Interior Design

A well-designed interior does more than simply look beautiful – it enhances how you live, feel, and interact with your space. At Armstrong Simmonds Architects, our interior design service is carefully integrated with our architectural approach, creating homes that are cohesive, timeless, and highly personal.

Working from our architect studio in Battersea, we provide Interior design services ourselves or through collaboration with other London based Interior Designers, who may also be appointed by the client.

Interior Design

Why Choose Our Professional Interior Design Services

Interior design is about balance: between form and function, light and texture, structure and comfort. Our design process focuses on crafting spaces that not only reflect your personal taste but also support your lifestyle, making the most of natural light, materials, and proportion.

What makes our approach unique is how seamlessly it connects with our architectural services. We don’t treat interior design as an afterthought – we plan and coordinate interiors from the early stages, aligning layouts, material choices, and furniture placement with the architectural vision of your home.

Our clients benefit from:

A holistic approach that blends architecture and interiors
Attention to detail across all design elements
Flexible collaboration with other consultants or interior teams

Whether you want a full interior design package or specific support with finishes, we adapt our service to your needs.

Cost for Interior Design Services

The cost of interior design services in London depends on the scope, size, and complexity of the project. At Armstrong Simmonds Architects, we offer flexible pricing tailored to your brief:

Consultation-only: Ideal for clients who need early direction or material suggestions

Room-by-room design: For clients wanting focused support in specific spaces

Full-service interior design: End-to-end planning, specification, sourcing, and styling

Indicative pricing can range from £1,000+VAT for consultation-based support to £100-£250 per square metre for comprehensive design packages. During our initial discussions, we will provide a proposal outlining a clear scope and fee structure.

Let's discuss your project

Our Process for Interior Design Services

Every project begins with understanding how you live – and how you want to feel in your home. Our process is structured but adaptable, depending on the level of service you require.

Initial Consultation

We begin with a conversation about your goals, preferences, and the existing or proposed architecture of the space. This stage may be conducted in-person or remotely, and includes reviewing any inspiration or reference material.

Moodboards and Concept Direction

Based on your brief, we develop design concepts that establish a visual tone for the interiors – from colours and textures to spatial ambiance. These may include sample boards, imagery, and initial sketches.

Lighting and Spatial Planning

Our plans ensure each space is optimised for comfort and usability. We consider lighting layers (ambient, task, accent), outlet positions, and how natural and artificial light interact with finishes and textures.

3D Visualisation (Optional)

For clients looking to visualise interiors before implementation, we can provide 3D architectural modelling to preview layouts, finishes, and lighting atmospheres.

Procurement and Installation Support

We can assist with sourcing, purchasing, and overseeing deliveries and installations to ensure the final result aligns with the design intent.

Customer
reviews

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Michael van Ree

John and his team have been brilliant to work with for our full house renovation and extension in SW London. Our house is quite unique and that combined with it being in a conservation area we knew it wouldn't be a straight forward planning process - but Armstrong Simmonds did a fantastic job and helped us navigate us through every step. We couldn't be happier with the detailed design and outcome.

Linda Roberts

Architects Armstrong Simmonds were appointed by us to turn our concept of open plan living into reality, which they did with extraordinary vision and design flair. The AS team listened carefully to our ideas and transformed an ordinary detached house into a breathtakingly beautiful home that offered light, space and a lifestyle that exactly reflected our needs and requirements. AS worked closely with us and our builder, and their focus to detail in the design and build was impressive. This young architectural practice in our opinion, offers something more. They listen, understand and are unique in their ability to conceptualise, plan and build with imagination, whilst considering aesthetics and functionality. Linda and Allan Roberts ...>>

Rowena Carter

I cannot recommend Armstrong and Simmonds architects highly enough. Within minutes of John meeting us at our home he had understood our brief and was sharing a vision that ticked all of our boxes.We had met with other architects who did not inspire us and told us the shape we wanted for our extension would not be possible. John had excellent knowledge of the local planning rules, researched planning submissions in the immediate area and was confident that he would get our application through - and he did! During the detailed design process John and his team listened closely to how we wanted to use the space. He came up with many design features and solutions to save costs and keep our dream design within our budget. Throughout the process they delivered an innovative plan that felt personal to us in a professional and timely manner. We found John and his team to be responsive, helpful and caring. They went above and beyond to get our project over the line and I have no hesitation in recommending the firm to anyone looking at home extension/improvement. We would not look anywhere else for any future builds! ...>>

Rebecca Wheelhouse

We had a fantastic experience with John and the team at Armstrong Simmonds. We have a beautiful home and would happily use them for our next project.... hopefully even bigger next time! Flawless from beginning to end, I thoroughly recommend them.

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Frequently asked questions

What's included in full-service interior design?

Full-service interior design includes concept development, material and furniture selection, lighting design, layout planning, and procurement support. It’s a comprehensive solution for clients who want end-to-end coordination.

How long does the interior design process take?

Timeframes vary depending on the scope of the project. A single room may take 4-6 weeks from brief to final design, while full-house designs may extend over several months depending on construction and delivery schedules.

Do I need to use your architectural services to access interior design?

Not necessarily. While many clients combine both, our interior design services are available as a standalone offering. However, working with the same team can improve coherence and reduce complexity.