There is no Planet B.
So we engineer better for this one.
Planet A are independent energy and building-physics engineers. We turn renewable research into buildings, systems and products that cost less to run, stay healthy to live in, and emit almost nothing.
Engineering the buildings a zero-carbon future needs.
From first-principles modelling to retrofit on the ground, we work across the whole energy system — so the answer works in practice, not just on paper.
Building & retrofit
Healthier, warmer, cheaper-to-run buildings. We design out damp, mould and waste with high-performance fabric, smart heat delivery and ventilation.
Renewable energy systems
Renewable heat and power that fits the building and the grid. Whole-system design, smart-grid integration and storage that earns its keep.
Modelling & due diligence
Detailed energy modelling, cash-flow analysis and feasibility you can fund. The numerical rigour that de-risks every decision before you commit.
Research & development
Our R&D engine, in partnership with Verto Homes — prototyping and proving the technologies that make low-carbon building scalable.
We engineer Octopus' zero home energy bills homes.
Planet A are the energy architects behind Verto Homes' zero home energy bills developments — integrating solar, battery storage and heat pumps into every home to meet Octopus Energy's zero home energy bills standard, so residents can pay nothing for the energy they use. As accredited partners, we can certify a home to the zero home energy bills standard.
Zero Bills includes a generous Fair Use Allowance — around twice your home's expected yearly usage, and just a heads-up, EV charging is billed separately. Fair usage limits, terms and exclusions apply. Visit octopus.energy/zero-bills-home for more.
First principles. Real outcomes.
We break complex energy problems down to the physics, then build solutions that are financially and environmentally sustainable.
Understand
We start with your building, your people and your goals — measuring what's really happening before proposing anything.
Model
We model energy flows and cash flows in detail, testing options so you can see cost, carbon and comfort before you commit.
Deliver
We design and lead the technical work through to completion — fabric, heat, power and controls working as one system.
Prove
We measure results and share what we learn, so the next project — yours or someone else's — goes further, faster.
Proof, not promises.
A selection of projects where rigorous engineering turned into measurable carbon, cost and comfort gains.
A net-zero blueprint for whole communities
We underpinned every decision in National Grid's Net Zero Communities project — modelling viable options and shaping the Future Energy System Tool now used across England & Wales.
Renewable due diligence for new housing
Energy modelling and due diligence that let a major developer better use renewable energy across future schemes — for residents and significant carbon savings.
We don't just advise. We build what's missing.
Decarbonising buildings needs better products, not just better reports. We turn live R&D into the methods, systems and tools the transition is missing — and prove them on real homes, at real scale.
Our ambition goes further than commercial work.
Alongside Planet A's engineering sits Planet A Solutions CIC — our social enterprise dedicated to ensuring the transition to net zero creates skills, knowledge and opportunities for people and communities.
Explore our social impact →They are experts in breaking down complex energy problems from a first-principles perspective and providing cogent solutions that are financially and environmentally sustainable.
The things people ask us first.
Homeowners, landlords, developers, housing associations, councils, universities and community energy groups — anyone serious about cutting carbon in the built environment. We scale from a single retrofit to a net-zero community strategy.
We're engineers and innovators first, with doctorate-level depth in whole-system energy and Passivhaus design. We don't stop at advice — our R&D partnership with Verto Homes means our methods are prototyped and proven on real homes, and engineered into zero home energy bills developments with Octopus Energy. You get solutions tested in the real world, not just spreadsheets.
We're proudly based in Truro, but our work — from National Grid projects to national energy tools — reaches across England & Wales and beyond.
Yes. We deliver tailored CPD courses, workshops and keynotes on renewable energy, the built environment, sustainability and leadership — including accredited programmes with the University of Exeter.
Let's build for Planet A.
Tell us about your building, scheme or idea. We'll tell you — honestly — what's possible, what it costs, and how much carbon it saves.
Thanks — enquiry received.
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