## 4 Discussion
While the height of a wooden building is limited to 12 m in Slovakia, the situation is different in other countries of the world. A lot depends on the building regulations of individual countries. For example, in Australia, the maximum permitted height of a wooden building is 25 m. Tall wooden buildings are also found in northern Europe. In Norway, the Migestarnet wooden building was built in 2020, which has eighteen floors and a height of 81 m. In Sweden, the wooden skyscraper Sara Kulturhu is 75 m high and has 20 floors. In the Netherlands, a 21-storey timber building called Haut Amsterdam has been built, achieving the highest sustainability rating of BREEAM Outstanding. The HoHo Wien building was built in Austria in 2019. It has 24 floors and is 84 m high. The development and use of CLT panels, especially abroad, partially replaced reinforced concrete and brick-in-concrete structures [17]. The CLT system is widely used in the construction of low-, medium-, and even high-rise residential and public buildings [18; 19; 20]. The procurement of wooden buildings is the subject of green public procurement. According to the Commission of the European Parliament (year 2008), green public procurement (GPP) is \"a process in which public authorities seek to procure goods with a reduced environmental impact throughout their life cycle compared to goods with the same primary function that would otherwise be procured\" [34]. Some authors have conducted a systematic review of life cycle assessment (LCA) in the building procurement phase. In construction, GPP is more than LCA and the evaluation of tenders. In the topic of GPP, it is necessary to include the Conceptual Framework, which includes: LCA--Life Cycle Assessment, CBA--Cost/Benefit Analysis, MEAT--Most economically advantageous tender, and the EMS--Environmental Management System [35]. Limited awareness of green public procurement among decision-makers in the public sector can hinder their implementation. This situation is prevalent in the construction industry. Developing clear and consistent GPP criteria across product categories is an ongoing effort. There is a growing body of literature evaluating the concept of green public procurement [36; 37; 38; 39]. In the area of wooden buildings, Slovakia lags behind in terms of the number of wooden buildings. Our paper contributes to the spread of the need to implement wooden constructions of administrative buildings in Slovakia, thus contributing to the assigning of green public procurement. Previous studies have found that wood-based constructions struggle with insufficient awareness; our contribution offers an opportunity to overcome this struggle. The results of our research are useful to industry professionals, society, and building owners in adopting wood as a major construction material. This study may also increase the acceptance of the construction of taller buildings using wooden structures in the Slovak construction industry. The results of our research can be used for comparison with the results of cost analyses of wooden buildings in other countries, especially when it comes to countries similar to Slovakia, with similar research conditions such as a similar population, GDP, and land area, or post-communist countries and countries with a green state policy, etc.