame-retardant finish. Services and cabling routes were carefully designed and co-ordinated with Eurban prior to manufacture to ensure no onsite alterations were required.

Mass timber construction enables us to build buildings with a reduced carbon footprint due to the materials and processes employed. It also enables us to build buildings with a net zero carbon footprint due to the carbon sequestered in the building structure. 

December 2020

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