If your kitchen is feeling tight, tired, or totally out of sync with modern family life, you’re not alone. Across South Dublin — from Knocklyon to Rathfarnham — more homeowners are opting to extend rather than relocate. But before the dust sheets go down, one big question looms: How much is this going to cost?
Whether you’re dreaming of a bright open-plan kitchen-diner or just need a bit more breathing room, understanding the real cost of a kitchen extension in Dublin is essential. In this guide, we break down the key pricing factors, offer tips on how to keep things affordable, and show you how to get an accurate, no-obligation quote — tailored to your space and style.
From modest single-storey builds to high-spec transformations, Greenoak Construction shares everything you need to know before you build. Let’s dive in.
How Much Should a Kitchen Extension Cost in Dublin?
Expect to pay from €2,500 per square metre for a standard kitchen extension in Dublin. Costs increase with size, finishes, and design complexity.
A basic kitchen extension in South Dublin typically starts around €2,500/m² (excluding VAT). For more bespoke or high-spec finishes, prices may rise to €3,000/m² or beyond. This doesn’t include planning, design fees or premium appliances. Remember to factor in extras like underfloor heating, custom cabinetry and structural work.
How Much Does a 40m2 Kitchen Extension Cost in Ireland?
A 40 square metre kitchen extension can cost between €100,000 and €120,000, depending on materials, design, and specification.
At the base rate of €2,500/m², a 40m2 build will cost approximately €100,000 before VAT and extras. If you’re opting for a more luxurious finish with stone counters, bespoke joinery or smart home features, budget closer to €3,000/m². Greenoak Construction clients often invest in this size of extension to create a full open-plan kitchen, dining and living space that transforms the heart of their home.
How Much for a Kitchen Extension in Ireland Overall?
The total cost for a kitchen extension depends on scope, size, and finish – but most fall between €50,000 and €120,000 in South Dublin.
Greenoak Construction advises budgeting not just for the build itself, but also for:
- Planning permission or exemptions
- Architect or design fees
- Interior finishes: flooring, tiling, lighting
- Kitchen units and appliances
- Heating and ventilation upgrades
- Energy-efficient insulation or BER improvement works
Always ask for a detailed quote that breaks these out, and make sure you understand VAT inclusions.
How Do I Plan My Kitchen Layout?
Start by zoning your space: cooking, prepping, dining, and storing all need clear, intuitive zones to avoid chaos in the kitchen.
The classic “kitchen triangle” (fridge, sink, hob) is still a handy design principle — but modern kitchens demand more. Think of where bins go, where you’ll plug in appliances, and how doors will open without clashing. Don’t forget to leave space to move!
Greenoak’s design process includes 3D visualisations and layout options tailored to how your family cooks and lives. The result? A kitchen that’s as practical as it is beautiful — whether you’re making tea for two or cooking Sunday lunch for ten.
What Is the Cheapest Way to Extend a Kitchen?
Keep it simple: reduce structural changes, use standard finishes, and minimise disruption to the existing layout.
The most affordable kitchen extensions typically involve a modest rear extension with minimal steelwork, straightforward plumbing, and a clean rectangular layout. Consider flat roofs over pitched ones, and standard-sized units rather than custom cabinetry. Choosing a design-build firm like Greenoak can also streamline costs.
Even on a tighter budget, you can still achieve a spacious, light-filled kitchen with clever planning and practical design. It’s about focusing your spend where it counts most: space, light, and flow.
How to Design Your Own Extension?
You can design your own extension by starting with your goals, measuring your space, and sketching possible layouts — but professional input is key.
While Pinterest boards and graph paper are a great starting point, real-world design must factor in site conditions, planning regulations, and buildability. Homeowners often begin with a Wishlist: more light, a better kitchen flow, maybe even a garden view. The next step is translating that into practical dimensions and room connections.
Greenoak Construction offers design-build services, meaning you can bring your ideas, and they’ll help shape them into reality — balancing your vision with structural feasibility and budget. This collaborative approach leads to beautiful, liveable results.
How to Design a Kitchen Addition?
Designing a kitchen addition starts with function: think about how you cook, host, store, and move through the space daily.
The golden rule is: don’t just plan for today — plan for how you’ll live in five or ten years. Do you need a breakfast bar for kids now and a more formal dining area down the line? What about access to the garden, natural light, and connection to other living spaces?
Greenoak’s kitchen additions are tailored to your household’s habits. They’ll help you choose between galley layouts, L-shapes, or U-shapes, guide decisions around skylights and bifolds, and integrate storage so the kitchen works beautifully, day after day.
How Do I Get a Quote for a Kitchen Extension in South Dublin?
Contact trusted local builders and request a free, site-specific quote with no obligation.
Here’s how to begin:
- Find reputable builders – Search for “kitchen extensions Dublin” and review local company portfolios.
- Reach out with project details – Include your location, estimated size, and any initial ideas.
- Arrange a site visit – Most builders will visit free of charge to assess your space.
- Review detailed quotes – Compare based on scope, pricing, materials, and timeframes.
- Ask about extras – Understand what’s included: design, finishes, VAT, planning support.
Greenoak Construction offers free consultations across Knocklyon, Rathfarnham and the wider South Dublin area.
Book your kitchen extension quote today and take the first step towards your dream kitchen.
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