Cost: turnkey house construction
Compare a total budget and identical specification rather than square-metre prices alone. Land, design, foundations, equipment, connections and external works may sit in different contracts. No Luxembourg average or standard fee percentage is established.
Editorial update on 19 September 2026
Compare a defined area
Clarify habitable, gross, basement and ancillary areas used in calculations. Compare identical plans and equipment. Separate building, land and related costs; check included fees and connections before adding them again.
State assumptions
Assess ground, slope, water, soil removal and network distance for the project. Ask which investigations underpin pricing and how differences are handled. Timber and masonry have no universal price advantage.
Write financial terms
Specify taxes, validity, revision clauses, payment stages, allowances and variations. Identify remaining costs before occupancy and a reserve suited to uncertainties. Do not finance the project through promised near-zero heating bills or guaranteed resale value.
The three budget levels
Where your money goes
- Land and designOn quotationAcquisition, design and investigations separated.
- ConstructionOn quotationDefined structure, envelope and equipment.
- FinishesOn quotationSelections, allowances and exclusions.
- Connections and surroundingsOn quotationWork through actual usability.
What makes the price vary
Plot
Ground, access and networks.
Project
Defined area and complexity.
Scope
Actual delivery standard.
Contracts
Revision, fees and variations.
Indicative scenarios
Guichet.lu specifies LENOZ sustainability criteria and timing conditions for sustainable new-build support. AAA, timber or passive-house terminology alone does not establish eligibility. Verify the project’s scheme and evidence before including support in financing.
Frequently asked questions
Does turnkey include everything?
Only the specification tells you. Check kitchen, external works, design and connections.
Build without an architect below an area threshold?
Do not assume an exemption based on area alone. Confirm the required new-house design role with the architect and municipality.
Does AAA automatically qualify for aid?
No. Assess the sustainable construction scheme’s conditions for the project.
Can the first estimate guarantee a date?
Request a contractual schedule and conditions. Without approvals and final choices, an estimate cannot establish a certain completion date.
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