Hackbridge Primary Passivhaus

Hackbridge Primary (Sutton) was completed as one of the UK's first Passivhaus-certified primary schools. Published outturn capital costs commonly cited in Passivhaus Trust case-study material sit in the £2,000 to £2,400 per m2 range for the period, indexed to 2026 prices.

External-wall U-value below 0.15 W/m2K, roof below 0.10, triple-glazed windows around 0.85, airtightness target below 0.6 ACH at 50 Pa, MVHR with greater than 85 per cent heat recovery.

Published Passivhaus Trust comparators place the Passivhaus capital uplift at 5 to 15 per cent over an equivalent baseline new-build, recovered in lifetime running costs.

Hackbridge's published in-use heating demand is materially below DfE benchmark for primary schools, validating the design-day calculation. Detailed monitoring data is in Passivhaus Trust case studies.