Highlights
From 2025 onwards, the government has continued to tighten EPC requirements for rental properties across England. If you are a Portsmouth landlord, you need to be ahead of the changes now.
At present, every rental property must have a valid EPC rating of at least E before a tenancy can begin.
The proposed minimum rating is expected to rise to C, which could affect a large number of older rental properties across Portsmouth.
An EPC stays valid for 10 years. But if you have done significant work on the property since your last assessment, get a new one done.
Failing to meet EPC requirements can result in fines of up to £30,000.
Improvements like better insulation, double glazing, and modern heating systems are among the most effective ways to raise your rating.
Some properties may qualify for exemptions, but these must be properly registered on the PRS Exemptions Register.
Always use qualified professionals for structural or energy efficiency work. Poor workmanship causes bigger and more expensive problems down the line.
If you own a rental property in Portsmouth, 2026 is not a year to overlook. Energy Performance Certificate (EPC) requirements have become stricter for some time, and landlords across England are now feeling the impact. This is especially true for landlords who own older properties in Portsmouth, where many homes were built long before energy efficiency became a priority.
Portsmouth has plenty of character-filled Victorian and Edwardian homes. These properties offer charm and history, but they are not always the easiest to heat efficiently. That is one of the main reasons the government is pushing for higher energy standards across the private rental sector. Improving the energy performance of rental homes has become an essential part of being a landlord.
If you are unsure about the current EPC requirements or how they affect your property, this guide will help. As local Portsmouth builders, we will explain the rules, what they mean for landlords, the improvements you may need to make, and the practical steps you can take to stay compliant without unnecessary stress.
What Is an EPC and Why Does It Matter So Much Right Now?
An Energy Performance Certificate rates a property’s energy efficiency on a scale from A to G. A is the best. G is the worst. An accredited energy assessor comes out, assesses your heating system, insulation, windows, lighting, and a handful of other factors, and produces a rating based on what they find. It is not a test of how warm the property actually feels on a cold Tuesday in January. It is a theoretical assessment based on the features present.
For landlords, the EPC is a legal requirement. You cannot market a property for rent without one, and tenants must receive a copy before they move in. That rule has been in place since 2008, so most landlords are across it. What has shifted is the minimum standard required and the consequences of falling short of it.
Here are some of the main reasons EPCs have become such an important topic for landlords.
The Government Has Made Its Direction Clear
The drive to improve energy efficiency in privately rented homes has been building for years. What has changed is the pace. The Minimum Energy Efficiency Standards already require rental properties in England to achieve at least an E rating, and the expected move towards a minimum C rating has made many landlords take a closer look at their properties.
Leaving improvements until the last minute can be costly. As deadlines approach, demand for contractors increases, availability becomes limited, and prices often rise. Planning gives you more time to budget properly and complete any necessary work without pressure. You can check the official government guidance on EPC requirements for landlords.
Tenants Are Paying Attention to Energy Costs
Energy bills remain a major concern for many households. As a result, tenants are paying closer attention to a property’s running costs before deciding where to live. Properties with lower EPC ratings can be less appealing because they are more expensive to heat.
On the other hand, homes with stronger energy performance are generally warmer, cheaper to run, and more attractive to long-term tenants. For Portsmouth landlords, this can make a significant difference. The local rental market is competitive, and properties with better energy ratings have an advantage when attracting and retaining tenants.
The Fines Are Not Small
Failing to meet minimum EPC requirements can result in fines of up to £30,000. Local authorities have the power to enforce these rules, and landlords should not assume penalties are unlikely to happen. When you compare the cost of improving a property’s energy efficiency with the potential cost of a fine, taking action early makes far more financial sense. It also helps avoid the stress of upgrading under tight deadlines.
Portsmouth’s Housing Stock Faces Unique Challenges
A large proportion of Portsmouth’s rental properties are older homes, including Victorian terraces, converted period buildings, and traditional flats. While these properties have plenty of character, they were built long before modern energy efficiency standards existed.
Many have solid walls rather than cavity walls, older heating systems, and limited insulation. As a result, they can lose heat more quickly than newer homes. This means some Portsmouth landlords may have a larger gap to close when meeting future EPC requirements. In many cases, improvements can take time to plan and complete, making early action even more important.
It Connects Directly to Building Work
EPC improvements are not always limited to changing light bulbs or upgrading a boiler. In many properties, raising an EPC rating may involve more substantial work such as insulation upgrades, replacement windows, rendering, or alterations to accommodate modern heating systems. These improvements need to be carried out properly. Poor workmanship can lead to issues such as damp, condensation, and costly repairs later on.
