Independent home energy experts

Make the right energy efficiency decisions for your home - so it's warm in winter, cool in summer, and cheap to run.

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Loved by 1,000+ homeowners

One plan for old and new, done right first time.

Our experts survey your home, look at your extension plans and design the right energy upgrades for the whole house. You get the specifications and drawings your builders need.

Get unbiased advice based on your goals and budget

We're not installers. We recommend upgrades based on what's right for you and your home, not whichever products we sell.

Avoid expensive mistakes with whole-house thinking

We understand how insulation, ventilation and heating systems interact. Our whole-house methodology pieces it all together, so you don't end up with new problems like damp or an oversized heat pump.

Save time and money with smart sequencing

We split your plan into phases that minimise cost and disruption against your wider renovation timeline - so you know exactly when everything needs to happen.

Find out how we can help

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How it works

Book a home survey

We send a qualified retrofit assessor to survey your entire home for roughly two hours. They'll look at everything - walls, roof, floors, windows, heating system, and ventilation - collecting data to inform our recommendations and plan.

Review your options

An expert coordinator will walk you through our survey findings and which upgrades we recommend, with estimated costs and savings. You decide which ones you’d like us to include in our design.

Get your BuildPack

We deliver a full plan and design for your chosen upgrades. The plan is split into phases, with detailed instructions on what exactly should be installed, how, where and when.

Take it to installers

We can give you quotes from recommended, vetted contractors in our supply chain. Or you can take the pack to your own builders, architects or installers.