Complete checklist before buying in Luxembourg: the 25 checks you should never skip

Published on July 20, 2026 and written by Cyril Jarnias

Committing to a real estate purchase in Luxembourg often means signing for the most expensive project of your life. Between high per‑square‑meter prices, specific tax rules, condominium regulations, energy constraints, and hidden risks in older buildings, a mistake can be very costly.

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Laying the groundwork: budget, financing, and real costs

Buying in Luxembourg does not start with browsing listings, but with calculations and discussions with the bank. Even before talking about a preliminary agreement, you need to understand how far you can go… and at what overall price.

1. Check your borrowing capacity and get a pre‑approval

The vast majority of buyers start with a meeting at a bank or with a broker. Luxembourg institutions generally work with a monthly payment that should not exceed 30 to 40% of the household’s net income, 35% being a common target for a “clean” application.

A pre‑approval tells you the maximum amount you can borrow and reassures the seller of your seriousness. It is strongly advised not to sign a preliminary agreement without this pre‑approval.

2. Calculate your down payment precisely and understand LTV rules

Luxembourg regulations impose loan‑to‑value (LTV) caps that banks apply:

For a standard purchase, you generally need a personal contribution of about 20% of the price, plus notary and registration fees, which in most cases cannot be financed. First‑time buyers who will occupy the property may, with an excellent file, obtain 100% financing of the price (excluding fees), but this remains the exception.

3. Include all ancillary costs: notary, taxes, mortgage, renovation

A classic mistake is to look only at the listing price without factoring in transaction costs and repair costs.

The main items are as follows:

Overall, for an older apartment purchased at €500,000 by a first‑time buyer couple, typical calculations from the texts give:

The Bëllegen Akt is therefore a major lever: for a primary residence occupied by the buyer, each buyer can offset up to €40,000 of duties (total cap of €20,000 in some older descriptions, raised to €40,000 in recent texts), with a minimum of €100 in duties still due.

It is important to clearly distinguish what goes to the State Treasury (duties of 6+1%, VAT), the disbursements (searches, cadastral extract, publications), and the actual notary’s compensation, which in reality represents only about 1% of the price.

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Legal framework and security of property title

The legal security of your purchase is based on the Luxembourg Civil Code, special laws (notably the law of 16 May 1975 on condominium ownership) and the work of the notary. But in practice, it is in your interest to understand what is happening behind the scenes.

4. Verify the property title and registered charges

Even before signing a preliminary agreement, certain documents should be requested and/or checked:

– Cadastral extract / land register extract from the Administration du cadastre et de la topographie (ACT)

– Mortgage certificate from the Conservation des hypothèques

– Search of the land register and the judgments register (AED and RCS)

These documents allow you to check: verification

Case law and practitioners recommend going back at least 10 to 15 years, or even 30 years, in the chain of title to catch irregular transfers, inheritance disputes, or poorly resolved co‑ownership situations. Any discrepancy between the seller’s identity and the registered title holder or any judicial annotation should raise a red flag.

5. Use cadastre resources and Geoportail

The ACT records for each parcel: nature (built or not), owner, history, surface area, official measurements. Via the national Geoportail, you can:

– Locate a parcel by address or cadastral number;

– View boundaries, existing buildings, zoning, and sometimes additional information (risks, development plan, etc.);

– Request a free cadastral extract in PDF by email (one per day).

6. Ensure urban planning compliance and the absence of “illegal” work

A frequently underestimated point: the property must have been built and modified with the appropriate municipal permits. The typical sale procedure includes:

– Check the municipality’s General Development Plan (PAG): what use (residential, office, commercial) is allowed on the parcel?

– If applicable, check a Specific Development Plan (PAP) if the area is subject to more detailed rules (residential complex, subdivision, mixed zone…).

– Review the history of building permits and authorizations: extensions, renovations, annexes, pool, garage, veranda, change of use.

A house extension, attic conversion, or rental studio may physically exist without legally existing. In that case, the buyer faces restoration orders, fines, and even the inability to value those areas upon resale.

