The lettings market in Hertfordshire is evolving fast, and one of the biggest shifts on the horizon is the 2026 deadline for minimum energy efficiency standards. From that point, any new tenancies will likely require rental homes to meet an EPC rating of at least band C.
For landlords with older properties, this presents both a challenge and an opportunity. While some upgrades will require upfront investment, the long-term returns – in terms of rental yield, property value, and tenant appeal – could be significant.
In this guide, we’ll explain what the changes mean, how to upgrade a Hertfordshire rental property to an EPC C rating, and what support is available.
Why EPC standards are changing
The UK government has committed to net-zero carbon emissions by 2050. As part of this, homes across the country need to become more energy efficient. Currently, around 60 per cent of private rental homes in England fall below EPC band C.
That’s where the updated Minimum Energy Efficiency Standards (MEES) come in. From 2026, all new rental tenancies will likely require an EPC rating of C or above. By 2028, this may apply to all existing tenancies too.
Failing to meet these standards could mean not being able to legally let the property. That’s why landlords need to start planning now.
What this means for landlords in Hertfordshire
If you’re a landlord in Hertfordshire, it’s time to assess your current EPC ratings. Many older properties in the region – including Victorian terraces, Edwardian semis, and 1930s homes – typically hold EPC ratings of D or E.
These charming homes make up a big portion of the local lettings market, particularly in areas like Hitchin, Letchworth, and Welwyn Garden City. However, their age and traditional construction methods often mean poor insulation, single-glazed windows, and inefficient boilers.
Bringing these properties up to an EPC C rating is achievable, but it takes careful planning and smart investment. It’s also essential if you want to remain competitive and compliant.
Common EPC issues in older homes
Older properties typically struggle with energy efficiency due to:
- Poor loft or wall insulation
- Outdated boilers or heating systems
- Draughty single-glazed windows
- No thermostatic controls
- Inefficient lighting
All of these elements can drag your EPC score down. However, they also present opportunities for improvement.
Cost-effective ways of updating older properties to EPC C
Not every improvement has to break the bank. In fact, some of the most effective upgrades are relatively affordable:
- Loft insulation – Adding or topping up to 270mm can increase your EPC score significantly
- Cavity wall insulation – Suitable for many homes built after 1920
- Upgrading to a modern condensing boiler
- Installing double glazing or secondary glazing
- Fitting smart heating controls like thermostats and TRVs
- Switching to LED lighting throughout
A combination of these changes could move a property from a D to a C rating, depending on its starting point. For landlords with several properties, these improvements can often be done in phases.
What can you expect to pay?
Here are some rough estimates for typical upgrade costs:
- Loft insulation: £450 – £600
- Cavity wall insulation: £800 – £1,500
- Boiler replacement: £2,000 – £3,500
- Double glazing: £4,000 – £6,000 for a small house
- Smart thermostat: £200 – £300
Costs can vary based on property size and specification, but landlords who plan early can spread the investment over time.
Landlord grants Hertfordshire landlords can explore
The good news is there may be help available. Some local authorities and national schemes are offering financial support to landlords upgrading rental properties. In 2026, options may include:
- Boiler Upgrade Scheme – Offers grants of up to £5,000 towards replacing gas boilers with low-carbon alternatives
- ECO4 scheme – Focuses on improving homes for low-income tenants, covering insulation, heating and more
- Local Authority Delivery (LAD) scheme – Funding for landlords letting to tenants in lower income brackets
- Green Deal loans – Loans repaid through energy bill savings
Eligibility varies, so it’s worth speaking with your local council or a retrofit coordinator to explore your options.
How to check your property’s EPC rating
Every property legally rented must have a valid Energy Performance Certificate. If you’re not sure what yours is, you can check on the government EPC register online using your property’s postcode.
The certificate will tell you:
- The current EPC band (A to G)
- The potential score with improvements
- Estimated costs and savings
This is a useful starting point for planning what to upgrade first.
Planning your route to compliance
With the deadline getting closer, it makes sense to start now. Here’s a suggested approach:
- Get a fresh EPC assessment if yours is older than 10 years or if you’ve made any changes
- Speak to a local expert – Our lettings team can help identify upgrade opportunities
- Prioritise low-cost, high-impact fixes first
- Budget for larger improvements over the next 12 to 24 months
- Reassess the property’s value and rental potential after improvements
Remember, homes with a higher EPC rating often let faster and can attract higher rents.
Will EPC upgrades add value to my rental property?
Yes, in most cases. Properties with an EPC rating of C or above are increasingly attractive to both tenants and buyers. In fact, Zoopla research suggests that energy-efficient homes can command up to 16 percent more than similar properties with lower ratings.
In Hertfordshire, where demand for well-presented, commuter-friendly homes is strong, energy upgrades can boost both short-term rental income and long-term capital growth.
For example:
- A two-bed terrace in Hitchin with EPC D may rent for £1,200 per month
- After upgrades and EPC C rating, rent may rise to £1,350 or more
If the improvements cost £5,000, that’s a potential yield increase of £1,800 per year – meaning a return on investment within three years.
What if my property can’t reach EPC C?
Some homes may be exempt – for example, listed buildings or those where the cost of improvements exceeds a set cap (currently £10,000). However, these exemptions must be formally registered and evidence provided.
Why local knowledge matters
Every home is different, and so is every neighbourhood. At Country Properties, we know the Hertfordshire market inside out. We’ve helped landlords upgrade Victorian terraces in Letchworth, improve 1930s semis in Hitchin, and re-market properties in Welwyn once improvements were made.
We work with trusted contractors, energy assessors and retrofit specialists to guide landlords step by step. Whether you’re managing one buy-to-let or an entire portfolio, our team can:
- Review your current EPC rating
- Recommend smart, cost-efficient upgrades
- Provide up-to-date rental valuations
- Connect you with grant support options
Book a free rental valuation today or visit our landlord services page.
Final thoughts: the time to act is now
The 2026 EPC deadline is approaching quickly, and landlords who plan ahead will be in the strongest position. Improving your Hertfordshire rental property EPC C rating not only keeps you compliant, but makes your investment more resilient, desirable and profitable.
From updating older properties with insulation and efficient heating to exploring landlord grants Hertfordshire councils may offer, there are multiple ways to prepare. The key is not to wait.
Speak to your local Country Properties team for tailored guidance and support – and let’s make your property future-ready.
