Ecology Building Society: Savings, Mortgages & Green Finance
Ecology Building Society is different from a typical high-street lender. Its savings fund mortgages for projects such as energy-efficient homes, self-builds, major renovations, conversions, affordable housing and community-led developments, so people searching for Ecology often care about both the financial terms and what their money supports.
This guide explains the current savings choices, specialist mortgage routes, C-Change energy-efficiency discounts, new Online Service, first high-street branch in Porth and the practical checks to make before opening an account or committing to a green building project.
Meaningful editorial review: 16 September 2026. Savings rates, mortgage rates, product availability, EPC criteria and lending terms can change. Current-rate examples below are a dated snapshot, not a promise of the rate available when you apply.
Ecology Building Society: Quick Answers
What Are You Trying to Do?
Ecology has a smaller product range than a large retail bank, but the rules vary significantly between savings products and mortgage types. Start with the task that matches your situation.
Check the Regular Saver, easy-access, limited-access, notice and Cash ISA options.
Compare current savingsThe 2026 digital-service change matters especially if your account was opened before 24 March 2026.
Open digital-service guidanceCheck the current ISA rate, £20,000 annual allowance and transfer process before moving old ISA money.
Open Cash ISA guidanceMatch the mortgage to the property and project before comparing headline rates.
Explore mortgage typesSome qualifying projects can receive a mortgage-rate discount linked to verified environmental performance.
See discount rulesEcology opened its first branch in Porth, South Wales in April 2026.
See branch detailsWhat Makes Ecology Building Society Different?
Ecology began trading in 1981 after its founders identified a gap in mortgage finance for properties needing extensive environmentally minded renovation. Its purpose remains unusually specific: savings are used to support mortgage lending for homes and projects intended to deliver environmental or social benefit.
That does not mean every Ecology product will beat the wider market on price. The practical difference is that a saver can trace the Society’s funding model more directly: members place savings with Ecology and the Society uses those funds to support its specialist lending.
Official Ecology What Makes Ecology Building Society Different?
After opening this link:
- Read the sections on sustainable mortgages, ethical savings and mutual ownership.
- Check how Ecology says members’ savings are used to fund its lending.
- Follow the mortgage links if your property involves renovation, self-build or another unusual construction project.
- Return to the live savings page before opening an account because interest rates can change independently of Ecology’s environmental policy.
Ecology Building Society Savings Accounts and Current Rates
Ecology currently offers a mixture of regular savings, notice accounts, easy-access products, community-impact products and a Cash ISA. The important difference between them is not only the rate: minimum deposits and withdrawal rules vary considerably.
The rates below were checked against Ecology’s live savings pages on 16 September 2026. They are variable where stated and can change after this page is published.
Official savings Compare Ecology Savings Accounts
After opening this link:
- Find the live savings comparison table.
- Check the AER and whether the rate is variable.
- Compare the minimum and maximum balance with the amount you intend to save.
- Read the withdrawal column carefully; “easy access”, “double access”, “35-day notice” and “180-day notice” work differently.
- Open the individual product page and read the terms before applying.
- If opening online, confirm whether the account supports your ownership type, especially if you want a joint account.
Which Ecology Savings Account Fits Your Goal?
Ecology Online Service and App: Important 2026 Registration Change
Ecology introduced a new Online Service and mobile app in 2026. This creates an important distinction between members opening accounts now and customers whose accounts were opened before 24 March 2026.
Account opened online or in the app now
- Registration is completed as part of the digital application.
- Your email address becomes part of your digital login setup.
- You can use the Online Service and Ecology App where the account is eligible.
- A linked bank account is used for supported payments and withdrawals.
Account opened before 24 March 2026
- Existing members need to register for the new Online Service before using the new app.
- The registration process asks for an existing 10-digit Ecology account number.
- Ecology warns that the 9-digit customer number is not the number required for this registration step.
- Each person using a joint account digitally needs a unique email address where supported.
Official login Ecology Building Society Online Service Login
After opening this link:
- Check that the browser address belongs to Ecology before entering login details.
- Existing registered users can continue through the official login screen.
- If you have not registered for the new service, use Ecology’s official one-time registration route rather than repeatedly guessing a password.
- Never share an email verification code, password or app PIN with somebody who contacts you unexpectedly.
Official registration Register for Ecology’s New Online Service
After opening this link:
- Enter the email address Ecology has recorded for you.
- Enter an existing 10-digit Ecology account number without dashes.
- Select whether you have savings or only a mortgage account.
- Read and accept the Digital Terms and Conditions.
- Enter the verification code sent to your registered email address.
- Complete any linked-account validation requested by Ecology.
Ecology Cash ISA: Rate, Allowance and Transfers
Ecology’s Cash ISA currently pays 3.05% AER tax-free variable, with a £25 minimum balance. The published ISA allowance for the 2026/27 tax year is £20,000.
Ecology accepts transfers from previous years’ Cash ISAs. The account permits withdrawals, but Ecology’s published terms explain that withdrawn money cannot automatically be replaced outside the normal ISA subscription allowance in the way a flexible ISA would allow.
