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FixMyBER

Home energy upgrades in Mayo

SEAI’s grants are the same everywhere. The homes are not. Here is what 6,608 published BERs say about homes in Mayo, who SEAI registers to do the work here, and where to start.

Homes in Mayo, from their BERs

Attic short of the grant standard
83%
Heat loss 2.3 or lower
41%
Commonest heating
oil, 71%
Commonest walls
filled cavity, 67%

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 Mayo by type and age
HomeBERsWalls, most oftenAttic shortHeat loss ≤ 2.3
Detached house, before 1940803solid stone or brick 87%97%3%
Detached house, 1940–1969661solid stone or brick 53%91%2%
Detached house, 1970–1989710filled cavity 64%77%7%
Detached house, 1990–2004893filled cavity 94%87%40%
Detached house, 2005–2010483filled cavity 91%91%81%
Semi-detached house, 1940–1969184solid stone or brick 56%94%11%
Semi-detached house, 1970–1989270filled cavity 64%73%30%
Semi-detached house, 1990–2004855filled cavity 96%84%61%
Semi-detached house, 2005–2010586filled cavity 88%85%96%
Mid-terrace house, before 1940235solid stone or brick 81%94%17%
Mid-terrace house, 1990–2004153filled cavity 92%84%91%
Apartment, 1990–2004320filled cavity 68%49%69%
Apartment, 2005–2010455filled cavity 70%57%81%

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 Mayo

961 companies on SEAI’s registers serve Mayo; 19 are One Stop Shops. Registration is a fact about paperwork; SEAI does not endorse their work, and neither do we.

  • Attic insulation306
  • Cavity wall insulation75
  • Internal wall insulation292
  • External wall insulation105
  • Windows and doors204
  • Heat pumps237
  • Solar panels310
  • Heating controls215
  • Solar hot water90

The companies in Mayo, with their websites

Where to start in Mayo

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?