Skip to content

WSMS Studio is an Architecture & Design studio based in Worcester Park, South-West London run by RIBA chartered Architects Walter and Shanka Mesa-Siverio. The studio offers Architecture, Urban Design and Interior Design services for domestic and community-led projects.

Our Directors are fully qualified Architects, registered with the Architects Registration Board (ARB) and chartered members of the Royal Institute of British Architects (RIBA) with extensive training an expertise in design and construction. We offer a holistic design & management service to our clients and emphasize a bespoke, design-led approach on all of our projects.

Our Projects

Domestic Projects

Community Projects

Scott Pryde

WSMS Studio were super professional and offered me an incredible service . They were commissioned to carry out a full detailed planning application and offered me a very creative design response to my home. I whole heartedly would recommend there professional practice for any design service big or small. They really care about the detail and are passionate and diligent in the execution. We were so pleased when we gained planning on the first attempt. We are looking forward to moving forward with their creative team to deliver the project in the coming months.

Sian Hart

WSMS were super to work with right from the beginning of our home project. Shanka was very happy to explain different options to suit different budgets, she came up with very interesting and creative ideas as well for a two storey side extension. She was super responsive when we had queries. As this was our first architectural home project, it was a real learning curve for us (with plenty of questions along the way) and Shanka went above and beyond to explain our options, various stages of design and the overall process. It was a very professional working relationship, Walter and Shanka are very personable and I would have no hesitation in recommending their services. Thank you very much WSMS!

Joseph Edwards

I’ve worked with WSMS on a number of projects over the years and I have always received an incredibly professional experience. Shanka and her team deliver a quality service whilst maintaining a strong ethical attitude towards suitability and deliverability from the outset. We have delivered a variety of projects together included extensive extensions and renovations to properties in conservation areas, technical packages for commercial buildings and most recently a very detailed design package for a new build Passive Haus. I cannot recommend this company enough!

Project Process & Fees

All our projects follow the RIBA Work Stages, adapted to our tried and tested design-led approach. These cover Stages 0 – 7 for a complete start to finish service and include everything from design to management of the construction process.

Each project and client is unique, so design services need to be suited to each project. The process starts with a project with a bespoke scope of services + associated fee devised around the information you provide.

To receive a no obligation recommended project plan and fee breakdown for your project, please send us details of your project via our contact page or email One of our Architects will get back to you.

Awards and Publications