If you’re thinking about extending your home, one of the biggest decisions you’ll face is whether to build a single storey or a double storey extension. Both can transform your property, but they serve very different purposes and come with different costs, timelines and planning considerations.
For homeowners in Lowestoft, the right choice often comes down to budget, available space and long-term plans. Let’s break it down in plain terms so you can decide what makes sense for your home.
What Is a Single Storey Extension?
A single storey extension adds space at ground level only. This is the most common type of extension and is typically used to enlarge kitchens, create open-plan living areas or add a dining space.
Single storey extensions are popular because they’re usually more straightforward to build and less disruptive than adding a second floor. They’re ideal if your main goal is improving downstairs living space rather than adding extra bedrooms.
What Is a Double Storey Extension?
A double storey extension adds space across two levels of your home. This means you can expand your ground floor and also create additional bedrooms or bathrooms upstairs.
While they involve more structural work and planning, double storey extensions often offer better value per square metre compared to building two separate single-level additions later on.
Cost Differences
One of the biggest deciding factors is cost.
Single storey extensions typically cost less overall because they require less structural work and fewer materials. However, when you look at cost per square metre, double storey extensions can actually offer better value since the foundations and roof are already being extended.
If you need both downstairs living space and extra bedrooms, a double storey extension can be more cost-effective in the long run.
Planning Permission and Regulations
Both types of extensions may require planning permission depending on size, location and property type. Height, boundary distance and impact on neighbouring properties all play a role.
Double storey extensions are more likely to face planning restrictions due to their size and visual impact. It’s always important to check requirements early to avoid delays.
Building regulations approval will be required for either option to ensure structural safety and energy efficiency standards are met.
Impact on Garden Space
Single storey extensions extend further into the garden, which may reduce outdoor space. Double storey extensions can sometimes achieve more internal space without using as much garden depth.
If outdoor space is limited, building upwards might be the smarter option.
Disruption During the Build
Any extension will cause some disruption, but double storey projects typically take longer and involve more structural work.
That said, careful planning and clear communication can keep disruption manageable. Many homeowners continue living in their property during the build.
Long-Term Value
Both single and double storey extensions can significantly increase property value when done properly.
Single storey extensions are especially attractive when they create bright, open-plan kitchen and living spaces. Double storey extensions often add extra bedrooms and bathrooms, which can make a home more appealing to families and future buyers.
The key is ensuring the extension blends well with the existing property rather than feeling like an add-on.
Which One Is Right for You?
If your main goal is to improve your kitchen or create a larger living space, a single storey extension may be enough.
If you’re running out of bedrooms or planning for a growing family, a double storey extension might be the better investment.
Ultimately, the right decision depends on your budget, property layout and future plans. Getting professional advice early helps you understand what’s realistically achievable and financially sensible.
Final Thoughts
Extensions are one of the most effective ways to improve your home without moving. Whether you choose a single or double storey option, careful planning and quality workmanship make all the difference.
If you’re considering an extension in Lowestoft and want straightforward advice about your options, speaking to an experienced local team can help you move forward with confidence.
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