Great British Insulation Scheme Norfolk Suffolk 2026

Author: Co-Dunkall Ltd || Date: 17th August 2026

Last reviewed: 17 August 2026. Figures and rules can change – always confirm on the official links.

Great British Insulation Scheme funding officially ended on 31 March 2026 after the £1 billion government programme helped homeowners across Norfolk, Suffolk and the rest of Great Britain upgrade their insulation.

At Co-Dunkall, we understand that many customers in Norfolk and Suffolk are asking about grant funding for insulation and underfloor heating projects. This guide sets out the facts: what the scheme delivered, who was eligible, and what it means for homeowners now.

Key Facts: Great British Insulation Scheme

Status: Scheme closed 31 March 2026
Total budget: £1 billion
Households upgraded: 100,900 across Great Britain
Measures installed: 139,100 (cavity wall insulation 37%, loft insulation 28%, heating controls 25%)
Average cost: £25.44 per £ annual bill savings
Current funding: None – scheme has concluded

What Was the Great British Insulation Scheme?

The Great British Insulation Scheme was a government-funded energy efficiency programme designed to help households reduce energy bills and improve thermal performance. Managed by Ofgem, the scheme ran until 31 March 2026, with all installations required to be completed by that date.

In January 2026, the government confirmed that GBIS would end as planned and would not be extended, despite the related ECO4 scheme receiving a nine-month extension to 31 December 2026.

Who Was Eligible?

When the scheme was operational, two groups of households qualified for support:

Low-income and vulnerable households – 53% of all measures went to this eligibility group
Properties with EPC rating D–G in Council Tax bands A–D (England) or A–E (Scotland and Wales)

Around 11,600 measures were delivered under the Local Authority Flexible Eligibility mechanism, which allowed councils to identify additional vulnerable households. The scheme closed to new applicants in October 2025, and the GOV.UK referral service closed before January 2026.

What Did the Scheme Deliver?

Across Great Britain, GBIS upgraded 100,900 households with 139,100 measures in total. The most common installations were:

Cavity wall insulation: 51,400 installations (37%)
Loft insulation: 39,500 measures (28%)
Heating controls: 34,900 measures (25%)

Total delivery costs to the end of December 2025 reached £366.0 million, with administrative costs of £22.1 million. Mid-scheme changes introduced in Spring 2025 allowed certain households to receive two primary measures; around 1,800 households received two measures between January and November 2025.

Regional Performance: Norfolk & Suffolk

England averaged around 364 upgrades per 100,000 households to March 2026, while the North East region achieved the highest rate at 919 households upgraded per 100,000. Local authority-level data for Norfolk and Suffolk is available in Table 5 of the official statistical tables.

How Co-Dunkall Supports Insulation Projects

While the Great British Insulation Scheme has now closed, we continue to help homeowners and commercial clients across Norfolk, Suffolk, Cambridgeshire, Essex and Hertfordshire achieve excellent thermal performance through professional insulation and underfloor heating installation.

Our services include:

Floor preparation and insulation for domestic and commercial projects
TLA free-flowing insulation – thermal lightweight aggregate for superior insulation values
Underfloor heating systems designed for energy efficiency and comfort
High-quality insulation supplies via Eastern Insulation Supplies

As East Anglia’s largest floor screeding company, established in 2008, we’ve built our reputation on delivering durable, high-performance installations with seamless finishes and excellent thermal efficiency.

Frequently Asked Questions

Is the Great British Insulation Scheme still open?

No. The scheme officially ended on 31 March 2026. All installations had to be completed by that date, and no new applications are being accepted.

Can I still get insulation funding in 2026?

The Great British Insulation Scheme has closed. The related ECO4 scheme was extended by nine months to 31 December 2026, but this is a different programme with different eligibility criteria.

What happened to households that applied before the scheme closed?

The scheme closed to new applicants in October 2025. Any installations arranged before 31 March 2026 needed to be completed by that deadline.

Were there any quality issues with GBIS installations?

In October 2025, the National Audit Office reported quality failures with wall insulation under the scheme. The UK Government offered affected homes free audits to address these concerns.

How much did insulation cost under the scheme?

Total delivery costs reached £366.0 million to the end of December 2025, with an average cost of £25.44 per £ annual bill savings.

