The operating system
for building decarbonisation
The standard in compliance software and decarbonisation services for PAS retrofit, from survey to TrustMark lodgement.
The UK needs to retrofit 1.5 million homes per annum by 2050.
Retrofitting the UK’s ageing housing stock is one of the nation’s biggest challenges on the path to net zero. With around 29 million homes and the majority still needing significant energy efficiency upgrades, delivery teams need compliant workflows—not more admin.
Delivery organisations do not always have a time and cost-efficient, data-driven approach to compliant retrofit.
Complex compliance
PAS 2030 and PAS 2035 programmes layer obligations across survey, design, install and lodgement—creating rework when evidence is fragmented across tools.
Lack of joined-up data
Teams rely on spreadsheets, email and disconnected apps. Generic workflows drive up cost and weaken audit-ready evidence at submission.
Scheme pressure
WH:SHF, WH:LG, ECO and social housing programmes demand faster delivery with tighter governance—without compromising TrustMark-ready quality.
Scaling delivery
Assessors, coordinators and installers need one system as programmes grow—from single schemes to portfolio-wide retrofit at pace.
Retrofit OS is the industry-standard platform for PAS 2030 and PAS 2035 compliance.
We simplify complex compliance, save you time, and enable your business to scale through smart workflows and technology built for assessors, coordinators, installers and social landlords.
Platform impact
Trusted at scale across UK retrofit programmes
Homes processed through Retrofit OS
Improvements processed
Tonnes of carbon saved
How Retrofit OS works
How we revolutionise compliant retrofit delivery
Survey
On-site capture
Compliance
PAS-aligned workflows
Lodgement
Submission-ready packs
Retrofit OS provides end-to-end workflows across WH:SHF, WH:LG, PAS 2030 and PAS 2035, so appointments, evidence, compliance checks and submission stay joined up from first visit to handover.
Appointments & scheduling
On-site surveys & assessments
Digital forms & certificates
Compliance documentation
Install booking & evidence
TrustMark lodgement support
Submission-ready packs
Programme reporting & exports
UK-hosted secure data
News & Blog
Insights from Retrofit OS
Working with
Strategic partners
Roadmap to
compliant delivery.
See how Retrofit OS maps to your schemes from first appointment through install evidence to TrustMark-ready submission.
Arrange a Demo