Shepherds Barn, Mark Siddall (LEAP)
Talks and lectures

How to Design & Build low impact buildings – case study discussion & debate

Join us for this joint event with the Chartered Institute of Building, the Institute of Engineers, the Construction Industry Council and Mark Siddall of LEAP architects and engage in a fascinating discussion about the future of construction.

Using the award-winning Shepherds Barn as a case study, architect and Passivhaus Designer Mark Siddall will introduce the RIBA 2030 Challenge.

During the presentation you will discover the strategies and tactics used to address energy in-use, up-front and lifecycle carbon emissions, and how thoughtful on-site management meant zero waste was sent to landfill and only two vans of material went for recycling.

In addition to being the North East's first dwelling to satisfy the RIBA 2030 Challenge it is the region's first Passivhaus EnerPHit PLUS. Furthermore, by reducing energy in-use and generating renewable power, the project achieves ‘Zero Carbon’ status, according to SAP (the Standard Assessment Procedure). It was on this footing that the project recently won four RIBA North East awards, including the top accolade of best building, and the North East Regional LABC Award 2021 for best conversion to create a single new home.

Join us and engage in a fascinating discussion about the future of construction and the tremendous opportunity we have to make a difference.

Please note, this event will be accessible both online and in person at the Common Room, Newcastle upon Tyne.

About the speaker:

Mark Siddall is Director of Architecture and Research at LEAP (

A multi-award-winning architect with over 35 years experience in the construction industry, Mark is one of the pioneers that brought Passivhaus to the U.K. As a leading Passivhaus Designer he has contributed to peer reviewed journals, the training of over 1000 Passivhaus Designers and presented at conferences around the world. He is a technical advisor for both the Passivhaus Trust and the AECB. He is also a trustee of the AECB and co-chair of the RIBA North East Sustainable Futures Forum.

Through his architectural practice LEAP, Mark and his team help self-builders, homeowners and communities create their forever home lifestyle by designing new homes and retrofits which are sensitive to the defining characteristics of the local area and reflect a high standard of architecture, often on complex urban and rural sites and in conservation areas.

Using an evidence-based approach and 15 years’ experience researching and working on Passivhaus buildings, LEAP also provides Passivhaus consultancy and support to aid the design and construction of successful Passivhaus buildings.

You can watch documentaries about some of his projects at