Official Cash ISA Ecology Cash ISA Details
After opening this link:
- Check the current AER rather than relying on an older comparison table.
- Read the eligibility requirements for online or app opening.
- Check the annual ISA subscription limit for the current tax year.
- If transferring an existing ISA, follow Ecology’s transfer instructions instead of withdrawing the funds yourself.
- Read the withdrawal wording carefully because this account is not presented as a flexible ISA.
Ecology Building Society Mortgages: More Than a Standard House Purchase
Ecology’s mortgage range is aimed at properties or housing models that meet particular environmental or social criteria. This is where the Society differs most clearly from many mainstream lenders.
Selected Mortgage Snapshot — Checked 16 September 2026
Official mortgages Explore Ecology’s Current Mortgage Range
After opening this link:
- Choose the property journey first: self-build, renovation, conversion, eco home, shared ownership, affordable home or community living.
- Open that product rather than comparing rates across mortgages designed for different property types.
- Check maximum LTV and the minimum energy-performance requirement.
- Review whether repayment, interest-only or part-and-part borrowing is allowed for that product.
- Check the application fee, valuation cost and any early repayment charge.
- Complete Ecology’s enquiry route if the property or project fits the published criteria.
How Ecology’s C-Change Mortgage Discounts Work
C-Change is Ecology’s mechanism for linking part of a borrower’s mortgage rate to verified environmental performance. The discount is not simply awarded because a borrower intends to make a property greener; Ecology requires evidence after the project reaches the qualifying standard.
Ecology currently states that qualifying borrowers can receive up to a 1.50 percentage-point discount against the relevant standard variable rate, depending on the final energy standard or retrofit achievement.
Official C-Change Ecology C-Change Mortgage Discounts
After opening this link:
- Identify whether your project falls under Sustainable Homes or Retrofit.
- Find the energy standard you expect to achieve.
- Check the corresponding published discount.
- Read what final certification or EPC evidence Ecology requires.
- Do not budget using the discount until you understand when it starts and what happens if the final property misses the intended standard.
- Ask Ecology to explain how the discount would affect your specific mortgage before proceeding.
What “Green Finance” Means at Ecology
On this page, green finance does not mean simply putting a green label on an ordinary account. Ecology links the two sides of its mutual model: saver deposits provide funding for mortgages, while mortgage eligibility focuses on projects intended to improve environmental performance or deliver wider social value.
Ecology’s Published 2025 Impact Snapshot
Official impact map See Where Ecology Members’ Money Goes
After opening this link:
- Select a UK region from the map or region selector.
- Check how many mortgages Ecology currently reports in that area.
- Open individual project stories for examples such as renovation, Passivhaus, community-led housing or sustainable development.
- Use the project information to understand Ecology’s lending model, not as evidence that your own proposed mortgage will automatically qualify.
Before You Ask Ecology About a Mortgage
Ecology’s mortgages are specialist products, so details about the property and intended works can matter much earlier than they might with a standard high-street mortgage.
Ecology’s Porth Branch: First High-Street Location
Ecology opened its first-ever high-street branch at 44 Hannah Street in Porth, South Wales on 20 April 2026. It offers face-to-face support for savings and mortgage enquiries and includes community space.
The branch also hosts OneBanx kiosks for cash deposits and withdrawals. Ecology states that the kiosk service can be used by local residents and businesses even if they are not Ecology customers, subject to the OneBanx service requirements.
Ecology Building Society — Porth
Address:
44 Hannah Street
Porth
Rhondda Cynon Taf
CF39 9RA
Monday: 9:30am-2:30pm
Tuesday: 10am-4pm
Wednesday: 9:30am-4pm
Thursday: 9:30am-4pm
Friday: 9:30am-2:30pm
Weekends & bank holidays: Closed
Official branch Ecology Porth Branch Information
After opening this link:
- Check the current day’s opening hours before travelling.
- Review whether your task is savings help, a mortgage conversation, account support or cash-kiosk use.
- If you need a detailed mortgage discussion, consider contacting Ecology first so you know what information to bring.
- Use the location information for travel planning; Porth railway station and bus interchange are close to the branch.
Ecology Building Society Contact Details and Head Office
Member Services
Phone: 01535 650 770
Email: members@ecology.co.uk
Phone hours:
Monday: 9am-5pm
Tuesday: 10am-5pm
Wednesday-Friday: 9am-5pm
Ecology states that it is closed on bank holidays and closes from 12:30pm on Christmas Eve and New Year’s Eve.
Head Office / Postal Address
Ecology Building Society
Ellis House
7 Belton Road
Silsden
Keighley
West Yorkshire
BD20 0EE
The Silsden address is Ecology’s main office and correspondence address. The Porth location is its first high-street branch.
Official contact Contact Ecology Building Society
After opening this link:
- Choose whether the enquiry concerns residential mortgages, community or business mortgages, savings or another issue.
- Use the online form when you want Ecology to respond to a non-urgent enquiry.
- For account-specific help, have identifying information available but do not include confidential security credentials in an ordinary email.
