Kitchen side return extensions are one of the most effective ways to transform how a London home works. In many Victorian and Edwardian properties, kitchens are located in narrow rear rooms with limited light and poor connection to the rest of the house.
At Armstrong Simmonds Architects, we design kitchen side return extensions that improve light, flow and day-to-day usability. Whether the aim is to create an open-plan kitchen and dining space or create a more clearly defined space for the kitchen itself, we take a considered architectural approach from concept through to construction.

Aside from providing you with a beautiful design, your architect needs to navigate complex
planning and building laws that regulate the construction industry. Therefore, appointing a
practice with the right amount of experience is the key to a smooth project delivery. Although
not essential, appointing a RIBA chartered practice is also an important factor to consider.
Being RIBA Chartered means that the practice must adhere to a code of conduct of
professionalism and ethics which ensure quality control within the Architectural industry. The
experience of the practice within London is another important factor to consider, particularly,
as each borough has different modes of operation which can influence the design process.
Whilst the National Planning Policy Framework (NPPF) provides the backbone for planning
policy, each individual borough will have its own set of policy and guidance. A particular
challenge within the borough of London is the planning process for basement design. For
such a complex undertaking, stringent planning requirements must be met in the form of
traffic reports, geology surveys and more. Another challenge is the added complexity of
working with historic buildings. If your building is within a conservation area, a designated
building of interest, or a listed building, any work to that building or surrounding area will be
subject to strict requirements that are typically more rigorous than standard planning
requirements. London Architects and designers must ensure their clients are advised
appropriately on the process and that suitable consultants are appointed to conduct the
necessary work.

A kitchen side return extension can help to:
In many London homes, even a relatively modest extension can significantly improve how the kitchen functions when the layout is resolved properly.
Our portfolio includes a range of kitchen-focused side return extensions in London, from compact interventions in Victorian terraces to larger open-plan transformations. Each project is developed with a focus on spatial clarity, light and long-term usability.
Kitchen side return extensions are driven primarily by layout and use rather than a fixed formula. The available width, existing structure and spatial priorities will inform the design, although certain approaches consistently result in more effective and well-resolved kitchen spaces.

As a RIBA Chartered practice founded in 2010, Armstrong Simmonds Architects offers a complete architectural service for residential projects across London. Our work on kitchen side return extensions is shaped by the same principles that run through the wider studio: a focus on bespoke residential design, careful attention to light and materiality, and a commitment to creating spaces that are both functional and refined.

Planning requirements vary depending on the property and location. Some kitchen side return extensions fall within permitted development, while others require planning permission, particularly in conservation areas.
We assess planning constraints early and develop the design in parallel with the kitchen layout, helping to reduce risk and avoid redesign later in the process.
The cost of a kitchen side return extension in London depends on size, specification and complexity.
Each project is unique with different constraints and requirements. Costs will be influenced by:
We help align design decisions with budget from the outset and support the tendering process to ensure appropriate contractor selection.


If you are considering a kitchen side return extension in London, we would be pleased to discuss your project. Armstrong Simmonds Architects can guide you from early ideas through planning, technical design and construction, helping you create a kitchen that works seamlessly for everyday life.

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