Get Expert Advice on Insulation & Underfloor Heating

Whether you’re planning a new build, renovation or commercial project, our team at Co-Dunkall can advise on the best insulation and underfloor heating solutions for your property. We work with high-quality materials, deliver on time, and provide the technical expertise you need for long-lasting, energy-efficient results.

Call us on 01953 488224 or email info@co-dunkall.co.uk to discuss your project and request a no-obligation quote.

Professional floor insulation, underfloor heating and liquid screed installation across Norfolk, Suffolk, Cambridgeshire, Essex and Hertfordshire.

Read what our customers had to say

    
 
 
         
   S Pearson 
 
 
 
 Trustindex verifies that the original source of the review is Google. Great service, professional and reliable each time we use them.
  
 
        
   A Thompson 
 
 
 
 Trustindex verifies that the original source of the review is Google. The team did a professional and courteous job for over 100m2 with insulation. Helpful advice, efficient measures, laying out was done with attention to detail. Pouring was prompt and careful. The skip liner was much appreciated. The levels were perfect for our doors. Helpful advice and ensured we’re satisfied with the results. Thank you and well done. 👍🏻
  
 
        
   M Boby 
 
 
 
 Trustindex verifies that the original source of the review is Google. Co-Dunkall ltd recently laid a floor screed for a new gymnasium floor.Very pleased with the service they provided throughout the process.Hard working team that kept me informed of deliveries to site and left the site spotless .Client super impressed with the floor finish .
  
 
        
   O V 
 
 
 
 Trustindex verifies that the original source of the review is Google. I did screed with them twice, we had our house done in 2 phases and in the 1st phase they supplied us with specific stats, on the 2nd phase they supplied us with different stats model and a control box which allows to connect to them remotely but, then I had an issue with the phase 1 stats won't connect to the system as they don't support that functionality. I rang their customer support and explained the issue, they offered to swap the phase 1 stats with new ones so, all stats will be from the same model and all will connect to the control box.
One more word about their expertise, the 2 phases were done a part so the 1st phase screed was higher than the existing old bit, when they came to do the old bit on the 2nd phase, I asked if they can do the screed so that both bits will be same height, they did it perfectly, both phases met up level and the wood floor on top is at the same height, I must say I was sceptic but, these guys are awesome, they are experts in what they do. that made me so happy!
That is a company who cares about their business and about their customers.
I will definitely recommend and will definitely do business with them again.
Thanks you Co-Dunkell
  
 
        
   P W 
 
 
 
 Trustindex verifies that the original source of the review is Google. We had our screed pumped in and laid by the team at Co-Dunkall today at our self-build, the three man team onsite and those in the office were all professional and friendly at all stages from quotation, survey and the final delivery and instation. Everyone has done what they said they would do and within the timescale given. If you need pumped floor screed I can recomend this company 100%
  
 
        
   H Campbell 
 
 
 
 Trustindex verifies that the original source of the review is Google. Very good service. Nicky and Adrian super helpful to see the job through! 5 star. Screed is silky smooth
  
 
        
   M Brooks 
 
 
 
 Trustindex verifies that the original source of the review is Google. Complete bungalow floor screeded by these guys.
Bob who surveyed the project and supervised the screed being laid is a credit to the company. No more than 1mm difference in levels throughout !
  
 
        
   S smith 
 
 
 
 Trustindex verifies that the original source of the review is Google. We had Co-dunkall provide a cemfloor screed for an outbuilding which needed the floor raising. Thoroughly professional service 3 survey calls and inspections prior to the job. Nikki and the office team all highly knowledgable on so many aspects and on the day they even provided a 6 wheel mini mix to accommodate the property complexities. Good follow up and so pleased for a  very clean and tidy washout considering how messy the job can be. You would not know they had been on site. End result is exactly what we needed
  
 
        
   L Bailey 
 
 
 
 Trustindex verifies that the original source of the review is Google. Excellent job and Excellent service.
Had 100% confidence in them.
Can't fault them.
They are very professional and they have a lovely approach to customer service.

We have used Co Dunkall on any occasions and will do so in the future.

Would highly recommend.

Thank you very much from the Bailey's.
  
 
  
 
  
 
   Google rating score: 4.8 of 5, based on 53 reviews

For a quote or any general questions and enquiries please get in touch with our team