Landlords in Corby find the cheapest way to reach EPC C

Uncover what’s holding your EPC Corby back

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Find your EPC

Enter your postcode in Corby, select your Corby 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 Corby 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 Corby rental.

find your epc Corby

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

Why this matters now for Corby landlords

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

EPC Assessor Corby

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 Corby, where the average poor-rated rental property SAP scores just 63.2, 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, 118 rental properties in Corby are below that threshold. That's 20.74% of all rental stock in the Corby 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 Corby, 111 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 Corby landlords don’t realise the goal posts are changing before the deadline arrives.

Uncover the hidden defaults affecting your Corby EPC rating

Most EPC certificates rely on "worst-case" assumptions when information is missing - and in Corby, those hidden defaults are likely dragging ratings down across 802 Corby 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 Corby, assumed floor defaults are the most common culprit - affecting properties across North Northamptonshire 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 Corby, 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 63.2 across the area, many properties are closer to EPC C than their certificate suggests.

Small fixes can = big gains

111 rental homes in Corby 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 Corby

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

Small changes could push you to EPC C

Try our interactive demo to simulate Corby EPC ratings in real time

Estimated EPC Rating
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GFEDCBA
EPC C sits at ~75% of the scale
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Estimated outcome
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Find out whats holding your Corby 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 569 Corby rental properties.

Instant access • Used by Corby landlords & agents

EPC insights in Corby

We've analysed EPC data from 569 rental homes in Corby.

111 Corby 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. 118 poorly rated rental homes in Corby are below EPC rating C, representing 20.74% of the latest EPC records. Most are houses in Corby, North Northamptonshire, with an average poor EPC score of 63.2.

What this means for landlords in Corby

  • 111 Corby rental homes are rated EPC D and are just a few points from reaching EPC C.
  • 802 Corby 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: 569
Total below EPC C: 118
Share poor (D-G): 20.74%
Distinct UPRNs: 569
Distinct poor UPRNs: 118
Avg poor EPC score: 63.2

Corby EPC rating bands

Band Property Count
C 423
D 111
B 28
E 7

Low EPC rated postcodes in Corby

Postcode Below EPC C
NN18 9JS 3
NN17 2TU 3
NN17 1BB 3
NN17 2NY 2
NN17 1YQ 2
NN17 1PP 2
NN17 1LD 2
NN17 1FH 2
NN17 1DE 2
NN17 1BU 2

Landlord EPC questions for Corby

118 rental properties in Corby are currently rated below EPC C (bands D–G), representing 20.74% of the latest EPC records in North Northamptonshire.

From 1 October 2030, all privately rented properties in England including those in Corby 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 Corby can still be legally let. However from 1 October 2030 the minimum standard rises to EPC C. In Corby, 111 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 Corby, the cheapest route is usually to address assumed defaults first — 802 properties in Corby 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 Corby, 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 Corby, 802 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 Corby, where the average poor-rated property scores 63.2, 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 Corby 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 Corby with the highest concentration of below-EPC-C rental properties include NN18 9JS, NN17 2TU, NN17 1BB. 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 Corby is 63.2. EPC C begins at a score of 69, meaning the average below-C property in Corby needs to gain approximately 6 points to reach compliance.

Other areas in North Northamptonshire

Landlord EPC Braybrooke
1 properties · 100.0% below EPC C
Landlord EPC Burton Latimer
1 properties · 0.0% below EPC C
Landlord EPC Earls Barton
2 properties · 100.0% below EPC C
Landlord EPC Ecton
1 properties · 100.0% below EPC C
Landlord EPC Higham Ferrers
1 properties · 100.0% below EPC C
Landlord EPC Kettering
986 properties · 29.6% below EPC C
Landlord EPC Oundle
1 properties · 100.0% below EPC C
Landlord EPC Raunds
1 properties · 100.0% below EPC C
Landlord EPC Rothwell
2 properties · 100.0% below EPC C
Landlord EPC Rushden
668 properties · 14.2% below EPC C
Landlord EPC Stoke Albany
1 properties · 100.0% below EPC C
Landlord EPC Sudborough
1 properties · 100.0% below EPC C
Landlord EPC Twywell
1 properties · 100.0% below EPC C
Landlord EPC Wellingborough
876 properties · 26.5% below EPC C
Landlord EPC Wollaston
1 properties · 100.0% below EPC C

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