Single Storey Extension vs. Double Storey: Which Is Better?

If you’re considering extending your home, here comes the big question: should you go for a single storey extension or take the plunge with a double storey extension? Both have their pros and cons, and the right choice depends on your needs, budget, and future plans.  

Extensions can add space, boost property value, and enhance functionality without the stress of moving. Whether you need a larger kitchen, extra bedroom, or home office, making an informed decision is important. 

In this blog, we’ll discuss the pros and cons of each extension type to help you choose the best option for your home.  

How Much Does a Single Storey Extension Cost? 

A single storey extension is a fantastic option if you’re looking to expand your living space without going all-in on a major renovation. But let’s talk money—because that’s always a key factor! 

The single storey extension cost can vary depending on size, materials, and location. In areas with higher demand, like South London, costs can be higher. Despite the investment, this option is usually more affordable and quicker to complete compared to a double storey extension. 

Pros: 

• More cost-effective than a double storey.

• Less disruption during construction.

• Ideal for open-plan kitchens, extra living areas, or home offices.

Cons: 

• Limited space addition – just one floor. 

• Might sacrifice garden space. 

• Doesn’t always add as much value as a double storey extension. 

Is a Double Storey Extension Worth It? 

If you’re thinking long-term and need serious space, a double storey extension could be the way to go. Yes, it’s a bigger investment, but it also delivers bigger results. 

The double storey extension cost is higher, but considering you’re getting twice the space, it often provides better value per square metre than a single storey option. Plus, for homeowners with a double storey semi-detached house, this type of extension often blends perfectly with the existing structure. 

Pros: 

• Adds significantly more space (bedrooms, bathrooms, offices, etc.). 

• Increases property value more than a single storey extension. 

• Makes better use of land without sacrificing garden space. 

Cons: 

• Higher costs and longer construction time. 

• Might require more planning permissions. 

• Can be more disruptive during the build. 

Design & Lifestyle Benefits: Which One Fits Your Home? 

If you want to create an airy, open-plan space, a rear extension idea for a single storey could be perfect—think modern kitchens with bi-fold doors opening into your garden. On the other hand, a double storey extension idea might allow you to add an extra bedroom, or even a home office upstairs. 

Ultimately, it comes down to how much space you need and how you plan to use it. If your family is growing and you don’t want to move, a double storey extension might be a game-changer. But if you just need a little extra breathing room, a single storey extension will do the trick without breaking the bank. 

Which One Should You Choose? 

Before making a decision, consider: 

1. Budget: If you want a more affordable option, a single storey is best. But for long-term investment, double storey adds more value.
2. Space Needs: Need multiple rooms? Double storey. Just a bigger kitchen or living room? Single storey.
3. Garden Space: A single storey extension takes up more land, while a double storey makes better use of vertical space.
4. Property Type: A double storey semi-detached house often benefits from a matching extension, whereas some homes suit a single storey better. 

Get Expert Advice for Your Home Extension from Doran Bros Construction 

Choosing between a single storey extension and a double storey extension is a big decision, but you don’t have to do it alone. At Doran Bros Construction, we specialise in house extensions in South London, offering expert advice and high-quality builds that suit your home and budget. 

Ready to transform your space? Contact us today, and let’s bring your dream extension to life!