Planning a renovation? It’s the perfect time to not only improve your home’s look but also make it more energy efficient. The changes that save energy might not be as eye-catching as a new kitchen island, but they pay off every month on your bills.
Here’s how to make the most of your renovation and boost your home’s efficiency.
Focus on the Basics First
Before splurging on designer lighting or underfloor heating, deal with the invisible culprits that let heat and money escape from your home.
Insulation If your home isn’t properly insulated, you’re essentially heating the outdoors. During your renovation, it’s far easier and cheaper to add insulation in key areas:
- Filling uninsulated cavity walls can cut heat loss by up to a third.
- Internal wall insulation is ideal for solid walls to reduce escaping heat.
- Roof or loft insulation prevents hot air from rising out of your home. Aim for at least 270mm of mineral wool.
- If you’re pulling up floorboards or relaying concrete, adding floor insulation will keep your home warmer.
Windows and Doors
Upgrade to Energy-Efficient Glazing Single glazing isn’t the best at keeping heat in. If replacing windows, go for double or triple-glazed units with low-emissivity (low-E) glass. Look for a good Window Energy Rating (A-rated or better). Secondary glazing is a cheaper option for period homes with good frames.
Seal the Gaps Proper draught-proofing for doors and windows can make a big difference. Install weatherstripping or use sealant to fill any gaps.
Heating and Hot Water
Consider a Boiler Upgrade If your boiler is over 10 years old, it’s probably inefficient. Switching to an A-rated condensing boiler or a heat pump can reduce your energy use significantly. Renovations are the perfect time to upgrade if walls or plumbing are already open.
Add Smart Controls Smart thermostats, radiator valves, and zoning systems let you heat only the rooms you’re using, saving hundreds on your annual bills. Many systems can be controlled from your phone, so you never waste energy while away from home.
Lighting and Electricals
Switch to LED Lighting LEDs use up to 90% less energy than halogen bulbs and last longer. During renovations, it’s an easy upgrade for all fixtures.
Choose Energy-Efficient Appliances When installing a new kitchen, pick appliances with high energy ratings (A or above). Integrated models may look sleek, but always check efficiency. Proper ventilation also helps fridges and freezers run less hard.
Consider Renewable Options
Solar Panels If your roof is being worked on, consider adding solar PV panels. Pair them with battery storage to maximize savings.
Heat Pumps Replacing a gas boiler with a heat pump is a bigger job, but if your renovation involves replumbing or rewiring, it may be the ideal time to make the switch.
Keep Your Home Well-Ventilated
Making your home more airtight is great for energy savings, but you’ll need proper ventilation to avoid damp and condensation. Mechanical ventilation with heat recovery (MVHR) systems can help you breathe fresher air without losing heat.
Energy Efficiency Pays Off
Renovating with energy efficiency in mind lowers bills, increases property value, makes your home more comfortable year-round, and reduces your carbon footprint. Even small upgrades now save money and disruption later.
Don’t Forget
Looking to cut your energy bills? You can apply for a free home battery or see other funding options.
People Also Asked
£50,000 can cover basic updates like painting, flooring, a standard kitchen, and a modest bathroom. Smaller homes can often be fully renovated within this budget, while larger properties or projects with structural changes, high-end finishes, or energy upgrades may require more.
Upgrading insulation, installing double or triple-glazed windows, and replacing old boilers with air source heat pumps are among the most impactful improvements. These upgrades can significantly reduce energy bills and improve comfort.
Yes, there are several government schemes available. For example, the Boiler Upgrade Scheme offers grants of up to £7,500 for heat pumps, and the Warm Homes: Local Grant provides funding for energy-saving improvements for eligible low-income households in England. ECO4 runs until 31 December 2026, and the Great British Insulation Scheme (GBIS) closed on 31 March 2026. You can see the current home-energy grants on our website.
If your boiler is over 10 years old or inefficient, it’s advisable to replace it. Modern heating systems like air source heat pumps are more energy-efficient and can lower long-term energy costs.
Enhancing insulation, upgrading heating systems, and installing energy-efficient windows can improve your EPC rating. A higher rating not only reduces energy bills but can also increase your property’s market value.
Yes, if your roof is being replaced or upgraded, it’s an opportune time to install solar panels. They can generate clean electricity, reduce energy bills, and increase your home’s energy efficiency.
Underfloor heating provides even heat distribution and can be more energy-efficient than traditional radiators. It’s particularly effective in open-plan spaces and can be combined with renewable energy sources like heat pumps.
Yes, schemes like the Warm Homes: Local Grant offer funding for insulation improvements. ECO4 can also fund insulation until it ends on 31 December 2026; the Great British Insulation Scheme closed on 31 March 2026. These grants can help reduce the upfront costs of making your home more energy-efficient. You can see the current home-energy grants on our website.
Use eco-friendly materials, consider water-saving fixtures, and incorporate renewable energy sources like solar panels or heat pumps. Sustainable renovations not only benefit the environment but can also lead to long-term savings.
You should obtain a new EPC after completing significant renovations that affect your home’s energy performance. An updated EPC reflects the improvements made and can be beneficial if you’re selling or renting the property.