Journal · 2026.07 · 9 min

Getting Water and Power onto Farmland in Taiwan — Clear “Permitted Use” First

Getting water and power to a greenhouse on farmland is never as simple as phoning the utility — it is tied to land-use legality, the purpose of the power, and permitted use of the facility. This piece lays out the five categories of agricultural power, the documents you need to connect water and electricity, and the all-important permitted-use consent.

You buy the land, plan the greenhouse, and then get stuck because “water and power won’t connect.” This is one of the situations Hwa-Nan meets most often on site. Many growers assume hooking up utilities is a phone call away, as it is for a house; in reality, applying for utilities on Taiwanese farmland turns on the legality of the land use, the purpose of the power, and whether the facility has obtained “permitted use.” If those three don’t line up, neither Taipower nor the water company can approve supply.

Below is a practical walkthrough of connecting water and electricity on farmland, and the documents each step needs — behind every one of them sits an engineering and regulatory judgement.

Farmland once needed little more than a land title to apply to Taipower for power; but that opened the door to illegal structures and factories on farmland. To rein this in, the Ministry of Economic Affairs now requires that applications for power on farmland present a “permitted-use document” from the relevant authority matching the purpose of the power, before Taipower may approve supply. The bar is higher — but lawfully applied-for agricultural facilities and farmhouses are unaffected, and for genuine farmers it is really a safeguard.

So the first principle of farmland utilities is this: first make sure the land, the facility, and the intended use stand up under the rules — then talk about wiring and piping.

Under the “Scope and Standards for Agricultural Power,” agricultural power must directly serve farming, and falls into five categories — each mapping to a different approval or certificate. Working out which one your usage belongs to is the first step to assembling the right paperwork.

Greenhouse cultivation most often falls in category ②: lighting and climate control for protected horticulture. And the classic approval for that category is the “permitted-use consent for an agricultural facility” — which is exactly why permitted use is the pivotal precondition for the whole utility application.

To apply for an agricultural-power certificate you generally need the following (details vary by county — follow your local office’s notice):

• The application form, plus a schedule of the powered equipment and proof of its origin.
• Proof the facility is lawfully used — a contract, building permit, or permitted-use consent.
• Land-registration and cadastral-map transcripts.
• A copy of the applicant’s ID; companies and groups attach their incorporation documents.

In practice, the electricity application means sitting down with Taipower, layout plan and business plan in hand. Taipower usually asks the owner first to obtain a “farmland site-inspection record” from the township/district office, confirming there is no illegal structure and that real farming is under way, before the connection work proceeds.

Whether to go single-phase first or straight to three-phase depends on whether permitted use is already in hand. Three-phase power counts as agricultural power, and its application requires proof of a lawful facility or permitted use — before the facility is approved, you often can’t get it. So if early groundwork — clearing, fencing, temporary lighting, or a small pump — needs power urgently, you can first apply for single-phase power (ordinary lighting supply) as a low-threshold, quick stopgap. But note: two stages means two applications and possible duplicated wiring and charges, so the total cost is higher. Conversely, if permitted use and the facility spec are settled before ground breaks, applying once for three-phase power is usually cheaper and avoids rework — which is exactly why Hwa-Nan argues for settling utilities at the design stage.

Agricultural water comes from roughly three sources, each with different cost and process:

• Tap water: apply to the water company to extend the main; cost turns mainly on pipe material and distance — the farther, the more.
• Irrigation water: if the site lies within an Irrigation Agency service area, you can draw from the irrigation system; such sites also require sign-off from the local water authority during permitted-use review.
• Groundwater wells: drilling generally requires water-right registration or a temporary-water permit; cost varies widely with lowland vs. hills, shallow vs. deep, and bore diameter.

A caution: farmland inside a water-quality protection zone, a drinking-water source zone, or a severe land-subsidence area faces extra controls on abstraction and drilling. These are things to check when choosing the land — not to discover after signing.

The classic approval for category ② (cultivation power) is the “permitted-use consent for an agricultural facility on farmland.” In other words, before a greenhouse can lawfully connect to power, the facility usually has to stand up under the rules first.

Under Article 4 of the review rules for permitted use of farmland as agricultural facilities, you file an application — in triplicate — with the city or county authority where the land sits (in practice usually handled by the township/district office):

• A copy of the applicant’s ID; a legal entity attaches its registration document.
• A business plan — stating the schedule, total installed electrical capacity, shading ratio, vegetation-cover management, and engineering design.
• Land-registration and cadastral-map transcripts from within the last month (waived if an e-transcript is available; urban land adds a zoning certificate).
• A facility layout drawing at a scale no smaller than 1:500 (1:1,200 for livestock facilities).
• A land-use consent (waived if the applicant solely owns the land).
• Other documents required by the authority.

Once the review passes (Article 5), the authority issues the consent. Note two things: total facility area generally may not exceed 40% of that parcel of farmland; and a facility legally exempt from a building permit must be built and reported for completion inspection within one year of consent, while one legally requiring a permit must apply to the building authority within six months — miss the deadline and the approval lapses.

Building a greenhouse really happens in two stages: planning first, then design. Planning answers the business questions — what to grow, at what scale, in how many phases, whether to expand later; design then turns those answers into structure, mechanical and electrical systems, and piping. The most common utility mistake is skipping planning and going straight to design: with no idea of what will eventually be built, there is no way to know how much water and power to apply for at the source — and in practice the application almost always comes in too small, so expansion means re-applying, re-wiring, re-trenching: the same money spent twice.

This is also why pre-construction drawings are non-negotiable. Without drawings, nobody knows how many metres of water pipe and conduit must be run; without quantities, there is no way to know the required investment — quotes become guesses. Contracting without drawings is the blind men and the elephant: each contractor touches only a part, prices his own piece, builds his own way; interfaces don’t meet, quantities don’t reconcile, and the investment is out of control from day one.

Hwa-Nan’s role begins at the planning stage: first thinking through the farm business plan with the grower, then sizing the facility from it — total electrical capacity, water and drainage routing — and drawing the permitted-use requirements into the construction drawings, using architectural and engineering expertise to serve the farming operation, so the greenhouse not only gets built, but connects to utilities, clears review, and can grow.

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