The 25 Questions You Should Ask Every Prefab House Provider
A prefab house is one of the largest investments in life – all the more important to check the provider before signing. This guide provides 25 concrete questions on contract, price, build time, references and insolvency protection, each with a brief justification. That way you recognise how transparently a manufacturer works. The complete list is available as a print version via our checklists.
For most people a prefab house is the biggest investment of their lives – which makes it all the more important to put the provider through its paces before you sign. Asking the right questions quickly reveals how transparent a manufacturer is about prices, construction times and its own insolvency protection. This guide provides 25 concrete questions you should put to every prefab-house provider – sorted by contract, price, construction time, references and insolvency protection. Each question comes with a short explanation, so you know what the answer should tell you. You can take the complete list with you as a printable version via our checklists.
Why the right questions are decisive
Short answer: Comparing prefab-house providers only works if you probe systematically, beyond floor plan and price. The right questions reveal whether an offer is genuinely comparable, which services are included and how a provider handles risks such as construction delays or insolvency. As a rule of thumb: anything promised verbally should also appear in writing in the contract or the building specification. Anyone who asks 25 targeted questions and lays several providers' answers side by side makes a far better-founded decision than through a pure price comparison.
It's best to take the questions along to your appointment at the show home or to the consultation. Our show-home viewing checklist shows how to prepare such a visit in a structured way. You can conveniently plan several appointments with the viewing planner.
Which questions to ask about the contract
Short answer: With the contract it's all about clarity and commitment: you clarify what type of contract it is, which services are firmly promised and how change requests and cancellation are handled. The goal is that no important promise stays purely verbal.
- Is this a consumer construction contract (Verbraucherbauvertrag) under the German Civil Code (BGB)? – It secures mandatory disclosures and a right of withdrawal.
- Is the building specification part of the contract? – Only then are the services legally binding.
- How are special requests and later changes billed? – Shows how expensive add-ons can become.
- What cancellation and withdrawal rights do I have? – Important if your life situation changes.
- Is there a contractual penalty for construction delays? – Creates an incentive for on-time completion.
Contract review is so important that a dedicated guide is devoted to it; our guide to the construction contract explains the key mandatory content and the pitfalls.
Which questions to ask about the price
Short answer: With the price it's about making hidden costs visible and finding out what the quoted figure really covers. A low headline price is of little use if key services are missing and later get added on as expensive extras.
- Is the price a fixed price and how long is it valid? – Protects you from additional demands during construction.
- Which services are NOT included in the price? – Reveals typical gaps such as earthworks or the floor slab.
- How is the payment schedule structured? – Payments should track construction progress.
- Are ancillary building costs (Baunebenkosten) and site development included? – These items noticeably drive up the total budget.
- Is there a price escalation clause? – It can raise the final price after the fact.
Bundle your show-home appointments cleverly
With the right questions in hand you get the most out of every consultation. Plan several provider visits in one day and compare the answers directly side by side.
Which questions to ask about the construction time
Short answer: With the construction time you clarify how binding the deadlines are, what happens in the event of a delay and who actually carries out the build. Especially with a prefab house involving factory prefabrication, realistic, contractually fixed deadlines are an important quality signal.
- How long does the build take from building application to handover? – Gives you a realistic time frame.
- Are the stated deadlines contractually binding? – Only binding deadlines are enforceable.
- What happens in the event of a construction delay? – Shows whether you are protected.
- Do you use your own fitters or subcontractors? – Affects quality and accountability.
- How does the assembly day work? – Clarifies the process and your obligations to be present.
How such an assembly day typically unfolds is described in our guide to the prefab-house assembly day.
Which questions to ask about references and quality
Short answer: References and certificates tell you about a provider's experience and quality. Ask about completed houses in your region, about reviews from previous clients and about quality marks that prove the manufacturing quality.
- Can you name reference projects in my region? – Lets you look at real houses.
- May I speak with previous clients? – Honest providers don't shy away from this.
- Which quality marks and certifications do you hold? – Proves verified manufacturing standards.
- How long have you been in the market and how many houses do you build per year? – Shows experience and stability.
- How is the warranty regulated? – Important for later defect claims.
How to make sense of warranty and construction acceptance is explained in our guide to construction acceptance and warranty.
Which questions to ask about insolvency protection
Short answer: Insolvency protection is one of the most frequently overlooked yet most important topics: it determines whether the payments you've made are safeguarded should the provider become insolvent during construction. Ask specifically about securities such as a completion guarantee (Fertigstellungsbürgschaft) and whether the payment schedule requires advance payments.
- Is there a completion guarantee (Fertigstellungsbürgschaft) or similar security? – Protects your payments in the event of insolvency.
- Will I ever pay more than has already been built? – Advance payments increase your risk.
- How is the company positioned financially? – Creditworthiness and balance sheet give clues.
- Who finishes the build in the event of insolvency? – Clarifies the worst case in advance.
- Is there protection under the Broker and Property Developer Ordinance (Makler- und Bauträgerverordnung)? – Relevant depending on the contract model.
All 25 questions as a printable version
You'll find the complete list of these 25 questions in a compact, printable form in our checklist collection. That way you can tick off each category directly at the appointment and compare several providers' answers systematically – simply open the checklist overview.
Find the right provider with the right questions
Use the 25 questions to compare providers directly. Plan several viewings efficiently and make your decision on a solid basis.
What does your dream house really cost?
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Compare house prices nowImportant questions briefly explained
The most common price questions around The 25 Questions You Should Ask Every Prefab House Provider – answered concisely by the Prefabricated House editorial team (as of 2026).
