Inspection and Test Plan (ITP) for Construction Projects in Germany
An inspection and test plan (ITP) lists, for each trade, what is inspected or tested, against which requirement, by which method, how often, at which stage and by whom, and which record proves it. Its core are hold points, where work stops until the inspection is passed, and witness points, where the owner is invited to attend. On German projects the ITP has to be linked to the construction contract, German standards (DIN, EN) and the legal acceptance under VOB/B or the German Civil Code.
International owners, data center operators and industrial clients are used to running projects with a quality control plan and ITPs. German contractors work with similar tools, but under different names: Prüfplan, Haltepunkte, Eigenüberwachung. Mixed teams lose time when these systems are not aligned. This guide explains how an ITP is structured, what is specific to construction in Germany and how an owner uses it to control the general contractor or trade contractors.
What an inspection and test plan is
An inspection and test plan is the working document of construction quality control. It breaks the project down into activities and defines for each activity which characteristics are checked, which document sets the acceptance criteria, which inspection or test method is used, how often it is applied, at which stage it takes place and who performs, attends and signs off. It sits below the quality control plan (QCP), which sets the overall rules: organisation, responsibilities, document control, non-conformity handling and reporting.
An ITP is not required by German law. It becomes binding through the contract. If hold points, notice periods and record requirements are not part of the construction contract, the owner can request them but cannot enforce them easily.
Contractor self-inspection and owner inspection
Under VOB/B, the standard terms used in most German construction contracts, the contractor performs the work under its own responsibility (§ 4 para. 2 VOB/B) and controls its own quality. Many contractors work with their own test plans for this. At the same time the owner has the right to monitor contractual performance, to access the site, workshops and storage areas and to inspect execution documents and the results of quality tests (§ 4 para. 1 no. 2 VOB/B).
The owner-side ITP builds on this. It uses the contractor's self-inspection by requiring its records and adds the owner's own inspections at points where a defect is expensive or will be hidden. In the German fee structure for architects and engineers (HOAI), monitoring of the works against permit, contracts, design and recognised rules of engineering is part of construction supervision in work stage 8. Where supervision lies with the general contractor, an owner-side QA/QC function takes over this role for the defined inspection points.
Inspections required by building law are a separate layer. Structural checks by state-approved checking engineers (Prüfingenieure, Prüfsachverständige) and third-party surveillance of certain construction products are not replaced by the owner's ITP. A good ITP lists them as dates and records so that they are not missed.
Structure of an ITP line
| Column | Content |
|---|---|
| Activity and element | for example concrete works, ground slab grid A to F |
| Characteristic | what exactly is checked: reinforcement position and cover, waterstops, penetrations |
| Reference document | drawing with revision, specification item, standard, manufacturer instructions |
| Acceptance criteria | the measurable requirement or the reference to it |
| Method | visual inspection, measurement, document review, sample test, functional test |
| Frequency | each element or sampling rate |
| Inspection point type | hold, witness, review or surveillance |
| Parties | contractor, owner QA, designer, third party |
| Record | inspection report, photos, measurement log, delivery note, release note |
Hold, witness, review
A hold point means work stops until the inspection has taken place and the release is given. Hold points belong where an element is covered afterwards: reinforcement before concreting, waterproofing before backfilling, the airtight layer before linings. A witness point is an inspection the owner is invited to; if nobody attends within the notice period, the contractor proceeds and records the result itself. A review is a document check without site attendance, such as material certificates or shop drawings. In German practice the terms are Haltepunkt, Bezeugungspunkt and Dokumentenprüfung; the whole plan is usually called Prüfplan.
Every hold point costs time on site. Keep as many as necessary and as few as possible, and agree a notice period in the contract for each of them. A hold point the inspector misses quickly becomes a delay claim.
