Business Details
45 Years
experience
Sustainable Architects in Twickenham | Clive Chapman Architects
Clive Chapman Architects is a design-led architectural practice established in 1981, specialising in urban design and regeneration. Our expertise spans commercial, residential (including Paragraph 84), heritage, urban planning, and masterplanning sectors. Sustainability has been central to our work for decades, offering comprehensive consultancy services covering Renewable Energy, Passivhaus Design, SAP10, and BREEAM Assessments. We deliver efficient, low-carbon buildings through meticulous technical detailing and on-site assessments. Our RIBA Chartered Practice status, certification as Passivhaus Designers, and BREEAM assessor licensing underscore our technical authority. The practice's purpose-built office on Eel Pie Island, winner of the Richmond Upon Thames Sustainable Design Award 2000, reflects our commitment to environmental principles.We combine 40+ years of experience with innovative methodologies, including TM59/TM52 dynamic modelling for solar optimisation and thermal bridging analysis. Our team's expertise in heritage conservation and flood-resilient design addresses diverse project requirements. Awards such as the Almshouse Association Inspirational Homes Award 2025 validate our design excellence. We maintain transparency through detailed technical drawings (1:5 scale) and interstitial condensation analysis to ensure building performance.
Services
Urban Design
Regeneration
Heritage Conservation
Passivhaus Consultancy
Sustainability Consultancy
Renewable Energy
BREEAM Assessments
Technical Detail Analysis
Energy Reports
Details
- Year established: 1981
Highlights and features
- Established in 1981 with continuous architectural expertise
- RIBA Chartered Practice with technical accreditation
- Certified Passivhaus Designers for energy efficiency
- Licensed BREEAM assessors for environmental standards
- Award-winning sustainable design specialists
Associations and certifications
- RIBA Chartered Practice
- Passivhaus Designer
- BREEAM Assessor
Services
Passivhaus Consultancy
We provide comprehensive Passivhaus design services from concept to completion. Our certified designers deliver low-energy buildings through technical detailing, on-site assessments, and performance monitoring. This includes TM59/TM52 dynamic modelling for solar optimisation and thermal envelope analysis to eliminate cold bridges, ensuring comfortable, energy-efficient spaces that meet Passivhaus Institut certification standards.
Renewable Energy Consultancy
Our renewable energy consultancy integrates sustainable systems into building projects. Through simulation testing, we optimise energy efficiency for heating, hot water, ventilation, and electricity generation. This reduces operational costs while meeting carbon reduction targets. Services include feasibility studies, system specification, and performance analysis to ensure practical, cost-effective renewable energy solutions for new and existing buildings.
BREEAM Assessments
As licensed assessors, we provide BREEAM Domestic Refurbishment evaluations for converting non-residential buildings or upgrading existing homes. Our process analyses energy, water, materials, and pollution factors to achieve environmental compliance. We guide clients through the assessment criteria, delivering actionable recommendations to enhance sustainability performance and achieve certification for improved building value and occupant wellbeing.
Technical Detail Analysis
We conduct thermal bridging analysis at critical junctions using 1:5 scale drawings to ensure continuous insulation. Our team performs interstitial condensation assessments alongside U-value calculations at key project stages. This precision engineering prevents moisture issues and heat loss, maintaining structural integrity while meeting regulatory standards for energy efficiency and indoor environmental quality in residential and commercial developments.
Energy Reports
Our SAP10-compliant energy reports evaluate residential buildings' carbon performance towards net-zero targets. We analyse fabric specifications, renewable energy integration, and operational efficiency to deliver actionable sustainability strategies. Reports include compliance pathways for Approved Documents L and O, ensuring developments meet current regulations while optimising energy consumption and occupant comfort through evidence-based design recommendations.
Questions
What architectural services do you specialise in?
We specialise in urban design, regeneration, heritage conservation, and sustainable architecture. Our expertise includes Passivhaus design, BREEAM assessments, renewable energy integration, and technical detailing for residential, commercial, and masterplanning projects.
Are you certified for Passivhaus projects?
Yes, we are certified Passivhaus Designers with experience delivering certified low-energy buildings. Our services cover concept design, technical detailing, on-site assessments, and performance monitoring to meet Passivhaus Institut standards.
How do you approach sustainable design?
Sustainability is central to our practice. We combine energy modelling (TM59/TM52), thermal analysis, and renewable energy integration to create efficient buildings. Our RIBA Chartered team uses SAP10 and BREEAM methodologies to achieve carbon reduction targets while maintaining design excellence.
Can you assess existing buildings for sustainability?
Yes, we provide BREEAM Domestic Refurbishment assessments and SAP10 energy reports for existing buildings. Our analysis covers fabric performance, renewable energy potential, and compliance pathways to improve environmental performance and meet modern standards.
What awards have you won?
We've received the Almshouse Association Inspirational Homes Award 2025, Richmond Society Award 2023 Commendation, Civic Trust Awards Commendation 2000, and Downland Prize Shortlist 2000 for our sustainable design achievements.
