Building a data center in Romania: the design & approvals path

Romania is one of Europe's emerging data-center locations — EU-member, well-connected, with a diversified and increasingly clean power mix. But for an international developer, the schedule risk is almost never construction. It is permitting and grid connection. This is a practitioner's map of the Romanian approvals path, the two things that actually govern the timeline, and how a local partner compresses it.

The land and the certificate of urbanism

Every project starts with a certificate of urbanism (CU) — an informational act under Law 50/1991, not an authorization. It states the land's legal, economic and technical regime, confirms what the current plan allows, tells you whether a zonal plan (PUZ) is required, and — most usefully — lists every aviz (approval) the project will need. Treat it as the master checklist for the whole campaign. The CU is issued in roughly 15 working days for a construction request (a term reduced from 30 by Law 193/2019); a CU issued for a subsequent urban-planning documentation runs longer.

Zoning: do you need a PUZ?

Almost always, yes. A data center is an industrial/technological use. Unless the parcel is already zoned for it, a Zonal Urban Plan (PUZ) — governed by Law 350/2001 and the General Urbanism Regulation (HG 525/1996) — must establish the function and the building indices (POT, CUT, height, setbacks). Three things routinely force a PUZ for a data center:

• Function change — the parcel's plan doesn't permit industrial/technological use.
• A derogatory PUZ (art. 32, Law 350/2001) — the project doesn't conform to the general plan, so a PUZ adjusts the indices within legal limits.
• Extending the buildable boundary — if the land is extravilan (outside the built-up area), the PUZ must bring it intravilan, and agricultural land must additionally be removed from the agricultural circuit (Law 18/1991).

Two structural facts a foreign developer should internalize. First, a PUZ requires a public-consultation stage (Order 2701/2010) and is adopted by a local-council vote (HCL) — a deliberative, political act. Second, only a planner certified by the Romanian Register of Urban Planners (RUR) may sign and steer it. Realistically, a PUZ runs 12–24 months to adoption.

Environmental assessment — two separate things

Don't conflate them. There is a plan-level environmental assessment (SEA, HG 1076/2004) attached to the PUZ, and a project-level environmental impact assessment (EIA, Law 292/2018) for the data center itself. A data center isn't explicitly named in the EIA annexes; it is screened under Annex 2 (industrial or urban development). The environmental agency issues a screening decision — either "no full EIA needed" (a few months) or a full impact report and public consultation leading to an environmental agreement (6–18 months). Water-hungry evaporative cooling adds a water-management approval (Law 107/1996); closed-loop, air or immersion cooling can reduce or remove it — a real design lever that also eases the environmental politics.

One item frequently missed: backup generators. Aggregated diesel or gas generation in the 1–50 MW band falls under the Medium Combustion Plant regime and needs an air-emissions authorization; a larger on-site power plant reaches industrial-emissions territory and may need energy-regulator licensing. Fold it in early.

Power: the real bottleneck

Grid connection is the day-one item, and usually the longest pole. A hyperscale load connects at high voltage (Transelectrica transmission for large consumers); the process runs from a connection request through a solution study to the connection permit (ATR), which reserves capacity and fixes the connection tariff, then to the connection contract and the physical works.

Here is the fact that reframes the whole conversation: Romania has issued grid-connection permits totaling more than 80,000 MW — roughly ten times national peak demand. Much of it is speculative and non-progressing, and the government has published the holder list to clear idle reservations. The practical consequence for a data center is that in congested nodes, capacity is reserved on paper by projects that may never build, and the network needs reinforcement — new stations and lines that are capital-heavy and slow. The "fast connection" zones the market advertises are real but scarce: specific uncongested nodes with real headroom. Identifying them is a site-selection decision worth years — engage the grid operator before you buy the land.

Fire safety and the rest of the approvals

A data center always triggers fire-safety approval (ISU) — the high fire load of Li-ion UPS and diesel storage guarantees it — with an aviz at design stage and an authorization after construction. Beyond that, the CU's list typically includes utility siting, energy, gas (if used), telecom/fiber (dual-path routing matters for a mission-critical facility), road access, public health, and — for tall structures near airports — civil-aviation approval. Large facilities may also draw designation as critical infrastructure (with the associated security approvals), which is as much a design input as a permitting item.

The building permit and completion

The building permit (autorizația de construire, AC) is issued under Law 50/1991 after the CU, the required avize and the verified technical project (which must pass a licensed project verifier under Law 10/1995). The statutory issuance term is short — weeks — once the file is complete. Construction and commissioning follow, then reception at completion. The building permit and the architecture are the short poles; zoning and grid are the long ones.

A note on the 2025 debureaucratization

An emergency ordinance in 2025 (OUG 31/2025) tightened the municipal deadlines in the planning chain and introduced tacit approval for ordinary technical avize that miss their statutory term. Useful — but scope it honestly: it does not reach the opportunity aviz that initiates a PUZ, the environmental acts (which keep their own procedures), the defense/security approvals, or the council vote that adopts the plan. It speeds the municipal steps; grid and environmental remain the real constraints.

How long it really takes — and how to compress it

On a pre-zoned industrial parcel with spare grid capacity and fiber, roughly 18–24 months to operational. On greenfield agricultural land that needs zoning, grid reinforcement and a full environmental assessment, realistically 3–5 years. The gap between those two numbers is almost entirely site selection — which is exactly why the highest-value work happens before land is committed.

The way months are recovered is not heroics on the building permit; it is running grid connection, zoning and environmental assessment in parallel, and having a local partner who owns the authority relationships and reads node capacity before capital is at risk. Repurposed energy sites — a decommissioned thermal-power site with an existing high-voltage connection — can skip the multi-year grid-reinforcement problem entirely.

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Beletage runs this path for international developers as the single Romanian point of contact — from land-and-grid feasibility through zoning, environmental and building approvals, to architect-of-record and full project delivery. If you are evaluating a Romanian site, the fastest first step is a fixed-fee feasibility and permitting-risk review. See our data-center services.