SEC1 Compliance & Energy-Efficient Homes in Cornwall
Building the Future: How Cornwall’s SEC1 Policy is Redefining Energy-Efficient Homes
Guy Martin’s recent Channel 4 programme House without Bills highlighted an important reality: the current Building Regulations, while helpful, don’t go far enough to create truly energy-efficient homes. Many homeowners struggle with high energy bills, uncomfortable indoor temperatures, and inefficient designs, all problems that could be avoided with the right planning and expertise.
For those building in Cornwall, there’s good news. Cornwall Council’s SEC1 policy is setting a new benchmark for energy-efficient homes, helping you build a home that’s not only comfortable and cost-effective but also future-proof and environmentally responsible.
Why Standard Building Regulations Aren’t Enough
Most people assume that meeting the minimum building regulations guarantees an energy-efficient home. In reality, standard requirements often fall short when it comes to:
• Insulation quality – ensuring walls, roofs, and floors retain heat efficiently
• Airtightness – preventing drafts and heat loss through gaps and joints
• Heating and energy systems – using modern, low-energy solutions to maintain comfort
This is why homes built to standard regulations can still be expensive to run and uncomfortable to live in, especially in Cornwall’s variable climate.
Cornwall’s SEC1: Going Beyond the Minimum
Back in 2019, Cornwall Council declared a climate emergency and committed to taking meaningful action. Their solution? SEC1 a planning policy that sets strict maximum energy use targets for new build homes, aligning with some of the highest standards for energy performance, similar to Passive House certification.
Officially adopted in 2023, SEC1 ensures:
• Homes are highly energy-efficient and comfortable year-round
• Water usage is minimised and monitored
• Renewable energy options, such as solar panels and battery storage, are integrated for 100% on-site energy regeneration
This means every new home built in Cornwall is designed to be low-energy, sustainable, and ready for a greener future.
How We Support Your Project
Building an SEC1-compliant home can seem daunting, but that’s where we come in. Our team works with homeowners and builders throughout every stage of the process, ensuring your home meets Cornwall’s high standards without compromising on design, comfort, or budget.
Planning Phase
• Guidance through the planning process: We simplify technical jargon and help you understand SEC1 requirements.
• Practical advice: Identify the measures necessary for compliance and understand their financial and design implications.
• Early integration: Incorporate energy-efficient principles into your project from day one, avoiding costly changes later.
Design Phase
• Detailed design reviews: Optimise your building for energy efficiency and comfort.
• SAP assessments: Model your home’s energy performance to ensure SEC1 compliance before construction begins.
• Specification & modelling: Establish U-values, window standards, airtightness targets, and dynamic thermal performance to mitigate overheating risks.
• Water efficiency calculations: Ensure compliance with SEC1 water use requirements.
• Renewable energy advice: Evaluate solar, battery storage, and other systems for on-site energy generation.
Construction Phase
• Seamless coordination: Align architects, energy assessors, and builders for consistent implementation.
• Compliance monitoring: Ensure any design changes maintain SEC1 standards.
• Material guidance & airtightness testing: Supporting in use performance that aligns with design intent.
• Support on-site: Helping ensure detailing works and systems align, so you get the most from your home.
The Benefits of SEC1-Compliant Homes
By following SEC1, homeowners enjoy tangible benefits:
• Lower energy bills – reduced heating and electricity costs
• Enhanced comfort – consistent indoor temperatures year-round
• Future-proofed homes – designed to meet climate and sustainability goals
• Increased property value – high-performance homes are increasingly sought after
• Environmental impact – reduced carbon footprint and contribution to Cornwall’s climate targets
Build Smarter, Greener, and More Comfortably
At the end of the day, building a home that’s comfortable, affordable to run, and better for the planet doesn’t have to be complicated. With the right guidance and planning, your Cornwall home can meet SEC1 requirements, match Passive House-level performance, and provide a healthy, sustainable environment for years to come.
Contact us today to start your SEC1-compliant journey. Together, we can design and build a home that’s ready for the future efficient, sustainable, and truly comfortable.
Truro: 01872 225 259
Exeter: 01392 979 135
Email: hello@laurenceassociates.co.uk
