Turnkey builder in Luxembourg: complete guide

What is a turnkey builder?

A turnkey builder is a company that takes charge of the entire construction project, from design to key handover. Unlike the OAI architect approach where you coordinate multiple companies, the turnkey builder is your single point of contact.

How the turnkey model works

The process typically unfolds in three stages:

1. Design phase (3-6 months): Plan preparation, building permit application, administrative requests
2. Construction phase (10-14 months): Execution of work, coordination of all trades
3. Handover phase (1-2 months): Home reception, key handover, contractual guarantees

The key advantage: you have only one company to contact for all questions and issues.

Advantages of turnkey builders

1. Fixed and predefined price

The price is agreed by contract before work begins. Example: €350,000 for a 100 m² house. You know exactly how much you’ll spend, without risk of budget overruns due to site surprises.

2. Single responsible point of contact

You have only one person or team to contact for all your needs, questions, and problems. This significantly simplifies project management. If a problem arises, responsibility is clearly defined.

3. Controlled and respected timelines

With proven processes, the builder guarantees a realistic and respected schedule. A turnkey project typically takes:

• 3-6 months to obtain building permit
• 10-14 months of actual construction
• Total: approximately 13-20 months from start to key handover

4. Controlled quality and guarantees

The builder is responsible for the quality of their work. They provide legal guarantees (10-year structural guarantee, 2-year defects guarantee, construction defect insurance). These protections are included in the contract.

5. Reduced administrative stress

The builder handles all administrative procedures: permit file, authorizations, official inspections, coordination with public agencies. You’re spared from bureaucracy.

6. Controlled trades coordination

The builder manages all trades (masonry, electrical, plumbing, heating, etc.). He is responsible for their coordination and the quality of the final result.

Disadvantages and limitations of turnkey

1. Limited design freedom

You must choose from house models and options offered by the builder. Unlike an architect-designed project, you cannot completely customize every detail. Variations are usually limited to interior layouts or basic finishes.

2. Standardized materials and finishes

The builder uses materials negotiated at volume prices. You may have options to choose from, but not the freedom to choose any product on the market. Upgrades to premium materials are charged as extras.

3. Costly modifications

Any modification or customization beyond basic options incurs additional charges. These « extras » can quickly increase the total project cost. Late modifications may also delay delivery.

4. Dependence on company stability

If the builder encounters financial difficulties during construction, your project may be affected. While construction defect insurance protects you, this situation can cause stress and delays.

5. Limited control over subcontractors

The builder uses his usual subcontractors. If you have particular preferences or special requirements, you must negotiate directly with the builder, who may not accept your requests.

6. More complex claims

In case of defects or poor workmanship, you must contest directly with the builder, who may dispute liability. The process can be long and contentious, particularly for minor defects.

Main turnkey builders in Luxembourg

1. Maisons Tradilux

Founded in 1990, Tradilux is one of the market leaders with over 980 houses built in Luxembourg. The company stands out for its 30+ years of experience and expertise in passive and ecological homes.

Specialties: Passive houses, ecological houses, traditional houses, extensions, renovations. Tradilux’s philosophy prioritizes reducing carbon footprint from design through use. The company is known for its personalized service with a small team that maintains a family atmosphere.

Contact: 16, avenue de la liberté, L-1930 Luxembourg | www.tradilux.lu

2. Maisons Loginter (Arend & Fischbach)

Founded in 1995 within the Arend & Fischbach group (founded in 1989), Maisons Loginter has built approximately 580 houses. It is a Luxembourg pioneer of passive housing and built the country’s first certified passive house in 2026.

Specialties: Passive houses, nZEB houses (Nearly Zero Energy Building), solid wood ecological houses, custom single-family homes. The company privileges constant dialogue with clients for solutions adapted to each project.

Recognition: Winner of FEDIL Environmental Award in 2026 for its sustainable approach.

Contact: Headquarters in Mersch | www.arend-fischbach.lu

3. Thomas & Piron

Founded in 1976, Thomas & Piron is an industry giant with average annual turnover of 200 million euros. The group is number 1 in the French-speaking part of Belgium and has a significant presence in Luxembourg with over 1,500 group employees.

Specialties: Residential construction, office buildings, commercial developments, industrial projects. In Luxembourg, the company offers apartments and single-family homes, notably in the Hollerich area with prices starting from €675,000.

Contact: www.thomas-piron.lu

4. CLK (Turnkey houses)

Established builder with over 1,000 turnkey houses completed in Luxembourg since inception. CLK is recognized for its expertise and extensive portfolio of Luxembourg projects.

