At Allan Corfield Architects, we’re passionate about helping people realise their dream of designing and building their own home. That’s why every month we host the Self Build Hour, bringing expert insight from across the industry to inspire and guide anyone embarking on a self-build journey.
This month, ACA architect Jenny Chandela was joined by Mark Millar—joiner, TV presenter, and long-time advocate for the self-build movement—at the National Self Build and Renovation Centre (NSBRC) in Swindon. Together, they explored what it really takes to build with confidence—from finding the perfect plot to choosing the right construction system.
Mark began by emphasising the importance of research. Before the first brick is laid, a self-builder must find the right piece of land—and that means doing plenty of homework. Tools such as Plot Search can help identify available sites, but the key is to look beyond the surface.
“Think about the view, the access, the services, and the planning history,” Mark advised. “Ask yourself if the site inspires you every day—and be ready to walk away if it doesn’t fit.”
He also reminded would-be builders to consider practicalities early on: service connections, soil conditions, and even the local weather can all affect cost and build-ability.
The NSBRC showcases a wide range of modern build methods—from traditional brick and block to timber frame, SIPs (Structural Insulated Panels) and ICF (Insulated Concrete Formwork).
Mark encouraged visitors to explore them all:
Timber frame and SIPs offer excellent insulation and faster weather-tightness, helping mitigate the UK’s unpredictable weather.
Brick and block is familiar and robust but can be slowed down by rain or frost.
ICF and modern timber systems provide strong, airtight structures ideal for energy-efficient homes.
As Allan Corfield later pointed out, “The sooner you can get to wind- and watertight, the quicker your build progresses and the less money you lose on delays or temporary accommodation.”
Knowing your build system—and why it suits your goals—is one of the biggest confidence boosts you can give yourself.
For Mark, success begins with the right professional support.
“Bring your architect on board early. It’s about collaboration—combining your vision with their experience.”
Architects, quantity surveyors, and engineers each play a vital role in ensuring your ideas are achievable, affordable, and meet planning requirements. Once the design is agreed, Mark’s advice was simple: don’t move the goalposts. Late changes on site can cost thousands and cause unnecessary stress.
Confidence in your project grows when you trust your team and your plan.
Mark also discussed windows, cladding, and finishes—not just from an aesthetic standpoint, but from maintenance and performance perspectives. Timber windows, while beautiful, need upkeep; aluminium offers durability and slimmer sight lines; and composite options can balance both.
The same logic applies to external finishes, from brick slips to timber or composite cladding—each must complement its surroundings and suit the level of maintenance you’re prepared to commit to.
Confidence comes from making informed choices that work for the long term, not just on day one.
Energy efficiency and sustainability were strong themes throughout the session. Mark urged self-builders to think about the long-term running costs of their homes, not just the upfront price. “You’re not only investing your money—you’re investing your lifestyle,” he said.
Options like solar panels, air-source or ground-source heat pumps, and high insulation levels may cost more initially but deliver ongoing savings and environmental benefits.
Building with confidence also means building for the future—financially, practically, and sustainably.
For both Mark and the ACA team, one message came through clearly: education is everything. Whether you’re just starting to dream or already have a plot, the more you understand about design, planning, and construction, the smoother your project will be.
Allan Corfield summed it up:
“Take your time with the early stages. Get your site investigations done, review your design, and only move forward when you’re ready. Once everything’s aligned, you can act at pace.”
Visiting the NSBRC, attending home-building shows, or joining one of ACA’s free Self Build Seminars are also excellent ways to build that confidence and knowledge.
If you would like to discuss your project and learn about how AC Architects can support you on your self build journey, get in touch now.