Landlords in Lower Llanrumney find the cheapest way to reach EPC C

Uncover what’s holding your EPC Lower Llanrumney back

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Find your EPC

Enter your postcode in Lower Llanrumney, select your Lower Llanrumney rental property and your current EPC is instantly pulled from the official government register.

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We reveal what’s holding you back

We analyse your Lower Llanrumney rental property and highlight hidden assumptions, missing data, and low-impact areas automatically.

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See exactly how to improve it

Test upgrades in real time and discover the cheapest route to EPC C for your Lower Llanrumney rental.

find your epc Lower Llanrumney

No guesswork. No unnecessary upgrades. Just a clear route to EPC compliance Lower Llanrumney.

Why this matters now for Lower Llanrumney landlords

Two changes are coming — and together, they make timing critical.

EPC Assessor Lower Llanrumney

The rules are getting harder

The current EPC system (RdSAP 10) is being replaced by the Home Energy Model (HEM), rolling out late 2026. The same property is likely to score lower under HEM — making EPC C harder and much more expensive to achieve. In Lower Llanrumney, where the average poor-rated rental property SAP scores just 65.9, that gap will be even harder to close under the new methodology.

The law arrives in 2030

From 2030, rental properties below EPC C may not be legally let - putting rental income at risk. Right now, 10 rental properties in Lower Llanrumney are below that threshold. That's 20.83% of all rental stock in the Lower Llanrumney area that could become unlettable without action.

Act now and secure your grandfather rights

Achieve EPC C under today's rules and your rating is typically valid for 10 years - meaning you lock in compliance before the methodology changes. In Lower Llanrumney, 10 properties are rated EPC D and are just a few points away. Many could get there through evidence alone, without major retrofit work.

Lock In Now

Get to EPC C now before it gets harder → keep that rating for 10 years → avoid stricter future requirements.

Most Lower Llanrumney landlords don’t realise the goal posts are changing before the deadline arrives.

Uncover the hidden defaults affecting your Lower Llanrumney EPC rating

Most EPC certificates rely on "worst-case" assumptions when information is missing - and in Lower Llanrumney, those hidden defaults are likely dragging ratings down across 50 Lower Llanrumney rental properties right now

Defaults penalise your score

When an assessor cannot verify insulation or specific heating controls, the software defaults to the lowest possible performance. In Lower Llanrumney, assumed floor defaults are the most common culprit - affecting properties across Cardiff and silently pulling scores below the EPC C threshold. We identify exactly where these assumptions are reducing your rating.

Evidence can help your rating

For houses typical of Lower Llanrumney, proving what's already there - loft insulation, glazing records, heating controls - can significantly improve your EPC score without spending anything on physical upgrades. With an average poor EPC score of 65.9 across the area, many properties are closer to EPC C than their certificate suggests.

Small fixes can = big gains

10 rental homes in Lower Llanrumney are rated EPC D - just a handful of points from compliance. With our real-time interactive EPC analysis, we show you exactly how upgrades or evidence submissions can move your score, with instant results before you spend a penny.

Landlord EPC Lower Llanrumney

We uncover the hidden defaults and turn your Lower Llanrumney EPC into a clear action plan

Small changes could push you to EPC C

Try our interactive demo to simulate Lower Llanrumney EPC ratings in real time

Estimated EPC Rating
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EPC C sits at ~75% of the scale
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Find out whats holding your Lower Llanrumney EPC rating back

See exactly what's holding your rating back and how to reach EPC C for the lowest cost - using real data from 48 Lower Llanrumney rental properties.

Instant access • Used by Lower Llanrumney landlords & agents

EPC insights in Lower Llanrumney

We've analysed EPC data from 48 rental homes in Lower Llanrumney.

10 Lower Llanrumney Rental Homes May Reach EPC C Without Major Upgrades Many landlords may be able to reach EPC compliance with minor evidence-led upgrades rather than expensive retrofit work. 10 poorly rated rental homes in Lower Llanrumney are below EPC rating C, representing 20.83% of the latest EPC records. Most are houses in Lower Llanrumney, Cardiff, with an average poor EPC score of 65.9.

