How does Energiesprong work?

One home with Energiesprong retrofit, one without (Maldon, Essex)

What is an Energiesprong retrofit?

Energiesprong is a whole house approach to retrofit. Homes are fully insulated using offsite manufactured wall and roof panels in conjunction pre-assembled ‘energy pods’ providing low-carbon, high efficiency heating, hot water and renewable energy production delivered. The end result is homes that are brought up to a minimum net-zero energy standard, creating warmer, more desirable places to live.

“Because these are old buildings… they were hard to keep warm. Now it is easier. My son is autistic and he’s happy as well because he loves the warm." Huseyin, Nottingham City Homes resident

What homes does it work on?

The Energiesprong approach can be used on a range of housing archetypes. Currently, Energiesprong works with the social housing sector to create initial volume to get the first solutions developed in the UK. A housing company finances an Energiesprong retrofit (or new build) by combining savings on energy cost from tenants and on repairs and maintenance. 

At least 11 million UK homes are currently suitable for Energiesprong retrofits (source: Green Alliance, 2019). Converting this market potential – and further cost reductions – is a primary goal of Energiesprong UK

How much does it cost?

The objective is that tenants have the same monthly expenses. The housing association can now add this new income stream to pay for the retrofit. Tenants pay the housing association an energy service plan (similar to a phone bundle)
with an allowance for a guaranteed indoor temperature, plus an allowance for hot water per day and a power bundle for light and appliances.


Because the Energiesprong standard guarantees the energy performance of the house and is a real life performance instead of a theoretical measure, the housing association can calculate how much the alternative would cost when the tenant
would have to purchase this comfort level through the energy supplier. The housing association can now set the energy plan according to that rate (or under it if it chooses to).

Because the housing companies’ new combined budget needs to cover the total cost of ownership over 30 or 40 years, it drives solution providers not only to lower costs upfront and improve quality, but also to focus on lifetime costs.