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Cost to build an eco friendly house
We're looking at self build and want it as green as possible, solar, heat pump, decent insulation. How much does going eco really add to the build cost per square metre? Anyone got first hand experience here? Even percentages would help out
Expert Trade Answers
"Hi Greg,
From my experience, the cost can vary quite a lot depending on the size and specification of the house. A good-quality insulation system, air-tightness, solar panels and a heat pump will usually add to the initial build cost, but they can significantly reduce energy bills in the long term.
As a rough guide, I would allow around 10–20% extra compared with a standard build, depending on the level of eco specification you choose.
I’d be happy to discuss it further if you have the size and plans of the house."
From my experience, the cost can vary quite a lot depending on the size and specification of the house. A good-quality insulation system, air-tightness, solar panels and a heat pump will usually add to the initial build cost, but they can significantly reduce energy bills in the long term.
As a rough guide, I would allow around 10–20% extra compared with a standard build, depending on the level of eco specification you choose.
I’d be happy to discuss it further if you have the size and plans of the house."
Answered on 21st Aug 2026 - Member since May 2025 -
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