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What Are the Pros and Cons of Single-Storey vs. Double-Storey Extensions?

Writer's picture: John ShawJohn Shaw

Expanding your home is a significant decision that requires careful thought and planning. One of the first choices homeowners face is whether to opt for a single-storey or double-storey extension. Both options have their unique advantages and disadvantages, making it essential to evaluate your needs, budget, and long-term goals. In this article, we’ll explore the pros and cons of each option to help you make an informed decision. Let’s also see how considerations like refurbishments and bespoke joinery can elevate your project.


Single-Storey Extensions

A single-storey extension is a popular choice for homeowners looking to increase their living space without undertaking an overly complex project. These house extensions are usually added to the rear or side of the property and are ideal for creating open-plan kitchens, dining areas, or family rooms.


Pros of Single-Storey Extensions

  1. Cost-Effective Single-storey extensions are generally more affordable than double-storey options. They require less structural work, which means lower construction and material costs. This makes them an excellent option if your budget is limited.

  2. Simpler Planning Permission Planning permission requirements are often less stringent for single-storey extensions, especially if they fall within permitted development rights. This can save you time and hassle during the approval process.

  3. Seamless Integration A single-storey extension can be designed to flow naturally with your existing space. Features like bespoke joinery can enhance this integration, creating a cohesive and functional layout.

  4. Quicker Completion With fewer complexities, single-storey extensions typically have shorter construction times, allowing you to enjoy your new space sooner.


Cons of Single-Storey Extensions

  1. Limited Space While single-storey extensions can provide valuable living space, they may not be sufficient for larger families or those needing multiple new rooms.

  2. Reduced Garden Area Extending outward often means sacrificing part of your garden, which might not be ideal if outdoor space is a priority.

  3. Potential Overheating Large windows and open-plan designs can lead to overheating in the summer months. Incorporating proper insulation and ventilation during refurbishments is essential to mitigate this issue.


Double-Storey Extensions

Double-storey extensions are the go-to option for homeowners needing significant additional space. By building upwards, you can maximise the potential of your property while maintaining a more compact footprint.


Pros of Double-Storey Extensions

  1. More Space A double-storey extension doubles the usable area, offering the opportunity to add multiple rooms. This is ideal for growing families or those looking to create additional bedrooms and bathrooms.

  2. Increased Property Value Adding extra bedrooms and bathrooms can significantly increase your property’s market value, making it a worthwhile investment.

  3. Efficient Use of Land Unlike single-storey extensions, double-storey options allow you to preserve more of your garden or outdoor space.

  4. Design Versatility With bespoke joinery, you can tailor your double-storey extension to suit your needs perfectly. Customised staircases, storage solutions, and built-ins can make the new space both practical and stylish.

    house extension

Cons of Double-Storey Extensions

  1. Higher Costs Unsurprisingly, double-storey extensions are more expensive. They require additional structural support, such as stronger foundations, which increases the overall budget.

  2. Complex Planning Permission Double-storey extensions often face stricter planning regulations, particularly concerning privacy and overshadowing neighbouring properties. This can lead to longer approval times.

  3. Disruption During Construction Building upwards can be more disruptive to daily life, especially if it involves significant changes to your home’s layout or structure.

  4. Longer Completion Times Due to their complexity, double-storey extensions typically take longer to complete, which might not suit homeowners in urgent need of additional space.


Key Considerations for Both Options

Whether you choose a single-storey or double-storey extension, there are several factors to keep in mind:

  1. Budget Understand your financial limits and plan accordingly. Include costs for materials, labour, refurbishments, and any bespoke joinery to achieve the desired finish.

  2. Purpose of the Extension Clearly define the purpose of the new space. This will guide your choice between a single-storey or double-storey extension and help you design a layout that meets your needs.

  3. Impact on Neighbours Both types of extensions can impact neighbouring properties. Ensure your plans comply with local regulations and consider how your extension might affect their light and privacy.

  4. Energy Efficiency Invest in energy-efficient materials and designs. Proper insulation, double-glazed windows, and modern heating systems can make your extension more sustainable.

  5. Future-Proofing Consider how your needs might change over time. While a single-storey extension might suffice now, a double-storey option could better accommodate future growth or lifestyle changes.


Maximising Your Extension’s Potential

Regardless of the type of extension, attention to detail can make a significant difference in the final result. Bespoke joinery, for instance, can add character and functionality to your new space. From custom cabinetry to fitted wardrobes, tailored solutions ensure your extension not only looks stunning but also works seamlessly with your lifestyle.

Refurbishments are another crucial aspect of any extension project. Updating your existing spaces alongside your new extension ensures a cohesive aesthetic and functionality throughout your home. This is especially important if you’re creating open-plan layouts or integrating new features like a modern kitchen.


Final Thoughts

Choosing between a single-storey and double-storey extension comes down to your unique needs, budget, and long-term plans. Both options offer fantastic opportunities to enhance your home, whether you’re looking for additional living space or increased property value.

By incorporating refurbishments and bespoke joinery into your project, you can create a space that is not only functional but also beautifully tailored to your lifestyle. Take the time to evaluate your priorities, consult with professionals, and plan carefully to achieve the house extension of your dreams.


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