Buying Guide

Comparing an older and a newer Luxembourg apartment fairly

The two are rarely compared on the same terms, because their costs arrive at different times. Six fields put them side by side, and one of them is now a financing variable rather than a comfort one.

Field one: normalised surface

Luxembourg listings routinely mix habitable surface with terraces, balconies, cellars and parking in one headline figure. A property advertised at 110 m² including a 15 m² terrace and a 10 m² cave is an 85 m² apartment.

Normalise both before anything else, and compare habitable surface only. Older conversions frequently lose more to corridors and thick walls than a plan suggests, while newer stock is planned tightly and loses less.

Field two: energy class, which now affects lending

This is the field that has changed most. Properties classed A to C generally attract the best lending conditions. F to H typically trigger stricter analysis, with works integrated into the financing plan rather than treated as optional.

So an older apartment with a poor class is not simply colder; it is a different financing conversation. And the works that change a class frequently touch the envelope, which is a common part: improvement works require an absolute majority of all millièmes at the general assembly, present or not.

The difference in running cost between a class A new-build and an unrenovated class G building runs to several hundred euros a month over a heating season from roughly October to April. That belongs in the comparison rather than in a footnote.

Field three: the building's documented liabilities

Read the same four documents for both. The minutes of the last three general assemblies, since works voted and not yet called for are an existing liability. The reconciled charges for two completed years rather than the monthly provision. The balance and annual contribution of the fonds de travaux, compulsory in every Luxembourg co-ownership since 1 August 2023. And the level of arrears across the co-ownership.

A newer building has younger liabilities rather than absent ones. It simply has more time before the first major cycle, and the works fund reflects that.

An older building may have a well-funded reserve and a facade recently done, which is a completely different purchase from the same building with a thin fund and a study commissioned.

Field four: what the plan does

Older stock in Limpertsberg, Belair and the Gare district brings ceiling height, deep window reveals and character, along with timber floors that transmit sound between lots, mixed glazing, and frequently no lift above three floors.

Newer stock in Kirchberg, Cloche d'Or and the southern communes brings insulation, lifts, underground parking and bicycle stores, along with tighter floor planning, lower ceilings and large glazed areas that overheat in summer without external shading.

Measure rather than characterise: the longest uninterrupted wall in each room, the number of doors and their swings, the ceiling height, and the window head height against the room depth.

Field five: the thirty seconds

Stand in the main bedroom of each with the window closed and stay silent for thirty seconds. That measures transmission through the structure, which is the one property neither an owner nor a tenant can change, since the floors between lots are common parts.

It is the single most predictive difference between the two categories and it never appears in a listing. In converted stock with timber floors it is frequently the deciding factor.

Field six: total acquisition cost

Registration and transcription duties amount to 7%, being 6% plus 1%, on both. Notary emoluments are regulated and run to roughly 1% to 1.5% with VAT, plus disbursements and the mortgage deed, and these are normally excluded from financing.

The Bëllegen Akt tax credit of €40,000 per buyer and €80,000 for a couple acquiring together applies to both, provided you occupy the property as a principal residence from entry or within two years, and provided a couple acquires en indivision.

The difference appears in a VEFA purchase, where duties fall on the land share while the construction is invoiced at the housing VAT rate, with the advantage capped. That is a genuine structural difference rather than a discount.

Where the comparison usually goes wrong

Two errors recur. Comparing the purchase price without the running cost, which favours the older apartment and is wrong over a holding period. And comparing the running cost without the building's documented liabilities, which favours the newer one and ignores that every building has a cycle.

Put all six fields on one sheet for both properties and fill them the same evening. After four viewings the apartment you remember as good value will be the one with the best light.

The horizon question

Total acquisition costs commonly land between roughly 8% and 13% of the price for owner-occupiers after the credit. That friction has to be recovered in both directions.

Over a short horizon the newer apartment with predictable costs is generally the safer answer. Over a long one, an older building with a funded reserve, good bones and a cycle recently completed can be the better one. Neither is a general rule; both follow from the documents.

Three questions we are asked

Is charm worth paying for? Ceiling height and light are worth paying for and they show up in the measurements. Charm that is not in a measurement is worth less than it seems on a Sunday afternoon.

Does a lift matter that much? For resale, considerably. A fourth floor without one narrows the pool of buyers, and buyer pool determines how quickly a property sells.

Which field is most predictive? The energy class and the works fund together, because between them they tell you what the next five years will cost.

The sheet, filled the same evening

Six fields for each property, recorded before the impressions fade.

Normalised habitable surface. Energy class. The four building documents summarised in two lines. The plan measurements: longest wall per room, door count and swings, ceiling height, window head against depth. The thirty seconds of silence. And total acquisition cost calculated with your actual Bëllegen Akt position rather than a generic 7%.

Then one subjective column and only one: whether the household would be content there on a wet Sunday in November. Everything else on the sheet is a number, which is the point.

Where each wins

Older stock wins on ceiling height, deep reveals, character and frequently on location, since the converted districts sit closer to the centre. It loses on insulation, lifts, acoustic separation between lots and predictability of cost.

Newer stock wins on energy class and therefore on both running cost and lending conditions, on lifts, parking and bicycle storage, and on knowing what the next five years will cost. It loses on ceiling height, on tight floor planning, and on summer overheating where large glazed areas face south or west without external shutters.

Neither list is a recommendation. Both are checkable, and the checkable version beats the impression formed on a Sunday afternoon.

Three questions we are asked

Does the energy class really change the loan? It affects the conditions and the analysis rather than the eligibility, and F to H typically means works folded into the plan.