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How it works

Our approach revolves around looking at your entire home to figure out the best way to make it more energy-efficient. This whole-house approach helps us get a clearer picture of what your home needs for a retrofit.

Once you submit the plans you created in our free Plan Builder tool, your journey towards a more energy-efficient home kicks off. Our committed Retrofit Coordinator team will be there to guide you every step of the way.

Below we give you an overview of the entire process, including associated costs and the various stages of the project with us, and your chosen contractors.

Home assessment

The first step in your retrofit journey is to have one an on-site assessment of your home. During this visit, our Retrofit Coordinator will inspect your entire property to gather all the necessary information, and be able to compile a detailed Action Plan.

Whole House Plan

We’ll use the information gathered from the assessment to create a customised Whole House Plan for your home. This plan will outline various ways to improve your home’s energy efficiency. We’ll recommend the most cost-effective and impactful measures for you to prioritise, along with the optimal order to address them.

“The Whole House Plan provided a holistic view of where we could make energy saving improvements. The written report is well structured, giving a good summary and then going into detail for the different options – including information about carbon footprint. Excellent value for money, and I have already recommended Cosy Homes Oxfordshire to several other people!”

Dr Heather Comina, Cosy Homes Oxfordshire client

What costs are involved?

Each home is unique, so the cost of a whole house retrofit can vary greatly based on the type of home and the measures needed. Adopting the tailored approach of Cosy Homes Oxfordshire, there are costs involved in certain stages of the project, which are outlined below:

Free online Plan Builder tool

Using our Plan Builder tool to explore the possibility of home retrofit for your home will give you an idea of the installation costs, as well as the potential cost and carbon savings.

Home Assessment and Whole House Plan

A home assessment and Whole House Plan, inclusive VAT, costs:

  • 1-2 bed home -£375
  • 3-4 bed home – £600
  • 5+ bed home – price on request*

The cost covers the time it takes to assess your home and for our Retrofit Coordinator to create your bespoke Plan. It’s all about ensuring you get the best advice tailored just for you.

*Homes with over 5 bedrooms tend to be more complex, with multiple buildings. We just need a bit more info about your home.


Client Service Agreement

After you’ve reviewed your Whole House Plan with your Retrofit Coordinator and decided which measures to progress with, you will be sent a Client Services Agreement (CSA).

The CSA outlines any extra costs before starting your retrofit project, like a Building Performance Requirement (BPR) and additional technical reports. Costs vary (typically £500-£1500 +VAT), and our team is happy to explain the details.

This stage is key for our whole-house retrofit. Guiding you through the retrofit, we can help ensure contractors fully understand the building to prevent issues like thermal bridging, ventilation, or dampness.

Delivery of retrofit work

Once you are ready to go ahead with your home retrofit, there will be a 5% project charge for our service, which includes:

  • Facilitating any contract documents between yourself and contractor/s.
  • Coordinating the retrofit measures to ensure they are appropriately sequenced.
  • Inspect the work done to ensure the contractor delivers what they have promised.
  • Will be on hand to help resolve any issues or conflicts that may arise.
  • Sign off the work, and give you the all-clear to pay the contractor.

Our Retrofit Coordinator team does not do the day-to-day project management of the project, but they do guide you through every stage of the process, from start to finish.

For complex projects requiring the coordination of multiple contractors without a prime contractor appointed, it’s wise to consider bringing in a full-time project manager.

Our process in full

It’s then up to you to choose which measures you go ahead with, with the support and advice of your Retrofit Coordinator. We help coordinate the delivery of the work, find trusted contractors, and check the quality of delivery once complete.

Get started now

Start your energy efficiency journey with our free Plan Builder tool to build a draft home retrofit plan based on existing data about your home, and which suits your budget and priorities.

“We wanted to improve the thermal efficiency of our home to reduce our carbon footprint. That is when we found the dedicated CHO service that provides great expertise, made recommendations to us in a Whole House Plan, and was able to help us organise contractors. It was brilliant.”

Andy Pedley, Cosy Homes Oxfordshire Client

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