phi Low Carbon was established in 2021 by Jeremy Poulter and Sara Darwin to specialise in low energy and low carbon consultancy for both new build and retrofit projects.

Our aim is to support clients, contractors and architects achieve the highest standards for both operational energy and embodied carbon including Passivhaus, EnerPHIT, AECB Carbonlite, RIBA 2030 Challenge, LETI and the UK Net Zero Building Standard.

Both Jeremy and Sara have run their own successful architectural practices and both are Certified Passivhaus Designers. Jeremy and Sara also continue to practice as architects through their sister company phi architects