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Technical risks, energy, and building pathologies

With high prices, many buyers turn to older properties to get “a good deal”. But a house or building from the 50s–80s can hide upgrade costs that turn the project into a financial black hole.

7. Seriously analyze the technical condition of the building

Beyond the emotional appeal, certain points should always be reviewed, ideally with a building expert:

– Structure (load‑bearing walls, foundations, cracks)

– Roof (waterproofing, framework, insulation, renovation date)

– Humidity (basement, buried walls, thermal bridges, mold)

– Electrical installation (grounding, outdated panel, safety in wet rooms)

– Heating (age of boiler, energy type, chimney and duct compliance)

– Ventilation (HRV/ERV, vents, risks of condensation and mold)

– Windows (installation year, single or double glazing, air tightness)

8. Identify specific risks in older properties: asbestos, lead, installations

Buildings constructed between the 1950s and 1980s are at risk for asbestos. Even if a diagnosis is not systematically required for the sale of housing, it is strongly advised:

– A complete survey (“asbestos survey”, “asbestos abatement”) typically costs €1,500 to €2,000;

– Treatment and disposal can cost much more, depending on the scope (simple pipe lagging vs. panels, sprayed coatings, floor tiles…);

– Inhaling asbestos fibers is linked to cancers and serious lung diseases.

Other points of caution in older buildings:

– Lead in old paints: sanding produces toxic dust;

– Old lead or steel pipes;

– Old oil‑fired boilers with risk of soil leakage;

– Lack of insulation or insulation unsuited to the humid climate.

For a house built before 1990, ask the seller for an asbestos survey, check the dates of installation revisions, examine basements and technical areas, and budget a significant renovation margin.

9. Study the EPC/Energy Pass and anticipate energy renovations

The Energy Performance Certificate (EPC) is mandatory:

The EPC classifies the building from A+ to I based on several criteria: overall energy performance, thermal insulation, CO₂ emissions. Older houses are very often rated F or G, which indicates:

– Higher heating bills;

– Likely mandatory energy renovation in the medium term (roof, facades, windows, technical systems), especially regarding NZEB requirements for new construction.

Condominiums with more than 5 units must also have a mandatory reserve fund for major work (facade, roof, elevator, energy compliance). The general meeting (GM) sets the contribution, often between 5 and 10% of the annual budget, sometimes 15% for older, poorly insulated buildings.

Always request:

– The complete EPC (not just the letter grade);

– Actual heating and electricity consumption records for the last 3 years;

– Information on the reserve fund: current level, planned work, calls for funds.

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Condominium specifics: fees, management, living rules

Buying an apartment in Luxembourg automatically means entering a condominium regime, governed by the law of 16 May 1975 as amended. Understanding this mechanism is essential before deciding.

10. Read the condominium regulations and the co‑ownership shares

Any building divided into units must have a condominium regulation, published in the land register and binding on all co‑owners, including subsequent buyers. This document determines:

– The purpose of private areas (residential, office, professional practice, etc.) and common areas;

– Rules of enjoyment (noise, pets, work, use of balconies, antennas, etc.);

– The co‑ownership shares (tantièmes) of each unit, i.e., the share in the common areas;

– The allocation keys for expenses (general, elevator, collective heating, water…).

11. Examine fees and the reserve fund

Condominium fees cover:

– Current charges: maintenance, cleaning, common area lighting, building insurance, management fees, energy for common areas, etc.;

– Special charges: elevator (distributed among served floors), collective heating (pro rata of surface area or consumption if meters), water;

– Contributions to the reserve fund for major work.

It is essential to request:

– The accounts for the last 2 to 3 fiscal years;

– The amount of quarterly fee calls;

– The balance of the reserve fund;

– The possible existence of outstanding fees from the seller (the condominium has a first‑rank privilege on the unit for the last two years of fees).

A poorly maintained building with insufficient reserves and major work ahead (facade, roof, heating, compliance) can quickly generate massive calls for funds.

12. Understand the role of the management company and how general meetings work

In any condominium, even a small one, the governance structure is based at minimum on:

The management company is the legal representative of the co‑owners’ association. The general meeting is the sovereign body that votes on budgets, work, and the appointment or dismissal of the management company. If applicable, a supervisory board – strongly recommended for more than 10 units – assists and monitors the management company.

