1. Which exception disappeared
The exception was temporary and its end was known in advance, so it did not come as a surprise. The deadline was written into the regulation.
The earlier regulation provided an exception under which the nearly zero-energy requirement did not apply to houses of up to 220 m² heated area. According to information published by the Ministry of Climate, the five-year transition of houses from low-energy to nearly zero-energy construction was deemed complete from 1 June 2025.
From that date the nearly zero-energy requirements also apply to those houses. The exception therefore did not vanish abruptly but reached the end point of a five-year transition.
2. Why it affects most houses
One observation about size makes the reach of this change visible. Most houses fall below the boundary.
220 square metres of heated area is a large house in Estonian house building, and most houses built fall below it. The exception therefore covered the greater part of the market, which means its removal affects almost every new house rather than a small share.
The practical consequence is unambiguous: designing a house without a renewable energy solution is generally no longer possible. The solution must be planned from the outset.
3. What it means for design
Three consequences, and the third is the one the client notices most. It concerns the budget.
| Consequence | Note |
|---|---|
| A solar electricity system becomes part of the design | not an optional extra |
| Roof orientation and shading must be assessed early | the relief may depend on them |
| The budget grows at the preparation stage | rather than during construction |
The third has to be explained before the design contract, not after. Against it stand lower running costs, which is the economic logic of the whole requirement.
4. How to calculate the boundary
Precision is needed here, because the boundary is specific and measured in a particular way. The wrong area gives the wrong answer.
The boundary is expressed as heated area, not gross area and not the area recorded in the building register, and the definition of heated area comes from the regulation in force. These areas must not be conflated.
Staying below the boundary is no longer a strategy, however, since the exception is gone: the boundary is now historical rather than applicable. It matters only for older projects whose application was submitted before 1 June 2025.
5. When the old requirements still apply
One rule resolves most questions, and it is the date rule. The applicable requirement follows from the application date.
According to information published by the Ministry of Climate, the updated requirements apply to buildings whose building permit application or building notice is submitted from the date of entry into force. Where the document was submitted before that date, the earlier requirements apply.
Houses applied for before 1 June 2025 may therefore still fall under the old requirements, as covered by the article on the date rule. The date must be evidenced from the application.
Summary and four practical rules
The exception under which the nearly zero-energy requirement did not apply to houses of up to 220 square metres heated area ended on 1 June 2025 as the end point of a five-year transition. Since 220 square metres is a large house in Estonia, the change affects almost every new house, and a solar electricity system becomes part of the design. The boundary is expressed as heated area rather than gross area, and it is now historical, relevant only for applications submitted before 1 June 2025.
Four rules: allow for the renewable energy solution from the start of a house design. Explain the budget effect to the client before the design contract. Use the definition of heated area, not other area concepts. Check the application date for older projects.
This article offers professional orientation as at the date of verification. It replaces neither the regulations in force nor the assessment of a competent specialist.