Project documentation is a large, multi-layered set of documents: dozens of files, several disciplines, hundreds of pages. That is exactly why the same errors repeat with the same regularity across projects, design offices and building types. We compiled the ten most common shortcomings Validorix runs into when it reviews Czech project documentation (projektová dokumentace, PD). Most of them can be caught before submission, if you know where to look.
1. A missing or incomplete supporting documents part
Part E of the documentation (under Decree 131/2024 Coll.) contains the opinions, statements and consents of the authorities concerned and of the owners of neighbouring land. It is the part most often left out or left incomplete in the rush of finalising a project: a current statement from a utility operator, a neighbour's consent or the opinion of the fire rescue service is missing.
2. Outdated references to legislation
The Building Act and its implementing decrees have changed repeatedly in recent years. Technical reports often refer to a number of a law or decree that is no longer valid, typically the old Building Act 183/2006 Coll. instead of the current wording. It is a formally small error, but at the building authority it can delay the proceedings.
3. A missing chapter D.1.4: technical building services
The building services part (D.1.4.a–e: plumbing, heating, ventilation, power installations, low-current installations) is most often shortened on smaller projects, or one of the sub-parts is missing entirely, especially the fire safety connection of power installations.
4. Dimensions that differ between a drawing and the technical report
The classic case: the floor plan shows a different dimension of a room, opening or structure than the technical report of the same discipline. In a manual review, two numbers on different pages of a document are easily not connected. An AI comparison is ideal for this type of error, because it does not forget either value.
5. A conflict between disciplines about the same element
The architectural and construction part, the structural design and the building services describe the same structure (a load-bearing wall, a floor slab, a penetration) with different parameters (thickness, material, opening). These cross-discipline conflicts are among the most expensive errors, because they are often found only on site.
6. Missing occupational safety solution for construction
Government Decree 591/2006 Coll. on safety at work on construction sites requires a safety solution as part of the documentation. On smaller buildings this chapter is neglected or reduced to a general wording with no relation to the specific site.
7. Insufficient environmental protection solution
Handling of construction waste, and protection against noise and emissions during construction (under Government Decree 272/2011 Coll.) are parts of the documentation that are often treated superficially or are missing entirely, especially for renovations in built-up areas.
8. A budget that does not match the project documentation
An item is in the technical report but missing in the budget, or the budget contains items beyond the documentation. A typical example: the thickness of the thermal insulation in the documentation does not match the thickness stated in the itemised budget. This type of mismatch is handled by comparing the budget with the technical report and the bill of quantities.
9. Missing or incomplete document revision information
The version and the revision date of a document are essential so that all parties (investor, contractor, authority) work with the same current version. A missing revision record is formally minor but risky in practice: it easily leads to work on site being done from an outdated version of a drawing.
10. Accessibility solution partly in conflict with Decree 398/2009 Coll.
The width of doors, the slope of a ramp or the height of a threshold do not meet the requirements for barrier-free use of the building. This category of errors is dangerous because it often appears in just one detail of a drawing, while the rest of the documentation meets the requirements. That is exactly why it easily escapes a manual review.
What these errors have in common
Nine of the ten errors do not require expert judgement. They are about formal completeness, consistency of numbers between documents or the currency of a reference to a regulation. This is exactly the type of check where a machine comparison is faster and more reliable than a person tired after five hours of going through PDFs. The last step, deciding whether a finding is really a problem and how to solve it, stays with the authorised person.
Why this matters if you do not read Czech
If you are a foreign investor, developer or private builder in the Czech Republic, you usually receive this documentation in Czech and sign off on it without being able to check it yourself. Knowing the typical errors helps you ask your designer concrete questions: Is part E complete? Do the technical reports and the drawings agree on the dimensions? Does the budget match the design?
How to run the review on your own project
Validorix checks the completeness of the documentation against Decree 131/2024 Coll., compares the disciplines with each other and the budget with the documentation, and adds a citation of the specific file and page to every finding. With the interface set to English, the findings are written in English and keep the original Czech wording next to them. The report therefore not only says that a problem exists, but also exactly where to find it.
Our services
The Validorix team has long worked on digitising construction data. Through our services we help with:
- AI review of documentation, budgets and IFC models: upload a project at validorix.com and get a report within minutes.
- Digitisation of projects and design support: converting paper and PDF documentation into structured data and BIM models, and bringing older documentation up to today's standards.
- Building surveys, 3D scanning and scan-to-BIM: a measurable digital base for property management and renovation.
- Consulting and training: workshops for designers, investors and public clients on BIM, EIR/BEP, IDS and documentation review.
The scope and price are agreed individually. To enquire, write to info@validorix.com.
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