Business Details
6 Years
experience
We focus on residential extensions, renovations, retrofits, and bespoke new-build homes, serving clients across Surrey and the wider South East. Our projects range from internal reconfigurations and loft conversions to full-house refurbishments, energy-efficient upgrades, heritage buildings, and custom-designed homes. We adopt a structured approach that guides clients through feasibility assessments, planning applications, design development, technical coordination, and construction support. Particular attention is given to buildability, risk management, and compliance with UK planning and building regulations, including our responsibilities as Principal Designer under the CDM framework. Sustainability is integral to our design process, incorporating fabric-first principles, low-carbon strategies, and sensitive retrofit solutions. With detailed local planning knowledge and a measured, client-focused approach, we help homeowners achieve comfortable, durable homes while ensuring the process remains clear and professionally managed.
Served areas
- Surrey, Sussex, Berkshire, Hampshire, London
Details
- Year established: 2020
- Employees: 4
- Licensed
- Insured
Highlights and features
- We provide clarity before commitment to avoid costly mistakes.
- Our process identifies risks early, before they escalate.
- We offer calm, sensible guidance tailored to your needs.
- Our expertise ensures realistic, well-informed decisions.
- We respect your homes existing character in every design.
Associations and certifications
- RIBA Chartered Practice
Payment methods
- Debit cards, Credit cards, Mobile payments, Bank transfers
Services
Clarity Call
Our Clarity Call helps homeowners understand what to do first and how to avoid mistakes. It addresses your concerns about planning, investment, and costs. This service ensures you move forward with confidence and no guesswork.
Project Clarity
We start by understanding your homes issues, desired changes, and priorities like budget and timing. This stage confirms whether the project makes sense for you. Its about gaining certainty before any commitment.
Design Exploration
We explore layout options, constraints, and early cost implications without locking anything in. This helps you see whats realistic before making expensive decisions. Its about testing possibilities thoughtfully.
Architectural Support
Our architectural support is shaped around your unique situation and needs. We provide clear guidance through complex processes, ensuring your home works better. This service focuses on improving comfort and efficiency proportionately.
New Build Homes
We design new build homes that align with your vision and lifestyle. Our approach ensures layouts support daily life, not just aesthetics. This service delivers thoughtful, functional spaces tailored to you.
Reviews (6)
John Armenakas
Sep 19, 2025
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James was wonderful to work with, and provided us with 2 wonderful designs that captured everything we wanted in our extension. Once we decided the design we wanted to move forward with, James worked through the planning approval process for us. The results are amazing, and we are so happy with the way our extension looks.
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.
Daniella Taggart
Aug 22, 2024
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James did a great job redesigning our Bungalow.Lots of wow factor in the design & we are very pleased with the results. We would have no hesitation in recommending him, as he is a pleasure to work with & very knowledgeable.
Ross & Daniella Taggart
Ross & Daniella Taggart
James Pace
Nov 27, 2023
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Fantastic service throughout the whole design process and would highly recommend to anyone looking to renovate or extend their property.
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
Shaun Fitzpatrick
May 28, 2023
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Hi Im Shaun, Bricklayer/ General Builder. In the nearly 40 years Ive been working in the construction industry I have worked with and for many good architects. James Williamson Architects trumps them all. Genuine, polite, helpful and professional service from the first call through to site meetings and dealing with the local authorities. I would happily recommend JMA to any prospective clients for peace of mind in the transition from drawings to completed project.