- If the matter is a complaint, follow Ecology’s formal complaint route so the issue is recorded correctly.
Is Ecology Building Society Covered by FSCS?
Yes. Ecology currently states that eligible deposits are protected by the Financial Services Compensation Scheme up to a total of £120,000 per eligible depositor under the standard deposit-protection limit.
Official FSCS Check Deposit Protection With FSCS
After opening this link:
- Select the savings or deposit-protection route.
- Search for the financial institution when prompted.
- Check the current protection limit and eligibility rules.
- If you hold an unusually large temporary balance, read the separate temporary-high-balance rules rather than assuming the standard limit applies.
Common Ecology Building Society Mistakes to Avoid
When Ecology May Be Worth Exploring
Ecology may be relevant when
- You want savings linked to clearly described sustainable lending.
- You are planning an energy-efficient self-build.
- You are buying or restoring a property needing major renovation.
- Your property uses qualifying non-standard or modern construction.
- You are buying within a co-housing or community-led scheme.
- You need finance for a qualifying Discounted Market Sale property.
- You expect a project to achieve a recognised high energy standard.
Compare the wider market when
- Your only priority is the highest available savings rate.
- You want a conventional mortgage on a property with no relevant environmental or social criteria.
- You need a current account, credit card or full high-street banking relationship.
- You need more branch locations than Ecology currently provides.
- Your property or planned works fall outside Ecology’s lending criteria.
- A mainstream lender offers materially better overall borrowing costs for your circumstances.
Related UK Building Society Guides
Ecology is unusually specialised, so it can help to compare it with larger or more conventional mutuals before deciding where to save or borrow.
Official Ecology Building Society Resources
Use these official routes for live rates, product eligibility, applications, digital-service access and current contact information.
How This Ecology Guide Was Checked
Editorial review date: 16 September 2026. Variable savings rates and mortgage rates are intentionally dated because they can change faster than the surrounding practical guidance.
Independent Financial Information Notice
Building-society.org is an independent informational website. It is not Ecology Building Society, the Financial Conduct Authority, Prudential Regulation Authority, Financial Services Compensation Scheme or Financial Ombudsman Service.
This page does not provide personalised financial advice and cannot assess whether an Ecology savings account or mortgage is suitable for your circumstances. Mortgage eligibility, affordability, valuation, property criteria and final pricing are controlled by Ecology and its applicable terms.
Ecology Building Society FAQs
1. What is Ecology Building Society?
Ecology Building Society is a UK mutual founded in 1981. It offers savings and specialist mortgages, with a particular focus on sustainable housing, energy-efficient construction, renovation, community-led housing and other projects that meet its environmental or social lending criteria.
2. What is the Ecology Building Society phone number?
Ecology publishes 01535 650 770 for Member Services. Its normal telephone hours are Monday to Friday from 9am to 5pm, except Tuesdays when lines open at 10am. Bank holiday arrangements can differ.
3. What savings accounts does Ecology Building Society offer?
Ecology’s current range includes regular savings, easy-access savings, the Eco Double Access Saver, 35-day and 180-day notice accounts, a Cash ISA and community-impact savings products. Rates and product availability can change.
4. What is the Ecology Regular Saver rate?
Ecology’s newer 12-month Regular Saver was paying 6.00% AER/gross variable when checked on 16 September 2026. It allows saving up to £200 a month and does not permit normal withdrawals during the term; the account can be closed if the money is needed. Check the live rate before applying.
5. Does Ecology Building Society have online banking and an app?
Yes. Ecology operates an Online Service and mobile app for eligible customers. Members with accounts opened before 24 March 2026 generally need to register for the newer Online Service before using the new app. Current restrictions apply to some joint accounts.
6. What mortgages does Ecology Building Society offer?
Ecology’s range includes self-build, renovation, off-site build, conversion, Eco Home, shared ownership, Affordable Local Homes, Community Living, community and commercial lending, plus EcoReward for qualifying existing borrowers. Each product has separate property, EPC, affordability and LTV rules.
7. What is Ecology’s C-Change mortgage discount?
C-Change rewards qualifying environmental performance with a mortgage-rate discount after the required evidence is provided. Ecology currently publishes discounts of up to 1.50 percentage points for the highest qualifying standards, while eligible retrofit projects can receive discounts linked to EPC improvement.
8. Are Ecology Building Society savings protected by FSCS?
Ecology currently states that eligible deposits are protected by the Financial Services Compensation Scheme up to £120,000 per eligible depositor under the standard limit. Product maximum balances can be higher than the amount protected.
9. Where is Ecology Building Society located?
Ecology’s main office is Ellis House, 7 Belton Road, Silsden, Keighley, West Yorkshire, BD20 0EE. Its first high-street branch opened in April 2026 at 44 Hannah Street, Porth, Rhondda Cynon Taf, CF39 9RA.
10. Is Building-society.org the official Ecology Building Society website?
No. Building-society.org is an independent information website. Use ecology.co.uk and Ecology’s official secure digital services whenever you need to open or manage an account, provide personal information, move savings or apply for a mortgage.