Specialties: Individual turnkey homes, quality solid constructions.

Contact: www.clk.lu

5. Naturhome

Wood construction specialist, Naturhome offers ecological and sustainable timber-frame houses. The company focuses on turnkey houses using natural materials and environmentally responsible construction techniques.

Specialties: Timber-frame houses, ecological constructions, sustainable turnkey homes.

Contact: www.naturhome.lu

6. Other major builders

Several other companies offer turnkey services in Luxembourg:

• Majerus Geimer: Specialist in sustainable constructions and passive houses
• Yelo-Bau: Expert in turnkey residential construction
• Roma-Bau: Sustainable solid house builder
• Bau Orkestra: Fully integrated construction services
• DGBL Construction: All types of turnkey construction

CCMI contract and guarantees in Luxembourg

What is a CCMI contract?

CCMI stands for « Contrat de Construction de Maison Individuelle » (Individual House Construction Contract). It’s a standard contract recommended in Luxembourg for turnkey construction contracts. It sets out the rights and obligations of each party and protects the consumer.

Key elements of CCMI contract

• Definitive price: Total price, excluding land, fixed before work begins
• Execution deadline: Planned key handover date, with agreed margins
• Specifications: Detailed description of work to be performed
• Payment terms: Payment schedule (advances, final payment)
• Construction defect insurance: Mandatory insurance against construction defects
• Legal guarantees: 10-year guarantee (structures) and 2-year guarantee (equipment)

Included guarantees

10-year structural guarantee: The builder is responsible for defects compromising stability or normal use of the house for 10 years after delivery.

2-year defects guarantee: The builder is responsible for minor defects in equipment and finishes for 2 years.

Construction defect insurance: Insurance covers construction defects during and after work, even if the builder disappears.

Legal perspective in Luxembourg

In Luxembourg, the legal framework is based on the Law of March 27, 1986 on consumer protection regarding real estate sales contracts. While the French CCMI Law doesn’t apply directly, the CCMI contract is a recommended contractual standard for its clarity and protections.

Advice before signing

• Carefully review the specifications and list of inclusions/exclusions
• Verify the price is truly fixed (if not, what are adjustment conditions?)
• Clarify deadlines and penalties for delays
• Check guarantees and construction defect insurance
• Consult a notary or lawyer if you have doubts
• Ask for all details on extras and possible additional costs

Selection criteria for your builder

1. Reputation and experience

Check the number of houses built, years in business, and customer reviews. A builder established for over 10 years is generally more reliable than a new company. Check online reviews (Immodvisor, Google) and ask for references from previous clients.

2. Standards compliance

Check that the builder complies with Luxembourg and European standards (energy performance, safety, accessibility). Ask for certifications (nZEB, passive, etc.) and compliance statements.

3. Financial stability

A financially stable company is less likely to encounter difficulties during construction. Ask for information on company viability. Verify that construction defect insurance is in place and current.

4. Price transparency

The builder must provide a detailed quote with:

• All included and excluded items
• Pricing for extras and modifications
• A clear total price
• Adjustment conditions (if applicable)

5. Timelines and reliability

Ask for proposed timelines and penalty conditions for delays. A reliable builder gives realistic deadlines and respects commitments. Check punctuality with former clients.

6. Options and customization

Explore the catalog of models and available options. If you seek significant customization, verify the builder can accommodate it and understand the additional cost.

7. After-sales service

How does the builder handle guarantees and claims after delivery? Is there a designated customer relationship manager? What is the response time for issues?

8. Site visits

Request the opportunity to visit ongoing construction sites or completed houses. This allows you to verify work quality and site organization.

Pricing and budgets for turnkey homes

Price range in 2026

The Luxembourg market offers a wide range of prices depending on finish level, size, and materials used:

Concrete budget examples

• 100 m² standard house: €130,000 – €250,000
• 125 m² ecological wood house: €300,000 – €350,000
• 150 m² turnkey house: €195,000 – €375,000
• 120 m² passive house: €280,000 – €450,000

Factors influencing price

Elements typically included

The « turnkey » price normally covers:

• Structure and shell (foundations, walls, roof)
• Systems (electrical, plumbing, heating, ventilation)
• Insulation and waterproofing
• Interior finishes (paint, tile, floor covering)
• Doors, windows, carpentry
• Equipped kitchens and bathrooms
• Building permit and administrative procedures
• Legal guarantees and construction defect insurance

Elements typically excluded

• The land
• External landscaping (driveways, landscaped gardens)
• Pool or any leisure equipment
• Very premium finishes
• Complex custom modifications
• Notary fees

Budget advice

Frequently asked questions