Whole-House Retrofit – Traditional Granite Property

By Highlands and Islands Renewables Limited | 07/30/2026

Location: Highlands? Deeside?

Building type: Pre-1900s traditional granite house

Approach: Whole-house, fabric-first retrofit

Project Overview:
A deep retrofit of a traditional granite property, delivered using a fabric-first approach to improve energy performance, comfort and long-term running costs. Works included insulation upgrades, heat pump installation, solar PV and improved ventilation.

Outcomes:

  • EPC rating improved from G to A
  • Annual carbon savings of 2,618 kg
  • Annual energy bill savings of £2,547
  • Significant improvement in comfort and internal temperatures

Why this matters:

This case study demonstrates our ability to deliver complex, whole-house retrofits on traditional northern Scottish building types, the same principles we apply to stone, rubble and moisture homes common to the Highlands and Islands.

“A remote house in the country in the Shetland Isles, Scotland, UK.”
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