Discover the “Forever Home Lifestyle”
The Forever Home Lifestyle is a framework you can use to make informed intelligent decisions about your home.
Meet Your Architect
Hello,
I'm Mark Siddall
As an architect having worked in the construction industry for almost three decades, I've discovered three major problems:
- 1Because of silly mistakes, the houses and communities where we live - and the new ones housebuilders are creating - are not fit for purpose.
- 2Self-builders, homeowners and communities who desperately want a better lifestyle, don’t know how to commission an architect or a design team.
- 3Not every project starts with the knowledge, understanding and experience that's needed to design and build a high performance homes that provide unrivalled comfort, control and contentment.
To help address these problems I created the Project Priority Packs®. The process of completing a priority pack is dedicated to helping you find your feet, reducing risk and getting your project on the right track.

WHO workS with us?
Self-Builders:
Want to create your forever home by converting a barn, or starting from scratch?
Home Owners:
Need to upgrade your house so that it'll work for your changing lifestyle?
Communities:
Want to live differently and with a shared sense of place and purpose?
Passivhaus Heros:
Want a Passivhaus and need of support from an experienced Passivhaus Consultant?
about us
We use our experience to create yours
LEAP is the architectural practice where people come for expert design, advice, support, and guidance - so they can make informed intelligent decisions about the kind of house and community where they want to live - as well as benefiting from exclusive training events and the opportunity to build a relationship with true professionals.
There are hundreds of architectural practices out there. But, I've made it my priority to make LEAP the one place where there's no drama, no complaining and no ego - just a relentless focus upon creating the kind of home you want and need. We're open this week. You can start here today or register for a free consultation call for when we next open!
approach
Discover a different way of doing things
According to Einstein, insanity is doing the same thing again and again, and expecting a different result.
Unlike other architectural practices, LEAP uses a rigorous, research led, evidence based approach - the EROS Method.
The research undertaken helps clients get better buildings and helps us educate and transform the construction industry.
Success Stories
What our clients say about us
Ask the people we work with about their experience and each story would be different — but with a common thread running through them. Very often, life-changing results.
Mark has certainly lived up to his reputation. He truly cares. His diligent support has helped me overcome some significant challenges and to achieve full Passivhaus certification.
Mick Woolley
Larch Corner
Certainly not cheap, but very definitely worth it. One of the best investments we made. Mark helped us reduce risk, save time and stick within our budget.
Trevor Gospel
Steel Farm
We were just saying the other day how fortunate were. We've enjoyed working with Mark. He's always quick to respond. Professional and approachable. It's been a rewarding experience.
Helen Hardill
Preston Springs Garth
These bungalows are beautiful, we haven’t had our heating on yet! My husband was always cold before we came here.
Rhoda Hughes
Racecourse Estate
There’s nothing at all that we’d change about the house because we got exactly what we wanted. ...Now we’re finally living in a cosy home, we’re not going anywhere!
Trevor Gospel
Steel Farm
We are really happy here. Designing the house with Mark was fun. It was challenging at times - but in a good way. Now we're in, we love it and the kids love it. It's a great family home.
Richard Hardill
Preston Springs Garth
Mark is one of the pioneers to introduce Passivhaus to the UK. His experience and research makes him one of the UK’s most skilled and knowledgeable Passivhaus Architects.
Prof. Wolfgang Feist
Passivhaus Institute
It was clear when I met Mark for the first time that he has a true passion for his work. It has been a joy to work with someone so committed and knowledgeable.
Prof. David Johnston
Leeds Beckett University
Mark takes a highly analytical and technically expert approach to his work, and is one of the most knowledgeable people about building performance that I’ve ever met.
Jon Bootland
CEO, Passivhaus Trust
Mark's pragmatic attention to detail was very reassuring. Mark consistently helped to minimise design risks and value engineer the project.
Steve Dawson
Seddon Construction
The exceptional standard of construction documents definitely saved the client money.
Joe Dixon
J.D. Homes
Mark's technical knowledge is breathtaking, and importantly for me, he also has an eye in what it takes from a construction perspective.
Allan Thompson
Gentoo Group
Mark helped us mitigate any potential build issues. Regular inspections proved invaluable as the scheme achieved the required air-tightness and certification first time.
Anthony Kavanagh
Keepmoat
Without Mark's input we would have suffered unnecessary costs, delays and frustrations.
Martin Hodgekiss
Keepmoat
Mark's timely input helped us minimise defects and enabled us to avoid the need for expensive repairs at the end of the project.
Steve Dawson
Seddon Construction
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