Sample ITP lines
Simplified examples to show the principle. Characteristics and sampling follow contract, design and risk on the actual project.
| Element | Characteristic | Reference | Stage | Type |
|---|---|---|---|---|
| Ground slab | reinforcement, spacers, waterstops, embedded items | reinforcement and joint drawings | before concreting | Hold |
| Basement walls | waterproofing, transitions, penetrations, protection layer | waterproofing design, DIN 18533 | before backfilling | Hold |
| Structure | dimensions, flatness, angles, openings | design, DIN 18202 | before fit-out | Witness |
| Structural steel | execution documents, welding records, corrosion protection | shop drawings, DIN EN 1090-2 | before erection | Review |
| Windows and facade | fixing, sealing layers, connections | details, manufacturer instructions | before render or cladding | Hold |
| Airtight layer | joints, connections, penetrations | airtightness concept, DIN 4108-7 | before linings | Hold |
| MEP in shafts and ceilings | routing, supports, fire stopping, pressure test records | coordinated design, fire safety concept | before closing | Witness |
What is specific to Germany
- Standards: acceptance criteria refer to DIN and EN standards and to the „anerkannte Regeln der Technik“, the recognised rules of engineering. Examples: DIN 18202 for tolerances in building construction, DIN 18531, 18533 and 18534 for waterproofing of roofs, below-ground elements and wet rooms, DIN 4108-7 for airtightness, DIN EN ISO 9972 for the blower door test, DIN EN 1090-2 for execution of steel structures.
- Construction products: which certificates a product needs (declaration of performance under the EU Construction Products Regulation, German technical approval, European Technical Assessment) is governed by the administrative regulation on technical building rules, MVV TB, introduced by the federal states; in Hesse as H-VV TB. The ITP should require these documents before installation.
- Joint condition records: under § 4 para. 10 VOB/B the condition of parts of the work that will be covered can be recorded jointly on request, with a written result. This fits naturally into hold points.
- Defects during construction: work recognised as defective during execution must be replaced by the contractor at its own cost (§ 4 para. 7 VOB/B).
- Acceptance: the legal acceptance („Abnahme“ under § 640 BGB or § 12 VOB/B) starts the limitation period for defect claims and usually shifts the burden of proof to the owner. For buildings the period is five years under the German Civil Code (§ 634a BGB) and four years under VOB/B unless agreed otherwise (§ 13 para. 4 VOB/B). ITP records collected before acceptance are therefore valuable evidence.
- Language: site communication with German contractors is in German. ITPs for international owners are often bilingual; we keep the German technical terms next to the English ones so that both sides read the same document.
Common mistakes
- The ITP lists standards but no specific characteristics and stages.
- Hold points are in the ITP but not in the construction contract, and notice periods are missing.
- Non-conformities are recorded but not closed with a deadline and verification.
- Material certificates arrive with the handover documentation instead of before installation.
- Civil and MEP inspections run in parallel without coordination and without a joint report.
- The ITP is written at mobilisation and never updated.
How we support owners
Schneider Theißing is a firm of civil engineers in the Frankfurt Rhine-Main and Rhine-Neckar regions working exclusively on the owner side. We set up or review the quality control plan and ITPs, anchor hold points and record requirements in the tender documents, witness inspections on site and report to owners, investors and lenders in English and German. Typical projects are data centers, industrial and logistics buildings, offices and residential developments. More on the service: QA/QC Management for Construction Projects in Germany and Data Center Construction Management Frankfurt. German-speaking readers find the equivalent guide under Qualitätssicherungsplan und Prüfplan.
ITP or owner-side QA/QC for your project?
Frequently asked questions
No. There is no general legal requirement for an ITP. Certain inspections and certificates are required by building law, for example structural checks or certificates for construction products. The ITP is a contractual project tool that includes these obligations and adds the owner's own inspections.
Both are common. The contractor often submits ITPs for its self-inspection, and the owner adds hold points and its own inspections. On larger projects the owner sets the framework in the tender documents so that the contractor prices its participation.
At a hold point work stops until the inspection is passed and released. At a witness point the owner is invited; if nobody attends within the agreed notice period, the contractor proceeds and records the result itself.
Usually Prüfplan, as part of a Qualitätssicherungsplan. Hold points are called Haltepunkte, witness points Bezeugungspunkte. Contractor self-inspection is called Eigenüberwachung.
Our core is the quality of the building construction and its interfaces to MEP: penetrations, fire stopping, supports, access and the test records of the MEP contractors. Technical testing of the installations and commissioning are coordinated with the MEP engineers and commissioning agents appointed for the project and consolidated in one quality report for the owner.
Quality control on the owner side
Tell us the project, the contract setup and the phase. We reply with a proposed scope and a written offer.