Why renovate your house in Luxembourg in 2026?

Luxembourg’s housing stock is ageing: the majority of single-family homes were built between the 1950s and 1980s, at a time when energy and comfort standards were radically different from today’s norms. These properties typically have poorly or uninsulated walls, ageing single or double glazing, end-of-life fuel oil or gas heating systems, and electrical installations often ill-suited to contemporary uses.

In this context, renovation is no longer just an aesthetic matter — it is a strategic investment on several fronts.

Asset value enhancement. A well-executed renovation increases your property’s value by 5% to 20% on the Luxembourg real estate market, where the price per habitable square metre remains among the highest in Europe. Every euro invested in a modern kitchen, a refurbished bathroom or better energy performance translates directly into resale value.

Reduction of energy costs. A serious energy renovation can reduce your heating bills by 50% to 80%. Over time, the savings achieved contribute to recouping the investment in 8 to 12 years on average — a payback accelerated by state subsidies.

Improvement of comfort and healthiness. Damp, mould, thermal bridges, draughts, noise… Problems affecting a significant portion of Luxembourg’s older housing stock that degrade everyday quality of life. Renovation addresses them structurally.

Unprecedented subsidies in 2026. The new Klimabonus scheme that came into force on 1 January 2026 has simplified procedures and increased amounts. Combined with the 3% VAT and Enoprimes premiums, the Luxembourg State can cover a very significant portion of the energy component of your works.

The 4 types of house renovation in Luxembourg

House renovation is not a uniform reality. Depending on the condition of the property, your objectives and budget, four major categories of works can be distinguished, each with its own challenges and cost levels.

1. Light renovation (refresh)

This involves surface works, without intervention on the structure or technical equipment. Painting, floor coverings, bathroom fixture replacement, new tiling, lighting update… This type of renovation is suited to homes whose structure is sound but which show their age visually. The budget is contained (€250 to €750/m²) and timelines are short — a few weeks for a standard house.

Concrete example: a 1980s house in Strassen, 120 m², full refresh (paint, parquet, bathroom). Estimated budget: €26,000 to €36,000.

2. Partial renovation

This concerns one or more specific items: full renovation of kitchen and bathroom, window replacement, electrical compliance upgrade, installation of a new heating system. Intervention on technical elements without touching the load-bearing structure. This is often the most common renovation type in Luxembourg, where owners proceed item by item over time. Budget: €750 to €1,250/m².

3. Full renovation (major works)

Full renovation covers all trades: structural works, insulation, heating, plumbing, electrical, joinery and finishes. It is often necessary for homes dating from before 1970 or for properties purchased in a degraded state. An architect or project manager becomes almost indispensable here to coordinate the parties and guarantee project coherence. Budget: €1,150 to €2,500/m².

Concrete example: a 150 m² 1960s house in Bertrange, full renovation with insulation, new windows, heat pump, rewiring, new bathroom and kitchen. Total budget: €200,000 to €320,000, a significant portion of which is eligible for Klimabonus subsidies.

4. Rehabilitation (ruin or very degraded state)

This applies to old village houses, farmhouses or abandoned properties. Rehabilitation works often exceed €1,800/m² and can reach €2,500/m² for the most complex projects. An OAI architect is systematically required for the building permit application.

Renovating a 1960s, 70s or 80s house in Luxembourg

As of August 2026 in Luxembourg, more than 50% of single-family houses date from before 1970 (STATEC) — thus before the first thermal regulation of 1974. Unrenovated, they sit in energy classes G-H (1960s), F-H (1970s) or E-G (1980s), with heat losses concentrated in the roof (30%) and walls (25%).

Before any works, an asbestos survey is mandatory (Grand-Ducal regulation of 4 July 2007, €300–600) for buildings built before 2001. With aid, the bill melts: for a 130 m² house built in 1972 (moving from class G to B), €95,300 of gross works comes down to around €41,334 net, thanks to €47,400 of Klimabonus and €6,566 saved through the 3% VAT. The payoff shows in the property’s value: a house rated A-B-C sells on average 9.9% higher than a D-E-F, and 38.3% more than a low-efficiency property (STATEC).

Calculate your Klimabonus aid with our renovation simulator.

House renovation prices in Luxembourg in 2026

Renovation costs in Luxembourg are structurally higher than in neighbouring countries, due to higher labour costs and a construction market under pressure. According to STATEC data, residential construction prices rose by +1.5% year-on-year between April 2024 and April 2025, after a sharp post-Covid and post-Ukraine surge. The roofing and insulation sector has been the most impacted since 2020.

Sources: data collected by Renov.lu from certified partner tradespeople — 2026. Indicative ranges, 3% VAT included for labour (main residence over 10 years old).

