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How much does a loft extension cost?

UK Home Improvement

How Much Does A Loft Extension Cost?

A loft extension is a great way to create more living space in your home and involves converting an attic into a functional room. It’s one of the best ways to make the most of underutilised space while also potentially adding value to the property. 

However, one of the first questions homeowners understandably ask is ‘how much will it cost?’ 

Well, in this article we’ll breakdown the cost of loft extensions outlining everything you need to know about this type of project. 

Read on for more…

What Is A Loft Extension?

A loft extension, also referred to as a loft conversion, is a home improvement project that involves converting unused attic or loft space into a functional room or area of the house. This could be anything including a new bedroom, a home office, a playroom or even a luxurious master bedroom and ensuite. Loft extensions can take various forms depending on the design and structure of your home, the amount of space available and your specific needs.

There are several types of loft extension to choose from including:

  • Dormer loft extension: These add headroom and floor space with a box-shaped structure projecting from the roof.
  • Mansard loft extension: Featuring a flat room with steeply sloped walls, these extensions are most common on the rear of a property.
  • Hip-to-gable loft extension: This involves extending the sloping slide of a roof to create a vertical wall.
  • Velux loft conversion: Keeps the existing roof structure intact and adds a skylight for a source of natural light.

Each of the above options comes with its ow cost implications and suitability depending on the property and specifics of your project. 

Benefits Of A Loft Extension 

Loft extensions are incredibly popular for a variety of reasons. Some of the key benefits include:

  • Increased living space: A loft extension is a great way to add a significant amount of usable square footage to your home, transforming a neglected attic into a fully functional space. 
  • Enhanced property value: According to experts, a well-executed loft extension can potentially increase the value of your home by up to 25%. This makes it a worthwhile investment for homeowners considering a future sale.
  • Cost-effective alternative to moving: If you need more space but don’t want the hassle or expense of moving house, a loft extension can provide the extra room you need without having to uproot the family.
  • Customisable design: With a loft extension, you have the freedom to design a space that suits your specific needs and lifestyle. Whether it’s an open-plan office or a cosy bedroom retreat, your contractor will be able to tailor the project to meet your needs. 
  • Improved energy efficiency: Most modern loft conversions will include high-quality insulation as standard. Along with energy-efficient windows, these features can help reduce your energy bills. 

How Much Does A Loft Extension Cost?

The cost of a loft extension varies significantly depending on the type of location, its location and the overall scope of the project. On average, a loft conversion will likely start from around £20,000 with more expensive or luxurious projects able to exceed £75,000.

A Velux conversion which involves installing windows but doesn’t alter the roof’s structure will be on the cheaper end of the scale and can cost between £15,000 to £25,000. In contrast a dormer loft conversion can reach £40,000 as the roofline will need to be extended to create extra headspace and room. Mansard or hip-to-gable options are even more complex and can exceed £75,000 in some cases. 

It’s also worth noting that figures for materials and labour will vary from company to company and depending on which part of the company you are in.  

Factors That Impact The Cost Of A Loft Extension 

While the rough outline of costs in the section above will give you a general idea of how much a loft extension can cost, there are several other factors that will play a part. 

These include:

Type Of Loft Extension 

The type of loft extension you opt for will likely be the biggest factor in the cost. 

A Velux conversion is the most affordable option since it doesn’t involve any structural alterations. Then, dormer conversions will usually be more expensive than a Velux as some structural work is needed.

A mansard or hip-to-gable loft extension is typically the most expensive type due to the significant structural changes required. 

Area / Location 

Costs can also vary greatly depending on where you live. Properties in London and the South East often face higher labour and material costs compared to other parts of the country. Local planning regulations and permit fees can also impact the cost so make sure you speak with your builder about these factors to ensure you have a thorough understanding of everything. 

Materials 

The choice of what materials to use can also affect the budget. 

High-quality finishes, such as hardwood flooring, bespoke fittings or premium insulation, will increase the cost. Whereas, sustainable or energy-efficient materials may have higher upfront costs but can provide savings in the longterm.  

Size

The larger the loft space, the more materials and labour is required which can make it more expensive. Furthermore, complex designs, such as those types that need extensive structural reinforcement or intricate architectural details, will also add to the expense of the project. 

Additional Features 

If you want to add extra features like an en-suite bathroom, custom cabinetry or underfloor heating, this will likely increase the overall cost by a significant margin. Likewise, if you need upgraded plumbing, electrical wiring or reinforced flooring, these can all add to the budget. 

Final Thoughts

A loft extension is a fantastic way to enhance your home’s space and value, but it’s essential to plan carefully and budget accordingly. Understanding the costs and factors involved, you can ensure your project stays on track and meets your expectations. Before starting, it’s recommended to consult with a professional contractor to get an accurate estimation of the costs.

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