Condominium governance

A few key points:

– A professional management company is mandatory for more than 5 units; below that, a co‑owner can act as a volunteer manager;

– The ordinary GM must be held at least once a year, convened by registered letter at least 21 days in advance, with agenda, draft budgets, and supporting documents;

– Votes are based on co‑ownership shares, with different majority requirements depending on the gravity of the decision (simple, absolute, 3/4 reinforced, unanimity);

– The management company is responsible, among other things, for administrative, accounting, and technical management, taking out building insurance, and collecting fees.

Before buying, it is wise to:

13. Anticipate the authorizations needed for your future work

In a condominium, most work cannot be decided alone:

– Any modification of common areas or the exterior appearance (windows, facades, balconies, pergola, EV charging station in parking, etc.) requires GM authorization, with the required majority depending on the case;

– Many interventions also require a building permit from the municipality (extension, change of use, major renovation).

Even for a simple replacement of windows “like‑for‑like”, the condominium regulations or GM may impose constraints (type of frame, color, etc.). It is better to check in advance whether the work you are considering (or that will be required to improve the EPC) is legally feasible.

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Sales process: preliminary agreement, notarial deed, timelines

In Luxembourg, there are two clearly distinct legally binding steps: the preliminary agreement (or sales commitment) and the notarial deed. Both are binding, but to different degrees and with different consequences.

14. Negotiate and secure the preliminary agreement

The preliminary agreement (bilateral promise) is the cornerstone of the transaction:

– This private contract, usually signed a few days after acceptance of the offer, is legally binding: under Luxembourg law, “a promise of sale constitutes a sale”;

– A deposit, often around 10% of the price, is paid at the time of the preliminary agreement;

– It sets the price, property description, target date for the notarial deed, and suspensive conditions (financing, permit, waiver of pre‑emption rights, etc.).

Before signing, it is prudent to:

– Have the preliminary agreement reviewed by a lawyer or notary;

– Verify that all essential documents are attached (EPC, condominium regulations, GM minutes, etc.);

– Clearly specify the conditions under which the deposit will be returned or retained.

15. Prepare the notarial deed and registration formalities

The deed of sale (authentic deed) is signed before a notary, generally 6 to 10 weeks after the preliminary agreement, allowing time for:

The notary, a neutral public officer, has a central role:

– Final verification of the property title and charges;

– Drafting the deed in accordance with the preliminary agreement and legal rules;

– Calculating and collecting registration and transcription duties, as well as mortgage fees if applicable;

– Transcribing the sale in the land register, making the transfer enforceable against third parties.

On the day of signing, the buyer:

– Pays the duties and fees;

– Signs the deed, typically after a full reading by the notary;

– Receives the keys once the funds are credited to the seller.

The notary then handles the recording and transcription of the transfer with the AED and ACT.

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Extended due diligence: environment, urban planning, risks

Beyond the building itself, the property’s context plays a key role in its value, comfort, and long‑term risks.

16. Check zoning, development projects, and easements

A parcel can be highly sought after… or suddenly lose its appeal, depending on what the municipality plans in its PAG and specific development plans. Before buying, it is essential to:

– Verify that the current use of the property (residential, office, commercial) is consistent with the zoning;

– Check for major infrastructure projects nearby (new highway, train line, high‑rise building) that could affect noise, views, or value;

– Identify any easements (right of way, pipeline, gas line, drainage easement, spring…) that could limit your plans.

17. Assess environmental risks: pollution, flooding, soil

For certain properties – former industrial sites, parcels on old railway corridors or risk zones – an environmental analysis is recommended, or even necessary:

– Consult national databases of potentially polluted sites (official list, soil cadastre);

– For commercial buildings or certain older properties, mandatory asbestos survey before transfer;

– In industrial areas (e.g., around Esch‑sur‑Alzette), use Phase I ESA studies, or even Phase II if soil pollution is suspected (drilling, sampling – costs can reach tens of thousands of euros).

