A sunroom is the extension most Irish homeowners underestimate, because the brochure price and the finished price are two different numbers. The frame, the roof, and the glazing are what a supplier quotes. The foundation, the electrics, the heating, and the floor are what turn it into a room you can use in a Wexford January — and those are often left off the headline figure entirely. The sunroom cost in Ireland in 2026 spans a wide band as a result, from around €8,000 for a basic conservatory to €55,000 for a premium orangery, and where you land is decided mostly by one component: the roof.
That is the number that matters, and it is not the one on the showroom tag. A glazed conservatory roof and an insulated warm roof produce two very different rooms at two very different prices, and the difference between a space you use three months a year and one you use twelve is mostly decided there.
A sunroom's price is set by its roof. A glazed roof buys a summer room; a warm roof buys a whole year.
What follows is what a sunroom actually costs in Ireland in 2026 — the bands, the difference between a sunroom, a conservatory and an orangery, what moves the number, the costs the quote leaves out, and where planning permission does and does not apply. The figures are indicative market ranges: a planning baseline to measure a real quote against, not a quote in themselves.
How much does a sunroom cost in Ireland in 2026
The cost falls into four broad bands, and knowing which one a project belongs to is the first piece of planning discipline. Irish suppliers describe the market in roughly these terms in 2026:
- Basic conservatory — €8,000 to €15,000. A uPVC frame with a polycarbonate roof. The cheapest way to add glazed space, and the one that is too cold in winter and too hot in summer, because the roof does nothing to regulate temperature.
- Mid-range conservatory — €15,000 to €25,000. Better frames and a glass roof rather than polycarbonate. More comfortable and better looking, but still a largely glazed room that leans seasonal without serious heating.
- Insulated sunroom — €18,000 to €35,000. A solid, insulated "warm roof" over a partly glazed room. This is the tier that turns a seasonal conservatory into a year-round room, and it is where most homeowners who want usable space land.
- Premium orangery — €30,000 to €55,000 and beyond. Brick or rendered pillars, a flat insulated roof with a glazed lantern, and high-specification glazing. The most substantial and most expensive, and closest to a true single-storey extension.
Expressed by area, a builder's sunroom extension typically runs €1,000 to €2,000 per square metre, while a conservatory or orangery starts nearer €2,000 and can reach €4,000 or more per square metre once the glazing and roof specification climb. Dublin projects commonly run fifteen to twenty percent above the national figure. A sunroom is one of several ways to extend and improve a home, and how it sits against a wider budget is covered in the cost to renovate a house in Ireland.
Get your project cost baseline first
The free Irish Renovation Cost Calculator gives you a trade-by-trade estimate in under 5 minutes — before your first supplier conversation. It puts the build and its hidden lines side by side, so the showroom price is measured against a number of your own.
Sunroom, conservatory, or orangery — what you are paying for
The three words are used loosely, but they describe genuinely different rooms, and the difference is mostly in the roof and the walls. A conservatory is predominantly glazed — glass walls and, at the better end, a glass roof — which is why it is the cheapest and the most seasonal: it heats and cools with the weather. A sunroom keeps large windows but puts a solid, insulated roof on top, which is the single change that makes the room usable across an Irish winter. An orangery goes further again — solid pillars, a flat insulated roof with a glazed lantern in the centre — and reads as part of the house rather than an addition bolted to it.
The practical takeaway is that "sunroom" versus "conservatory" is not just a naming choice; it is a specification choice with a real cost and a real consequence for how many months of the year you actually use the space. Paying conservatory money and expecting sunroom performance is the most common disappointment in this category — the glazed roof that looked like a saving is the reason the room sits empty from October to March.
If you are choosing between the three rather than pricing one, our full comparison of a sunroom vs conservatory vs orangery in Ireland weighs them on cost, BER and planning.
