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RetrofitWorks introduces Cosy Homes London, the definitive end-to-end service designed to simplify green home improvements for homeowners across Greater London. If you’re looking to reduce your energy bills, cut carbon emissions or achieve year-round thermal comfort, our expert-led, coordinated service is built for you. We manage the entire home energy efficiency journey, from your initial assessment to final sign-off, ensuring a safe, high-quality and future-proofed home.

Addressing the London retrofit pain points: combatting cowboy installers and lack of trust

We recognise the major frustration for homeowners in Greater London: a market plagued by ‘cowboy’ installers, poor-quality work and a complete lack of faith in the supply chain. Homeowners are right to be wary, with widespread reports of:

• Low consumer confidence: Homeowners find it overwhelming and difficult to find suitably qualified, honest contractors for specialised green works like heat pump installation or solid wall insulation.
• Failed installations: Government schemes have been compromised by weak oversight, resulting in faulty and damaging work that leaves homes with dampness, mould and even reduced EPC ratings.
• Fragmented advice: Too many short-term, complicated schemes and a lack of impartial advice have made it impossible for Londoners to know who to trust or where to start.

Cosy Homes London is explicitly designed to solve this crisis of confidence.

Why choose us for your home retrofit?
The trustworthy solution

Our coordinated approach is built on accountability, quality assurance and proven expertise, offering a reliable alternative to the fragmented market:

• Vetted and trusted network: We eliminate the risk of hiring ‘cowboy’ builders by working only with a carefully vetted network of registered installers. Our contractors share our commitment to craftsmanship and reliability.
• The Retrofit Coordinator advantage: Every project is overseen by your dedicated Retrofit Coordinator, an independent, qualified expert who acts solely in your interest. They design the plan, draw up the correct technical specification and oversee the quality of the work on site right through to compliance and sign-off.
• A decade of expertise: Built by RetrofitWorks, a not-for-profit cooperative, we have a proven track record, having delivered the GLA’s home energy schemes and managed the successful Cosy Homes Oxfordshire programme for over six years.
• Quality and comfort guaranteed: Your ultimate goal is a home that’s warmer, healthier and cheaper to run. Our rigorous Whole House Retrofit Plan prevents the unintended consequences (like mould and damp) that often result from uncoordinated, low-quality installations.
  

Why choose us to make your home warmer and cosier? 

Our service is tailored to meet the core concerns of London homeowners funding their own upgrades, delivering significant experiential benefits:

• Slash energy bills and carbon emissions: Achieve a truly energy-efficient home and reduce your environmental impact.
• Improve comfort and health: Eliminate draughts, reduce damp and mould, and enjoy a home that is warmer in winter and cooler in summer.
• Futureproof investment: Protect your home against rising energy costs and significantly increase its value and Energy Performance Certificate (EPC) rating.
• Expert oversight: Benefit from the quality assurance of a not-for-profit cooperative with over a decade of experience, including running successful schemes across London and the UK.
  

Your 3-step whole-house retrofit journey 

We replace piecemeal fixes with a strategic, coordinated whole-house approach, guided by a dedicated Retrofit Coordinator.

     1. Retrofit assessment and Whole House Plan

Start with a comprehensive home analysis. We model your current energy use to create a bespoke Whole House Retrofit Plan. your roadmap for phased green improvements.

Pricing: £600 (incl. VAT) for a 3–4-bedroom home; £450 (incl. VAT) for a 1–2-bedroom home. Contact us for larger homes.

Final deliverable: A one-to-one video consultation with your Retrofit Coordinator to review your report and agree on the next steps.

     2. Technical specification

Your assigned Retrofit Coordinator prepares a detailed technical brief. This critical step ensures all improvements work together seamlessly, following the fabric-first principles, guarantees accurate quotes and a coordinated retrofit project.

A quote for this stage will be provided after your plan is confirmed.

     3. Quotes, installation and oversight

We source quotes from our vetted network of installers and oversee the installation process. Your Retrofit Coordinator ensures quality, compliance and ultimate sign-off.

Tailored quotes for works provided based on your selected improvements.

The home improvements we deliver

Our network of high-quality, trusted London retrofit contractors specialises in measures that deliver maximum savings and comfort:

• Insulation: Solid and cavity wall insulation, roof insulation and underfloor insulation to keep the heat in.
• Glazing and airtightness: Installation of high-performance glazing and essential draught-proofing.
• Low-carbon heating: Seamless air-source heat pump installation and optimised heating controls.
• Renewables: Installation of solar PV and battery systems for energy self-sufficiency.
• Ventilation: Crucial ventilation improvements for a healthier home environment.
  

Powered By RetrofitWorks

Since 2013, RetrofitWorks has been uniting installers, professionals and community groups to drive the improvement of the UK’s housing stock. Our track record includes delivering the GLA’s home energy schemes and running the successful ‘able-to-pay’ Cosy Homes Oxfordshire programme for over six years. We bring more than a decade of expertise to make energy efficiency achievable for every household in London.