18. Check utility connections and networks

Before buying land or a single‑family home, you must ensure: the conformity of legal documents, the absence of debts or disputes, the condition of the property and any work needed, and the land’s readiness for development.

– The presence and capacity of connections to utilities: water, electricity, gas, telecom, sewer;

– The absence of “wild” or non‑compliant connections;

– Accessibility of meters and any work needed to meet standards.

For housing, a simple test – turn on the water after a week of vacancy to see if there is rust, turn all circuits on and off, check pressure – already gives clues, but an inspection by an electrician or heating engineer can avoid costly expenses after purchase.

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In‑depth financial aspect: fees, return, taxation

Even if you are buying for yourself, it is wise to think like an investor: recurring costs, resale, taxation in case of rental or future sale.

19. Analyze recurring charges and total cost of ownership

The annual cost is not limited to loan repayment. You must include: interest, processing fees, insurance, notary fees, and guarantee fees.

For a rental investor, add tax on rental income and later on capital gains.

20. Understand taxation on resale and inheritance

The texts mention several important points:

In terms of inheritance, Luxembourg taxation is generally favorable, especially among close relatives, but it interacts with the rules of the heir’s country of residence. For large or international estates, it is prudent to consult a tax specialist.

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Buying older property: avoiding the “good deal” trap

Experience shows a recurring pattern: a charming old house on paper can turn into an unmanageable and ruinous construction site if the extent of the upgrades is not properly measured.

21. Properly calibrate the renovation budget for an older property

Sometimes you see a rough figure of €100 to €150/m² for certain light renovation work; but as soon as you touch the structure, the envelope (insulation, facade, roof) and technical systems (electricity, heating), the bill skyrockets.

Several risks add up:

Some owners speak of “buying the house a second time” in renovations. The prudent rule is to:

– Have a thorough expert inspection before the preliminary agreement rather than after;

– Add a comfortable margin (often 20 to 30% of the initial estimate);

– Prioritize completing major structural and energy work before moving in, rather than in stages over several years.

22. Handle the case of occupied or rented properties

If the house or apartment is currently rented, you must anticipate:

Reviewing existing leases, their duration, termination clauses, and rent history is therefore crucial. Also check whether the property is purchased free of any occupation on the day the deed is signed.

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Practical checks not to forget during visits

Beyond heavy legal and technical checks, a series of simple actions during visits prevents many disappointments.

23. Inspect physical details: smells, slopes, access, neighborhood

Certain weak signals deserve attention:

It is useful to visit the neighborhood at different times (evening, weekend) to assess noise, parking, and local life.

24. Check technical equipment and gather history

Systematically ask the seller about:

– Age of the boiler, date and frequency of servicing;

– Existence of a control sticker from the Chambre des métiers (mandatory inspection every 4 years for some installations);

– Invoices and maintenance contracts (boiler, roof, elevator, septic tank if applicable);

– Claims history (water damage, fire) and insurance reports.

In a condominium, ask for inspection reports of common equipment (elevator, boiler room, ventilation) as well as the building’s insurance documents managed by the management company.

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Closing the checklist: summary of 25 points to validate

Without turning your purchase into an endless ordeal, it is valuable, just before you commit, to go through the essentials. By folding in all the previous elements, an operational checklist looks like this:

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By relying on these 25 points, on public tools (cadastre, Geoportail, EPC), and on competent professionals (bank, notary, building expert, lawyer, management company), you turn a risky purchase into a controlled project. This checklist does not prevent falling in love with a property; it simply provides a solid foundation for it to last.

Cyril Jarnias

Cyril Jarnias is an independent expert in international wealth management with over 20 years of experience. As an expatriate himself, he is dedicated to helping individuals and business leaders build, protect, and pass on their wealth with complete peace of mind.

On his website, cyriljarnias.com, he shares his expertise on international real estate, offshore company formation, and expatriation.

Thanks to his expertise, he offers sound advice to optimize his clients' wealth management. Cyril Jarnias is also recognized for his appearances in many prestigious media outlets such as BFM Business, les Français de l’étranger, Le Figaro, Les Echos, and Mieux vivre votre argent, where he shares his knowledge and know-how in wealth management.

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