According to UNEP’s current estimate, buildings and construction account for about 37% of global CO₂ emissions and almost half of all materials extracted worldwide [1]. Moreover, a very substantial share of this footprint arises long before anyone moves in. The World Green Building Council breaks it down as follows: 28% of global energy-related emissions occur at the building operation stage, while a further 11% is attributable to “embodied” carbon, that is, to cement, steel, glass and construction itself [2]. Estimates from different organisations may diverge slightly, but the conclusion is the same — a building can no longer be judged by its heating bills.

Housing long remained on the periphery of this topic, since green certification was aimed at and focused on offices and shopping centres. Now, however, this is changing, albeit unevenly. The European Union is enshrining requirements in law, China is developing its own “star” rating system, and the simplified EDGE is gaining ground in emerging markets.

In Russia, the situation is taking a shape of its own. In 2022, LEED, BREEAM and WELL stopped working with Russian clients, even though by then the country had 243 LEED-certified and 186 BREEAM-certified projects, mostly commercial [3]. In housing, their place was taken by the national standard GOST R 70346-2022 [4], and from 1 July 2026 it was superseded by the interstate GOST 35329-2026, adopted by the Euro-Asian Council for Standardization, Metrology and Certification (EASC) [5].

The aim of our article is to compare these approaches and to understand which solutions actually pay off in a residential project. The material comprises regulatory documents, certification system manuals and empirical studies.

Let us begin with a distinction between requirements that is often overlooked. There are mandatory requirements, which are set by the state, and there are voluntary ones, which the developer chooses on its own.

In terms of mandatory requirements, the European Union has made the most progress. Under the recast directive on the energy performance of buildings, new buildings owned by public authorities must be zero-emission from 2028, and all other new buildings from 2030 [6]. On paper, everything looks good. Member States were due to transpose the directive into national law by 29 May 2026, yet as early as July the European Commission opened infringement procedures against all 27 EU countries [7].

The Russian model is built differently. The procedure is determined by Government Decree No. 1628 [8], the requirements are approved by Order of the Ministry of Construction No. 1550/pr [9], and thermal protection is regulated by SP 50.13330.2024 [10]. Specific energy consumption is regulated, whereas requirements for the carbon footprint are still under consideration. In the USA, the same role is played by energy codes: ASHRAE 90.1 for multi-storey buildings [11] and the IECC for low-rise housing.

Voluntary certification is adopted in addition to the mandatory regulations. Why is it needed if the law is already complied with? All of this is done for the sake of the market: price, green loans and “environmental” arguments for the buyer. At the same time, applying voluntary standards raises the quality bar. And as soon as requirements are tightened, a voluntary criterion becomes mandatory. LEED v5, for example, reflects this trend: every project must now assess embodied carbon, and the Platinum level cannot be achieved without reducing it by at least 20% [12].

If one compares the main guidance documents of the principal systems, it turns out that there are more similarities between them than differences (Table 1): energy, water, materials, indoor environment, site and transport are present everywhere — it is the methods of determining them that diverge.

Three differences matter to the developer.

1) Baseline. LEED compares the project with a calculation model based on ASHRAE 90.1, EDGE with a typical building in the same region, and the Russian standard with domestic regulations. The same “30% energy savings” carry different meanings in the two systems and cannot simply be carried over without recalculation.

2) Procedural complexity. EDGE was designed for emerging markets and is calculated in an online app [15]; a small developer finds it easier to work with.

3) The place of economics. DGNB treats economic quality as a separate assessment section [14]. In BREEAM, life cycle cost is addressed by just one of the criteria in the Management category [13].

The Russian standard is closest in structure to LEED and BREEAM but covers only multi-apartment buildings. In GOST 35329-2026, the assessment levels “satisfactory”, “good” and “excellent” have been replaced by “Bronze”, “Silver” and “Gold”, and an energy efficiency class not lower than A has appeared among the requirements [5]. For other types of real estate, the general standard GOST R 54964-2012 remains in force [17].

Water is a somewhat simpler matter. Investment in the system is small, and the result can be seen in the very first bills. Plumbing fixtures bearing the US WaterSense label use at least 20% less water than conventional ones, with no loss of quality [18].

More significant in scale is the issue of greywater reuse. Water from showers, baths and washbasins accounts for 50–80% of household wastewater, and if, after treatment, it is used for toilet flushing, a household saves up to 30% of its water [19]. The flip side is a separate pipe network and regular filter replacement; in a multi-apartment building these costs can eat up the savings on utility tariffs.

Stormwater runoff is a matter for the site rather than the building. In dense urban development, rainwater drains quickly into the municipal network and overloads it; permeable paving, on-site runoff retention, and green and blue roofs take off part of the load, and relevant criteria are present in all the systems listed in Table 1.

CLT structures. In 2022, the 25-storey Ascent residential tower, 86.6 m tall, was completed in Milwaukee; a hybrid of mass timber and a concrete core, it is, according to CTBUH, the tallest timber building in the world [20]. The main argument in favour of CLT is lower embodied carbon [2]. The drawbacks are also well known: cost, limited production capacity (especially in Russia) and stricter fire safety requirements.

Automation (BACS/BMS). Savings percentages quoted in catalogues should be treated with particular caution. Simulation according to the EN ISO 52120-1 method gives a spread of 19 to 71% for heating control, and this spread is explained by building type, glazing ratio and thermal protection [21]. Admittedly, the calculations under this method were made for offices, whereas in a residential building automation mainly controls the common building systems and the heating substation, and the upper bound is far out of reach here.

Heat pumps and solar panels. The story is similar with heat pumps and solar panels. According to the IEA, heat pumps are 3–5 times more efficient than gas boilers [22], but ground-source units involve high costs owing to expensive drilling, while the coefficient of performance of air-source units drops in freezing weather. In the EU, solar systems have effectively become mandatory, since new buildings must be solar-ready [6]. Elsewhere, everything depends on insolation, tariffs and, in a multi-apartment building, the modest roof area per apartment.

Practical takeaway: expensive solutions are best introduced in stages — first a single building section, a year or two of monitoring, then extension to the remaining sections.

How much does a green building cost?

The source most often cited here is G. Kats’s report for California. For 33 LEED-certified projects, the cost premium averaged no more than 2%, while life-cycle savings proved more than ten times greater [23]. It should be noted that the sample was non-residential and that LEED requirements have risen since then.

On the revenue side, the data are more plentiful and more reliable. Green-labelled offices in the USA rent for about 3% more and sell for 16% more than comparable non-green buildings [24]. In housing the percentages are more modest, but they recur from market to market: in the Netherlands, apartments and houses with A–C energy labels sell at higher prices, and the premium grows with the class [25]; in California, certified homes sell at a premium of about 2–4% [26].

Therefore, what needs to be compared is the difference in capital costs against the discounted savings and the possible price premium for a specific region, housing class and tariffs. By our estimate, façade systems with enhanced thermal protection combined with an individual heating substation and automatic control pay back in about 6–8 years.

Comparing the six systems leads to a simple observation. Their criteria are largely shared, but their baselines and methodologies differ so much that their figures cannot be compared directly.

For Russia, the picture is a distinct one. After the departure of LEED and BREEAM, housing moved to a national, and as of now an interstate, standard; whether it takes root will be decided by economic performance. The cost increase is moderate and the gain in value is confirmed, but its size depends on the market.

Ultimately, what decides the outcome is the choice of technologies for a specific project and climate. And until real operational data have been accumulated, any payback period remains a calculated one.

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PUBLISHED
October 2, 2026 · online

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