Improving your EPC rating can reduce energy costs, increase property value, and ensure compliance with MEES regulations. Whether you are preparing for a new tenancy, responding to a poor assessment, or planning ahead for future regulation changes, there are practical steps you can take to raise your score.
This page outlines the most effective improvements for rental properties in Oxfordshire, ranked by typical impact and cost-effectiveness.
Understanding Your Current Rating
Before making any improvements, it is important to understand what your current EPC tells you. The certificate includes a list of recommended measures, each with an estimated impact on your rating. These recommendations are tailored to your property and are a good starting point for planning upgrades.
If your EPC is several years old, consider getting a fresh assessment under the current RdSAP 10 methodology. Ratings can shift due to changes in assessment methods, even without any physical changes to the property.
High-Impact Improvements
The following upgrades typically deliver the greatest improvement to EPC scores:
Loft Insulation
Topping up loft insulation to at least 270mm is one of the most cost-effective improvements available. Older properties often have insufficient or compressed insulation that has lost effectiveness over time. This is usually straightforward to install and can improve your rating by several points.
Cavity Wall Insulation
If your property has unfilled cavity walls, insulating them can make a significant difference. Not all properties are suitable — solid-walled, stone, or timber-framed buildings require different approaches. A surveyor can confirm whether cavity wall insulation is appropriate for your property.
Boiler Replacement
Replacing an old, inefficient boiler with a modern condensing model can substantially improve your EPC rating. If the existing boiler is more than 15 years old, it is likely dragging down your score. Even upgrading heating controls alongside an existing boiler can help.
Double or Triple Glazing
Upgrading from single to double glazing improves both thermal performance and the EPC score. In conservation areas or listed buildings, secondary glazing may be an acceptable alternative where replacement windows are restricted.
Medium-Impact Improvements
Heating Controls
Installing a programmer, room thermostat, and thermostatic radiator valves (TRVs) is relatively low cost and can improve your rating. Smart thermostats are now recognised under RdSAP 10 and may provide additional benefit.
Hot Water Cylinder Insulation
If your property has a hot water cylinder, ensuring it has a factory-applied foam jacket or a British Standard cylinder jacket at least 80mm thick can improve the rating at minimal cost.
Draught-Proofing
Sealing gaps around windows, doors, letterboxes, and loft hatches reduces heat loss. While the individual impact on the EPC may be modest, it contributes to overall thermal performance and is inexpensive to implement.
Improvements for Older Properties
Oxfordshire has many older and period properties where standard improvements may not be suitable. Solid stone walls, listed building restrictions, and conservation area rules can limit your options. For detailed guidance on these situations, see our page on EPC advice for older and period properties in Oxfordshire.
Planning Your Improvements
When deciding which improvements to make, consider:
- Current EPC recommendations: Start with the measures listed on your certificate
- Cost versus impact: Loft insulation and heating controls offer the best return for most properties
- Property constraints: Listed buildings and conservation areas may require specialist advice
- Future regulations: If the minimum rises to C, plan improvements that will get you there rather than just meeting the current E threshold
- Tenant disruption: Some improvements can be carried out between tenancies to minimise disruption
Frequently Asked Questions
What is the cheapest way to improve an EPC rating?
Loft insulation top-up, hot water cylinder insulation, and draught-proofing are typically the lowest-cost improvements. Adding heating controls such as TRVs and a room thermostat is also relatively affordable.
How much can I improve my EPC rating?
This depends on your starting point and the property type. A combination of insulation, heating, and glazing improvements can move a property from an F or G to a D or even C in some cases.
Do I need to get a new EPC after making improvements?
Yes. Improvements are only reflected in your official rating when a new EPC assessment is carried out. The previous certificate remains valid for 10 years but will not show your upgrades.
Book an EPC Assessment
E8 Property Services can assess your property under the latest methodology and advise on the most effective improvements for your situation.
Book an EPC assessment or call 01865 339535 to discuss your property.