What this means for landlords in Lower Llanrumney

  • 10 Lower Llanrumney rental homes are rated EPC D and are just a few points from reaching EPC C.
  • 50 Lower Llanrumney rental homes rely on assumed defaults, which significantly reduce the EPC ratings.
  • Manual evidence may unlock Band C faster than major retrofit work.
  • Houses dominate poor ratings, so loft insulation, glazing verification, and heating controls are often the biggest wins.
Total latest records: 48
Total below EPC C: 10
Share poor (D-G): 20.83%
Distinct UPRNs: 48
Distinct poor UPRNs: 10
Avg poor EPC score: 65.9

Lower Llanrumney EPC rating bands

Band Property Count
C 38
D 10

Low EPC rated postcodes in Lower Llanrumney

Postcode Below EPC C
CF3 5NG 2
CF3 5QQ 1
CF3 5QP 1
CF3 5QN 1
CF3 5QG 1
CF3 5LZ 1
CF3 5LY 1
CF3 5JU 1
CF3 4JA 1

Landlord EPC questions for Lower Llanrumney

10 rental properties in Lower Llanrumney are currently rated below EPC C (bands D–G), representing 20.83% of the latest EPC records in Cardiff.

From 1 October 2030, all privately rented properties in England including those in Lower Llanrumney must achieve a minimum EPC rating of C to be legally let. Fines of up to £30,000 per property apply for non-compliance. There is a £10,000 cost cap per property on required improvements.

Currently yes — EPC D properties in Lower Llanrumney can still be legally let. However from 1 October 2030 the minimum standard rises to EPC C. In Lower Llanrumney, 10 properties are rated EPC D and are only a few points from compliance, meaning many could reach EPC C through low-cost evidence or minor upgrades.

For houses typical of Lower Llanrumney, the cheapest route is usually to address assumed defaults first — 50 properties in Lower Llanrumney are affected by assumed floor defaults. Providing evidence of existing insulation or heating controls costs little and can improve the EPC score without physical work. Common low-cost wins include loft insulation certificates, glazing records, and heating control verification.

Most EPC certificates use worst-case assumptions when an assessor cannot verify insulation or heating controls. In Lower Llanrumney, assumed floor defaults are the most common cause of artificially low ratings. These assumed defaults can significantly reduce your score even if your property is well insulated. Providing evidence to the assessor — such as installer certificates or photos — can improve the rating without any physical upgrades.

Assumed defaults are worst-case values applied by EPC software when an assessor cannot verify a property's insulation, construction, or heating controls. They are one of the most common reasons EPC ratings are lower than they should be. In Lower Llanrumney, 50 rental properties are currently affected by assumed defaults — meaning their true performance may be better than their certificate suggests.

The Home Energy Model (HEM) is replacing the current RdSAP 10 EPC methodology from late 2026. Properties are likely to score lower under HEM, making EPC C harder and more expensive to achieve. In Lower Llanrumney, where the average poor-rated property scores 65.9, the gap will be harder to close under the new methodology. Landlords who achieve EPC C under today's rules will hold that rating for 10 years, protecting them from stricter future requirements.

Yes — EPC exemptions are available to landlords in Lower Llanrumney in specific circumstances. These include a cost cap exemption (if you have spent up to £10,000 and still cannot reach EPC C), a third-party consent exemption (where a freeholder or planning authority refuses permission), and a property devaluation exemption (if improvements would reduce the property's value by more than 5%). Exemptions must be registered on the PRS Exemptions Register and are valid for up to 10 years. Read our full EPC exemptions guide →

Based on the latest EPC records, the postcodes in Lower Llanrumney with the highest concentration of below-EPC-C rental properties include CF3 5NG, CF3 5QQ, CF3 5QP. Properties in these postcodes are statistically more likely to be affected by assumed defaults or to benefit from targeted low-cost upgrades.

The average EPC efficiency score for poorly rated rental properties in Lower Llanrumney is 65.9. EPC C begins at a score of 69, meaning the average below-C property in Lower Llanrumney needs to gain approximately 4 points to reach compliance.

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