Energy improvements mortgage

Key Features

  • We provide a straightforward, individual mortgage service

  • Can be used to fund measures such as insulation, double or triple glazing, efficient heating systems, photovoltaics, wind turbines, ground source heat pumps and biomass heating

  • Our current Standard Variable Rate is 4.65%
    Representative example:
    A mortgage of £95,300 payable over 25 years on our Standard Variable Rate, currently 4.65%, would require 300 monthly payments of £537.85.
    The total amount payable would be £161,895 made up of the loan amount plus interest (£66,055) 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 4.80% 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

  • 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)

  • 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).

Our approach to lending during your  project
  • We’ll lend up to 90% of the purchase price or current value of the property (whichever is the lower) on a repayment mortgage
  • If your project requires planning permission or listed building consent, this will need to be in place before we lend any mortgage funds
  • Our Standard Variable Rate applies until you provide evidence the energy improvement works are completed to your property.
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. Where a mortgage is not regulated by the FCA (as shown on the 'Key features' tab), you will be provided with full information about the mortgage products available from the Society so that you can make an informed decision as to which is suitable for your requirements.

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 reject. We will consider most property types where you are improving the energy efficiency of the property.

Our mortgages are available across England, Scotland, Wales and Northern Ireland.


Further reading

best buy_ECM

Ecology Building Society was rated as an ethical Best Buy for our mortgages and savings accounts by Ethical Consumer magazine in its product guide rankings (July/August 2016 issue).



C-Change discounts explained

As a building society with a unique mission to build a greener society, we only 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, and therefore have lower C02 emissions, and help them save money on their mortgages with our C-Change discounts. 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, C-Change retrofit or C-Change energy improvements discount that applies is based on the Energy Standard rating achieved on the self-build, renovation, conversion or energy improvements when the work is completed. The discount is applied from the date we receive evidence that the work has been completed and the required Energy Standard rating has been achieved.

When your project is complete

For us to apply the applicable C-Change energy improvements discount, once your work is complete you need to provide an Energy Performance Certificate and an Architect’s or Building Control sign off of works if applicable.

The discount is only applied to our Standard Variable Rate when we receive evidence that the work has been completed and the Energy Standard rating required has been achieved.

How we work out your Variable Mortgage Rate:
Our Standard Variable Rate minus C-Change discount = Variable Mortgage Rate
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 discount SVR (Standard Variable Rate)Discount % applied to funds used for energy improvements Variable 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
4.65%1.00% applied on funds borrowed for qualifying energy improvement works (see C-Change energy improvement checklist)3.65% The overall cost for comparison is 4.80% APRC
(Our 4.65% Standard Variable Mortgage Rate will apply to the rest of the mortgage)
Our fees

Residential mortgage valuation fees

Value of property not exceedingFee
Up to each £50,000 thereafter add£30

Please note these fees apply to residential and buy-to-let applications.

In all other instances, the fee required will be determined on a case-by-case basis.

A more detailed inspection, such as a Homebuyers Report can often be provided by the same valuer at a fee to be negotiated. Please advise on this point when submitting your application. Depending on the nature of the property, the fee required may on occasion differ from this scale. Valuation fees include VAT.

Application Fee

A non-refundable mortgage application fee of £300 is payable in addition to a mortgage valuation fee.

Early repayment charge

An early repayment charge may be payable if you repay all or part of your mortgage within the first two years.

Our services, fees, tariffs and charges

The Society reserves the right to amend existing services and charges, or to introduce new ones.

Any change to charges will only reflect the increased operational costs of providing the service. You will always be notified before any changes are implemented.

For further details and tariff information please see Our rates and charges leaflet.

How to apply

If you're interested in joining Ecology as a borrower, we'd love to hear from you.

Because we take an individual approach to every mortgage, we like to discuss your application with you over the phone to make sure it fits our criteria and to answer any questions you have.

You can contact us on 01535 650 770, or you can email us via our enquiry form. We receive a lot of enquiries through our website, so there may be a delay before we can respond to you. If your enquiry is urgent, please contact us by phone.

When you get in touch with us, it's helpful if you can provide us with some basic information about your project:

  • what you want to do (especially the environmental aspects of your project)
  • how much you'll need to borrow
  • how you intend to finance it.

For residential mortgage enquiries, please contact one of our mortgage advisors to discuss your project and your mortgage requirements.  You can find out more about the process by downloading The application process: a step-by-step guide