[email protected] 0207 228 1324
Unit 23, Battersea Business Centre
99-109 Lavender Hill
London SW11 5QL
Get a Free Consultation
Armstrong Simmonds
Architects
Get a free consultation today





    0207 228 1324 Get in touch via phone
    [email protected] Get in touch via email
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    Basement Architects in Wandsworth

    Transforming the space beneath your home into something extraordinary

    If you’re unsure how best to unlock the full potential of your property, particularly in conservation areas or with listed buildings, Armstrong Simmonds Architects can help. With years of experience delivering bespoke basement architecture, we offer thoughtful, elegant solutions that bring valuable extra space to your home. Whether you need:

    • an open-plan kitchen or dining area
    • a generous family room or snug
    • a dedicated home office or study
    • an extra bedroom or en-suite bathroom
    • a media or cinema room

    Our team will guide you through the process of designing and delivering a tailored space that fits seamlessly into your lifestyle and home.

    At our architect studio, we focus on creating high-quality, design-led interiors that also meet modern planning, safety and technical standards.

    Basement Architects in Wandsworth

    Looking for Experienced Basement Architects in Wandsworth?

    As a RIBA Chartered practice specialising in basement renovations, we bring both technical precision and creative flair to every stage of the process:

    • Planning & Building Regulations – Our Basement Architects manage complex applications and statutory requirements with confidence, ensuring your project runs smoothly from the outset.
    • Local Borough Knowledge – With extensive experience across Central and South West London, we understand the nuances of borough-specific planning policies and architectural character.
    • Policy Expertise – We keep abreast of planning policy and the varying interpretations adopted by London boroughs, offering strategic, context-aware design advice.
    • Specialist Basement Knowledge – Our designs consider everything from geotechnical surveys to party wall requirements, listed building consents and construction access, ensuring fully considered, buildable solutions.
    Get a free consultation today





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      Your Basement Construction From Concept to On Site

      As a RIBA Chartered studio with an experienced in-house team, we offer a full end-to-end service for your basement project in Wandsworth.

      1

      Concept

      Briefing & Survey
      Armstrong Simmonds Architects will work with you to develop a concept design, sketching layout options to explore the potential of the property. We will also carry out a full measured survey of the property and its surroundings, allowing us to produce an accurate set of drawings.
      2

      Planning

      Application & Scheme Design
      Following on from the briefing we will prepare a set of scale drawings reflecting the range of ideas discussed. We will prepare and submit the planning application, liaising with the council as needed throughout the process. Our extensive experience will help facilitate a smooth planning process.
      3

      Visualisation

      3D Modelling Services
      To help you visualise the space in three dimensions we can produce internal and / or external views of your project. This can also be a useful tool to demonstrate the merits of the scheme to planners.
      4

      Technical

      Building Control and Detailing
      We will produce detailed technical drawings including drainage and electrical layouts, consulting with you to ensure the design meets your needs. We will then submit to building control and manage the approval process. As part of our architectural services during this process we can assist you in appointing other consultants, for example the structural engineer or party wall surveyor.
      5

      Specification

      Interior Architecture and Schedules
      We offer interior architecture and design for a high spec finish. We can produce further detailed information integrating specialist glazing components, floor finishes, joinery and bespoke staircase design as required.
      6

      Interior Design

      Furniture, Fittings & Equipment
      We provide Interior design architecture services ourselves or through collaboration with other London based Interior Designers, who may also be appointed by the client.
      We are happy to specify FF&E (furniture, fittings and equipment) for the project, providing a complete “one-stop” shop for your development.
      7

      Tendering

      Prices and Builders
      We will help you make an informed choice on an appropriate contractor. We maintain a selective tender list of contractors especially in the local London area, who we have experience working with on site. We will prepare tender documentation and appraise their quotes.
      8

      On Site

      Contract Administration
      Armstrong Simmonds Architects facilitates the implementation of the design by administrating a contract between you and the contractor. Amongst a wide array of architectural services, this will include undertaking site visits to monitor the quality of construction and handle any on-site queries from the contractor.
      Let's discuss your project
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      Why Consider a Basement Conversion in Wandsworth

      Maximise your home’s potential – without building upwards

      A basement conversion Wandsworth can significantly expand your home’s usable area while preserving its external appearance, ideal for properties with planning restrictions or heritage status. This approach allows you to enhance your living space and improve your property’s market value with minimal impact on its original character.

      Natural Light, Smart Design

      Basement spaces don’t have to feel dark or disconnected from the rest of the house. As an Architects Studio, we focus on crafting well-lit, welcoming interiors by:

      • avoiding closed-off layouts in favour of open, airy plans
      • incorporating generous glazing, lightwells, and clever lighting strategies
      • balancing practicality with a refined, timeless aesthetic

      Our architectural solutions ensure your basement feels like a natural continuation of your home, not an afterthought.

      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.
      go to more reviews:
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      Our Expertise in Wandsworth Basements

      We have delivered successful basement conversions across a wide range of London boroughs, from homes in conservation areas to challenging urban sites. This depth of experience enables us to offer informed advice and creative, context-sensitive designs tailored to your property in Wandsworth.

      Every basement conversion we undertake is bespoke and aligned to your lifestyle, budget, and long-term goals. Whether you’re extending an existing space or starting from scratch, we deliver designs that are not only practical and beautiful, but also compliant with local and national regulations.

      Start Your Basement conversion in Wandsworth

      Ready to explore the potential of your home? Our experienced team of basement architects is here to help. We’ll guide you through each stage with clarity and care. Get in touch with us today to book a consultation.

      0207 228 1324 Get in touch via phone
      [email protected] Get in touch via email
      Armstrong Simmonds Architects Ltd
      Unit 23, Battersea Business Centre,
      99-109 Lavender Hill, London, SW11 5QL

      Get a free consultation today





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        Basement Architects in Wandsworth