How Much Does a Garden Room Cost in Ireland?
A fully insulated, turnkey garden room typically costs €24,000–€130,000 including VAT, depending on size and specification. Here are the typical price ranges, exactly what’s included, what moves the figure up or down, and how to get a clear, no-obligation quote for your build across Dublin & Leinster.
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Garden Room Prices in Ireland
Typical turnkey ranges from recent Modern Garden Rooms builds, including VAT. The figure you see is the finished room, not a shell. Pick the row closest to what you have in mind, then book a free site visit for a written quote.
| Room type | Typical size | Typical turnkey price | What moves the price |
|---|---|---|---|
| Compact garden officeA fully insulated, year-round home office with sliding doors, electrics, heating and a finished interior.Garden offices | 10–15 m² | €24,000–€32,000 | Glazing size, cladding choice and site access. |
| Standard garden roomThe most common build: a gym, studio, office or family room with full-height glazing and a bespoke finish.Garden gym rooms | 15–25 m² | €32,000–€48,000 | Reinforced gym floors, extra windows, roof lights and higher-spec finishes. |
| Large or multi-room buildUp to the 30 m² planning-exempt limit, with internal walls, a WC or shower room, or a golf-simulator bay.Golf simulator rooms | 25–30 m² | €48,000–€65,000 | Plumbing, extra ceiling height, AV and covered outdoor areas. |
| 45 m² garden homeA self-contained one- or two-bedroom garden home or granny flat with a kitchenette, bathroom and living space.45 m² garden homes | Up to 45 m² | €90,000–€130,000 | Layout, kitchen and bathroom specification, and services connections. |
10–15 m²
Compact garden office
€24,000–€32,000
A fully insulated, year-round home office with sliding doors, electrics, heating and a finished interior.
Moves the price: Glazing size, cladding choice and site access.
Garden offices15–25 m²
Standard garden room
€32,000–€48,000
The most common build: a gym, studio, office or family room with full-height glazing and a bespoke finish.
Moves the price: Reinforced gym floors, extra windows, roof lights and higher-spec finishes.
Garden gym rooms25–30 m²
Large or multi-room build
€48,000–€65,000
Up to the 30 m² planning-exempt limit, with internal walls, a WC or shower room, or a golf-simulator bay.
Moves the price: Plumbing, extra ceiling height, AV and covered outdoor areas.
Golf simulator roomsUp to 45 m²
45 m² garden home
€90,000–€130,000
A self-contained one- or two-bedroom garden home or granny flat with a kitchenette, bathroom and living space.
Moves the price: Layout, kitchen and bathroom specification, and services connections.
45 m² garden homesWhat a turnkey price includes
- Design, drawings and a free site visit
- Foundations and groundworks
- Fully insulated timber-frame structure, roof and cladding
- Thermally efficient aluminium doors and windows
- Electrics: sockets, LED lighting and consumer unit
- Heating
- Plastered, painted interior and flooring
- Guttering, drainage and external finishing
- VAT
Quoted separately
- Bathroom, WC or kitchenette plumbing
- Planning applications where a build is not exempt
- Furniture, gym equipment or golf simulators
Ranges are typical figures from recent builds across Dublin and Leinster. Every room is bespoke, so your written quote after a free site visit is the only figure that is actually yours.
What Shapes a Garden Room’s Cost
A garden room is priced on what goes into it. These are the things that move the figure up or down — and what we walk through with you on your free site visit.
Size & layout
Footprint is the biggest driver — a compact office costs far less than a large multi-room build with internal walls.
Insulation & spec
A fully insulated, year-round room costs more than a summer-only structure, but it's what makes the space usable every day.
Glazing, doors & windows
Large sliding doors, extra windows and roof lights add light and cost; thermally efficient aluminium systems sit above basic units.
Foundations & groundworks
Ground conditions, levels and access affect the base and prep work needed before the room itself goes up.
Electrics, heating & finish
Sockets, LED lighting, heating and the interior finish are included in a turnkey build — higher-end finishes cost more.
Bathroom or ensuite
Adding plumbing for a WC, shower or ensuite (common in guest rooms) is a notable extra over a single-room build.
How garden room plumbing worksSite access
Tight side access, slopes or long carries mean more time on site, which can affect the overall price.
Bespoke design & extras
Custom cladding, covered overhangs, swim-spa shelters, AV and built-in storage are all options that shape the final figure.
Different Rooms, Different Costs
What you'll use the room for changes what drives its price. Explore each room type for the detail.
Is a Garden Room Worth It?
For most homeowners the answer is a clear yes — a garden room is one of the most cost-effective ways to add real, year-round space.
- Adds usable space — and value — to your home
- Faster and less disruptive than a traditional extension
- No ongoing rent for office or studio space
- Built to last and used all year, not just in summer
Most Builds Need No Planning Permission
Since July 2026, garden rooms up to 30 m² and 3 m high are usually exempt from planning permission — so there's no application cost or delay. We confirm the rules for your site during your free visit.
Where a build does need permission, the application fee for a domestic extension is €34 and a decision is normally due within 8 weeks, as set out in our planning permission statistics for Ireland.
How We Price Your Garden Room
We visit your garden, measure up, and talk through exactly what you want. Then you get an honest, written quote for the finished room — no pressure, no obligation. It's the only way to get a price that's actually yours.
Garden Room Cost Questions
How much does a garden room cost in Ireland?
A fully insulated, turnkey garden room from Modern Garden Rooms typically costs €24,000–€130,000 including VAT. A compact garden office starts from around €24,000, a standard 15–25 m² room from €32,000, and a self-contained 45 m² garden home from €90,000. Every build is bespoke, so a free site visit and written quote gives you the exact figure.
What does the price per square metre work out at?
Because foundations, glazing, electrics and the bathroom or kitchen are fixed costs that don't scale with floor area, smaller rooms cost more per square metre than larger ones. A turnkey quote is a more reliable guide than a per-m² rate, which is why we price each room on what actually goes into it.
Is a garden room cheaper than a house extension?
In most cases, yes. A garden room is typically faster to build, needs less groundwork and causes far less disruption to your home than a traditional extension.
Do garden rooms add value to your home?
Yes — a well-built, insulated garden room is increasingly seen as a valuable, long-term property upgrade, especially as a home office or extra living space.
Does the price include groundworks and electrics?
We quote a turnkey price that covers design, foundations, the build, insulation, electrics and the interior finish — so the figure you get is the finished room, not a starting shell.
Are there payment or finance options?
Flexible payment options may be available depending on your build — contact us and we'll talk you through what's possible.
Will I need planning permission, and does that add cost?
Most garden rooms up to 30 m² and 3 m high are exempt from planning permission since July 2026, so there's no application cost. We confirm this for your site during your free visit. See our planning guide for the full rules.
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