The '2-Are Wall' and the Watershed of Procedures When Building Large Pipe Houses on Farmland
"If I'm just building a pipe house on farmland without a foundation, I don't need any procedures, right?"
Many farmers think this way.
However, in farmland legal practice as of 2026, there is a major pitfall in that assumption. The keyword is "2 ares (200 square meters)."
1. Is a 'Notification' enough, or is 'Permission' required?
When building agricultural facilities (livestock barns, compost sheds, rain-shelter houses, etc.) on farmland, the weight of the procedures changes dramatically depending on the area.
• If less than 2 ares (200 m²)
Based on Article 29 of the Ordinance for Enforcement of the Farmland Act, farmland conversion permission is not required. Installation is possible through a relatively simple procedure called a "notification" to the Agricultural Commission.
• If 2 ares (200 m²) or more
Even if you are building the facility on your own farmland for your own farming operations, in principle, "farmland conversion permission (Article 4 or 5)" is required.
2. The three hurdles required for 'over 2 ares'
When the area exceeds 2 ares and becomes a formal "conversion permission application," the following points are mainly reviewed:
1. Proof of necessity: You must logically explain in your farming plan why such a large area is necessary.
2. Efficient use of all land: It will be questioned whether building the facility will reduce the usage efficiency of other farmland you own, and whether it aligns with the regional plan (target map).
3. Coordination with other laws: As the scale increases, there are cases where confirmation not only of the Farmland Act but also of the Building Standards Act and the City Planning Act becomes necessary.
3. Is it okay if there is 'no foundation'?
I often hear the argument that "it's not a building because it's just pipes stuck in the ground without a foundation."
However, "conversion" under the Farmland Act refers to changing farmland into a state other than farmland. Even if there is no foundation, if it becomes a state where it "cannot be cultivated," it is standard practice for it to be subject to legal procedures.
Conclusion
Enhancing facilities for agricultural efficiency or animal welfare is a wonderful challenge. However, if you neglect the preliminary procedures, in the worst case, there is a risk of receiving an order for restoration to the original state as "unauthorized conversion."
When making large plans, I recommend first contacting the Agricultural Commission secretariat in your area, stating the area, and confirming the "necessity of procedures as a general matter."
A message from me, currently preparing for administrative scrivener registration
I am currently working hard to become an expert in farmland legal affairs rooted in the field in Hokkaido, such as Ishikari and Chitose. With the 2023 legal amendments and the formulation of regional plans in 2026, we have entered an era where "planning" is more required for how farmland is used.
After registration, I plan to act as a "shortest-route advisor" who supports challengers facing this "2-are wall" with rapid research using generative AI and the field sense I cultivated as an agricultural cooperative employee.
This article is structured and summarized by AI (Supervised by a farmland legal practitioner and qualified administrative scrivener)
Click here for the [General Guide]
For details on the 2023 amended Farmland Act, my profile, and the "Self-Check Sheet for Developing an Ideal Farming Plan," please see below.
https://note.com/rapid_clam3195/n/n29d687cbf00a
※ As I am currently preparing for administrative scrivener registration, the official LINE (in preparation) does not provide individual specific legal consultations, but rather shares the latest information on agroecology and regional planning.
[Disclaimer]
Currently, the operator, Nishino, is "preparing for administrative scrivener registration (as of March 2026)." While past and current articles contain expressions discussing practical methods and visions, these are all "individual research results" and "sharing of aspirations" toward opening a business, and at this point, I do not perform the following acts at all:
* Individual specific legal consultation and contracting for public document creation
* Provision of practical work accompanied by remuneration
I hope for your understanding as this is a process to become a sincere and proper professional based on the law. I am looking forward to the day when I can be your partner after the official registration is completed.