What is the Cost of Attic Conversion in Ireland?

Matt Keane
March 26, 2025

Have you considered converting your attic into a functional living space? It’s a great way to add value and usable space, turning an underused area into a bedroom, office, or reading nook. But you may be wondering: What is the cost of attic conversion in Ireland? 

Let’s break it down to give you a clear idea of what to expect.

How Much Does an Attic Conversion Typically Cost?

In Ireland, the cost of converting an attic can typically range from €15,000 to €50,000. This wide range is because the final cost depends on various factors, including the size of your attic, the type of conversion, and the amount of work needed. But don’t worry – we’ll go through the details, so you know exactly what to expect.

Which Key Elements Influence Attic Conversion Costs?

Several elements will influence how much your attic conversion will cost. Here are the key factors to consider:

  • Plumbing
  • Size of the Attic
  • Structural Requirements
  • Access (Stairs or Other Entry)
  • Plumbing
  • Ceiling Height
  • Windows
  • HVAC (Heating, Ventilation, and Air Conditioning)
  • Electrical Requirements

Let’s dive into each factor and explore how it affects the overall cost.

1. Plumbing

Planning to add an en-suite bathroom to your attic? Plumbing costs will be a major consideration. Installing plumbing rough-in and bathroom fixtures can cost between €5,000 and €15,000, depending on the complexity of the installation. Of course, if you don’t need a bathroom, plumbing costs will be much lower.

2. Size of the Attic

The size of your attic is one of the biggest factors in determining the cost. The larger the space, the more materials and labour are required. Generally, the cost is €1,000 to €1,600 per square metre.

Small Attic 

For a small attic (15-25 square metres), expect to pay between €15,000 and €25,000.

Medium-sized Attic

For a medium-sized attic (25-40 square metres), costs usually range between €25,000 and €35,000.

Large-sized Attic

If your attic is larger than 40 square metres, the cost can start at €35,000, with premium projects going over €50,000.

Also, keep in mind that the roof type – whether it’s a dormer, apex, or hipped roof – will influence the cost. Dormers, for example, tend to be more expensive.

3. Structural Requirements

Many attics need significant structural work to ensure they can support the added weight of the conversion. This might involve installing beams, adjusting roof trusses, or reinforcing the floor. Depending on the complexity, these structural changes can add anywhere from €5,000 to €15,000+ to the overall cost.

4. Stairs/Access

If your attic doesn’t have permanent access, you’ll need to install a staircase. Professional stair installation usually costs between €3,000 and €8,000. Plus, if you plan to use the attic as a bedroom or living area, your staircase must meet code-compliant safety standards, which can add to the cost.

5. Ceiling Height

Building regulations require specific ceiling heights for rooms that are meant for living. If your attic has a low ceiling, you may need to lower the floor or raise the roof, which can cost over €10,000. This is an important step to ensure your new space is comfortable, safe, and compliant with regulations.

6. Windows and Natural Light

One of the best ways to enhance your attic is by adding dormers or skylights to increase natural light and airflow. While these additions are lovely, they come at a cost. Dormers typically range between €3,000 and €15,000+ depending on their size and complexity. But trust us, the extra natural light and space will be well worth the investment!

7. HVAC Work

Extending your home’s heating and cooling system to include your attic typically costs between €2,000 and €5,000. The price will depend on whether your existing HVAC system needs upgrading to accommodate the new space.

8. Electrical Work

Electrical work is a critical part of any attic conversion. This includes wiring, lighting installations, and safety features such as fire alarms. Electrical costs generally range from €2,000 to €5,000, depending on the scale of the work.

Is DIY or Professional Help the Right Choice for Your Attic Conversion?

While DIY enthusiasts may be able to save on some labour costs for tasks like framing or insulation, certain parts of the project—especially structural changes, electrical work, and plumbing—must be handled by professionals. These tasks need to meet safety standards and building regulations, so it’s important not to take shortcuts unless you have the expertise.

Here’s an example breakdown for a 32-square-metre attic conversion:

  • Structural Reinforcements: €8,000
  • New Staircase: €5,000
  • Dormer Window: €6,500
  • Insulation: €2,500
  • Electrical Work: €3,500
  • Bathroom Plumbing/Fixtures: €8,000
  • Flooring/Plastering: €10,000
  • Architectural/Construction Fees: €4,000

Total Estimated Cost: €47,500

Let’s Transform Your Attic Into a Beautiful, Functional Space!

Ready to make the most out of your attic? Whether you're dreaming of a cozy bedroom, a stylish office, or an extra living space, BuildTech is here to help.

Let’s bring your attic vision to life! Our expert team will guide you through every step of the conversion process, ensuring a seamless and stress-free experience.

Don’t wait – contact us now and start your attic transformation journey!

Conclusion: 

So, what is the cost of attic conversion in Ireland? While the price can vary greatly depending on factors like size, structural needs, and the type of conversion, an attic conversion remains a smart investment for your home. Not only does it create valuable extra living space, but it can also boost your property’s resale value in the long run.

Contact us today!

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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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