Mortgage Types UK 2026 — Fixed, Tracker, Offset, Interest-Only ExplainedGreen Mortgages UK Explained — Lower Rates for Energy-Efficient Homes
Guide to green mortgages in the UK. How they work, who offers them, eligibility requirements, and whether they're worth it for your home purchase or remortgage.
Green mortgages reward homeowners with energy-efficient properties. Here’s how they work and whether you could benefit.
What is a Green Mortgage?
Definition
A mortgage product offering better terms for properties with high energy efficiency, typically:
| Feature | How It Helps |
|---|
| Lower interest rate | Save on monthly payments |
| Cashback | Money towards home improvements |
| Fee discounts | Reduced arrangement costs |
| Additional borrowing | For energy improvements |
Why Lenders Offer Them
| Reason | Explanation |
|---|
| Lower default risk | Lower bills = more payment capacity |
| ESG targets | Environmental commitments |
| Government pressure | Net zero goals |
| Future-proofing | Energy regulations tightening |
Green Mortgage Types
1. EPC-Based Rate Discount
| Feature | Details |
|---|
| How it works | Better rate if EPC A or B |
| Typical discount | 0.1-0.2% off standard rate |
| Eligibility | Property must already qualify |
| Best for | Buying new builds or upgraded homes |
2. Green Additional Borrowing
| Feature | Details |
|---|
| How it works | Borrow extra for improvements |
| Typical amount | £5,000-15,000 extra |
| Must use for | Energy efficiency work |
| Best for | Homes needing upgrades |
3. Improvement Incentive
| Feature | Details |
|---|
| How it works | Get rate discount after improving EPC |
| Requirement | Improve by certain level (e.g., C to B) |
| Timeframe | Usually within 1-2 years |
| Best for | Homes you plan to upgrade |
EPC Ratings Explained
The Rating Scale
| Rating | Energy Efficiency | Green Mortgage Eligible? |
|---|
| A | Most efficient (92-100) | Yes — best rates |
| B | Very efficient (81-91) | Yes — most products |
| C | Good (69-80) | Some products |
| D | Average (55-68) | Limited options |
| E | Below average (39-54) | Rarely |
| F | Poor (21-38) | No |
| G | Very poor (1-20) | No |
UK Housing Stock
| EPC Rating | Percentage of Homes |
|---|
| A-B | ~5% |
| C | ~15% |
| D | ~45% |
| E-G | ~35% |
Most UK homes don’t currently qualify for green mortgages.
New Builds vs Existing Homes
| Property Type | Typical EPC |
|---|
| New builds (2022 onwards) | Usually A or B |
| Recent retrofit | Often C or B |
| Average older home | D |
| Victorian/Edwardian | Often E-F |
Current Green Mortgage Products
Major Lenders Offering Green Mortgages
| Lender | Product Name | Key Feature |
|---|
| Barclays | Green Home Mortgage | Rate discount + extra borrowing |
| NatWest | Green Mortgage | Lower rate for A/B |
| Halifax | Green Living Reward | Cashback for A/B |
| Santander | Green Additional Borrowing | Up to £15,000 extra |
| Nationwide | Green Additional Borrowing | £5,000-£15,000 |
| HSBC | Green Mortgages | Rate discount |
Products change frequently — verify current offerings.