Factors influencing the price

• Location. Renovating in Luxembourg City or in first-ring municipalities (Strassen, Bertrange, Niederanven, Hesperange) involves a surcharge linked to access difficulties, parking and tradesperson logistics costs.
• Initial condition of the property. A home with damp problems, asbestos, or ageing structures requires preparatory works not foreseen in the initial budget. Always plan a 10 to 15% contingency reserve.
• Desired finish level. Premium materials (solid parquet, imported tiles, high-end kitchen equipment) can double the cost of finishes compared to mid-range.
• Season and timelines. Luxembourg tradespeople are in high demand. A project planned in peak season (spring–summer) or with short timelines may be invoiced at a premium. Plan your project at least 4 to 6 months in advance.
• Use of an architect or project manager. For a full renovation, their fees generally represent 12 to 14% of the total works amount — a cost often largely offset by savings on coordination and tradesperson selection.

House renovation works item by item

A house renovation generally mobilises several trades in parallel or in sequence. Here are the main works items with their price ranges in Luxembourg in 2026.

Thermal insulation

This is the most profitable and most subsidised project. The roof accounts for 25 to 30% of heat loss in an uninsulated home, external walls between 15 and 25%. Prioritising these two items is the most effective lever to improve the energy passport. Allow €60 to €115/m² for external wall insulation depending on the chosen material (standard or ecological), €25 to €50/m² for loft flooring, and €70 to €120/m² for a full roof. These costs are largely eligible for Klimabonus 2026.

Window and door replacement

The switch from double to triple glazing is a priority in homes from the 1970s–1990s. The cost ranges from €800 to €2,000 per installed window in Luxembourg, depending on size, material (PVC, aluminium, wood) and glazing type. Insulated entrance doors are invoiced between €2,500 and €5,000 including installation. A Klimabonus subsidy of €70/m² of replaced glazing area is available.

Heating system

Replacing a fuel oil or gas boiler with an air/water heat pump costs between €16,000 and €24,000 including installation. A geothermal pump involves an investment of €30,000 to €40,000. These installations benefit from the largest Klimabonus subsidies (up to €12,000 for an air/water HP, more for geothermal), complemented by Enoprimes premiums and municipal subsidies.

Kitchen renovation

The kitchen is often the most expensive room to renovate. Allow between €10,000 and €30,000 for a fully equipped and newly renovated kitchen, depending on size and finish level. This item includes custom joinery, built-in appliances, plumbing, electrical and tiling. The kitchen is also one of the elements that most enhances a property’s resale value.

Bathroom renovation

A bathroom renovated from scratch generally costs between €8,000 and €20,000 in Luxembourg. Walk-in showers, large-format tiles and wall-hung vanity units are the dominant trends in 2026. Do not underestimate waterproofing works (under-tile waterproofing, damp treatment): they represent an invisible but crucial item.

Electrical renovation

Completely rewiring a 120 to 150 m² house costs between €8,000 and €18,000. This item is often mandatory in pre-1980 homes, whose installations no longer comply with current standards (RCDs, earth connections, distribution board). Never neglect this item: electrical compliance is a fundamental safety requirement.

Plumbing and networks

Complete plumbing replacement (risers, water supply, waste pipes) of a 150 m² house is invoiced between €10,000 and €20,000. This often invisible project is essential in 1950s–1970s homes still fitted with lead or galvanised steel pipes.

Roof

Complete roof renovation represents an investment of €150 to €350/m² depending on area, pitch, materials (slate, tile, zinc) and accessibility. This is the item whose prices have risen most in Luxembourg since 2020: +45.5% between 2020 and April 2025 according to STATEC data, driven by increases in timber and insulation materials.

Extension and enlargement

When renovation is no longer sufficient, an extension is often considered. Allow €1,800 to €2,500/m² for a timber frame extension, €1,900 to €3,000/m² in masonry, and €2,000 to €3,500/m² for a steel or glass extension. These prices remain well below the price per habitable m² on the Luxembourg real estate market (€8,000 to €12,000/m²), making these investments very profitable.

Subsidies and grants for house renovation in Luxembourg in 2026

Luxembourg has one of the most generous renovation subsidy systems in Europe. For the energy component of your project, several schemes are cumulative.

The Klimabonus Wunnen (main subsidy)

The Klimabonus is the Luxembourg State’s flagship energy renovation programme. Since 1 January 2026, the scheme has been entirely revamped: amounts are now fixed flat rates in €/m², procedures have been simplified and amounts increased. This programme can finance up to 62.5% of eligible energy works costs.

Covered works include external wall insulation, roof insulation, ground floor insulation, window replacement, controlled ventilation installation, heat pump, solar thermal or photovoltaic panels, and wood or pellet boiler. For ecological insulation materials (bio-based, recycled), subsidy supplements apply — up to €45/m² additional.

