STR 1.07.03:2017 – Regulation on Building Maintenance and Engineering Structure Cadastre Formation
The Statybos techninis reglamentas STR 1.07.03:2017 is a technical building regulation issued by the Ministry of Environment of the Republic of Lithuania. It establishes the mandatory procedures for the technical maintenance and use of residential and non-residential buildings, hydro-technical structures, and other engineering constructions. This document is a consolidated version effective from November 2, 2025, incorporating updates regarding the Building Data Bank Information System (PDB IS) and European Union directives on building energy performance.
The regulation defines the responsibilities of building users and technical supervisors, detailing the requirements for routine observations, annual inspections, and extraordinary surveys. It covers diverse regulatory domains including the formation of new Real Estate Cadastre Objects (specifically engineering structures) through division, separation, merging, or subdivision. Specific technical criteria are provided for hydro-technical structures, including a standardized scoring system for assessing the condition of elements like dams, canals, and drainage systems.
Professional stakeholders including architects, structural engineers, and municipal planners utilize this framework to ensure compliance with the Law on Construction. The document provides official forms for the Building Technical Passport, the Maintenance Journal, and various inspection acts required for the legal operation of structures throughout their service life.
Technical Maintenance Organization
Maintenance is structured into routine observations, annual inspections, and extraordinary surveys to verify that structures meet essential safety and stability requirements.
- Routine Observations: Visual inspections performed at least once every two months to identify defects or deformations.
- Annual Inspections: Conducted after the winter season to evaluate the main structures and engineering systems.
- Extraordinary Surveys: Required following natural disasters, accidents, or a change in the building's technical supervisor.
- Specialized Inspections: Necessary for specific impacts such as aggressive environments or high temperatures, often occurring every 10–15 days.
Mandatory Maintenance Documentation
The regulation mandates a specific set of documents that must be maintained for the entire duration of a building's use. For multi-apartment buildings and public structures, these are primarily managed via the PDB IS.
- Building Technical Passport: Contains technical, economic, and energy characteristics, including changes after major repairs or reconstruction.
- Maintenance Journal: A log for recording defects found during routine observations and the measures taken to rectify them.
- Inspection Acts: Official records of annual, extraordinary, and specialized surveys (Forms provided in Annexes 3 and 4).
- Technical-Energy Passport: Required for heated buildings with a useful floor area exceeding 1000 square meters.
Maintenance of Hydro-technical Structures
Chapter VI details specific requirements for hydro-technical constructions, utilizing a scoring system from 0 to 10 to evaluate technical risk.
- Score 0–2.0: Indicates a good condition where elements meet all design requirements.
- Score 6.1–8.0: Signifies a bad condition with significant defects that reduce structural strength or durability.
- Score 8.1–10.0: Represents a critical or emergency state where collapse is possible.
- Regulated Elements: Includes the crest (ketera), upstream slope (aukštutinis šlaitas), drainage systems, and spillways (perteklinio vandens pralaidos).
Formation of New Engineering Cadastre Objects
Chapter IX outlines the procedures for creating new real estate objects from existing engineering structures. This process is strictly tied to the completion of construction, reconstruction, or major repairs.
- Division (padalijimas): Splitting one structure into two or more independent cadastre objects.
- Merging (sujungimas): Combining multiple structures into a single object of the same purpose.
- Amalgamation (perdalijimas): Redistributing parts between structures without changing their primary use.
- Formation Scheme: Must include a title page, explanatory note with technical indicators, and plans showing object boundaries.
Frequently Asked Questions
How often must routine building observations be performed?
Routine visual observations must be conducted at least once every two months as per Section 34 of the regulation.
Which buildings require a technical-energy passport?
A technical-energy passport is required for heated buildings with a useful floor area greater than 1000 square meters.
What is the minimum warranty retention for construction works in Lithuania?
Section 10.25 specifies a retention of at least 5% of the construction price for at least the first three years of the warranty period.
Who is eligible to perform technical maintenance on a single-family house?
According to Section 32, the user of a one- or two-apartment residential building may perform the technical maintenance themselves without appointing a certified supervisor.
How are building defects classified in the PDB IS?
Defects are classified as 'insignificant' (nežymus), 'significant' (žymus), or 'critical' (kritinis) based on the risk they pose to safety and property.
What happens if a critical structural condition is detected?
The person responsible for the inspection must immediately inform the owner and take actions to protect people and the environment from potential consequences.
