Energy improvements mortgage


Key Features

  • An energy improvements mortgage can be used to fund measures such as insulation, double or triple glazing, efficient heating systems, solar panels, photovoltaics, wind turbines, ground source heat pumps and biomass heating
  • Our current Standard Variable Rate is 4.15%
    Representative example:
    A mortgage of £95,300 payable over 25 years on our Standard Variable Rate, currently 4.15%, would require 300 monthly payments of £510.96.
    The total amount payable would be £153,849.61 made up of the loan amount plus interest (£58,009.61) and a mortgage application fee of £300 and a valuation fee of £240 (assuming a purchase price of £200,000).
    The overall cost for comparison is 4.30% APRC representative
  • We’ll consider lending up to four times joint or sole income subject to loan- to-value and an affordability assessment
  • Energy efficient homes are rewarded with discounts off our Standard Variable Rate - see details below of how our C-Change energy improvements discounts work
  • The minimum loan amount that can qualify for this discount is £1,000
  • Mortgages are available on a repayment, interest-only or part (repayment) and part (interest-only) basis, subject to eligibility
  • Interest-only and part interest-only mortgages are subject to an acceptable repayment vehicle
  • You can borrow up to 90% of the property’s value on a repayment basis, or up to 75% interest-only or part (repayment) and part (interest-only), subject to eligibility
  • An early repayment charge may be payable if you repay all or part of your mortgage within the first two years
  • A non-refundable mortgage application fee of £300 is payable in addition to a mortgage valuation fee
  • A maximum mortgage term of 30 years is available, subject to eligibility.
  • Borrowers must be aged 18 or over.  This mortgage is only available to UK residents

If your project requires planning permission or listed building consent, this will need to be in place before we lend any mortgage funds. 

What we lend on

We don't have a 'tick box' approach to assessing projects - in many instances, we'll welcome projects that standard lenders may not accept. We will consider most property types where you are improving the energy efficiency of the property.

Our mortgages are available in the UK (England, Scotland, Wales and Northern Ireland).

Our approach to lending during your  project
  • We are experts in providing mortgages for energy improvements
  • Our Standard Variable Rate applies during your works and our discounts are applied from the date you provide evidence that the energy improvement works have completed.
Our standard of service

The Financial Conduct Authority (FCA) has laid down detailed rules about the service we must offer on regulated residential mortgages. Under these rules, we will provide you with advice and recommendation on which of the Society's products is most suitable for you, based on your needs, preferences and affordability.

Further information

Ecology Building Society was rated as an ethical Best Buy for our mortgages, ISAs and savings accounts by Ethical Consumer magazine in its product guide rankings (May/June 2018 issue).

C-Change discounts explained

As a building society with a unique mission to build a greener society, we lend on projects and properties that support our aims through their reduced impact on our environment. Making your home energy efficient is a major way you can support tackling climate change – while saving on your energy bills.

We reward borrowers whose properties are energy efficient (therefore have lower carbon emissions) with our C-Change discounts off our Variable Rate which helps them save money on their mortgage. We call our discounts ‘C-Change discounts’ simply because we’re aiming to make a ‘sea-change’ of difference to our climate with each property or project we fund.

The level of our C-Change sustainable homes or C-Change retrofit discount that applies is based on the Energy Standard rating achieved on the self-build, renovation or conversion when the work is completed. Our C-Change energy improvements discount is based on the qualifying energy measures being installed. The discount is applied from the date we receive evidence that the work has been completed and if applicable the Energy Standard rating required has been achieved.

For funds borrowed to install energy efficiency measures or renewable energy systems: C-Change energy improvements discount

The C-Change energy improvement scheme offers a discount of 1% on funds borrowed for qualifying energy measure installations (listed in the table below) and is applied once work is completed and evidenced by invoices. Please note the discount is applied to funds borrowed for energy improvement measures only and our Standard Variable Mortgage Rate will apply to the rest of the mortgage.

For example, if you borrow £150,000 and £50,000 is used for energy improvements, once all work is completed and evidenced, we would apply a 1% discount from our Standard Variable Rate to the £50,000 used for energy improvements and our Standard Variable Rate would apply to the rest of the mortgage.

Energy improvement measures which can benefit from the discountSVR (Standard Variable Rate)Discount % applied to funds used for energy improvementsVariable Mortgage Rate
Floor, wall and roof insulation
Double or triple glazing
Wet underfloor heating systems
High efficiency condensing boilers
Solar water heating
Wind turbines
Ground source heat pumps
Biomass heating
Heat recovery systems
Low water-use appliances
Rain water harvesting
4.15%1.00% applied on funds borrowed for qualifying energy improvement works (see C-Change energy improvement checklist)3.15% The overall cost for comparison is 4.30% APRC
(Our 4.15% Standard Variable Mortgage Rate will apply to the rest of the mortgage)