Climate declaration follow-up and statistics

During the period 2022–2025, a total of 3274 climate declarations has been registered at Boverket – the Swedish National Board of Housing, Building and Planning. You can read here more about the number of registered climate declarations per year and county, as well as the climate impact per building type. 

Number of registered climate declarations

Number of climate declarations registered at Boverket during 2022–2025. Source: Boverket’s climate declaration register and register of supervisory cases. Illustration: Boverket

A total of 3274 climate declarations has been registered in Boverket’s register since the regulations on climate declarations came into force on 1 January 2022. The distribution of submitted climate declarations per year is shown in the figure above. The requirement to register a climate declaration applies to buildings for which a building permit was applied for after 1 January 2022. As the construction process for erecting a building takes time from the moment of applying for a building permit to submitting a climate declaration before final clearance from the municipality, the low number of climate declarations registered in 2022 is justifiable.

Number of climate declarations per county 

Number of climate declarations per county registered at Boverket during 2022–2025. Source: Boverket’s climate declaration register and register of supervisory cases. Illustration: Boverket

Table: Number of climate declarations per county 2022-2025

County	Number
Blekinge län	31
Dalarnas län	129
Gotlands län	7
Gävleborgs län	40
Hallands län	213
Jämtlands län	61
Jönköpings län	120
Kalmar län	93
Kronobergs län	45
Norrbottens län	84
Skåne län	501
Stockholms län	703
Södermanlands län	55
Uppsala län	179
Värmlands län	112
Västerbottens län	65
Västernorrlands län	34
Västmanlands län	99
Västra Götalands län	457
Örebro län	69
Östergötlands län	177
Total	3274

The number of climate declarations registered per county varies from 7 to 703, a relatively wide distribution, as illustrated in the table and map above. One explanation for the relatively low number of climate declarations in certain counties is that less buildings are being constructed for reasons such as a small population. On the other hand, the larger number of climate declarations in certain counties could be attributed to the increased need to build more during a period of regional growth. 

Number of climate declarations by building type and year

Number of climate declarations per building type and year registered at Boverket during 2022–2025. Source: Boverket’s climate declaration register and register of supervisory cases. Illustration: Boverket

Number of climate declarations per building type 2022–2025

Building type	2022	2023	2024	2025
Single-family house	43	382	510	760
Multi-dwelling block	0	98	219	313
Special housing	0	12	25	46
Preschool	3	21	50	56
Primary/secondary school	8	15	37	49
Upper secondary school	1	2	5	7
Offices	3	25	44	49
Retail	1	27	29	54
Other	3	80	122	175
Total	62	662	1041	1509

 

Most of the 3274 climate declarations registered at Boverket are for single-family houses. When a climate declaration is registered for a mixed-use building, the building type is determined based on the building type whose gross floor area (GFA) was predominant in the building.

Climate impact per building type, median

Median climate impact in kg CO₂e/m² GFA for climate declarations registered at Boverket during 2022–2025. Source: Boverket’s climate declaration register and register of supervisory cases. Illustration: Boverket

Table: Median climate impact in kg CO₂e/m² GFA for climate declarations 2022–2025

Buildingtype	Median kg CO2e/m2 GFA 2022	Median kg CO2e/m2 GFA 2023	Median kg CO2e/m2 GFA 2024	Median kg CO2e/m2 GFA 2025
Single-family house	156	150	158	163
Multi-dwelling block	0	172	216	234
Special housing	0	197	235	241
Preschool	54	199	234	214
Primary/secondary school	12	82	206	234
Upper secondary school	166	320	303	326
Offices	92	246	276	244
Retail	229	287	261	266
Other	44	223	262	231

 

The diagram above shows median climate impact in kg CO₂e/m² GFA by building type and year. The median value varies from 163 to 326 kg CO₂e/m² GFA during the year 2025. In the category “primary and secondary school”, there are several buildings where reused modular buildings have been used, which can explain the relatively low median value for climate impact reported in the diagram above.

Median values are based on the climate impact reported from the climate declaration submitted to Boverket. To compare the median value with values in the reports issued by Boverket and the Royal Institute of Technology (KTH) one should consider the system boundaries. To avoid misleading comparisons, it is important to consider which aspects of the building’s life cycle have been included or excluded.

The assignment on limit values

You find the report Limit values for climate impact from buildings and an expanded climate declaration from Boverket in Relaterad information. 

There are climate declarations in Boverket’s register with unreasonably low or high climate impacts. This is the reason why the average value is not reported; instead, the median value has been chosen, as it better reflects the typical climate impact.

Increased use of specific climate data

During the years 2024 and 2025, the use of specific climate data, climate data from environmental product declarations (EPD), has increased significantly from 12 percent to 38 percent. This shows that climate declarations are increasingly providing a more accurate calculation of the actual climate impact from buildings.

Proportion of specific climate data and generic climate data in climate declarations between 2022 and 2025. Source: Boverket’s climate declaration register. Illustration:

Climate impact distributed by building elements

The highest climate impact within modules A1–A3 product stage is attributed to “Load-bearing structural elements, other” and the “Building envelope,” each accounting for approximately 37 percent of the total climate impact. “Load-bearing structural elements, foundation” accounted for 18 percent, while “Interior walls” accounted for 8 percent. This distribution indicates which building elements have the greatest climate impact and where measures to reduce climate impact can have the most significant effect.

Distribution of climate impact by building elements in modules A1–A3 (product stage). Source: Boverket’s register of climate declarations. Illustration: Boverket

Boverket’s supervision of climate declarations

Boverket is the supervisory authority tasked to control the quality and accuracy of climate declarations. Boverket verifies that the information in climate declarations is accurate and that the calculations of climate impact do not deviate significantly from the declared value. The table below shows statistics from Boverket’s supervision of climate declarations.

The table shows the number of climate declarations selected for control during the years 2023-2025, as well as the percentage of climate declarations registered at Boverket that were selected for control. Source: Boverket’s climate declaration register and register of supervisory cases.

Out of the 3274 climate declarations registered in Boverket’s database, 405 have been selected for inspection by Boverket. This represents 12.4 percent of all registered climate declarations. These declarations were registered between the years 2022 and 2025. Most cases were chosen through random sampling, although targeted inspections have also been conducted.

Improved quality of climate declarations over time

There has been noticeable improvement in both the knowledge and compliance with the regulations, leading to higher quality in the submitted climate declarations since the law on climate declaration came into force in January 2022. The proportion of climate declarations without deviations has increased steadily from 2023 to 2025.

The coverage rate in the submitted climate declarations is generally reported as high. In approximately 70 percent of the declarations, a coverage rate of 99 or 100 percent is indicated. There are also declarations with a low coverage rate, below 50 percent. If the coverage rate is over- or underestimated, this means that the reported climate impact is incorrect, either too low or too high. However, the understanding of coverage rate and quality appears to have improved over time.

About our statistics

The follow-up and statistics are based on data from Boverket’s climate declaration register, Boverket’s supervision of registered climate declarations, and supervision from 1 January 2022 to 31 December 2025.

Statistics are collated from the climate declaration register at Boverket and from supervisory cases on 7 January 2026. The statistics cover the years 2022 to 2025. Boverket is aware that a small number of buildings with a gross floor area under 100 m² are included in the statistics despite being exempted from the climate declaration requirement.