Choose the roof before you choose anything else. A polycarbonate or glass roof buys a seasonal room; an insulated warm roof buys a year-round one, and it is the largest single line in the difference between the tiers.
Everything else — frame colour, glazing, flooring — is a refinement on top of that one decision.
What drives the cost up or down
Beyond the roof, four things move a sunroom's price more than anything else, and understanding them lets you read the gap between a €15,000 quote and a €35,000 one in the specification rather than discovering it later.
The roof, again. It is worth repeating because it is the biggest lever: polycarbonate is cheapest, glass sits in the middle, and a solid insulated warm roof is the most expensive and the most transformative. Most of the jump between the tiers above is this line.
The size and the glazing. Floor area scales the frame, the glass, the roof, and the base together, and the glazing specification — double versus triple, standard versus solar-control — moves both the comfort and the cost. A larger room in higher-specification glass climbs on both counts at once.
The base and the ground conditions. Every sunroom needs a proper foundation, and what the ground beneath it is doing decides how much that costs. Level, stable ground is straightforward; a sloping garden, poor soil, or drainage to divert turns the base from a routine line into a significant one.
The finish level. Underfloor heating, quality flooring, integrated lighting, and bi-fold or sliding doors are all real costs that the frame-and-roof quote usually excludes, and they are the difference between a shell and a finished room — which is exactly what the next section is about.
The costs the quote leaves out
The single most common reason a sunroom costs more than the homeowner expected is that the supplier's quote priced the structure, not the room. A typical conservatory or sunroom quote includes the frame, the roof, the glazing, and the installation — and frequently excludes the four lines that turn that structure into somewhere you can live.
The first is the foundation. A concrete base and footings add roughly €3,000 to €6,000 depending on ground conditions, and it is not optional — the room sits on it. The second is electrics: sockets, lighting, and any switching have to be installed and, where new circuits are involved, certified by a Safe Electric registered electrical contractor. The third is heating: extending the existing system, adding underfloor heating, or fitting electric heating is what makes a warm-roof sunroom actually warm, and it rarely appears on the glazing quote. The fourth is the floor: screed, insulation, and the finished flooring are a room-sized cost the structure price ignores.
Add those four and a €20,000 structure becomes a €28,000 to €30,000 finished room. A quote that lists them is being honest; a quote that is silent on them is leaving you to find them later. VAT belongs in the sum too — renovation and construction services in Ireland are generally charged at the reduced 13.5% rate under Revenue's two-thirds rule, provided the materials do not exceed two-thirds of the total, so always confirm whether the price is VAT-inclusive. The consumer-contract framework behind any Irish build is published by the Competition and Consumer Protection Commission, and the same read-the-exclusions discipline is set out in how to read a renovation quote.
Do you need planning permission for a sunroom
Often not, but it depends on the size and where it goes. In Ireland, a single-storey sunroom or conservatory to the rear of a house is generally exempted development — meaning no planning permission is required — provided the floor area, combined with any previous extension, does not exceed 45 square metres (raised from 40 square metres on 27 July 2026 by S.I. No. 338 of 2026) and the project meets the height and private-open-space conditions that come with the exemption. Citizens Information sets out the current exempted-development rules.
Two conditions catch homeowners out. The first is that the exemption is for rear extensions at ground level — a front or side sunroom, or a two-storey one, is a different question. The second is a glazing rule at the boundary: glazing facing a neighbour within one metre of the boundary is generally not permitted, which is usually solved by building a solid wall on that side and glazing the rest. Whether or not planning permission applies, the work still has to meet the Building Regulations, so confirm your specific project against the exempted-development limits and your local authority before you order — the same front-loaded discipline that runs through The 12-Phase System. The full exemption map for Irish home works — what needs permission, what is exempt, and the €80 Section 5 route to certainty — is set out in planning permission for a renovation in Ireland.
