Renovating a property with character, such as a manor house or an old farmhouse, is an exciting but demanding project. Whilst the charm of older properties is undeniable, it often comes with thermal challenges and higher energy bills. Nowadays, incorporating sustainable solutions into a centuries-old building is not only possible but essential to ensure that this heritage is passed on to future generations.
Energy-efficient renovation in Belgium: how can you incorporate renewable energy into your older property?
Why modernise an older property using renewable energy?
Reduce your bills and your energy dependence in the long term
The primary benefit of an energy-efficiency refurbishment is financial. By replacing an old oil or gas boiler with an energy-efficient heating system and generating your own electricity, you can drastically reduce your energy consumption. You’ll have better control over your costs in the long term and gain greater independence from fluctuations in energy prices.
Enhance the value of your property and improve your comfort
A well-insulated property, fitted with a modern heating system, offers greater comfort: consistent warmth in winter and a cool, comfortable environment in summer. As well as improving your wellbeing, these improvements significantly increase the market value of your property.
An expert’s view: As specialists in character properties, we have observed that a high-performing EPC rating has become a decisive selling point in the current Belgian housing market.
Planning ahead for legal requirements (EPC)
In Belgium, legislation is tightening energy performance requirements. When purchasing a property with a low energy rating (E, F or G), renovation work is now often compulsory and must be carried out within strict timeframes. Planning for these changes in advance will help maximise the value of your investment in the long term.
Planning your renovation project: the essential steps to take before the work begins
A successful energy-efficiency refurbishment – particularly in older buildings – cannot be improvised. Every wall and every roof structure has its own physical characteristics.
Before carrying out any work, it is essential to have an energy audit carried out by an accredited professional (PAE audit in Wallonia). This comprehensive assessment identifies your home’s weaknesses (heat loss, inadequate insulation, an outdated heating system) and proposes a costed and prioritised action plan.
The cost of an energy-efficiency renovation can be substantial. It is essential to draw up a detailed budget, taking into account the cost of materials, labour and any architect’s fees. You should also find out about the grants and financial assistance offered by the Regions (Wallonia, Brussels, Flanders), which can significantly reduce your outlay.
For many renovation projects, particularly those that alter the external appearance of the façade or the structure of the building, a planning permission is required. This is often the case when replacing window frames, installing external wall insulation or fitting solar panels on castles or historic properties for sale in Belgium. Check with your local council before starting any work.
Insulation: the essential prerequisite for better energy efficiency
Before generating green energy, we must ensure that we do not waste it. Insulation is the cornerstone of any energy-efficiency refurbishment of an older property.
The roof: responsible for 30 per cent of heat loss, it is the most cost-effective investment.
Window frames: for large, exceptional properties, windows must be replaced whilst strictly adhering to the architectural style, using high-performance double glazing fitted to bespoke wooden frames.
Ventilation: an older building needs to ‘breathe’. High-performance insulation must be combined with a ventilation system (CMV) to prevent any problems with damp or condensation.
Which renewable energy solutions should you choose for your older property?
Once the building envelope has been optimised, you can choose the most suitable energy generation system.
The Heat Pump (HP): the go-to solution, it can often be connected to your existing radiators (if they are correctly sized) or to underfloor heating. It drastically reduces your reliance on fossil fuels.
Photovoltaic solar panels: on protected roofs, there are now solar tiles or very thin ‘full black’ panels that blend in seamlessly without detracting from the building’s appearance.
The thermodynamic water heater: a simple and efficient solution for producing your domestic hot water by using heat from the ambient air.
Frequently asked questions about energy-efficient refurbishment of older buildings
No, not necessarily. First, you need to check the strength of the roof structure to ensure it can support the weight of the panels. Next, it is essential to check your local planning regulations, as restrictions may apply, particularly if your house is a listed building or situated within a conservation area.
The key is to choose materials and techniques that respect the spirit of the building. If external insulation is not possible in order to preserve the façade, priority should be given to internal insulation using breathable materials (lime-hemp, wood wool) that respect the natural moisture management of old walls. For the windows, opt for bespoke wooden frames that replicate the original style. Guidance from specialist professionals is essential. Comptoir Foncier’s expertise in the field of luxury properties ensures an approach that respects your heritage.
Each Region (Wallonia, Brussels and Flanders) offers a range of grants (‘Habitation grants’, ‘RENOLUTION grants’, ‘Mijn VerbouwPremie’) to support energy-efficiency renovations. This financial assistance covers energy audits, insulation, heating system replacement, the installation of solar panels, etc. The amounts vary depending on your income and the nature of the work.
An architect must be involved whenever the works require planning permission. This applies to alterations to the load-bearing structure or the external appearance of your home. Even if it is not compulsory, an architect’s expertise is invaluable in ensuring the consistency and technical quality of a large-scale project.
If you have any questions about increasing the value of your property following a renovation, please do not hesitate to seek advice from our experts.