How much does an extension cost in 2024?


If you’re contemplating a home extension in 2024, you’re probably wondering about the costs involved. Home extensions can be a fantastic way to add space and value to your property without the hassle of moving. However, the cost can vary widely depending on numerous factors, from the size and type of the extension to the materials used and the location of your property. This article will delve into the various aspects that influence the cost of a home extension in 2024, providing you with a comprehensive guide to help plan your project effectively.

Factors Influencing Extension Costs

Several factors influence the cost of a home extension. Understanding these can help you make informed decisions and manage your budget more effectively.

Type and Size of Extension

The type and size of your extension are the primary determinants of cost. Single-story extensions are generally cheaper than multi-story ones. A basic single-story extension can start from around $20,000, but this can increase significantly depending on the square footage. For example, a 20-square-meter extension could cost between $30,000 and $50,000. Multi-story extensions, which offer more space, can cost upwards of $60,000 to $100,000, depending on their complexity and size.

Materials Used

The materials you choose play a significant role in determining the overall cost. Standard materials like bricks, concrete, and timber are typically more affordable, while premium materials like glass, steel, or eco-friendly options can drive up costs. For instance, opting for a full-glass extension could increase the cost by 20-30% compared to a brick-built structure.

Labor Costs

Labor costs can vary depending on your location. Urban areas or regions with a higher cost of living generally have higher labor rates. In 2024, you might expect to pay anywhere from $50 to $100 per hour for skilled labor. It’s essential to get multiple quotes from contractors to ensure you’re getting a fair price.

Planning and Permits

Securing the necessary permits and planning approvals can also add to the cost. This process can vary greatly depending on local regulations and the complexity of your project. Permit costs can range from a few hundred to several thousand dollars. Additionally, hiring an architect or a planning consultant to help navigate this process can add another layer of expense.

Design and Features

The design complexity and additional features you incorporate will also impact the cost. A straightforward extension with basic finishes will be less expensive than one with high-end fittings, custom-built elements, or smart home technology. For example, installing underfloor heating, skylights, or bespoke cabinetry can add significant costs to your project.

Average Costs by Extension Type

To give you a more concrete idea, here’s a breakdown of average costs by different types of extensions.

Single-Story Extensions

As mentioned, single-story extensions are among the most common and can range from $20,000 for a small, basic extension to $60,000 or more for larger, more luxurious builds. These extensions are popular for adding additional living space, such as a larger kitchen or an extra living room.

Double-Story Extensions

Double-story extensions can offer more space and can be more cost-effective per square meter than single-story ones. These typically start around $60,000 and can go up to $120,000 or more. They are ideal for adding multiple rooms or expanding both the ground and upper floors.

Loft Conversions

Loft conversions are a popular choice for adding extra bedrooms or office space. The cost of a loft conversion can range from $30,000 to $70,000, depending on the size and complexity. Dormer loft conversions, which include adding a dormer window, can be on the higher end of this range due to the additional structural work required.

Basement Conversions

Basement conversions can be one of the most expensive types of extensions due to the significant structural work involved. These projects can range from $50,000 to $200,000 or more, depending on the size and complexity. They are often used to create additional living space, home gyms, or even self-contained apartments.

Garage Conversions

Converting an existing garage into a living space is often one of the more affordable options, with costs ranging from $10,000 to $30,000. This type of extension is popular for creating additional living rooms, home offices, or even small rental units.

Additional Costs to Consider

Beyond the primary construction costs, several additional expenses can influence the overall budget for your extension project.

Professional Fees

Hiring architects, surveyors, and structural engineers can add to the cost. Architects typically charge between 5% and 15% of the total project cost. Surveyors and engineers might charge an hourly rate or a flat fee, depending on the services required.

Landscaping and External Works

Don’t forget to budget for any necessary landscaping or external works. This might include reconfiguring gardens, driveways, or pathways to accommodate the new extension. These costs can vary widely but can add several thousand dollars to your overall budget.

Utilities and Infrastructure

Extending your home may require upgrading or extending existing utilities, such as plumbing, electrical systems, and heating. These infrastructure upgrades can be costly, particularly if your existing systems need significant modifications to accommodate the new space.

Interior Finishes

The cost of interior finishes, including flooring, painting, and fixtures, can add up quickly. High-end finishes and custom features will significantly increase your budget. It’s essential to plan these details early and include them in your overall cost estimates.

Tips for Managing Extension Costs

Managing the cost of your extension effectively requires careful planning and a clear understanding of your budget and priorities.

Set a Realistic Budget

Establish a realistic budget that includes a contingency fund for unexpected expenses. It’s advisable to set aside at least 10-15% of your budget for unforeseen costs.

Get Multiple Quotes

Obtain quotes from several contractors to ensure you’re getting a competitive price. Be wary of quotes that seem too good to be true, as they may not include all necessary costs or might indicate lower-quality workmanship.

Plan and Prioritize

Clearly define your priorities and must-haves for the extension. This can help you make informed decisions if you need to cut costs. Focus on essential structural elements and plan to add non-essential features later if budget constraints arise.

Work with Professionals

Engaging experienced architects, contractors, and project managers can save you money in the long run by ensuring the project is well-planned and executed efficiently. Professionals can also help navigate complex planning regulations and avoid costly mistakes.

Consider Phased Construction

If budget constraints are significant, consider completing the extension in phases. This approach allows you to spread the cost over a longer period, making it more manageable financially.


Home extensions are a significant investment that can enhance your living space and increase the value of your property. In 2024, the cost of an extension will depend on a variety of factors, including the type and size of the extension, materials used, labor costs, and additional features. By understanding these factors and carefully planning your project, you can manage your budget effectively and create the extension of your dreams. Remember to set a realistic budget, obtain multiple quotes, and work with experienced professionals to ensure your extension project is a success.

Read also: check

Leave a Reply

Your email address will not be published. Required fields are marked *