Are your co-ownership charges too high?

Every year, it's the same ritual. The charge statement arrives, you look at the total, and a question crosses your mind: is this normal?

In Luxembourg, nobody can answer. Unlike France, where the ARC publishes a national average each year (€45.40/m²/year in 2021), or Belgium, which has a charges observatory, Luxembourg publishes no official statistics on co-ownership charges. No average, no range, no point of comparison.

Result: you pay without knowing if it's reasonable. This article gives you the tools to answer the question yourself.

What you're actually paying for

Your charges break down into four major categories, defined by the loi modifiée du 16 mai 1975 on the status of co-ownership of built properties.

Conservation of common parts — structural repairs: roofing, facades, piping, stairwells, roadways. These are the heaviest expenses, but also the most infrequent.

Routine maintenance — the building's daily life: cleaning of common areas, boiler maintenance, elevator inspection, snow removal, green spaces, electricity for common areas, waste management, water, gas and fuel.

Administration — management fees: syndic fees, building insurance premiums, assembly convocation costs, and where applicable, concierge.

Exceptional charges — major works voted at assembly: facade renovation, roof replacement, energy upgrades.

Since August 1, 2023, a fifth line has appeared on your statement: the mandatory fonds de travaux, introduced by the law of June 30, 2022. Minimum annual contributions depend on your building's energy performance certificate: €3/m²/year for classes A+ to C, €5/m²/year for classes D and E, and €6/m²/year for classes F to I.

Many co-owners discovered this obligation on their statement without prior notice — Le Quotidien reported widespread surprise and anger among residents in autumn 2023.

Finally, there's the fonds de roulement: an advance paid when joining the co-ownership, proportional to your millièmes, covering initial running expenses (insurance, elevator, waste, supplier advances). This fund is refunded when you sell your unit.

The only benchmark that exists in Luxembourg

In the absence of official statistics, we can rely on figures published by the Groupement des Syndics Professionnels du Luxembourg (GSPL). Its 66 member firms collectively manage 7.9 million m² of surfaces and bill €291.7 million in annual charges.

Dividing these two figures gives an average of approximately €37/m²/year across all buildings managed by professional syndics in Luxembourg.

If you're well above €37/m², that doesn't necessarily mean your charges are excessive — a building with an elevator, collective gas heating and a concierge will naturally cost more than a small residence without an elevator and individual heating. But the gap deserves to be understood.

Honest caveat: this €37/m² figure is a rough calculation from aggregated public data. It's not an official statistic. Luxembourg needs a proper charges observatory — until one exists, every co-owner is navigating blind.

Why your charges keep rising

If your charges have increased in recent years, you're not alone. Several factors are compounding.

Energy remains the most volatile item. Heating oil prices doubled in a single year in late 2021. The government implemented price shields (Energiepreisbremse) that limited the increase: without them, gas would have been 34% more expensive in 2022, 60% more in 2023, and electricity 65% more in 2023-2024. These protections have been gradually lifted — full market rates are returning.

Building insurance follows an upward trend across Europe. The July 2021 floods in Luxembourg generated massive claims. In France, co-ownership insurance premiums have risen 9 to 11% per year in recent years — the trend is comparable in Luxembourg.

The mandatory fonds de travaux, effective since August 2023, adds an entirely new expense line. For poorly-rated buildings (F to I), it's a significant item.

Renovation costs continue to rise. In 2025, renovation in Luxembourg costs between €1,150 and €2,500/m² depending on scope. Successive salary indexations increase labour costs.

Syndic fees are being revalued. The GSPL is pushing for professionalization of the role, too often practised as a secondary activity in their own words. Better-trained and better-equipped syndics cost more — but normally manage better.

Not all increases are unjustified. But you have the right to understand every one of them.

What the law guarantees you

The loi modifiée du 16 mai 1975 gives you precise rights regarding charges. Knowing them changes everything.

Proportionality (article 7). Your charges must be distributed proportionally to the tantièmes (or millièmes) of your unit, determined by the composition, surface area and location of each private part. For shared equipment (elevator, collective heating), distribution can account for the utility each element provides to each unit — a ground-floor apartment shouldn't pay as much for the elevator as a 6th-floor apartment.

