We’ve rounded up some of the best architects for house extensions in the UK.

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Here at Design for Me, we’ve helped thousands of homeowners all over the UK to find the best architect or designer for their project.

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1. Simon – Extension architect in London

(click on their name above to view their full profile and shortlist them for your project)

We are a small design led practice specialising in residential work. We won the Best Extension at the LABC Awards West of England, have been shortlisted for ‘Don’t Move, Improve!’ numerous times and been a finalist in the Camden Design Awards for our work on house extensions. We set up the practice as we enjoy working with private clients and felt we could offer a very personal service, attention to detail and a wealth of ideas based on many years experience.

We aim to create simple, contemporary architecture with an emphasis on light and careful use of materials. We think every project should be crafted with care and attention to create something really special and we aim to surpass our clients expectations of what they can achieve. We also hope to make the experience of designing and building something as enjoyable as possible. I am also a qualified Passivhaus designer, so can bring this expertise to new builds that are seeking exceptional levels of sustainable design.



self build architects

2. Javier & Catalina – Extension architects in Greenwich

(click on their names above to view their full profile and shortlist them for your project)

‘Our architecture and design studio has a reputation that is rooted in craftsmanship, rigorousness and productivity required to design modern custom made spaces, defining place and identity. We bring distinctive ideas, coherent simplicity and careful attention to detail. Design quality and the functionality of spaces are primary attributes of our work.





architect UK



3. Rory – Extension architect in East London

(click on their name above to view their full profile and shortlist them for your project)

Dear homeowner, I started a small design-led architectural practice in 2011 which has worked on many residential projects around the UK. Recently (2019) we have won a number of awards such as a New London Architecture Award, Architects’ Journal Retrofit Award and Build Magazine Award as well as had projects being shortlisted nationally and internationally. Our completed work has been published in Wallpaper, Dezeen, Architect’s Journal, Grand Designs Magazine, the London Evening Standard and Elle Decor.

We offer a comprehensive service which can be tailored to suit each project and we have extensive experience of refurbishments, house extensions and new-builds. I would recommend a phone call or meeting on site in the first instance where we can discuss your project requirements in more detail. From there I can suggest some options which might help you decide how to progress.

Every project is unique, with differing budgets and challenges, but we always place great emphasis on sustainable design and the use of carefully considered materials, textures and finishes to achieve a creative and elegant result. Above all, we value a good working relationship as the cornerstone of every project and this is what I believe enables honest and responsive architecture.


best residential architects UK best residential architects UK


best residential architects UK

best residential architects UK


Hampshire architect

4. Laura – Residential architect in Winchester, Hampshire

(click on their name above to view their full profile and shortlist them for your project)

We work closely with you to create inspiring spaces that are relevant to your needs. At the same time materials and construction processes are carefully selected to create the best possible finish for your budget.


extension architects Hampshire

Winchester architects

Winchester architects


Kent architect

5. Jonathan – Residential architect in Folkestone, Kent

(click on their name above to view their full profile and shortlist them for your project)

Jonathan is a British architecture studio based in Folkestone, Kent. We work at a range of scales including interiors, architecture, landscape interventions, and urban master-planning. We are currently working with a range of private individuals, commercial developers, and cultural institutions.

Jonathan founded his architecture studio in 2018 after working with various established practices, with the fundamentals of his experience developed under Andrew Phillips, a former director at David Chipperfield Architects in London. Jonathan worked on several significant urban development sites across London, with high profile clients such as Sellar.

Jonathan studied architecture at the University of Portsmouth, where he was awarded the Dibben Prize. He then went on to further his master studies at the University of Bath before concluding at the Architectural Association. As well as being half British and half French, Jonathan started life in Bangkok and has lived across the world.


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architects for extensions Kent

kent architects

Cambridgeshire architect

6. Simon – Residential architect in Cambridgeshire

(click on their name above to view their full profile and shortlist them for your project)

‘ENVISION : DESIGN : CREATE I am passionate about design and architecture, and about creating spaces for our clients to enjoy. Our focus is on you and your needs. Your requirements are paramount to ensuring that every aspect of the design fulfils your vision. The ideas will be driven by this and influenced by your site, its environment and your budget. Every project has a story and we would like to add another chapter to yours.

I approach each project to understand the characters, the composition and the historical facts relating to the site or the building, so as to then form the new narrative of the project. The site or plot is a key aspect we always start with on developing a design. I will analyse the orientation, the views around and within the site and the movement of people to the vegetation and topography. All of this information forms layers of influence that start to generate conceptual drivers towards a design.


extension architects Cambridgeshire


Surrey architect

7. Lee – Residential architect in Surrey

(click on their name above to view their full profile and shortlist them for your project)

‘Young London and Surrey based architecture practice. Formed by Lee in 2018, the practice focuses on domestic architecture working with private clients, house builders and property developers. Our approach is to listen to and understand the clients’ needs and aspirations which is fundamental to the design process.

