When your home starts to feel a little too small, moving isn’t always the best solution. For many homeowners, an extension is a far more practical and cost-effective way to create extra space while adding value to the property.
One of the biggest decisions to make is whether a single storey or double storey extension is the better option. Both can completely transform a home, but the right choice depends on your budget, space, and long-term plans.
Here are some key points to help you decide.
1. What Is a Single Storey Extension?
A single storey extension adds extra space to the ground floor of your home. These are commonly used for:
• Open-plan kitchens
• Dining areas
• Larger living rooms
• Utility rooms
• Home offices
Single storey extensions are popular because they can dramatically improve day-to-day living while creating a more modern and sociable layout.
2. What Is a Double Storey Extension?
A double storey extension adds space across two floors of your property. This means you can increase both downstairs and upstairs living areas at the same time.
Typical uses include:
• Extra bedrooms
• Additional bathrooms
• Larger kitchens
• Expanded living spaces
• Dressing rooms or en suites
This option is ideal for growing families who need significantly more room.
3. Single Storey Extensions Are Often More Budget Friendly
If budget is one of the main deciding factors, a single storey extension is usually the more affordable option.
They generally:
• Require less structural work
• Take less time to complete
• Involve lower material costs
• Cause slightly less disruption
For homeowners wanting to improve their living space without undertaking a major project, this can be a great solution.
4. Double Storey Extensions Can Offer Better Long-Term Value
Although double storey extensions cost more initially, they often provide better value per square metre.
Because the foundations and roof are already being constructed, adding an extra floor can sometimes be more cost-effective than extending twice in the future.
They can also significantly increase property value by adding extra bedrooms and bathrooms.
5. Think About Your Future Plans
Before deciding, it’s important to consider your long-term needs.
Ask yourself:
• Will your family grow in the future?
• Do you work from home?
• Could you outgrow the space again?
• Are you planning to stay in the property long term?
A single storey extension may solve current problems, while a double storey extension could future-proof your home for years to come.
6. Garden Space Matters
Single storey extensions usually take up more ground space, meaning they can reduce garden size.
A double storey extension allows you to gain more internal space while potentially keeping more outdoor area intact.
This can be especially important for families who value their garden space.
7. Planning Permission May Differ
Both types of extensions may require planning permission depending on the size and design of the project.
Double storey extensions are typically subject to stricter regulations regarding:
• Height
• Overlooking neighbouring properties
• Distance from boundaries
Working with an experienced construction company can help make the process far smoother.
8. Consider the Impact on Daily Living
Any building work causes some disruption, but larger projects naturally take longer.
Single storey extensions may be quicker to complete, whereas double storey extensions often involve:
• More structural work
• Longer build times
• Greater changes to the existing home layout
However, many homeowners feel the additional space is well worth the investment.
9. Natural Light Can Transform the Space
Modern extensions are not just about adding square footage — they’re about improving how a home feels.
Features such as:
• Roof lanterns
• Bi-fold doors
• Large windows
• Open-plan layouts can completely transform a property and create bright, welcoming living spaces.
10. The Right Choice Depends on Your Lifestyle
There is no one-size-fits-all answer when it comes to extensions.
A single storey extension may be perfect for homeowners wanting:
• A larger kitchen
• Better entertaining space
• Improved downstairs living
A double storey extension may suit families needing:
• Additional bedrooms
• More bathrooms
• Long-term extra space
The best option is the one that works for your home, budget, and future plans.
At NH Construction, we work closely with homeowners to create extensions that are practical, stylish, and tailored to their needs. Whether you’re considering a single or double storey extension, careful planning and expert advice can make all the difference.