Allan Corfield Architects

Since 2009 ACA, have been helping self-builders design their dream homes. We have worked on over 300 projects across the UK, from small extensions to large family homes.

All of our designs result in low energy eco homes which are built around the Fabric first approach. Utilising modern methods of construction such as Structural Insulated Panels (SIPs) and Insulating Concrete Formwork (ICF).


We are an RIBA Chartered Practice serving the entire UK, through our presences in Fife and Swindon. Our gifted team of 15 are led by Architect and self-build expert Allan Corfield. As well as running ACA, Allan also speaks and writes for Homebuilding & Renovating Magazine – giving talks across the UK on low energy homes.

The dedicated team at ACA love designing new homes and seeing these designs, through the construction phase into completed homes.

ACA have been shortlisted for numerous industry awards, including best architect, best eco home and recently won Best SIPS Home at the BuildIt Awards.

We are Certified Passive House Designers and always use low energy Fabric First design principles.


Low energy design is at the heart of everything we do, and we not believe that it should cost you the earth, just to save on your future heating costs. We should all be comfortable in our own homes. We design around the Fabric First principles, ie we invest in the forever fabric of the building, then we worry about the low heat demand which your renewables should provide.

We will also design your home to the architectural style which suits you and the site. We are used to working with fixed construction budgets and pride ourselves on how efficient and buildable our designs are.

Initially we complete a free consultation, which can be over the phone (or skype, zoom etc) or in person – either at your home or chosen site. From this initial meeting, we both need to be comfortable that working together is going to work. We will also try to understand, why, what and how you want to build your dream home.

Once we have all of the information required, we will provide you with a detailed fixed cost fee proposal. This outlines all of the services we suggest, timescales and a fixed cost (no percentage to build cost at ACA).

ACA will guide you through the process from initial design to obtaining the relevant Planning & Building Regs approval and then onto site.

We utilise cutting edge 3d modelling software, to make it as easy as possible for clients to visualise their future home. This can be as simple as emailing a standalone 3D file, which can open on your laptop or iPad. Or, at our head office we can invite you to spend hours walking about your future home in full movie quality Virtual Reality.

One thing which differentiates ACA from all other architectural practice is our commitment to education. Over the past 4 years through our blog and ebook , we have helped educate and support 10,000’s of would-be self builders.


Jayne & Allastair Lewis

“They supported us through a lengthy negotiation with Planning and with suppliers. Being the novices we were, this was crucial to the successful outcome of our project. Ultimately, we got exactly what we wanted. The house has been much admired, and we are very proud of what we achieved. A great party house!”

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