New builds (2025–2026)
680
CSO NDQ06 Completions
680 new homes completed in Donegal in 2025 (451 one-off detached builds) plus 653 in Q1–Q3 2026 — almost all fitted with 35°C heat-pump underfloor heating.
Underfloor heating installation in Co. Donegal
Installing wet hydronic underfloor heating in Co.
Free, no obligation. One vetted local installer prices your floor — never shared with a calling list.
- €65–€95/m²wet UFH + 50mm screed installed in Co. Donegal
- 680new homes built in Co. Donegal in 2025 (CSO)
- 67%of Co. Donegal homes on oil boilers (retrofit market)
- 2,211 HDDannual heating degree days in Co. Donegal
Local figures that shape underfloor heating in Co. Donegal
Official CSO housing completions, Census central-heating fuel split, EPA radon measurements and Met Éireann heating degree days for Co. Donegal.
Oil vs gas heating
67%
Households on Heating Oil
67% of Donegal homes use oil central heating and 1% use mains gas (Census 2022) — prime candidates for blending-valve extensions or heat pump upgrades.
Pre-1981 floor slabs
33%
Built Before 1981
20,060 occupied dwellings in Co. Donegal (33%) pre-date 1981 floor insulation standards, suited to 15mm–18mm insulated overlays or full slab dig-outs.
Renewable adoption
20%
Homes With Renewables
12,325 households in Co. Donegal (20%) already use a renewable heat or solar source on Census 2022 data.
EPA radon >200 Bq/m³
5%
Of 1,784 Homes Tested
92 homes tested by the EPA in Co. Donegal (5%) exceeded the 200 Bq/m³ reference level (peak 3,400 Bq/m³) — critical when digging out older slabs.
Winter heat demand
2,211
Heating Degree Days / Yr
Calculated from Met Éireann's 1991–2020 climate grid across Co. Donegal (base 15.5°C), governing 100mm vs 150mm pipe-centre design.
Choosing the right underfloor heating build-up for Donegal homes
- New builds & one-off houses in Co. Donegal (451 built in 2025): Standard ground-floor build-up uses 120mm–150mm of foil-faced PIR insulation (achieving Part L U-value ≤ 0.15 W/m²K), 500-gauge polythene slip membrane, 16mm PE-Xa oxygen-barrier pipe clipped at 150mm centres (100mm in bathrooms), and 50mm pumped anhydrite or cementitious liquid screed (€65–€95/m² complete). See liquid screed for underfloor heating.
- Kitchen-diner extensions on Donegal's oil (67%) & gas (1%) homes: You can run a new wet underfloor heating manifold directly off your existing condensing oil or gas boiler by fitting a €340–€420 thermostatic mixing pump pack at the manifold, stepping 70°C radiator water down to 40°C–45°C while keeping upstairs radiators untouched. See manifolds & multi-zone controls.
- Renovating pre-1981 homes (33% of Co. Donegal housing stock): Where ceiling height is fixed and the slab is sound, a 15mm–18mm castellated low-profile overlay (€85–€125/m²) avoids breaking concrete. Where a pre-1981 bungalow or cottage has damp uninsulated concrete on soil — and noting that 5% of EPA-tested homes in Donegal measured at or above 200 Bq/m³ — a full floor dig-out lets you install a certified radon barrier/sump, 150mm PIR insulation and wet underfloor heating at the original floor level. See retrofit & low-profile underfloor heating.
- Heat pump upgrades & SEAI grants in Co. Donegal: Pre-2021 homes switching to an air-to-water heat pump qualify for up to €14,500 under the SEAI Heat Pump System Grant, including up to €2,000 towards underfloor heating emitter installation. See heat pump underfloor heating & SEAI grants.
| Installation type in Co. Donegal | Supply & fit rate per m² | Typical 60 m² project in Donegal |
|---|---|---|
| Wet hydronic + 50mm liquid screed (new build / extension) | €65–€95/m² | €3,900–€5,700 |
| Wet hydronic pipework, manifold & room stats only | €40–€65/m² | €2,400–€3,900 |
| Low-profile 15mm–18mm retrofit overlay system | €85–€125/m² | €5,100–€7,500 |
| Dust-free diamond screed milling (into existing screed) | €70–€105/m² | €4,200–€6,300 |
| Electric bathroom heating mat (150W/m² + touch stat) | €45–€75/m² | €350–€600 (for 5 m² bath) |
Calculate your Co. Donegal installation cost
Pick your floor area and system type to see typical 2026 Irish supply-and-install pricing.
Estimated Irish Supply & Fit Range
€5,850 to €8,550
90 m² at €65 to €95 per m² (2026 Irish supply-and-install guide rate, incl. 13.5% VAT).
