EPC Ratings Explained: How to Improve Your Score for Free in Lancashire
An EPC (Energy Performance Certificate) rates your home’s energy efficiency from A (most efficient) to G (least efficient). In Lancashire, around 60% of homes sit at band D or below, meaning there is significant room for improvement. The good news is that several of the changes that push your rating up cost nothing or very little to do yourself.
What Is an EPC Rating and Why Does It Matter?
Your EPC is a standardised assessment of how energy efficient your home is. An assessor visits your property, checks things like insulation levels, window glazing, heating systems, and lighting, then produces a certificate scoring your home from 1 to 100. That score maps to a letter band:
A (92-100): Extremely efficient. Very few homes reach this level.
B (81-91): Most new-build homes fall here.
C (69-80): The government’s target for all homes by 2035.
D (55-68): The most common band for Lancashire homes.
E (39-54): Common in older terraces and stone-built properties.
F (21-38): Poor efficiency, high energy bills.
G (1-20): Very poor. Often uninsulated homes with old heating systems.
Your EPC matters for three key reasons. First, if you are selling your home, you legally need a valid EPC (they last 10 years). Buyers increasingly factor energy efficiency into their decisions, and homes with better ratings can command higher prices. Second, if you are a landlord, your rental property must have a minimum EPC of E (and this is expected to rise to C for new tenancies in the coming years). Third, many government grants, including government energy efficiency schemes, use your EPC rating to determine eligibility.
Typical EPC Ratings Across Lancashire
Lancashire’s housing stock is diverse. You will find everything from Victorian terraces in Burnley and Blackburn to 1930s semis in Preston and modern estates in Chorley. Each type tends to cluster around certain EPC bands:
Pre-1930 terraces (BB, PR, LA postcodes): Typically rated E or F. Solid walls, single-glazed or early double-glazed windows, and older boilers drag scores down.
1930s-1960s semis (PR, FY postcodes): Usually D or low C. Cavity walls (sometimes unfilled), partial loft insulation, and a mix of old and newer heating systems.
1970s-1990s homes: Often C or D. Better insulation standards than older homes but often with ageing boilers or inefficient heating controls.
Post-2000 builds: Mostly B or C. Built to more modern regulations with double glazing, cavity wall insulation, and condensing boilers as standard.
According to government data, the average EPC score across Lancashire is around band D (score 58). That is roughly in line with the England average, but it means most homes have clear scope for improvement.
Free Ways to Improve Your EPC Rating
Here are the changes you can make at zero cost that your EPC assessor will pick up on. Each one can nudge your score up by a few points, and combined, they could move you into the next band.
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1. Switch All Lighting to LED Bulbs
This is one of the simplest and most impactful free (or near-free) improvements. The EPC assessment looks at your lighting and assigns a score based on the proportion of low-energy bulbs. If your home still has halogen spotlights or old incandescent bulbs, swapping them for LEDs can add 3-5 points to your EPC score.
LED bulbs now cost as little as £1-£2 each and last 15,000-25,000 hours. A home with 20 light fittings that switches entirely to LED can save around £40-£60 a year on electricity too.
EPC impact: +3 to +5 points. Cost: £10-£40 for a whole house, or free if you already have LEDs to hand.
2. Draught-Proof Doors, Windows and Floors
Draught-proofing is specifically mentioned in EPC recommendations, and assessors check for it. Self-adhesive foam strips around doors and windows, a brush strip along the bottom of external doors, and covering unused chimneys with a chimney balloon can all improve your score.
Lancashire’s older terraced houses in areas like Accrington, Darwen and Nelson often have particularly draughty sash windows and original doors. Even basic draught-proofing makes a noticeable difference to both comfort and your EPC.
EPC impact: +1 to +3 points. Cost: Free-£20.
3. Top Up Loft Insulation
The recommended depth for loft insulation is 270mm (about 10.5 inches). Many Lancashire homes, especially those built before the 1990s, have only 100-150mm. If you already have some insulation, topping it up to 270mm is straightforward and can be done yourself with rolls of mineral wool from any DIY store.
If you are on a qualifying benefit, the government energy efficiency scheme may cover the cost of loft insulation entirely, making it genuinely free. Even without government energy efficiency schemes, a DIY loft insulation top-up costs around £100-£200 in materials and can add 5-10 points to your EPC.
