James Williamson Architects Ltd operates as a RIBA Chartered architectural practice based in Surrey, dedicated to delivering high-quality residential architecture for private homeowners. Our service is tailored to clients seeking professional clarity, sound regulatory knowledge, and thoughtful design outcomes. We approach every project with care and precision, ensuring that clients are supported by structured guidance and dependable expertise from the outset.
Our primary focus lies in residential extensions, renovations, retrofits, and new-build houses throughout Surrey and the wider South East. Our portfolio includes loft conversions, kitchen and living space alterations, comprehensive home refurbishments, low-energy retrofit projects, heritage properties, and bespoke new dwellings. We are recognised for a clear and methodical project process that reduces uncertainty and stress for our clients. From feasibility and planning strategy through to technical design, approvals, and construction-stage assistance, each step is carefully managed. We bring strong expertise in UK planning policy, building regulations, and on-site delivery, including fulfilling the Principal Designer role under the CDM Regulations. Sustainability and long-term performance inform our work through energy-efficient design and sensitive interventions. By working collaboratively with consultants, contractors, and local authorities, we maintain consistency, quality, and confidence throughout every project.
Our primary focus lies in residential extensions, renovations, retrofits, and new-build houses throughout Surrey and the wider South East. Our portfolio includes loft conversions, kitchen and living space alterations, comprehensive home refurbishments, low-energy retrofit projects, heritage properties, and bespoke new dwellings. We are recognised for a clear and methodical project process that reduces uncertainty and stress for our clients. From feasibility and planning strategy through to technical design, approvals, and construction-stage assistance, each step is carefully managed. We bring strong expertise in UK planning policy, building regulations, and on-site delivery, including fulfilling the Principal Designer role under the CDM Regulations. Sustainability and long-term performance inform our work through energy-efficient design and sensitive interventions. By working collaboratively with consultants, contractors, and local authorities, we maintain consistency, quality, and confidence throughout every project.
Served areas
- Surrey, Sussex, Berkshire, Hampshire, London
Details
- Year established: 2020
- Employees: 4
- Licensed
- Insured
Highlights and features
- RIBA Chartered architect delivering clarity, confidence, and calm.
- Bespoke renovations, extensions, and new-build homes designed.
- Planning advice and feasibility studies to unlock potential.
- Passive House and EnerPHit retrofits for efficient living.
- Collaborative 3D and virtual reality design visualisation.
- End-to-end support, from permissions through to completion.
Associations and certifications
- RIBA Chartered Practice
Payment methods
- Debit cards, Credit cards, Mobile payments, Bank transfers
Services
We support families who love their homes but need them to function differently. By managing the design, planning and coordination process, we reduce stress and provide reassurance throughout the project. Our approach ensures that each renovation or extension delivers practical improvements, visual clarity and long-term value without unnecessary disruption. 
We support clients through the entire new build journey, providing clear structure and professional oversight throughout. From early feasibility to construction support, each stage is carefully managed. Our designs prioritise functionality, comfort, and sustainable performance. This ensures a finished home that delivers lasting value and peace of mind. 
Heritage and conservation work demands precision, patience, and understanding. We provide structured guidance from early feasibility through to delivery, ensuring planning sensitivity and design quality remain aligned. Our aim is to protect what makes each property distinctive, while upgrading it to meet todays expectations for comfort and longevity. 
We deliver interior architecture that combines disciplined planning with refined interior design. By guiding you from early ideas through to completed spaces, we ensure clarity, consistency, and confidence throughout the project. Our work results in interiors that are functional, beautifully resolved, and designed to enhance daily life for years to come. People
James Williamson
RIBA Chartered Architect
I am James Williamson, a RIBA Chartered Architect. Raised in the South West, I value architecture that responds discreetly to its setting and improves everyday living. Following more than a decade with award-winning practices in the UK and overseas, I established James Williamson Architects in 2020. My aim is to help clients create homes that feel intuitive, lasting and personal.
Reviews (7)
Tom Wood
Dec 30, 2024
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Jeremy Crump
Aug 31, 2024
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James was an excellent architect for our downstairs renovation project, very reliable, professional, friendly and accomodating to our requirements. James took our initial thinking and came back with some fantastic designs, challenged our thinking and rescoped areas where needed. After that James was very responsive and went above and beyond with his help: setting up discussions with contractors, contacting Building Control, recommeding suppliers. We are so pleased with the finished result. Would not hesitate to recommend James.
Abhivan Chekuri
Jun 29, 2024
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Alex
Jan 11, 2024
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James is an absolute pleasure to work with, he took a lot of time to listen and take onboard what we wanted. He carried out all the necessary paperwork with council which made things super easy for us. His drawings are extremely well detailed right down to the 3d mockup drawings of our extension which was nice touch, it gave a feeling of real progress with our project before it had even begun. I've recommended James to several friends and wouldn't hesitate in recommending him again.
James Pace
Nov 27, 2023
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Sally Hewison
Sep 15, 2023
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We engaged James to explore the possibility of updating our small bungalow and incorporating an additional bedroom and bathroom. Communication was very smooth and James listened attentively, understood the brief well and produced an imaginative design which used the limited space available to its best advantage. The design included floor plans and a 3D virtual walkthrough. We decided for personal reasons not to go further at the present time, but if our situation changes in the future we will be more than happy to continue working with JWA
Mansour Allana
Sep 06, 2023
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I had the pleasure of working with James on a recent project, and I am absolutely thrilled with the results! From the initial consultation to the final completion, James demonstrated exceptional vision and expertise that truly set him apart.
What impressed me the most was James's ability to listen attentively to my ideas and preferences while also offering invaluable insights and creative suggestions. He took the time to understand my vision for the property and translated it into a design that exceeded all my expectations.
James is also highly skilled in navigating complex regulations and permits, which made the entire process smooth and stress-free. His professionalism, responsiveness, and clear communication made collaborating effectively throughout the project easy.
I am beyond thrilled with the end result, and I couldn't be happier with the decision to work with James.
If you're looking for a talented, reliable, and creative Property Architect, I wholeheartedly recommend James. His dedication to his craft and passion for creating outstanding spaces truly make him a standout professional in his field. I wouldn't hesitate to work with him in the future.
Thank you, James, for turning my property into a dream come true!
What impressed me the most was James's ability to listen attentively to my ideas and preferences while also offering invaluable insights and creative suggestions. He took the time to understand my vision for the property and translated it into a design that exceeded all my expectations.
James is also highly skilled in navigating complex regulations and permits, which made the entire process smooth and stress-free. His professionalism, responsiveness, and clear communication made collaborating effectively throughout the project easy.
I am beyond thrilled with the end result, and I couldn't be happier with the decision to work with James.
If you're looking for a talented, reliable, and creative Property Architect, I wholeheartedly recommend James. His dedication to his craft and passion for creating outstanding spaces truly make him a standout professional in his field. I wouldn't hesitate to work with him in the future.
Thank you, James, for turning my property into a dream come true!