A Breakdown Of Attic Conversion Costs In Ireland

by | Apr 17, 2025

Amid the cost of living crisis in Ireland, many homeowners are opting for an attic transformation as a more budget-friendly way to create space in their property, but what are the attic conversion costs involved?

In this article, we break down the various types of conversion that can be considered, as well as discuss the price tag that comes with each option.

 

What are the different types of attic conversion?

There are several different attic conversions that homeowners can avail themselves of. However, it’s important to note before embarking on a project that the type you choose will largely depend on what the existing structure of your house allows. What this new space will be used for is another determining factor. Here are the different styles of conversion to consider:

 

1. Roof window conversion

The most low-maintenance and cost-effective type of conversion is one that installs roof windows to add natural light to the attic. This is usually carried out when homeowners are seeking a non-habitable area, such as a comfortable and bright space used for storage or an additional living area.

 

2. Hip-to-gable conversion

The main objective of a hip-to-gable conversion is to increase the headroom and maximise usable space within the attic. To achieve this conversion, the sloped hip roof at the side of the house is straightened, creating a vertical gable end.

Due to the structural modification involved, planning permission will be required.

 

3. Dormer conversion

Another conversion that requires planning permission is a dormer conversion, which adds a dormer to the rear, side or front of the roof. Not only does this add extra height inside the attic, but it also increases natural light and boosts circulation within the space.

If you’re unsure of what style to opt for, it’s best to consult with an experienced architect, who can talk you through the best and most practical solution for your home.

 

What are the average attic conversion costs for each type of project?

Before we break down the various expenses associated with an attic conversion, let’s first take a look at how much the overall project is likely to cost.

Considering the various types of attic conversion and the unique requirements of each homeowner, it is difficult to put an exact price on any one project. Depending on the variables involved, it could range anywhere from €25,000 to €55,000.

The largest influence on the final cost will be the size of the space you’re dealing with; the bigger the attic, the bigger the budget you’ll need.

While it is hard to pinpoint a specific figure, it is possible to look at the average costs of each style of conversion to give you a better idea of how to budget for your exciting renovation.

 

Attic conversion costs for a roof window conversion

Given that it is one of the easier conversions to carry out, prices for this type of project start at around €25,000+.

 

Attic conversion costs for a dormer to a side or rear roof conversion

This type of conversion involves modification to the existing space to create extra headroom and circulation space. The cost for such works will usually begin at €35,000 and for more intensive projects, could reach above €55,000.

 

Attic conversion costs for a hip-to-gable and dormer

With extensive alteration of the roof’s structure involved, it’s natural that a heftier price tag should follow suit. Prices tend to start at around €45,000 and could reach more than €65,000, depending on the specifications involved.

 

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A breakdown of attic conversion costs – where does your money go?

Now that you have a rough idea of how much an attic conversion is likely to set you back, it’s time to explore how this money is utilised during the project. Here are the main areas that eat into your conversion budget:

 

Structural modifications

Given that around 60% of your existing attic space will be usable when converted, this is an important factor influencing structural modifications. Those looking to create an extra bedroom or home office may need to consider more extensive works, such as raising the roof or reinforcing the floor in favour of a more comfortable, spacious and safer environment.

Once these changes to the existing structure are on the table, the cost of your project will immediately begin to increase.

 

Stairs and customised access points

Depending on the location of your existing attic entry point and what you have in mind for the transformed space, you will need to consider the possibility of creating a new entry point, which will add to the overall cost.

Accessibility is also a key factor, and one that could take up a considerable section of the budget if your design vision includes a customised staircase made from specific materials.

 

The addition of windows

If you are seeking additional natural light for your new attic space, you will need to budget for new roof windows. The cost for this will depend on the style of windows chosen and how many you require for the desired result.

 

Plumbing and electrics

Oftentimes, for example, in cases where an attic conversion includes the addition of an en-suite, the need for plumbing and electrical works will have to be a big cost consideration.

Again, the cost for this extra work will depend on the scope of what’s involved, so it’s advisable to speak to the experts when working on your budget.

 

Design, fixtures and fittings

Those redesigning their attic as a habitable space will often have very specific ideas surrounding the design and overall look of the area. It is therefore important to keep an excess lump sum aside to cover the cost of design, furniture and more, so that you are free to create the space you’ve been envisioning, without having to cut corners.

 

Additional costs

Once all of the above areas have been budgeted for, it’s also important to keep in mind the additional costs that will crop up, such as those associated with regulatory compliance and planning permission.

If you’re unsure of what this will entail, it’s time to talk to the experts.

 

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Discuss attic conversion costs with AtticPlanning.ie

If you’re looking to achieve your dream attic but are unsure about the costs involved, it’s time to chat to AtticPlanning.ie. With a 99% success rate, we have been proudly converting attics in Irish homes for more than two decades.

Backed by JEArchitecture, a registered architectural practice with over two decades of experience, we specialise in attic conversions that require planning permission. Our team of experts has a proven track record for helping homeowners navigate the complexities of planning regulations, bringing their ideal attic conversion vision to life.

From providing free quotes for a range of attic conversion solutions to offering a reputable and nationwide service, we’ve got you and your attic transformation covered from the start of the process to the end result.

Why choose us for your attic conversion?

  • Unparalleled expertise: We have built up extensive experience working with various county and city councils, making us specialists in attic planning issues.
  • Comprehensive guidance: We offer advice on all aspects of the design and planning application process, ensuring a seamless and successful experience.
  • Client-centric approach: We keep you informed at every stage, providing clear explanations of planning restrictions to maximise your chances of approval.
  • Proven results: Our 99% success rate and over 400 completed attic conversions speak for themselves.

To find out more about how we can help you start to transform your attic into a functional and beautiful living space, contact our team today!

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