If you’re asking “how much does it cost to renovate an old house in Ireland?”, you’re not alone. It reflects exactly what thousands of homeowners want to know. Renovating an old house here can be deeply rewarding—full of character and historic charm—but understanding the true cost is key. This guide walks you through realistic figures, fresh insights as of 2025, and practical ways to budget without surprise setbacks.
Why Renovation Costs Vary So Much
Not all old houses are created equal, and neither are their renovation costs. Some are structurally sound and only need cosmetic updates, while others are borderline derelict and require a full rebuild. Here’s why costs can swing dramatically:
- Property condition: A house with dry rot, outdated wiring, or crumbling plaster will cost more to fix than one with good bones.
- Size and layout: The more square metres you’re working with, the higher the cost. Open-plan layouts usually cost more to create, especially if you’re knocking down walls or moving plumbing.
- Location: Building costs in urban areas like Dublin or Cork are generally higher than in rural areas due to labour and contractor demand.
- Scope of the project: Are you renovating a few rooms or gutting the entire house? The broader the project, the bigger the bill.
- Finish level: Mid-range finishes cost a lot less than premium fixtures and bespoke carpentry.
- Planning requirements: Protected structures or listed buildings require specialist materials and may need conservation approval, which adds time and cost.
Cost Per Square Metre: What to Expect in 2025
Let’s talk numbers. In 2025, the average cost to renovate an old house in Ireland can range widely depending on the finish and scope of work. Here’s a rough breakdown:
- Basic refresh (painting, new floors, minor updates): €1,200 to €1,500 per m²
- Mid-range renovation (rewiring, plumbing, layout changes, kitchen and bathroom upgrades): €1,800 to €2,500 per m²
- High-end renovation (luxury finishes, bespoke design, significant structural work): €2,800 to €4,000+ per m²
So, for a 100 m² house, you could be looking at:
- Basic: €120,000–€150,000
- Mid-range: €180,000–€250,000
- High-end: €280,000–€400,000+
Keep in mind these figures don’t always include VAT, contingency, or professional fees, which we’ll get to shortly.
Room-by-Room Renovation Costs
Sometimes it’s helpful to break things down by area rather than looking at the whole house. Here’s a guide to typical renovation costs for key rooms and features:
Kitchen Renovation
Budget kitchen makeover: €10,000–€20,000
- Mid-range renovation with layout changes: €20,000–€40,000
- High-end kitchen with custom cabinets and premium appliances: €40,000–€60,000+
Bathroom Renovation
- Small basic bathroom upgrade: €5,000–€10,000
- Mid-range modernisation: €10,000–€20,000
- Luxury bathroom with custom tiling and fittings: €20,000–€30,000+
Attic Conversion
- Basic attic conversion: €20,000–€35,000
- Conversion with ensuite or dormer windows: €40,000–€60,000
Extensions
- Single-storey rear extension: €1,500–€2,500 per m²
- Two-storey extension: €2,000–€3,000 per m²
These costs vary depending on the size, complexity, and materials used. But they provide a solid foundation for budgeting room by room.
Hidden Costs You Need to Know About
One of the biggest mistakes people make when renovating an old house is not budgeting for the hidden extras. Here are some common costs that can sneak up on you:
- Professional fees: Architects, engineers, and surveyors typically charge 8% to 15% of the total build cost.
- Planning permission: Not all works require it, but if your property is protected or the changes are significant, expect delays and additional costs.
- Structural surprises: Old houses hide things—woodworm, damp, outdated plumbing, or cracked foundations.
- Temporary accommodation: If the house isn’t habitable during works, you’ll need to rent somewhere else.
- Storage: You may need to rent storage for furniture or personal belongings.
- Contingency fund: Set aside at least 10%–15% of your total budget to deal with unexpected issues. Trust us—you’ll need it.
Period Properties: When Character Comes at a Price
Many older Irish homes have unique character—original fireplaces, sash windows, stone walls—but preserving or restoring these features doesn’t come cheap.
If your house is a listed or protected structure, you’ll likely need to work with conservation specialists and approved materials. This can increase your renovation cost significantly, sometimes pushing the price per square metre well beyond €4,000.
Common costs for period properties:
- Lime plaster repairs: €50–€150 per m²
- Sash window restoration: €800–€2,000 per window
- Roof restoration (natural slate): €15,000–€40,000 depending on size and complexity
While expensive, retaining these features can increase the value of your home long-term—and preserve a piece of Ireland’s architectural heritage.
Ways to Save on Your Renovation Without Cutting Corners
Renovating an old house doesn’t have to mean draining your savings. There are smart ways to reduce costs without sacrificing quality.
- Get multiple quotes – Always compare at least three contractors. The differences can be eye-opening.
- Keep your layout – Moving plumbing, walls, or electrics adds serious cost. If the layout works, keep it.
- DIY what you can – Painting, garden clearance, or even fitting basic fixtures can shave thousands off your budget.
- Reuse and repurpose – Salvage original doors, floorboards, or tiles where possible.
- Phase the project – Tackle essential areas first, and spread out the rest over time if needed.
- Go for mid-range finishes – You don’t need marble or Italian taps to have a stylish, long-lasting home.
Are There Grants Available?
Yes—especially if you’re renovating an older home to make it safer or more energy-efficient.
Depending on your age, income, and the works involved, you might qualify for:
- Grants for energy upgrades like insulation, heat pumps, or solar panels
- Housing Aid for Older People (for those aged 66+ or with disabilities)
- Vacant Property Refurbishment Grants if you’re bringing an unused home back into use
These grants can help cover a chunk of your budget—often thousands of euro—so it’s worth checking with your local authority or SEAI.
Summary: What You Really Need to Know
- Renovation costs in Ireland range from €1,200 to €4,000+ per m² depending on the finish, property condition, and location.
- A full renovation for a 100 m² house will typically fall between €150,000 and €250,000.
- Room-by-room costs: Kitchens and bathrooms are the biggest ticket items, while extensions and attic conversions vary depending on complexity.
- Hidden costs and contingency funds are essential—don’t underestimate them.
- Grants are available, especially for energy upgrades or older homeowners.
- Smart choices—like keeping your layout, getting multiple quotes, and doing some of the work yourself—can help manage the budget without compromising quality.
Renovating an old house in Ireland is more than just a project—it’s a journey into the past and a chance to create a home full of personality and charm. With the right planning, clear budgeting, and realistic expectations, it can also be a financially smart investment.
If you’re beginning that journey, it helps to have the right people beside you. OS Holding, a leading building contractor in Dublin, specialises in turning old homes into beautifully modern spaces—without losing their original charm. With a dedicated project manager, transparent planning, and years of renovation experience, we make the process smooth from start to finish.
Whether you’re reimagining your kitchen, converting an attic, or undertaking a full-scale restoration, we bring quality, reliability, and peace of mind to every stage. Get in touch with us today and take the first confident step toward transforming your home.