Typical Rate Savings
| Standard Rate | Green Rate | Saving |
|---|
| 4.5% | 4.3% | 0.2% |
| 4.8% | 4.7% | 0.1% |
Real Cost Savings Example
| Mortgage Details | Standard | Green |
|---|
| Loan amount | £250,000 | £250,000 |
| Term | 25 years | 25 years |
| Interest rate | 4.5% | 4.3% |
| Monthly payment | £1,390 | £1,362 |
| Monthly saving | — | £28 |
| Total interest paid | £167,000 | £158,600 |
| Total saving | — | £8,400 |
Eligibility Requirements
Property Requirements
| Requirement | Typical |
|---|
| EPC rating | A or B (sometimes C) |
| Property type | Most residential |
| New build | Often automatically eligible |
| EPC certificate | Must be current |
Borrower Requirements
Same as standard mortgages:
| Requirement | Details |
|---|
| Income | Standard affordability |
| Credit score | Normal criteria |
| Deposit | Same LTV bands |
| Employment | Usual requirements |
Getting Your EPC Improved
Common Improvements
| Improvement | Cost | EPC Impact |
|---|
| Loft insulation | £300-500 | +1-3 points |
| Cavity wall insulation | £500-1,500 | +5-10 points |
| Double glazing | £3,000-7,000 | +3-5 points |
| Smart heating controls | £200-400 | +1-2 points |
| Solar PV panels | £5,000-8,000 | +10-15 points |
| Air source heat pump | £8,000-15,000 | +15-25 points |
Return on Investment
| Improvement | Cost | Annual Energy Saving |
|---|
| Loft insulation | £400 | £200-300 |
| Cavity wall | £1,000 | £250-350 |
| Smart thermostat | £300 | £100-150 |
| Heat pump | £10,000 | £300-600 |
Green Mortgage vs Standard: Comparison
When Green Makes Sense
| Situation | Recommendation |
|---|
| Buying new build | Yes — likely EPC A/B anyway |
| Home already EPC A/B | Yes — take the better rate |
| Planning improvements | Yes — use additional borrowing |
| No improvement plans | May not be worth it |
When Standard May Be Better
| Situation | Why |
|---|
| Home is EPC D-G | Won’t qualify |
| Green rate isn’t actually cheapest | Always compare market |
| Borrowing extra but won’t improve | Terms may be restrictive |
Additional Borrowing for Improvements
How It Works
| Step | Action |
|---|
| 1 | Apply for green mortgage with additional amount |
| 2 | Funds released at completion |
| 3 | Complete improvements (usually within 2 years) |
| 4 | Provide proof of work done |
| 5 | EPC reassessment if required |
What You Can Spend It On
| Eligible | Not Eligible |
|---|
| Insulation | General repairs |
| Solar panels | Extensions |
| Heat pumps | New kitchen |
| Double glazing | Cosmetic changes |
| Smart heating | Garden work |
| EV charger | — |
Typical Terms
| Feature | Details |
|---|
| Amount available | £5,000-15,000 |
| Rate | Often same as mortgage |
| Proof required | Invoices, photos |
| Timeframe | Usually 12-24 months |
First-Time Buyers and Green Mortgages
Benefits
| Benefit | Details |
|---|
| Lower payments | Rate discount helps affordability |
| New builds | Often EPC A/B already |
| Future-proofing | No worry about EPC regs |
Considerations
| Factor | Think About |
|---|
| New build premium | Are you paying more for EPC A? |
| Older home potential | Could improve after purchase |
| Availability | May limit property choice |
Remortgaging to Green
Can You Switch?
| Current Situation | Options |
|---|
| EPC A/B already | Switch to green product |
| EPC C-D | May qualify with some lenders |
| EPC E-G | Improve first, then switch |
Steps to Remortgage
| Step | Action |
|---|
| 1 | Check current EPC |
| 2 | Compare green products |
| 3 | Consider improvement + remortgage |
| 4 | Apply as normal remortgage |
Future of Green Mortgages
Regulatory Direction
| Trend | Impact |
|---|
| EPC C by 2035 (proposed) | All rentals must reach C |
| Net zero targets | More pressure on efficiency |
| Mortgage lending rules | May factor in energy costs |
What to Expect
| Change | Likelihood |
|---|
| More green products | Very likely |
| Bigger rate discounts | Possible |
| Penalties for poor EPC | Possible |
| Standard affordability to include energy | Being discussed |
Summary: Is a Green Mortgage Right for You?
| Question | If Yes |
|---|
| Is property EPC A or B? | Check green rates |
| Buying a new build? | Very likely to qualify |
| Planning improvements? | Consider additional borrowing |
| Is the rate actually better? | Always compare whole market |
| Will you stay long-term? | More lifetime savings |
Bottom line: Green mortgages offer genuine savings for qualifying homes, but always compare with standard products to ensure you’re getting the best deal overall.
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- /mortgages/mortgage-types/green-mortgages-explained/
Your home may be repossessed if you do not keep up repayments on your mortgage. PocketWise provides information and guidance — we do not offer financial advice. Seek independent mortgage advice before making decisions about borrowing.
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