Unanimity to change distribution (article 8). Modifying the charge distribution key requires unanimity of all co-owners. Exception: when works are voted by majority at assembly, the resulting charge redistribution can be decided at the same majority.

Right to access supporting documents (article 23). You have the right to examine all documents at the syndic's office: invoices, contracts, correspondence, registers. This right is absolute. If the syndic refuses or delays for months, that's a red flag.

The conseil syndical has extensive oversight powers: it can verify the syndic's accounts, expense distribution, and contract conditions. Its members can consult and copy all documents at the syndic's office after notification. If your building doesn't have a conseil syndical, elect one at the next assembly — it's the most powerful control lever available to co-owners.

Provisions are not at the syndic's discretion. Only the general assembly can set the amount of monthly advances. Any unilateral increase by the syndic is illegal and unenforceable. For urgent works, the syndic can request up to one third of the estimated cost without prior vote — but must report on it.

What you can concretely do

If your charges seem excessive, here's a structured approach.

Step 1: Read your statement properly. The statement compares your provisions paid (monthly advances) against actual expenses. This results in either an overpayment (the syndic owes you money) or an additional amount due. Check each line item: the total is often less revealing than individual lines. A cleaning line that doubles year-over-year deserves an explanation.

Step 2: Request supporting documents. It's your legal right. Ask for invoices on items that concern you. Compare billed amounts to statement amounts. Verify that contracts (cleaning, elevator, insurance) have been competitively tendered recently. A contract tacitly renewed for ten years isn't necessarily at the best price.

Step 3: Benchmark your syndic fees. In Luxembourg, professional syndic fees range from €8 to €40 per unit per month depending on building size and complexity. If you're at the high end, get competing quotes. But note: the cheapest syndic isn't necessarily the most economical — a syndic who negotiates building contracts well can save you far more than the fee difference.

Step 4: Activate your conseil syndical. A functioning conseil syndical — one that reviews accounts, negotiates contract renewals, compares work quotes — is the most effective mechanism for containing charges. It's not a decorative role. It's a legally mandated oversight function with full access to syndic documents.

Step 5: Put it on the AG agenda. If you've identified items to review, ask the syndic to add them to the next general assembly agenda. Insurance renegotiation, energy audit, competitive tendering of the cleaning contract — the AG decides, not the syndic. If the syndic refuses to include your items, 20% of millièmes is enough to demand an extraordinary assembly.

Step 6: As a last resort, legal action. You can contest an assembly decision before the tribunal d'arrondissement within 2 months of the minutes being notified. Only co-owners who voted against or were absent can act. For procedural defects, the prescription period is 10 years.

To change syndic, you need an absolute majority (more than 500/1000 millièmes). If this majority isn't reached but a third of votes were obtained, a second vote by simple majority can take place immediately. In cases of serious misconduct, the juge de paix can order revocation and appoint a provisional administrator.

The real problem: oversight once a year

All the steps above assume you examine your charges. But the reality is that most co-owners only open their statement once a year — when it's already too late. Twelve months of spending have already happened. Contracts have been renewed. Invoices have been paid.

A conseil syndical that meets twice a year can hardly detect a cleaning contract 40% above market or an insurance premium renewed without negotiation. The problem isn't a lack of rights — the 1975 law is clear. The problem is a lack of day-to-day visibility.

This is where digitisation of co-ownership management changes the game. When every co-owner can view their building's finances in real time — spending as it happens, period-over-period comparisons, the detail of every invoice — the syndic works under permanent oversight. Not hostile oversight, but informed oversight. Anomalies are spotted when they occur, not twelve months later. Contracts are compared before renewal, not after.

Opacity is not inevitable. It's a tooling problem. And the tools now exist.

Useful resources

Loi modifiée du 16 mai 1975 (consolidated text) • Règlement grand-ducal du 13 juin 1975 (implementing measures) • GSPL (professional syndic directory) • Klima-Agence (financial aid for energy renovation) • Fonds de travaux rates by energy class • ULC (consumer protection)