Each home can be viewed differently with every client having a different brief. We look at every project with a fresh approach and every project has time invested to create something unique and purposeful. We work hard to invest time in carefully considered designs and work collaboratively with our clients using various mediums to communicate our ideas.

extension architects Surrey

extension architects Surrey

architects for extensions Surrey


Architect surrey


8. James – Architect in Guildford, Surrey

(click on their name above to view their full profile and shortlist them for your project)

‘James is a registered Architect with 5+ years experience across a diverse portfolio of projects and stages including design, planning and construction. James has a wide range of experience working within a large architectural practice as well as smaller scaled firms that provide a more dedicated service, which includes conservation and planning within historic contexts. James is committed to great design and believes that working collectively with clients is the best way to deliver a project. His design process is simple, start with the you, the client and develop the project from there, working collaboratively to build your brief and help work our what you really want and how you use your space.

extension architects Surrey


architects for extensions Surrey


Architect Reading

9. Katie – Residential architect in Reading

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‘The most rewarding aspect of working in residential architecture is really transforming a client’s home so that it changes the way they live each day for the better. There are so many interesting and clever ways to bring value to a space through light, connections, alignments, material selection and just good design which do not have to add cost above and beyond the desired budget.

We see the process as a collaboration, understanding what our clients are really looking for and developing the design to bring all the crucial details together. One of the best parts of our role is to see how excited clients get as the designs develop and they can see the full potential of their home.


architect Reading

Architects Reading


architects for extensions Reading

architect Reading





10. Will – Residential architect in Brighton

(click on his name above to view his full profile and shortlist his practice for your project)

My name is Will, I am an architect and designer, as well as a university lecturer and Brighton resident.

I am passionate about creating welcoming, personal, innovative spaces and helping people transform their homes into places they will love spending time in every day.

I try to find what it is about you, your family or your property that is unique, and then by working with you, transform this into a design which is personal and individual.

I work with the latest 3D visualisation technology to help you understand the design as it develops, as well as utilising CNC manufacturing to create amazing, truly bespoke elements.
Please don’t hesitate to get in touch, even if just for a chat about what you have planned!






11. Jonty & Harry – Residential architects in Wandsworth

(click on their names above to view their full profile and shortlist the practice for your project)

RIBA Chartered architectural practice specialising in designing and delivering bespoke, crafted homes. We have offices in London & Hampshire and undertake both urban and rural projects across the UK.

We pride ourselves on designing carefully considered, contemporary architecture that maximises the potential of a site whilst remaining sensitive to the context. Our process is rigorous through every stage of a project, and we work closely and collaboratively with our clients and the wider design team. 

We offer a comprehensive service, from initial consultation through to handover of the project, including interior design and full project management. This hands-on, holistic approach allows us to deliver projects to the highest possible standard.’




12. Will – Residential architect in Bristol

(click on his name above to view his full profile and shortlist his practice for your project)

‘I work at an award-winning, design centred practice where we put our clients and the brief at the centre of each project, regardless of size, sector or budget. Our approach is to listen, understand and respond. Our relationship with you will shape the project we create together. This process allows us to find effective, integrated and bespoke solutions and simplify our clients’ experience. Each of our projects is unique and is treated as such, evolving from the initial meeting through to completion.

We are passionate about light, space and creating unique homes for people to live in. We offer an architecture that is refined, simple and thoughtful; combining form, function and aesthetics, with the aim of realising and exceeding your expectations. We will always go the extra mile and have a real sense of pride in delivering each and every project. We offer a free initial consultation with clients so please drop us a line or call in to discuss your project.’






13. Joe – Residential architect in Waltham Forest, East London E10

(click on his name above to view his full profile and shortlist his practice for your project)

‘Our studio specialises in residential architecture.

Our work is centred around finding a considered solution to our client’s brief by taking the big idea and resolving it back to its simplest form, to a point where there is nothing more to add or to take away. We strive to find the delicate balance between craft, materials, functionality, sustainability, light and nature, whilst sensitively considering each detail to create a refined design.

Through this approach, our projects use a restrained material palette with the aim of elevating the beauty of the natural materials selected. The architecture becomes soft, light, sensitive, creating an environment that is beautiful, peaceful and timeless.’


Architect in Cotswolds



14. Lydia – Residential architects in Chipping CampdenGL55

(click on her name above to view her full profile and shortlist her for your project)

‘Lydia is the design director of an award-winning, innovative architecture practice based in the South West, inspired by the unique context of each project. She enjoys creating thoughtful, site-specific designs and developments that enhance the urban or rural environment.

