Business Details
Sustainable Architecture & Deep Retrofit Experts
We are a team of architects dedicated to sustainable design, specialising in creating innovative, energy-efficient buildings that align with a low-carbon future. With two decades of expertise in retrofit projects, we have pioneered groundbreaking solutions for historic and modern structures, including deep retrofit initiatives that significantly reduce energy consumption. Our work has earned recognition such as RIBA Awards, reflecting our commitment to merging architectural heritage with contemporary sustainability standards.We actively contribute to industry guidance documents, collaborating with local authorities and organisations to shape net-zero strategies. Our approach prioritises holistic design, combining materials, textures, and bespoke elements to craft functional, atmospheric spaces that respect both rural and urban environments. Through research, teaching, and practical application, we continue to push the boundaries of low-energy construction while maintaining a strong focus on client collaboration and environmental responsibility.
Services
Sustainable Architecture
Deep Retrofit
Passivhaus Design
Energy Efficiency Consultancy
Conservation Area Projects
Highlights and features
- 20 years of pioneering experience in deep retrofit projects
- RIBA Award-winning designs for energy-efficient transformations
- Specialists in balancing heritage conservation with modern sustainability
- Contributors to national retrofit policy and guidance documents
- Proven expertise in reducing energy consumption by up to 95%
Associations and certifications
- RIBA
- PAS 2035
What people say
95% heating reduction
Beautiful functional modern home
Cleverly hidden storage
Atmospheric flowing spaces
Net zero trajectory
Services
Deep Retrofit
We transform existing structures through comprehensive deep retrofit solutions, reducing energy consumption by up to 95% while preserving architectural integrity. Our approach combines advanced insulation, airtightness strategies, and renewable energy integration tailored to each building's unique context. Specialising in listed properties and conservation areas, we deliver sustainable upgrades that meet modern comfort standards without compromising historical value.
Passivhaus Design
Our Passivhaus projects achieve ultra-low energy consumption through precision design and construction methodologies. We apply rigorous thermal performance standards to create comfortable, durable buildings that minimise environmental impact. This service includes certification support, material selection, and detailing to meet the exacting requirements of the Passivhaus Institute.
Sustainable Architecture
We create innovative, low-carbon buildings that harmonise with their surroundings through thoughtful material selection and energy-efficient systems. Our designs prioritise occupant well-being while reducing environmental footprint, incorporating natural light, ventilation, and renewable technologies. This service spans new constructions and adaptive reuse projects across residential and commercial sectors.
Retrofit Policy Guidance
We develop authoritative retrofit strategies and policy documents for local authorities and industry bodies, shaping best practices for nationwide decarbonisation efforts. Our expertise informs actionable frameworks covering technical specifications, financing models, and community engagement strategies to support large-scale retrofit initiatives.
Conservation Area Projects
We specialise in sensitive upgrades for buildings within conservation areas, balancing preservation requirements with modern sustainability goals. Our work includes detailed analysis of traditional construction methods, bespoke detailing solutions, and collaboration with heritage organisations to ensure compliance while achieving energy performance targets.
People
Bob Prewett
Director & Retrofit Specialist
Architect and retrofit expert with 20 years' experience pioneering low-carbon solutions. Developed the retrofit coordinator concept for PAS 2035 standards and authored guidance for London Councils and Bristol City Council.
Questions
What types of buildings do you specialise in retrofitting?
We focus on residential properties including listed buildings, conservation area homes, and urban housing stock across the UK.
How do you balance heritage preservation with energy upgrades?
We use minimally invasive techniques and material analysis to maintain historical integrity while implementing modern insulation and ventilation systems.
Can you help achieve Passivhaus certification?
Yes, we provide full design and consultancy services to meet Passivhaus standards for new builds and retrofits.
Do you work outside the UK?
Our primary focus is UK projects due to regulatory expertise, though we consult on international policy frameworks.
What energy savings can I expect from a retrofit?
Projects typically achieve 70-95% reductions in heating consumption while improving indoor comfort levels.
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