- Includes manifold, actuators, room thermostats & 6-bar pressure test.
- Eligible for 13.5% reduced VAT on supply-and-fit residential contracts.
- Up to €2,000 SEAI Central Heating Grant when paired with an eligible heat pump.
Underfloor Heating Installation coverage across every town in Co. Donegal
Click your town or Eircode routing key below to get a fast local price for your property in Co. Donegal.
Select your town, suburb or Eircode routing area in Co. Donegal below to pre-fill your location and open our quick 30-second quote check:
Local underfloor heating installation coverage across Co. Donegal includes Letterkenny, Buncrana, Ballybofey & Stranorlar, Donegal Town, Ballyshannon, Bundoran, Carndonagh, Gweedore & Derrybeg, as well as Lifford, Moville & Greencastle, Killybegs, Ramelton & Milford, Dungloe, Raphoe & Convoy, Muff & Burnfoot, Ardara & Glenties and surrounding rural townlands.
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Tell us about your floor and heat source. Your request goes to one vetted underfloor heating installer covering your county, who rings you back to discuss pipe spacing, manifold zones and screed depth before giving a written quote.
Underfloor heating installation guides & specifications
Detailed Irish engineering & cost guides covering pipe spacing, manifold balancing, 15mm retrofit overlays, 35°C heat pump commissioning and floor coverings.
Cost & Pricing GuideUnderfloor heating installation cost (2026)2026 Irish supply-and-fit rates per m² for wet hydronic, low-profile overlay, electric mats, manifolds & liquid screed.Read technical guide →Wet vs Electric ComparisonWet hydronic vs electric heating matsHydronic water pipework (€65–€95/m²) vs 150W–200W/m² electric bathroom heating mats (€45–€75/m²) compared.Read technical guide →Renovation & Overlay GuideLow-profile 15mm–18mm retrofit systems15mm–18mm castellated overlay boards, dust-free diamond screed milling & ground-floor dig-outs for renovations.Read technical guide →Heat Pump & SEAI Grant Guide35°C heat pump design & €14,500 SEAI grantDesigning 35°C flow temperature loops for SCOP 4.0+ efficiency and claiming up to €14,500 in SEAI heat pump grants.Read technical guide →Manifolds & Multi-Zone ControlsManifold port sizing, L/min balancing & statsSizing 2- to 12-port stainless manifolds, sight-glass L/min balancing, 230V actuators and smart room thermostats.Read technical guide →Floor Coverings & Liquid ScreedBest flooring Tog guide & 50mm liquid screedPorcelain tiles, 14mm engineered oak, LVT and low-tog carpet compared by thermal resistance and 27°C probe rules.Read technical guide →
More technical resources: Liquid screed for underfloor heating · All guides & calculator hub · Technical trade glossary (A–Z) · Frequently asked questions · All 26 counties covered
Underfloor heating installation in Co. Donegal: FAQ
How much does underfloor heating installation cost in Co. Donegal?
In Co. Donegal, complete wet hydronic underfloor heating with 50mm pumped liquid screed costs €65 to €95 per m² (€40 to €65 per m² for pipe, manifold and thermostats before screed). Low-profile 15mm–18mm retrofit overlays cost €85 to €125 per m², and electric bathroom heating mats cost €45 to €75 per m².
Can I connect new underfloor heating in a Donegal extension to my existing oil or gas boiler?
Yes — 67% of households in Co. Donegal heat with oil and 1% with mains gas. Fitting a thermostatic blending valve and circulation pump set (€340–€420) on the new manifold steps the boiler water down to 40°C–45°C for the extension floor while your existing radiators stay on their own zone.
Is there an SEAI grant for underfloor heating in Co. Donegal?
Pre-2021 homes in Co. Donegal upgrading to an air-to-water heat pump can claim up to €14,500 (€11,500 for apartments) through the SEAI Heat Pump System Grant, which includes up to €2,000 (€1,000 for apartments) specifically towards installing underfloor heating or new radiators.
Which towns in Co. Donegal are covered for site surveys and installation?
One vetted underfloor heating installer covers the whole of Co. Donegal, including Letterkenny, Buncrana, Ballybofey-Stranorlar, Carndonagh and all surrounding rural parishes.
Underfloor heating installation across all 26 counties
Every quote request is routed to one vetted underfloor heating installer covering your county — from Dublin, Cork, Galway and Limerick to Kildare, Meath, Wicklow, Wexford, Louth, Kerry, Clare, Waterford and Donegal. Pick your county for local housing, heating and radon figures. View full 26-county directory →
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