Renovating before selling in Luxembourg: what really pays off

Buyers buy a budget, not a house

In Luxembourg, every buyer does the same sum: purchase price, plus works, plus fees. Every visible defect becomes a negotiating point – and buyers almost always assume it costs more than it really does.

A questionable roof, windows from 1985, a tired boiler: to you, that’s €20,000 of work. To the buyer, it’s €40,000 of risk. The difference comes straight off your sale price.

Works that pay off

What raises the price is whatever removes a worry for the buyer. Not what simply looks nice.

Energy performance. An energy performance certificate is mandatory when you sell. A poor rating shows up in the listing and puts off buyers who calculate their running costs. Insulating the roof, replacing windows or upgrading the heating improves both the rating and the price.

Damp and roofing. A stain on the ceiling costs more in negotiation than any repair. Have it fixed and keep the invoices.

Electrics and safety. An up-to-standard fuse board reassures the buyer and their bank.

Small repairs. Neutral paint, fresh grouting, doors that close properly. A few days’ work, and the property looks well maintained.

The right question isn’t “how much will the works cost?”, but “how much will the buyer knock off if I don’t do them?”.

What is your property worth today? Get a valuation without listing it →

Works that lose you money

The high-end kitchen, the designer bathroom, the extension. You pay for your taste; the buyer wants their own. These works are rarely recovered in the sale price.

For a prestige property, this is even more true. The buyer often already has an architect. They are looking for location, structure and potential. In that case, you are better off selling with a clear cost estimate than with half-finished works.

Klimabonus 2026 grants

The state covers part of the cost of energy renovation for homes more than 10 years old: roof, façade and floor insulation, window replacement, controlled ventilation. The grant is calculated per square metre, depending on materials and performance level.

Three rules to remember. An approved energy advisor must support the project. Approval must be requested before the work begins. And each building element can only be subsidised once. The exact conditions are on Guichet.lu.

Finding the right tradesperson without losing your evenings

This is often where everything stalls. Good tradespeople are busy, quotes arrive late, and comparing three offers becomes a second job.

For our selling clients, we recommend Vert.lu, Secretimmo’s sister platform dedicated to renovation in Luxembourg. The benefits are simple:

• Free and no commitment. Describe your project once and receive suitable offers.
• Verified tradespeople. All are registered with the Chambre des Métiers and based in Luxembourg.
• Compare several quotes. You stay in control: compare, negotiate or decline, at no cost.
• Grants in mind. Vert.lu helps you check which Klimabonus grants are available for your project.
• In French, German and English.

Insulation, windows, heat pump, roofing, electrics: describe your project on Vert.lu and get your quotes before you even set your sale price.

Renovate or sell as is? Our approach

We always start with the valuation. It shows what your property is worth today, and what it would be worth after the works. If the difference clearly exceeds the cost of the works, we renovate. If not, we sell as is, with quotes in hand to reassure the buyer.

And because we sell off-market, your property is not exposed while the work is being done. No listing, no photos online. You present it when it’s ready.

Frequently asked questions

Do I need an energy certificate to sell in Luxembourg?

Yes. The energy performance certificate is mandatory for a sale. Get it done early: it also shows you which works would improve the property’s rating.

Can I claim the Klimabonus if I sell after the works?

The grant is tied to the works carried out on the home, under the conditions set out on Guichet.lu. Approval must be requested before the work begins, with an approved energy advisor.

Is Vert.lu really free?

Yes, for owners. You receive offers with no commitment and remain free to turn them down.

Is it better to renovate or lower the price?

It depends on the gap between the value before and after the works. A confidential valuation gives you the answer in minutes.