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construction contract

noun · Bauvertrag

Since 1 January 2018 the Bauvertrag has its own set of provisions, §§ 650a ff. BGB, sitting on top of the general law of contracts for work. The most consequential of them is the employer’s power to order changes unilaterally, which no English construction contract grants without an express variation clause, and which cannot be drafted away in standard terms.

Which translation, when

Bauvertragthe type: a Bauvertrag is a contract for work concerning the construction, restoration, removal or reconstruction of a building, an outdoor installation or a part of one, and the special provisions of §§ 650b ff. BGB apply on top of the general rules for contracts for work, which is why the Werkvertrag vocabulary of Unternehmer and Besteller runs through every clause.
die Sonderregelnwhat the reform added: the set introduced by the construction contract reform of 28 April 2017 with effect from 1 January 2018 covers the employer’s right to order changes and the adjustment of the price, interim injunctions about both, the builder’s security interests, the recording of the condition of the works where acceptance is refused, the final account and the requirement that any termination be in writing.
Nachbarverträgethe neighbouring types: the consumer building contract, the architect’s and engineer’s contract and the developer contract each have their own chapter with their own rules, so a translation should establish which of the four is in front of it before using the general word; and the standard industry conditions of the VOB/B are contract terms rather than law, whose incorporation runs on the review the standard terms entry holds.

Why

Construction contract is the Bauvertrag, and a current translation has to know that German law only acquired a dedicated regime for it on 1 January 2018. Until then a building project ran on the general law of contracts for work, supplemented in practice by the VOB/B, the standard conditions the construction industry drafted for itself. The reform of 28 April 2017 inserted §§ 650a to 650v BGB and gave the field a statutory backbone. The definition is functional: a Bauvertrag is a contract for work about the construction, restoration, removal or reconstruction of a building, an outdoor installation or part of one, and the special rules apply on top of the general ones, so the parties keep the names Unternehmer and Besteller that the law of contracts for work gives them rather than becoming contractor and employer in the English sense. What the special rules add is the part English lawyers should read first. The employer may demand changes and, if no agreement is reached within the statutory period, order them, with the price adjusted accordingly, and the details belong to the variation order entry. Disputes about that power can be taken to an interim injunction. The builder has statutory security, both a security interest in the land and a claim to security from the employer. Where acceptance is refused, the condition of the works can be formally recorded. And termination of a Bauvertrag requires written form. Four neighbouring contract types carry their own chapters, the consumer building contract, the architect’s and engineer’s contract and the developer contract, so a document should be placed before the general term is used.

Typical mistakes

  • The statutory regime for construction contracts dates from 2018, so older sources describe a position governed only by the general law of contracts for work.
  • The parties are Unternehmer and Besteller under the law of contracts for work, so importing the English contractor and employer roles can misname them in a German clause.
  • The VOB/B are contract terms and not statute, so they apply only if validly incorporated and remain subject to review.

What matters

Preparing a German building contract for a foreign client: the draft should identify which of the four statutory contract types applies, keep the Unternehmer and Besteller terminology, and state expressly whether the VOB/B are incorporated.

Authority

  1. § 650a BGB
  2. § 650h BGB

What the machine misses

Machine output for construction contract gives Konstruktionsvertrag or Bauauftrag, neither of which the Civil Code uses, and the statutory type is the Bauvertrag of §§ 650a ff. BGB with its own rules on changes, security and termination; the invented wording also hides that the regime is only in force since 2018 and that the VOB/B are terms rather than law.

See what the machine does with this clause →

Examples

a construction contractein Bauvertrag
the contractor and the employerder Unternehmer und der Besteller
a consumer building contractein Verbraucherbauvertrag
termination requires written formdie Kündigung bedarf der Schriftform
Checked 09 Aug 2026 finepost.co.uk/notes/construction-contract