How Much Should You Budget to Renovate a House?

Working out how much to budget for a house renovation is the single biggest question most Irish homeowners wrestle with before picking up the phone to a contractor. It’s the number that decides whether the project is a full gut job, a partial refurb, or a complete rethink of the whole property.

For a full home renovation in Dublin and the surrounding counties, most homeowners should budget somewhere between €150,000 and €400,000, depending on the size of the house, the level of finish, and whether structural work is involved. A minimum of €100,000 is realistic for any meaningful whole-home renovation, and older properties needing rewiring, replumbing, and insulation typically sit at the higher end.

Below, we’ve broken down where the money actually goes, what pushes the price up or down, and how grants like the SEAI One Stop Shop can take a serious chunk off the total cost.

What Drives the Cost of a Full Home Renovation?

Two houses of the exact same size can come in tens of thousands apart, and it’s rarely down to one big thing. It’s usually a stack of smaller decisions that add up.

Here are the main cost drivers we see in nearly every renovation quote.

• Property age and condition. A 1970s semi-detached with original wiring, single-glazed windows, and no insulation will cost far more than a house built after 2006.
• Structural work. Removing load-bearing walls, underpinning, or replacing joists adds cost quickly.
• Level of finish. Standard finishes versus mid-range versus high-end kitchens and bathrooms can swing the budget by €40,000 or more.
• Size in square metres. Renovation costs are usually calculated on a per-square-metre basis, so bigger houses cost more.
• Access and location. Terraced houses in tight Dublin streets can slow work and push labour costs up.
• Compliance work. Fire safety, ventilation, and building regulation upgrades on older homes are non-negotiable and add cost.

Once you know which of these apply to your property, you’ll get a much clearer idea of where in the range your project will land.

Typical Budget Ranges for Irish Home Renovations

It helps to see the numbers grouped by scope. Every project is different, but these ranges reflect what we’re seeing on real Dublin and Greater Dublin renovations in 2026.

Partial Refurb (Cosmetic Plus Some Trades)

This is generally not something we take on as a standalone job, because it rarely delivers good value once you factor in setup costs. However, as a benchmark, expect somewhere between €60,000 and €120,000 for redecoration, new flooring, a kitchen refresh, and light electrical or plumbing updates.

Full Home Renovation (Standard Finish)

A gut renovation of a three-bed semi with new wiring, plumbing, insulation, kitchen, bathrooms, flooring, and decoration typically costs €150,000 to €250,000. This is the sweet spot for most Irish families upgrading a home built between 1970 and 2000.

Full Home Renovation with High-End Finish

Bespoke kitchens, high-spec bathrooms, premium flooring, smart home wiring, and architectural details push a full renovation to €250,000 to €400,000+. Period properties and Victorian redbrick homes often land here because of the restoration work involved.

Renovation Plus Extension

Adding an extension on top of a renovation is common, and it’s where budgets can climb quickly. Extension build costs alone typically run €2,500 to €3,500 per square metre, excluding engineer’s fees.

How Should You Split the Budget Across Trades?

A useful exercise before you commit is to see roughly how the money divides across the project. It stops you from overspending on one area at the expense of another.

Here’s a rough guide for a standard-finish full home renovation.

• Design and planning: 10% to 20% of the total cost.
• Structural and building works: 25% to 35%.
• First fix (wiring, plumbing, insulation): 15% to 20%.
• Kitchen and bathrooms: 15% to 25%.
• Finishes (flooring, painting, doors, joinery): 10% to 15%.
• Contingency: always hold back at least 10% for unexpected issues.

The contingency is the one homeowners skip most often, and it’s the one that catches them out. Old houses hide surprises. Build it into your budget from day one.

Can SEAI Grants Reduce Your Renovation Budget?

Yes, and often by a lot. If your renovation includes energy upgrades, the SEAI Better Energy Homes Scheme and the One Stop Shop pathway can knock a meaningful amount off the total. You can review the current grant amounts and eligibility on the SEAI home energy grants page, which is updated regularly.

Under the 2026 stacking model, individual measure grants can be combined. Here’s a snapshot of where the savings come from.

• Heat pump systems: grants up to €12,500.
• Attic and wall insulation: grants vary by measure and property type.
• Solar PV: separate grant available under the Solar Electricity Grant scheme.
• One Stop Shop deep retrofit: combined grants commonly total €25,000 to €30,000 when multiple measures are done together.

To qualify for the higher combined amounts, the property usually needs to hit a specific BER rating after works, and the upgrades must be delivered by a registered contractor. If energy upgrades are part of your plan, factoring these grants in early can genuinely reshape your budget.

What About Design, Planning, and Feasibility Costs?

One thing homeowners often underestimate is the upfront cost of getting the design and planning right before a spade goes in the ground. Cutting corners here almost always costs more later.

Feasibility Consultation

A proper feasibility check is where any serious renovation should start. It confirms whether your ideas are buildable, what the likely cost range is, and whether planning permission will be needed. Expect to pay €200 for a phone or video consultation, or €500 for a home visit.

Cost and Technical Design

If you already have architect’s drawings, a technical review to pressure-test the design, buildability, and budget starts from €2,500 plus VAT. This can save a fortune by catching problems before construction.

Planning Permission

Not every renovation needs planning permission, but many extensions and structural changes do. Planning fees, drawings, and submissions typically add €3,000 to €8,000 depending on complexity, and the process can add 8 to 12 weeks to the timeline. You can check the basics of the Irish planning system through Citizens Information before you commit.

How Do You Avoid Blowing the Budget?

Most renovation overruns come down to a small number of avoidable mistakes. If you’re serious about staying on budget, watch out for these.

• Choosing the cheapest quote. If one quote is 20% below the others, something is missing from it.
• Skipping feasibility. Jumping to construction without a proper cost and technical review is the fastest way to hit surprises.
• Changing your mind mid-build. Every variation order adds cost and time.
• Ignoring the contingency. Ten per cent minimum, held separately from the main budget.
• Not using a fixed-price contract. Day rates and open-ended pricing rarely favour the homeowner.

A fixed-price contract with a clear scope is the single best tool you have to protect your budget. It makes the contractor responsible for delivering what was agreed, at the price agreed.

Ready to Get a Realistic Number for Your Project?

Budgeting for a house renovation isn’t about picking a figure off the internet. It’s about understanding your property, your goals, and the trade-offs that come with each decision. A short feasibility session usually clears up more questions than weeks of online research.

If you’re thinking about a full home renovation in Dublin, Kildare, Meath, or Wicklow, get in touch to book a feasibility consultation. We’ll give you a straight answer on what’s possible, what it’s likely to cost, and how to make the numbers work.