Single Storey Bungalow Extension: Complete Guide to Design, Cost & Planning
Bungalows have always held a special place in the property market — practical, accessible, and full of potential. But as families grow and lifestyles change, the compact layout that once felt perfectly sufficient can start to feel limiting. A single storey bungalow extension is one of the smartest ways to unlock that potential, creating extra space without the cost or stress of moving house.
From a spacious kitchen-diner opening onto the garden to a private home office or a comfortable extra bedroom, extending your bungalow at ground level keeps everything on one floor — exactly what makes bungalow living so appealing in the first place.
What Does a Single Storey Bungalow Extension Involve?
A single storey bungalow extension adds new living space to the ground floor of your property. It can be built to the rear, the side, or wrapped around a corner of the building depending on your layout and plot. The size can range from a modest room addition to a full-scale extension that dramatically increases your home’s footprint.
Because everything stays at ground level, these projects tend to be quicker to complete, less disruptive to live through, and simpler to gain planning approval for compared to double storey alternatives.
Key Design Considerations
Working with Your Existing Bungalow
The best extensions feel like they belong. Whether you choose to match your bungalow’s original brickwork and roofline for a seamless finish, or go for a clean contemporary contrast, the design should be deliberate. Internal flow matters too — since all your living spaces are on one level, the connection between old and new needs to feel natural. Bifold and sliding doors are brilliant for this, letting spaces open up or close off as needed.
Choosing the Right Roof
Your roof choice shapes how the extension looks and how the interior feels. A pitched roof blends naturally with traditional bungalow designs and creates generous ceiling height inside. A flat roof offers a more modern aesthetic and opens up the option of a roof lantern — a popular feature that pours natural light into the centre of the space.
Natural Light and Open Plan Living
Bungalows can suffer from dark central rooms, so good lighting design is essential. Large glazed doors, roof windows, and well-positioned skylights can transform a space entirely. Many homeowners use their extension project as an opportunity to open up the floor plan — removing walls to create flowing kitchen-dining-living areas that feel modern, sociable, and spacious.
Planning Permission: What You Need to Know
Many single storey bungalow extensions fall under permitted development rights, meaning no formal planning application is required. Whether yours qualifies depends on the size of the extension, how much of the plot is already developed, the height of the new structure, your proximity to boundaries, and whether your home sits in a conservation area or other designated zone.
If permitted development doesn’t apply, you’ll need full planning permission from your local authority — but that doesn’t mean your project won’t be approved. An experienced contractor familiar with local planning policy can guide you through the process efficiently and help avoid costly mistakes.
How Much Does a Single Storey Bungalow Extension Cost?
Extension costs vary depending on size, design complexity, materials, and site conditions. A straightforward rear extension will cost less per square metre than one with intricate glazing, structural alterations, or challenging groundwork.
What matters is the bigger picture: a well-built bungalow extension adds measurable value to your property and eliminates the significant costs of moving — estate agent fees, stamp duty, legal costs, and all the upheaval that comes with it. For most homeowners, extending is both the more affordable and the more satisfying choice.
Frequently Asked Questions
1. Do I need planning permission for a single storey bungalow extension?
Not always. Many bungalow extensions qualify under permitted development rights, which means you can build without a formal application. However, size, location, and site-specific factors all affect whether this applies to your property. It's always worth getting professional advice before you start.
2. How long will the build take?
A typical single storey bungalow extension takes between 8 and 14 weeks to complete once work begins on site. This excludes the time needed for design, planning, and building regulations approval, which can add several weeks to the overall programme depending on your circumstances.
3. Will I have to move out during construction?
In most cases, no. Extensions are usually built at the rear of the property and only connected to the main house at the end of the project. A well-organised building team will manage the works to keep disruption to a minimum, so you can continue living at home throughout.
4. Does a single storey extension add value to a bungalow?
Yes — a professionally designed and built extension will increase your property's market value, often significantly. A larger floor area, a modern kitchen-diner, or an additional bedroom all contribute to a higher valuation and make the property more attractive to future buyers.
5. Can I extend if my bungalow is in a conservation area?
Permitted development rights are restricted or removed entirely in conservation areas, which means you will likely need full planning permission. That said, extensions in conservation areas are regularly approved when the design is sympathetic to the character of the area. Working with a contractor who has experience in these situations is particularly valuable.