This approach has been recognised by the Miners’ Cottages winning the award for ‘Best Renovation’ in the 2016 Daily Telegraph Homebuilding & Renovating Awards. Young, enthusiastic and personable Lydia feels able to rise to any challenge and likes getting her teeth into tricky architectural issues in a variety of building types. Lydia helps clients, both commercial and residential, unlock potential in their projects by carefully listening to their requirements and is always interested in collaborating with private clients and other developers on projects large or small.’


Extension architect in Cotswolds

Residential architect in the Costwolds

Conversion architect in Cotswolds

architects in West London



15. Oliver – Residential architect in Hammersmith, West London W6

(click on his name above to view his full profile and shortlist him for your project)

‘Director of small RIBA Chartered Practice with experience on residential refurbishments, extensions and new builds. Can provide all services from concept design, planning permission, detailed design documentation, interior design (inc. joinery) cost information and project management on-site. Will work very closely with the client to explore the exciting unique possibilities of each project in order to deliver projects that are beautifully crafted, well-detailed and within budget. Experience in dealing with local councils in London and surrounding areas to secure planning permission on difficult sites. Based in London – experienced with London contractors and local planning departments to maximise chances of planning permission for your property.’



Residential architects in east london

16. Jonathan – Residential architect in Hackney, East London E8

(click on his name above to view his full profile and shortlist him for your project

‘Jonathan is a director at our creative design studio, based in East London. We believe that great design comes through collaborative engagement. Across a range of innovative outputs, from bespoke door handles and furniture to the design of interior spaces and buildings, we aim to demonstrate the positive impacts good design can have; not only on the way we live but also on the way we interact with each other and the world around us. In order to achieve this, we draw from our experiences within the architecture profession and the belief that the best results are born through teamwork. We involve clients and users from the outset; we listen and are open to new situations and concepts. As a studio we aim to work ethically and sustainably and to take the time to learn and help nurture others along the way. Our design output is wide and mirrors our ambition. We have delivered award-winning designs both in the UK and abroad and our projects have been featured in numerous international publications and exhibitions.’


Kitchen extension architect

Renovation architect east london

House extension architect

Architect West London

17. Nicholas – Residential architects in Fitzrovia, West London W1W 

(click on his name above to view his full profile and shortlist him for your project)

‘I am an award-winning RIBA chartered architect. I have extensive experience in delivering residential projects and am profoundly committed to working collaboratively with my clients. I approach all projects with a spirit of curiosity to find innovative design solutions that are specific to the client’s requirements, character and the context of the project. Prior to forming my own architecture studio I worked as project architect at Michaelis Boyd Architects and Heatherwick Studio in London.’


West London architects

architecture firm West London

Architects west london

architects east london

18. Hugh – Residential architect in Hackney E8

(click on his name above to view his full profile and shortlist him for your project

‘I design architecture that makes the most of space, time and money in order to create generous houses that are a pleasure to inhabit. My approach explores re-using architectural styles from the local area in a contemporary manner, and utilising materials that are unusual and individual, yet perfectly suited for each project . These approaches help me to look at each house in its own bespoke way, and celebrate the narrative, colour, and personality of your day-to-day home.

By carrying out careful studies of the area, and then producing design options and iterations, I and my practice come up with new ways to solve problems. Through careful consultation and updates, we ensure that the designs are perfectly suited to the way you want to live. Our tailored approach carries right the way through the project, ensuring that you have completed work of the highest quality.

We have experience of working in Bedford, Ealing, Hammersmith and Fulham, Redbridge, Southwark, Wandsworth, Waltham Forest, Hackney, Haringey, and Islington.’

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architect designed staircase


Cardiff architect

19. Benjamin – Residential architect in Cardiff – CF24

(click on their name above to view their full profile and shortlist them for your project)

“I am an architect and interior designer working on projects throughout the United Kingdom . I established my own practice in 2017 following a number of years working at two of the United Kingdom’s most renowned architecture practices. I am currently working on projects throughout the country, and have experience working on a wide range of projects of varying scale and complexity, from homes on tight urban sites to homes in Areas of Outstanding Natural Beauty.


extension architect Cardiff

architects Cardiff

Cardiff extension architect

architects Cardiff

20. Ana & Bogdan – Residential architect in Islington

(click on their names above to view their full profile and shortlist them for your project)

A note from Design for Me:

We selected Bogdan & Ana’s project to feature in an article! See it here

Instead of just following ever-changing trends, we aim for designs that stand the test of time and age beautifully. We put my effort in every detail from the subtle integration of the proposed designs into the context to fine details of crafted joinery and lighting.

For clients interested in a perfect coherence between interior and exterior, we offer architectural, interior and landscape design services while overseeing the project from concept to completion.

Because we design with care and respect to the context all our planning applications have been approved to date.

The clients and their unique personalities and needs are our biggest inspiration. This is why we first aim to truly understand their needs before coming with problem-solving solutions.



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