Retrofit Services
Professional retrofit services for a warmer, healthier home. We assess, plan, and coordinate your energy upgrade—treating your property as a complete system, not a shopping list of products.
- Whole-house performance planning
- Risk-aware sequencing
- Impartial, independent guidance
Fabric First
Insulation & Efficiency
Airtightness
Draft Proofing
Heating
Heat Pumps
Renewables
Solar PV & Battery
Ventilation
Moisture Control
What are retrofit services?
Retrofit services cover the engineering, design, and management required to upgrade an existing home for energy efficiency.
Unlike a simple boiler swap, professional retrofit looks at how changing one element (like adding insulation) affects others (like ventilation). Our goal is to improve comfort and lower bills without introducing damp or mould risks.
"The best outcomes come from treating your home like a system—fabric + ventilation + heating—not a shopping list."
Retrofit Assessment & Planning
Before you buy a heat pump or wrap your walls, you need a baseline. Our assessment models your home's physics to tell you exactly what measures are suitable.
Prevents:
- Installing heat pumps in draughty homes
- Mould caused by insulation without ventilation
- Wasted budget on incompatible measures
Retrofit Coordination
For complex multi-measure projects, we act as your technical guardian. We ensure the work delivered on site matches the intent of the design.
Includes:
- Sequencing (e.g., windows before insulation)
- Quality checkpoints at key stages
- Evidence gathering for warranties
The Retrofit Journey
Assess
We survey your home, model its energy use, and identify constraints.
Plan
We produce a sequencing roadmap and detailed measure specifications.
Deliver
We oversee the installation to ensure quality and gather evidence.
Phased retrofit is common — sequencing is key.
Who we support
Homeowners
- • Planning a renovation
- • Wanting to reduce bills
- • Confused by conflicting advice
Landlords
- • Meeting EPC C targets
- • Solving damp/mould complaints
- • Protecting asset value
Housing Providers
- • Stock condition modelling
- • PAS 2035 compliance
- • SHDF programme support
Why the approach matters
Installing a heat pump without improving insulation first results in high running costs. Adding airtight windows without ventilation leads to black mould.
A fabric-first approach reduces heat demand, allowing for a smaller, cheaper heat pump. Controlled ventilation ensures air quality remains healthy permanently.
What you'll receive
The Plan
- Baseline Energy Model
- Improvement Options
- Sequencing Roadmap
Risk Management
- Ventilation Strategy
- Moisture Risk Assess
- Constraint Flags
Specification
- Material Recommendations
- U-Value Targets
- Performance Specs
Documentation
- Scope for Builders
- Evidence Pack
- Handover Log
Common Questions
Do you carry out the installation?
How much does a Retrofit Plan cost?
Do I need a Retrofit Assessment before I get quotes?
Can I do retrofit in phases?
Ready to plan your retrofit?
Already have a plan? Coordination can help delivery.
Areas we cover
Providing retrofit services across London, Surrey, Sussex, and Kent. Including Guildford, Brighton, Tunbridge Wells, and Greater London boroughs.