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FixMyBER

Home energy upgrades in Donegal

SEAI’s grants are the same everywhere. The homes are not. Here is what 7,278 published BERs say about homes in Donegal, who SEAI registers to do the work here, and where to start.

Homes in Donegal, from their BERs

Attic short of the grant standard
89%
Heat loss 2.3 or lower
36%
Commonest heating
oil, 78%
Commonest walls
filled cavity, 64%

A heat loss indicator of 2.3 or lower is what lets a home built before 2007 skip the technical assessment for a heat pump grant. Check yours

Published BERs for homes in Donegal by type and age
HomeBERsWalls, most oftenAttic shortHeat loss ≤ 2.3
Detached house, before 1940795solid stone or brick 81%98%1%
Detached house, 1940–1969306unfilled cavity 48%92%3%
Detached house, 1970–1989913filled cavity 55%91%5%
Detached house, 1990–20041,496filled cavity 92%96%26%
Detached house, 2005–2010829filled cavity 89%94%80%
Semi-detached house, before 1940218solid stone or brick 83%99%3%
Semi-detached house, 1940–1969159unfilled cavity 48%94%5%
Semi-detached house, 1970–1989225filled cavity 60%91%14%
Semi-detached house, 1990–2004926filled cavity 90%93%61%
Semi-detached house, 2005–2010501filled cavity 90%83%99%
Mid-terrace house, before 1940158solid stone or brick 79%98%2%
Apartment, 1990–2004437unfilled cavity 45%52%68%
Apartment, 2005–2010315filled cavity 62%49%86%

Existing homes assessed since 2019, in groups of at least 150 BERs. SEAI BER Research Tool, file of 8 September 2026. A pattern across homes, not a fact about any one.

Who SEAI registers to work in Donegal

679 companies on SEAI’s registers serve Donegal; 18 are One Stop Shops. Registration is a fact about paperwork; SEAI does not endorse their work, and neither do we.

  • Attic insulation211
  • Cavity wall insulation48
  • Internal wall insulation196
  • External wall insulation76
  • Windows and doors133
  • Heat pumps138
  • Solar panels285
  • Heating controls136
  • Solar hot water57

The companies in Donegal, with their websites

Where to start in Donegal

Worked plans for the commonest age of each type of home here, then your own.

Get the plan for your home

SEAI grant figures as read on 26 September 2026. They are the same in every county. Every grant, and what it pays · What order should a retrofit go in?