Improving your Energy Performance Certificate (EPC) rating doesn’t always require major renovations. Sometimes, small, targeted changes can deliver a noticeable boost to your energy efficiency score, reduce energy bills, and make your home more attractive to buyers or tenants.

Our experienced EPC Assessors in London regularly identify quick wins that homeowners overlook:
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1. Upgrade Fixed Lighting to Energy-Efficient Bulbs

Lighting is one of the easiest areas to improve. EPC assessments consider fixed lighting, so switching to LED or low-energy bulbs can make a measurable difference.

Quick tips:

  • Focus on main living spaces, kitchens, bathrooms, and hallways

  • Replace any halogen or incandescent bulbs with energy-efficient LEDs

2. Draught-Proof Doors and Windows

Air leakage causes heat loss, which reduces your EPC score. Addressing draughts is a fast, low-cost solution.

Quick fixes include:

  • Sealing gaps around doors with door sweeps or seals

  • Draught-proofing windows with self-adhesive strips

  • Covering letterboxes and keyholes with brushes or flaps

Benefit: This improves both comfort and fabric efficiency points.

3. Optimise Heating Controls

Even efficient boilers can underperform without proper control systems.

Upgrades that deliver quick EPC gains:

  • Programmable room thermostats

  • Thermostatic Radiator Valves (TRVs)

  • Smart heating controls to schedule rooms individually

These simple changes reduce wasted energy and are highly valued in EPC calculations.

4. Insulate Hot Water Cylinders and Pipes

Heat loss from hot water systems can reduce EPC points.

Quick measures:

  • Fit an insulation jacket around your hot water cylinder

  • Insulate exposed hot water pipes

  • Check the cylinder thermostat is set correctly

Result: Lower heat loss, higher EPC efficiency, and reduced energy bills.

5. Minor Behavioural Adjustments

While EPCs primarily focus on property features, well-maintained systems perform better.

  • Set thermostats to recommended temperatures

  • Only heat occupied rooms

  • Service boilers and heating systems regularly

These habits ensure your improvements are reflected during assessment.

6. The Benefits of Small EPC Boosters

  • Cost-effective: Low investment, high impact

  • Quick results: Can often be implemented in a day or weekend

  • Higher EPC rating: Helps meet compliance requirements for sales or rentals

  • Energy savings: Reduced bills immediately

  • Property appeal: More attractive to tenants and buyers

7. When to Book an EPC Assessment

After making improvements:

  1. Gather any relevant documentation

  2. Ensure all systems and upgrades are visible to the assessor

  3. Book a re-assessment to capture the improved rating

👉 Schedule your EPC assessment today:
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Key Takeaways

  • Small, strategic improvements can yield significant EPC gains

  • Focus on lighting, draught-proofing, heating controls, insulation, and behaviour

  • Document all work for assessors to ensure points are credited

  • Quick boosters improve efficiency, comfort, and property value

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