That is why working with a qualified and experienced building contractor is so important. The right team can ensure improvements are completed to a high standard and support your property’s long-term performance and value.
The Most Common Improvements for Portsmouth Rental Properties
Insulation
Improving insulation is one of the easiest and most cost-effective ways to increase an EPC rating. Loft insulation and cavity wall insulation can make a noticeable difference without requiring major disruption. For older Portsmouth properties with solid walls, solid wall insulation may be recommended. While it involves a larger investment, it can significantly improve energy efficiency. If your property has little or no insulation, this is one of the biggest reasons for a lower EPC rating.
Heating Systems
Older heating systems can have a major impact on your EPC score. If your property still relies on an ageing boiler, upgrading to a modern condensing boiler could improve both energy efficiency and running costs. In some cases, a heat pump may also be worth considering. If a boiler replacement has been on your to-do list for a while, now may be the ideal time to move forward.
Windows and Doors
Single-glazed windows can allow a significant amount of heat to escape from a property. Double glazing is now the standard choice for improving energy efficiency, while some homes may benefit from triple glazing. Simple measures such as draught proofing doors and sealing gaps around window frames can also help improve your property’s overall performance. Here, you can get our complete home renovation services that will help you move the needle.
Lighting
This is one of the simplest upgrades you can make. Replacing older incandescent or halogen bulbs with LED lighting is inexpensive, quick, and can contribute to your EPC rating.
Solar Panels
For suitable properties, solar panels can provide a noticeable boost to an EPC rating. They are becoming increasingly popular with landlords who own the freehold and want to improve energy efficiency and reduce long-term energy costs. They can also make a property more appealing to tenants who are conscious of their monthly bills.
Our gallery showcases a range of renovation and structural improvement projects completed across Portsmouth. It shows how our works can improve both the energy performance and overall condition of a rental property.
How Portsmouth Builders Can Help You Get Compliant
Getting EPC improvement does not end at achieving a certain rating on a certificate. You need to make your property more energy-efficient, creating a comfortable home for tenants, and avoiding issues that could cost you more in the future. Poorly installed insulation can lead to problems such as damp and condensation. Heating systems that are not fitted correctly may perform poorly and could even affect your insurance cover. These are the kinds of issues that can arise when work is rushed or carried out by inexperienced contractors.
As a reputable Portsmouth building company, our team assesses your property’s needs, works with your energy assessor’s recommendations, and completes the necessary improvements to a high standard. So, the work is done properly the first time, giving you confidence that your property is ready for the future.
As environmental builders, we understand the importance of energy-efficient construction and renovation. We deliver practical improvements that not only help meet compliance requirements but also provide lasting benefits for your property. If you would like advice on improving your property’s EPC rating or understanding what work may be required, get in touch with us. We will be happy to discuss your options and help you plan the next steps.
What You Need to Do as a Portsmouth Landlord Before Renting in 2026
Getting prepared does not have to be complicated, but it is important to take action sooner rather than later. Use this simple checklist to help keep your property compliant:
Arrange an up-to-date EPC assessment.
Review the recommendations in your EPC report.
Check whether your property qualifies for an exemption.
Speak with a qualified building team about any recommended upgrades.
Schedule improvement work early.
Look into available funding schemes.
Provide tenants with an updated EPC.
Final Words
EPC requirements are only becoming stricter, so if your Portsmouth rental property is below a C rating, do not wait any longer. The good news is that many properties need a few targeted improvements to boost their rating. By understanding where your property stands and planning upgrades early, you can avoid unnecessary stress and stay ahead of future requirements.
If you need advice on improving your property’s energy performance, our team is here to help. Feel free to explore our blogs for more guidance or get in touch to discuss your next steps.
FAQ
Yes, you do. Every privately rented property in England must have a valid EPC with a minimum rating of E before a tenancy begins. Our strong advice is to get yours checked now, especially with the expected rise to a C minimum on the horizon. Do not leave it until a tenant is ready to move in.
Right now the legal minimum is E. However, the government has been moving towards requiring a C rating for all new tenancies, and we would encourage every Portsmouth landlord to treat C as the target to work towards, not just E. Getting ahead of it saves money and stress later.
It depends entirely on your starting point and the property type. Small improvements like LED lighting and draught-proofing cost very little. Insulation and boiler upgrades typically run into the low to mid thousands. Full solid wall insulation on an older terrace can be more. The cap on landlord spending under the current exemption rules is £3,500. But many landlords spend more to get the rating they need and future-proof the investment.
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