German Builders Face New Liability Risks as NRW Overhauls Building Code

Legal experts are warning construction companies in North Rhine-Westphalia (NRW) to brace for heightened liability exposure when a sweeping amendment to the state's building code takes effect on 1 September 2026. The warning comes as a separate push for cheaper, simpler construction—known as "Gebäudetyp E"—creates legal uncertainty, while a recent Federal Court of Justice (BGH) ruling sharpens defect liability further.

Warnings Over "Gebäudetyp E" Loopholes

The concept of "Gebäudetyp E" is intended to allow builders and developers to cut costs by departing from standard technical norms. But an attorney at the ARGE Baurecht (Working Group for Construction Law) cautions that vaguely defined terms such as "simple standard" and "contemporary usability" are a recipe for disputes. Under this approach, DIN standards no longer automatically count as the generally recognised rules of technology, shifting the landscape for contractors.

Builders face extensive obligations to inform clients about what they are agreeing to. If the promised savings of 10 to 20 percent fail to materialise, the contract can revert to default terms, triggering drawn-out arguments over whether work is defect-free. "The legal uncertainty is significant," the attorney noted, urging firms to document every step.

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BGH Tightens Defect Liability

Parallel to the legislative changes in NRW, the BGH has strengthened the hand of property owners. In a ruling dated 13 November 2025 (case number VII ZR 187/24), the court held that under certain conditions, clients can claim damages for defects without first setting a deadline for the contractor to remedy the issue.

A second ruling on 27 November 2025 further raised the stakes: when fixing late-appearing defects, contractors cannot deduct a "new for old" adjustment. That eliminates a common cost-saving mechanism, increasing the financial risk for firms responsible for long-term maintenance.

NRW's New Building Code: Speed vs. Clarity

The NRW state parliament approved the third amendment to the building code in mid-July 2026, aiming to accelerate construction procedures. Two flagship measures are the introduction of a "deemed approval" (Genehmigungsfiktion) under the simplified process in § 74 BauO NRW and a dedicated "Umbauordnung" for existing buildings.

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Daylight requirements have been tightened: windows must now measure at least one-tenth of the room's floor area, with a minimum of 0.5 square metres. In certain zones, builders are partially exempt from following generally recognised technical rules—a move designed to foster innovation but one that also feeds the liability concerns raised by the ARGE Baurecht.

GEIG Novella Adds Duties for Property Managers

Adding to the compliance burden, the amended Gebäude-Elektromobilitätsinfrastruktur-Gesetz (GEIG) was passed in July 2026 and introduces new standards for charging infrastructure. The thresholds are clear:

• Residential buildings: requirements kick in when there are more than three parking spaces.
• Non-residential buildings: obligations begin at more than five parking spaces.

Property managers now carry enhanced inspection and information duties toward owners. "A structured process is essential," experts advise, recommending early assessment of technical feasibility and timely communication with owner associations. Failure to do so can trigger liability claims for breach of duty. The warranty obligations explicitly cover mechanical, electrical, and sanitary systems as well as fixed installations—not just structural elements.

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