Welcome
JMJ Architectural Design
Residential architectural design across Essex — extensions, conversions & new builds.
Featured Projects
A selection of residential projects across Essex — each one shaped around the client's brief, the character of the property and the possibilities of the site.
What We Do
From initial concept through to planning and technical design, we provide a complete architectural design service for homeowners across Essex.
Extensions
Creating additional space while improving the relationship between existing and new areas.
Renovations
Improving layouts, appearance, functionality and value of existing homes.
Conversions
Adapting existing buildings or spaces — loft, garage — for new uses.
New Builds
Architectural design for new residential properties from the ground up.
Planning
Guidance and preparation of planning applications where required.
Building Regulations
Technical drawings and information required to progress projects towards construction.
Why JMJ?
We are a residential architectural design practice based in Essex. Every project is handled personally — you work directly with us from the first conversation to the final drawing.
Our approach is straightforward: listen carefully, design thoughtfully, and communicate clearly at every stage. We believe good design should be practical as well as considered, and that the best results come from genuinely understanding how you want to live.
Personal service
You work directly with JMJ Architectural Design throughout your project — no handoffs, no account managers. Just honest advice and clear communication from start to finish.
Complete service
From initial concept and planning applications through to building regulations and construction support — we guide your project through every stage with confidence.
Designed for your life
Every design is tailored to your lifestyle, your property and your plans. We create spaces that work beautifully for the way you actually live.
What Our Clients Say
Caroline Nicholson
1 October 2026
Great communication and ideas throughout. Jack understood and applied our vision in retaining the integrity and age of the original property whilst adding modern and creative additional space. Planning application was managed efficiently with help offered as and when required with specialist input etc.
Samantha Pammen
30 September 2026
We couldn't be happier with the service we received from JMJ Architectural Design. From start to finish, they were professional, helpful and gave us excellent advice throughout the whole process. They really listened to what we wanted and helped us make the right decisions for our home, while also offering ideas and guidance. Everything was explained clearly, and we always felt we were in very good hands. Now that our extension is finished, we are absolutely delighted with the results. It has completely transformed our home and we couldn't be happier with our beautiful new space. We would highly recommend JMJ Architectural Design to anyone considering an extension or any other architectural work.
Dominic Ugwuadu
29 August 2025
We used the services of JMJ architectural services to design the conversion of our garage. Our builder recommended him and we are glad he did. Jack was absolutely amazing to work with, he worked us through the whole process and the relevant application with the council. I cannot recommend him enough.
Chris Borrett
25 March 2025
Fantastic service from JMJ Architectural Design Ltd for the extension to the rear of the property in Feering. Jack has an excellent eye for detail and fully understood my vision, even added his own ideas to enhance the design better than i could have imagined. Always kept in the loop with the whole process from start to finish and has extensive knowledge of the local area and local Councils for planning permission. Could not recommend enough!
Leon Grant
25 March 2025
Having worked with Jack on a project in Witham I can highly recommend JMJ Architectural Design. I was really impressed with the detail on the drawings and the 3D imaging. The whole process has been easy and smooth with Jack always being available and accommodating. It's been great to work with him and I'm looking forward to working together in the future!
Brett Melia
24 March 2025
Created some really stunning designs for my new property, can't recommend highly enough.
Ready to start your project?
Get in touch for a free initial consultation — no obligation, just a conversation about your ideas.
Start Your Project