Where a sunroom project should start
It starts with the roof decision and an honest total — structure plus foundation, electrics, heating, and floor — before the first supplier walks the garden. The homeowner who knows they want a warm-roof sunroom of a certain size, who has budgeted the base and the finishes, and who has confirmed the project is exempt from planning permission is the homeowner a supplier prices accurately. The homeowner who asks only for "the price of a sunroom" gets the structure price, and finds the rest as it arrives.
That whole-project view — the visible structure and the hidden lines, sequenced and costed before anyone quotes — is the operating principle of The 12-Phase System, Property Blueprint Co.'s framework for running any renovation or addition from the first quote conversation to a finished, compliant result without paying the premium the unprepared homeowner pays. A sunroom is a small project by that measure, but it rewards the same discipline: decide the roof, price the full room, confirm the planning position, and read the quote for what it leaves out. The garden side of that scope — patios, landscaping, and where the sunroom meets the outdoor space — is in the garden renovation cost guide.
See the Renovation Blueprint systems
Every phase of a renovation or addition with the hidden costs in their place — the base, the services, the finishes, and the quote-reading that keeps a structure price from becoming a finished-room surprise.
If the cost baseline is the right first step, use the free Irish Renovation Cost Calculator — a trade-by-trade estimate for your specific project, in under 5 minutes, before any supplier has quoted.
Frequently asked questions
How much does a sunroom cost in Ireland in 2026?
A basic uPVC conservatory with a polycarbonate roof runs €8,000 to €15,000, a mid-range conservatory with a glass roof €15,000 to €25,000, an insulated warm-roof sunroom €18,000 to €35,000, and a premium orangery €30,000 to €55,000 and beyond. By area, a builder's sunroom runs €1,000 to €2,000 per square metre and a conservatory or orangery €2,000 to €4,000-plus. Dublin projects run fifteen to twenty percent above the national figure, and the roof type is the biggest single driver of where a project lands.
What is the difference between a sunroom, a conservatory, and an orangery?
A conservatory is predominantly glazed, with glass walls and often a glass roof, which makes it the cheapest and the most seasonal. A sunroom keeps large windows but adds a solid, insulated roof, which is the change that makes it usable across an Irish winter. An orangery goes further with solid pillars and a flat insulated roof with a glazed lantern, reading as part of the house. The roof and the walls are where the difference — and the cost — mostly sit.
Why does a warm-roof sunroom cost more than a conservatory?
Because the insulated warm roof is a substantially more expensive component than a polycarbonate or glass roof, and it is the single line that turns a seasonal glazed room into one you can use all year. Most of the jump between the conservatory tiers and the sunroom tier is this one decision. Paying conservatory money and expecting year-round comfort is the most common disappointment in this category.
What costs are usually left out of a sunroom quote?
Four lines are commonly excluded from the frame-and-roof quote: the foundation, at roughly €3,000 to €6,000 depending on ground conditions; the electrics, which must be certified by a Safe Electric registered contractor where new circuits are added; the heating that makes the room usable; and the finished floor, including screed and insulation. Add them and a €20,000 structure becomes a €28,000 to €30,000 finished room, so read the quote for what it does not include.
Do you need planning permission for a sunroom in Ireland?
Often not. A single-storey rear sunroom or conservatory is generally exempted development — no planning permission required — provided its floor area, combined with any previous extension, does not exceed 45 square metres and it meets the height and open-space conditions. A front or side sunroom, or one that exceeds the limits, needs an application. Glazing facing a neighbour within one metre of the boundary is generally not permitted. The work must still meet the Building Regulations, so confirm your project with your local authority before ordering.
What VAT rate applies to a sunroom in Ireland?
Construction and renovation services in Ireland are generally charged at the reduced 13.5% VAT rate rather than the standard 23%, under Revenue's two-thirds rule, provided the cost of the materials does not exceed two-thirds of the total price. Because a glazed sunroom can be materials-heavy, the rate is worth confirming, and you should always check whether the quoted figure is VAT-inclusive before comparing it against another.