Engage one discipline or the whole journey. Either way you get the same rigour — risk-informed data, buildable design and evidence that stands up to audit.
End-to-end PAS 2035 coordination that carries a project from risk assessment and improvement planning through installation to lodgement, with responsibilities and evidence defined at every stage.
Risk pathway and intended outcomes
Medium-term improvement planning
Design and measure review
Evidence requirements
Installation-stage oversight
Non-conformance management
Post-installation evaluation
TrustMark lodgement support
Whole-dwelling assessment and energy performance reporting that establish accurate property, ventilation and occupancy data to inform compliant design decisions.
Whole-dwelling condition and risk survey
Occupancy and ventilation assessment
Energy performance report and modelling
Improvement options and intended outcomes
Fabric-first retrofit design and technical detailing, developed around how measures are actually installed so they perform as intended and avoid rework on site.
Fabric-first measure specification
Junction, interface and ventilation detailing
Buildable, installer-ready drawings
Design review and measure coordination
Heat pump and solar PV system design, sized to the upgraded fabric and integrated with the wider retrofit strategy so low-carbon heat performs efficiently from day one.
Air-source heat pump sizing and design
Solar PV and storage integration
Whole-system performance modelling
Controls and commissioning requirements
Compliance reviews, evidence schedules and site inspections that support installers through delivery and keep projects aligned with the standard.
Pre-start compliance reviews
Evidence schedules
Technical query support
Design-change control
Site inspections and sample audits
Corrective-action tracking
Ongoing monthly compliance support
Stock-data review, archetyping and phased delivery planning that turn a portfolio of properties into a sequenced, fundable and deliverable programme.
Stock-data review
Property and measure archetyping
Programme phasing
Delivery planning
Resource requirements
Procurement and responsibility mapping
Reporting and data structure
Straight answers to the questions housing providers, contractors and delivery partners ask us most.
What is retrofit?
Retrofit means upgrading an existing building to make it warmer, healthier and more energy efficient. In practice that's a fabric-first approach — insulation, airtightness and ventilation — combined with low-carbon heat such as an air-source heat pump.
A coordinated, PAS 2035 process makes sure these measures work together safely, rather than being installed in isolation where one can undermine another.
What is PAS 2035 and do I need it?
PAS 2035 is the UK standard for whole-house domestic retrofit. It is required for most funded works and is best practice for any retrofit, ensuring measures are assessed, designed and installed as a coordinated whole.
Where do you work?
We are based in the Midlands and support retrofit projects and programmes across the UK — for single properties and large-scale programmes alike.
How quickly can you start?
Most assessments can be scoped within a week of an initial conversation. Programme work begins with a housing-stock analysis, so delivery is planned around your timelines and funding.
Start your project
Tell us where you are and we'll point you to the right starting place — no obligation.