NS 8405:2008, Norwegian building and construction contract

Designation

NS 8405:2008

Edition

2008

Publisher

Standard Norge

Group

Contract standards for construction

Area

Municipal and administrative law

Read date

2026-09-09

Standards are not statute. They are purchased documents from Standard Norge that parties agree to, or that regulations refer to. We carry the designation, edition and scope, never the text.

• Buy the standard from Standard NorgeNS 8405:2008
• Publisher: Standard Norge

• Planning and Building Act

  LOV-2008-06-27-71In force: 2009-07-01Direktoratet for byggkvalitet

  The Act governs land-use planning at national, regional and municipal level, and its building part sets the requirements for applications, responsibility, control, completion certificates and supervision. It determines both what may be built where and who answers for the works.

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• Contracts Act

  LOV-1918-05-31-4In force: 1918-07-03Forbrukertilsynet

  The Act regulates how contracts become binding through offer and acceptance, agency, and invalidity in cases of duress, fraud, unreasonableness and failed assumptions. Section 36 is the general basis for setting aside unreasonable contract terms.

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• Simplified Norwegian building and construction contract

  NS 8406:2009Standard Norge

  The simplified execution contract, made for smaller and less complex projects. It has fewer and milder notice rules than NS 8405 and suits parties who do not want a fully formalised notice regime. Many small trade businesses meet this one first.

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• General contract provisions for design and build contracts

  NS 8407:2011Standard Norge

  The design and build contract, where the contractor is responsible for both design and execution. The standard allocates design risk and governs functional responsibility, variations, the client's cooperation, takeover and defect claims during the guarantee period.

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• Norwegian subcontract for construction work

  NS 8415:2008Standard Norge

  The subcontract mirroring NS 8405 down the contract chain, so that the main contractor's duties and deadlines are passed on to the subcontractor. It matters to small suppliers, because notices must be given in time at both levels.

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• General contract provisions for design and build subcontracts

  NS 8417:2011Standard Norge

  The design and build subcontract: the same risk allocation as NS 8407, but between the design and build contractor and a subcontractor carrying design responsibility. It is used where a trade contractor both designs and builds its part.

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