For homeowners who have reached the point where their property no longer comfortably accommodates the demands of daily life, the question of what to do next is rarely simple. Moving carries enormous financial and emotional costs. Larger projects like double storey extensions or loft conversions, while transformative, involve considerable construction complexity and extended programmes that are not always the right fit for every household or every property. There is, however, a solution that sits at the intersection of accessibility, affordability, and genuine spatial impact, one that has helped hundreds of thousands of UK households unlock the potential of their existing home without the disruption of a major undertaking. A single storey extension is the most straightforward, most widely applicable, and most consistently rewarding way to add meaningful living space to a home, and Extension Architecture has built a reputation as one of the UK’s most trusted practices for designing and delivering them.
You can calculate the cost of a single story extension here.
What Makes a Single Storey Extension the Right Choice
A single storey extension is an addition built at ground floor level, extending the footprint of a home outward to create new or expanded interior space without adding height. It is the most common form of residential extension in the UK, and its popularity is not accidental. The single storey extension is accessible to a wider range of property types than any other form of addition, applicable to terraced houses, semi-detached properties, detached homes, and bungalows alike, and it addresses the space needs that matter most to the greatest number of households.
The ground floor is where most families spend the majority of their waking hours at home. It is where meals are prepared and shared, where children do homework and play, where the household gathers at the end of the day, and where guests are welcomed and entertained. Expanding this floor in a way that is carefully designed to reflect how a specific family actually lives produces an immediate and daily improvement in the quality of life at home that is felt by every member of the household from the moment construction is complete.
The Range of What a Single Storey Extension Can Achieve
One of the most valuable qualities of the single storey extension as a project type is its versatility. It can be configured as a rear extension, a side extension, or a wraparound extension that combines both directions, and it can be designed to deliver almost any spatial outcome that a household requires. The open plan kitchen, dining, and living space that has become the defining aspiration of contemporary domestic life in the UK is almost always delivered through a single storey rear extension. A new utility room, a ground floor bathroom, a playroom, a home office, a snug, or a generous entrance hall can all be created through thoughtful single storey addition.
Extension Architecture approaches each single storey extension project as a unique design problem rather than a standardised product. The practice takes the time to understand how each household lives, what it needs from its ground floor, and what the specific property offers in terms of orientation, garden relationship, natural light potential, and planning context. The result is a design that is precisely calibrated to the needs of that household and that property rather than a generic solution applied without consideration for what makes each project distinct.
Planning and Permitted Development
A significant practical advantage of many single storey extensions is that they can be built under permitted development rights, meaning that formal planning permission is not required. For rear extensions that meet specific size, height, and siting criteria, the homeowner can proceed directly to building regulations without the time and uncertainty of a full planning application. This can meaningfully accelerate the programme of a project and reduce the professional costs associated with the pre-construction phase.
Extension Architecture’s architects have a thorough understanding of permitted development rules and their application across different property types and planning contexts. The practice advises every client clearly and accurately about whether their project can proceed under permitted development or whether a planning application will be required, and prepares the appropriate submissions with the precision and professionalism that gives each project the best possible chance of a smooth and timely outcome.
Design Excellence in Every Single Storey Extension
The accessibility and relative simplicity of the single storey extension as a project type does not mean that design quality matters any less. A poorly designed single storey extension can fail to deliver the light, space, and livability that the homeowner envisioned, and can even diminish the character and value of the original property. A well-designed one, by contrast, can transform the daily experience of a home in ways that exceed even the most optimistic expectations.
Extension Architecture brings the same level of design ambition and creative intelligence to every single storey extension it designs as it brings to its most complex and ambitious projects. The practice’s commitment to spatial quality, material honesty, and the thoughtful integration of natural light ensures that every extension it delivers is not merely functional but genuinely beautiful.
Trusting Extension Architecture with Your Extension
From the initial feasibility conversation through planning, building regulations, and construction stage oversight, Extension Architecture provides the complete professional service that every single storey extension deserves. The practice’s depth of experience across London and the wider UK means that every project benefits from accumulated knowledge, considered design thinking, and the professional rigour that turns a straightforward project type into an exceptional result.
For homeowners ready to add space in the most accessible and rewarding way possible, the single storey extension is the answer, and Extension Architecture is the practice to deliver it.
