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Preoptima

Software for whole-life carbon assessment of buildings at concept stage.

Preoptima provides software for whole-life carbon assessment, capturing both embodied and operational emissions across a building life cycle, referencing EN 15978 and the RICS professional statement on Whole Life Carbon Assessment.

Why we listed them

Listed as software, not consultancy. It names EN 15978 and the RICS statement as its basis and works at concept stage, which is when whole-life carbon decisions are still cheap to change.

We selected this listing ourselves. Nobody paid for it, and nothing was promised in exchange.

Compiled from their own published information in August 2026. We re-check listings annually. Tell us if anything here is out of date.

Listings are not recommendations, endorsements or an assurance of quality, and we do not verify providers’ claims. Nothing here influences our emission factors, methodology or calculator results.

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