Main condition: the dwelling must be over 10 years old. For projects involving more than one element, an energy advisory by an accredited advisor is mandatory before works begin — and itself subsidised at up to €1,500.

The 3% VAT

For renovation works on a main residence dwelling over 10 years old, the super-reduced 3% VAT rate applies instead of the normal 17% rate. This represents 14 points of savings on labour and materials, within the limit of a €50,000 tax benefit per dwelling. On a €300,000 project, the saving can reach €30,000 to €40,000.

Enoprimes premiums

Enovos and Creos, Luxembourg’s two main energy suppliers, offer complementary premiums for insulation, ventilation and renewable energy equipment works. These premiums are cumulative with the Klimabonus and 3% VAT. They are accessible via enoprimes.lu.

Municipal subsidies

Some Luxembourg municipalities offer complementary subsidies for energy renovation works, generally between €1,500 and €3,000 depending on the municipality and project. Not all municipalities offer them. Enquire directly with your municipal administration before launching works.

The Klimabonus social top-up

Lower-income households can benefit from a doubling of the Klimabonus through the social top-up, granted by the Ministry of Housing. This complementary subsidy aims to protect the most vulnerable households against energy poverty. Its amount depends on household income.

The climate loan (Klimaprêt)

To finance the portion not covered by subsidies, approved banks (BGL, BCEE, BIL…) offer the climate loan — a preferential rate loan for dwellings over 10 years old. The State subsidises an interest rate of 1.5%, up to 10% of the borrowed capital, on a maximum amount of €100,000 over 15 years.

Administrative procedures for renovating a house in Luxembourg

Before starting any project, it is essential to verify the administrative obligations that apply to your works. In Luxembourg, rules vary by municipality, nature of works and area involved.

When is a building permit required?

A building authorisation (or building permit) is mandatory for all works of construction, transformation, demolition or structural modification of a building. This includes: roof modification, removal of load-bearing walls, creation of an extension, enlargement of a window or facade modification. The application must be submitted to the mayor of the relevant municipality before works begin.

Smaller-scale works — interior renovation not affecting load-bearing structures, floor covering installation, bathroom fixture replacement — generally do not require formal authorisation. But each municipality sets its own rules: always enquire before starting.

The role of the architect

For projects requiring a building permit, an architect member of the OAI (Order of Architects and Consulting Engineers) is generally required to prepare the plans. Their involvement is not mandatory for interior renovations not affecting structures. For a full renovation, an architect’s fees (full mission) represent 12 to 14% of the total works amount.

Timelines and permit validity

The building permit automatically lapses if works do not start within 2 years of being granted. A one-year extension may be granted on written and justified request. Once works are completed, a completion declaration must be submitted to the municipality for final compliance inspection.

Protected zones and conservation areas

If your home is in a protected or listed area, particular conditions apply to facades and roofs. In some cases, Luxembourg City can subsidise part of the previously authorised works. Enquire with your municipality’s Urban Planning Service.

Steps to a successful house renovation in Luxembourg

A successful renovation project is prepared upstream. Here is the recommended method, from the first idea to site handover.

5 mistakes to avoid during your house renovation

1. Starting works before the Klimabonus agreement in principle

This is the most frequent and most costly mistake. Without prior approval from the Environment Administration, you lose all rights to Klimabonus subsidies — regardless of your works amount. The application is made online on MyGuichet.lu and must imperatively precede the start of works.

2. Not allowing a contingency for unexpected costs

In an older home, surprises are virtually certain: concealed insulation made of degraded glass wool, older-than-expected plumbing, damp traces behind a wall. Always plan a 10 to 15% budget reserve, and do not integrate it into your main financing plan.

3. Choosing the lowest bidder without verifying qualifications

A low price can signal an unregistered tradesperson, uncontrolled subcontracting or non-compliant materials. For Klimabonus-eligible works, the tradesperson must be approved. Always verify references, insurance and professional registration before signing.

4. Carrying out works in the wrong order

The order of works in a full renovation matters. Insulation must imperatively be addressed before installing the new heating system (an oversized heat pump in a poorly insulated home uses far too much energy). Similarly, electrical and plumbing works must be done before finishes. Incorrect sequencing can generate very costly remedial works.

5. Neglecting the energy passport before selling or renting

In Luxembourg, the Energy Performance Certificate (EPC or Energiepass) is mandatory for any sale or rental. A property rated G or F sells or rents with more difficulty and at a lower price. A renovation aimed at improving by at least two energy classes can radically transform the value and commercial attractiveness of your property.

Frequently asked questions about house renovation in Luxembourg