Whole-House Retrofit Design
Smarter Retrofit Starts with the Right Design
Whole-house retrofit design is the foundation of successful energy-efficiency improvements. AEG Construction provides compliant, performance-led retrofit design services that assess homes as complete systems, not isolated measures. This approach ensures upgrades deliver lasting comfort, lower energy bills, and long-term building protection.
By following PAS 2035 principles, AEG Construction designs retrofit solutions that balance energy performance, occupant wellbeing, and building fabric integrity creating homes that are warmer, healthier, and future-ready.
What Is Whole-House Retrofit Design?
Whole-house retrofit design takes a holistic view of a property, considering how insulation, heating, ventilation, and renewable technologies interact together.
Rather than installing individual measures in isolation, the design process:
- • Identifies the most effective upgrade sequence.
- • Prevents unintended issues such as damp or overheating.
- • Ensures improvements work together to maximise performance.
- • Aligns works with funding, compliance, and long-term outcomes.
PAS 2035-Aligned Design Approach
AEG Construction delivers whole-house retrofit design in line with PAS 2035, the recognised UK standard for domestic retrofit projects. This structured approach ensures each property is properly assessed, risks are managed, measures are correctly sequenced, and upgrades deliver long-term performance, safety, and regulatory compliance.
Where required, a qualified Retrofit Coordinator oversees the design and delivery process, ensuring full compliance with PAS 2035 standards while maintaining quality assurance across assessment, specification, installation, and final project sign-off.
Our Whole-House Retrofit Design Process
Property Assessment
A detailed assessment evaluates heat loss, ventilation, moisture risk, and existing systems to understand how the home currently performs.
Energy Performance Analysis
The property’s energy use, EPC rating, and improvement potential are reviewed to identify priority measures and achievable performance gains.
Retrofit Risk Assessment
Risks such as condensation, structural impact, and occupant disruption are identified and mitigated through informed design decisions.
Improvement Strategy & Measure Selection
A tailored retrofit plan is created, combining insulation, heating, ventilation, and renewable technologies where appropriate.
Sequencing & Specification
Measures are sequenced correctly to protect the building fabric and ensure each upgrade supports the next for optimal performance.
Design Sign-Off & Compliance
Final designs are checked, documented, and approved in line with PAS 2035 and any funding or scheme requirements.
What Retrofit Measures Can Be Included?
Whole-house retrofit design considers a wide range of energy-efficiency and low-carbon measures, carefully selected to work together as part of a single improvement strategy. Whole-house retrofit design may include:
- Loft, cavity, and external wall insulation.
- Low-carbon heating systems such as air source heat pumps.
- Solar PV and renewable energy technologies.
- Ventilation upgrades to maintain healthy indoor air quality.
- Heating controls and system optimisation.
Benefits of a Whole-House Retrofit Design
- Lower energy bills by reducing heat loss and overall household energy demand.
- Improved comfort through consistent indoor temperatures and reduced cold spots.
- Better indoor air quality, supporting healthier and more comfortable living environments.
- Reduced carbon emissions by improving efficiency and adopting low-carbon technologies.
- Improved EPC ratings, supporting compliance with current and future regulations.
- Long-term protection of the building fabric, reducing maintenance risks and costs.
Start Your Whole-House Retrofit Journey
Whether planning funded upgrades or private retrofit works, AEG Construction provides the design expertise needed to deliver successful outcomes.
Contact AEG Construction today to discuss whole-house retrofit design and take the first step toward a warmer, more efficient home.