Double Storey Extension Cost in Ireland: Expert Guide

Matt Keane
January 15, 2023

Are you planning to extend your home with a double-storey extension? Do you want to know how much does a double-storey extension cost in Ireland? If yes, then you have come to the right place. This comprehensive guide will explore the factors affecting the average cost of double-storey extensions, providing valuable insights for your project. Read on, and reach out for a free consultation to discuss your unique needs.

What is a Double Storey Extension?

A double-storey extension is a home extension that adds an extra floor to your existing house. Depending on the available space and planning permission, it can be built at the rear, side, or front of your property. A double-storey extension can provide more living space, bedrooms, bathrooms, or other needed rooms. It can also increase the value and appeal of your home.

Factors Affecting the Average Cost of Double-Storey Extensions

Size and Design Complexity

The size and complexity of your double-storey extension project play a significant role in determining the overall cost. Larger, more elaborate designs require more time, materials, and labour, driving up the cost.

Construction Materials

The choice of construction materials also impacts the average cost of double-storey extensions. High-quality materials and finishes will increase the cost, while opting for budget-friendly materials may save you money in the short term.

Labour Costs

Labour costs vary depending on the expertise and experience of the contractors you hire. Skilled professionals with a strong track record in the industry may charge higher rates, but they can save you time and money by avoiding costly mistakes.

How Much Does a Double-Storey Extension Cost in Ireland?

While it's difficult to provide a precise figure without considering the unique aspects of your project, we can offer some general cost estimates based on industry data.

Basic Double-Storey Extension

You can expect to pay around €2,500 to €3,000 per square metre for a basic double-storey extension with minimal design complexity. This includes standard materials, finishes, necessary permits, and professional fees.

Mid-Range Double-Storey Extension

A mid-range double-storey extension with average design complexity and upgraded materials may cost between €2,500 and €3,000 per square metre. This estimate includes higher-quality finishes and improved energy efficiency measures.

High-End Double-Storey Extension

For a high-end double-storey extension featuring custom designs, premium materials, and luxury finishes, the cost can range from €2,500 to €3,000+ per square metre. These projects typically require advanced engineering solutions, specialised contractors, and extensive project management.

Additional Costs to Consider

Planning Permission and Building Regulations

Depending on the size and scope of your extension, you may need planning permission and building regulation approval. Be prepared for associated fees, ranging from a few hundred to several thousand euros.

Utility Connections

Extending your home's electrical, plumbing, and heating systems can add to the double-storey extension cost. Consult with professionals to obtain accurate estimates for these services.

Landscaping and External Works

Don't forget about the cost of landscaping and external work. This may include paving, fencing, and other improvements to your property's exterior.

What is the Average Cost of Double Storey Extension?

To better understand the average cost of double-storey extensions in Ireland, we have compiled a table detailing the estimated costs for different sizes and finishes. Please note that these €2,500 to €,3000  figures are indicative and may vary depending on your project requirements.

Size (sqm)       Standard Finish (€/sqm)     Standard Finish(Total) High-Spec Finish (€/sqm)  High-Spec Finish (Total)

20                   1,900 - 2,300                         38,000 - 50,000            2,000 - 2,500                40,000 - 50,000

40                   1,900 - 2,300                         76,000 - 100,000          2,000 - 2,500               80,000 - 100,000

60                   1,900 - 2,300                         114,000 - 150,0002,000 - 2,500120,000 - 150,000

Ready to Extend Your Home with BuildTech?

Take the first step towards your dream double-storey extension by scheduling a free, no-obligation consultation with our experts. We'll assess your needs, discuss your vision, and provide a tailored solution that meets your budget and requirements. Don’t wait any longer - get in touch with us today and find out how much does a double-storey extension cost in Ireland with BuildTech!

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*FYI, parts of this blog post were drafted by artificial technlogy. But rest assured, it's been thoroughly researched, edited, reviewed and me & my team.

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