When you need more space, an extension is often the best solution. But should you build up or just out? Both options have distinct advantages depending on your needs, budget, and property.

Single Storey Extensions

• Lower Cost: Typically 40–50% cheaper than a double storey extension.
• Easier Planning: More likely to fall within permitted development rights, avoiding the need for a planning application.
• Less Disruption: Faster to build and you can usually continue living in the house throughout construction.
• Ideal For: Expanding kitchens, creating open-plan living areas, adding garden rooms.

Double Storey Extensions

• Better Value Per Square Metre: The additional upper floor shares the same foundations and roof, making it significantly cheaper per square metre than building two separate single storey extensions.
• More Space: Provides additional bedrooms, bathrooms, or home offices on the upper floor.
• Greater Property Value Increase: The extra square footage typically adds more value proportionally.
• Ideal For: Growing families needing both living space and bedrooms.

Planning Considerations

Double storey extensions are more likely to require planning permission and must consider the impact on neighbouring properties, including overlooking and loss of light.

Young’s Construction can help you weigh the options and design the perfect extension for your home. Contact us for a free consultation.