EPC impact: +5 to +10 points. Cost: Free through government energy efficiency schemes, or £100-£200 DIY.
4. Fit a Hot Water Cylinder Jacket
If you have a hot water tank (common in homes with conventional boiler systems rather than combi boilers), an insulating jacket makes a clear difference to your EPC. A British Standard jacket that is at least 80mm thick costs around £15-£25 and takes minutes to fit.
This is one of those improvements where the EPC impact is disproportionately large for the cost involved. Assessors specifically look at cylinder insulation, and going from no jacket to a proper one can add 2-4 points.
EPC impact: +2 to +4 points. Cost: £15-£25.
Which Improvements Give the Biggest EPC Jumps?
Not all improvements are equal when it comes to shifting your EPC score. Here is a rough guide to what moves the needle most:
| Improvement | Typical EPC Points Gained | Approximate Cost |
|---|---|---|
| Cavity wall insulation | +10 to +20 | Free (government energy efficiency schemes) or £500-£1,500 |
| Loft insulation (0 to 270mm) | +10 to +15 | Free (government energy efficiency schemes) or £300-£500 |
| Loft insulation top-up (100mm to 270mm) | +5 to +10 | Free (government energy efficiency schemes) or £100-£200 |
| New condensing boiler | +10 to +15 | £2,000-£3,500 |
| LED lighting (whole house) | +3 to +5 | £10-£40 |
| Hot water cylinder jacket | +2 to +4 | £15-£25 |
| Draught-proofing | +1 to +3 | Free-£20 |
| Heating controls (room thermostat + TRVs) | +3 to +6 | £150-£350 |
| Double glazing (from single) | +5 to +10 | £3,000-£7,000 |
For a typical Lancashire terrace rated E (score 45), combining LED lighting (+4), draught-proofing (+2), a cylinder jacket (+3) and a loft insulation top-up (+7) could push the score to around 61 – that is a D rating, and it gets you closer to qualifying for fewer EPC-related restrictions if you rent the property out.
government energy efficiency schemes: Free Funded Improvements for Lancashire Homes
The government energy efficiency scheme (government energy efficiency scheme) runs until March 2026 and provides fully funded insulation and heating improvements to eligible households. To qualify, you generally need to:
– Be receiving a qualifying benefit (such as Universal Credit, pension top-up benefits, Child Tax Credit, or income support benefits)
– Live in a home with an EPC rating of D, E, F, or G
– Own or privately rent your home
Through government energy efficiency schemes, Lancashire homeowners have received free cavity wall insulation, free loft insulation, boiler upgrades, and even first-time central heating systems. The scheme aims to raise homes to at least EPC band C where possible.
Local authorities in Lancashire, including Preston City Council, Blackburn with Darwen Borough Council, and Burnley Borough Council, can also provide referrals through their own schemes. If you are unsure whether you qualify, it costs nothing to check.
Frequently Asked Questions
How much does an EPC assessment cost in Lancashire?
An EPC assessment in the Lancashire area typically costs between £50 and £85 depending on the size of your property. You will need one if you are selling or renting out your home. EPCs are valid for 10 years, so if you have had one done since 2015, it may still be current. You can check your existing EPC for free on the EPC register.
Can I improve my EPC rating without spending any money?
Yes. Switching to LED bulbs (if you already have them available), draught-proofing with materials you have at home, and ensuring your heating controls are set correctly are all free actions that assessors consider. If you qualify for government energy efficiency schemes, you could also get insulation and heating improvements at no cost. Combined, these free measures could improve your score by 5-10 points.
What EPC rating do I need to rent out a property in Lancashire?
Currently, rental properties in England and Wales need a minimum EPC rating of E. The government has indicated plans to raise this to C for new tenancies, though the exact timeline has been subject to delays. If you are a landlord in Lancashire, it is worth getting ahead of this change now while funded improvements through government energy efficiency schemes are still available.
Does a better EPC rating increase my house value?
Research suggests it can. A study by the Department of Energy Security and Net Zero found that homes with an EPC rating of C or above sold for around 3-5% more than equivalent homes rated D or below. For an average Lancashire home valued at £180,000, that could mean an extra £5,400-£9,000 on the sale price, well above the cost of most energy efficiency improvements.
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