Upper Merion Township's Zoning Shift Poses New Risks for Data Centers

Executive Summary

Upper Merion Township, Pennsylvania, has reversed course on data center zoning, leaving developers who entered the market under prior assurances now exposed to legal and regulatory uncertainty. Township officials initially indicated data centers were permissible under existing code, then changed their position — triggering legal disputes that threaten active development timelines. Developers with existing approvals or fully entitled sites hold a meaningful advantage; everyone else faces a harder path. The InfraSale takeaway: zoning instability in a single township can reprice an entire regional market, and due diligence on entitlement status is now non-negotiable in Pennsylvania.

What Happened

Upper Merion Township, a suburban Philadelphia municipality in Montgomery County, Pennsylvania, told prospective data center developers that their projects would be permitted under the existing zoning code. Developers and landowners made site decisions, engaged engineers, and advanced capital based on those representations. Officials then changed their position, effectively pulling the rug out from under projects that had been structured around the earlier guidance.

The reversal has sparked legal action. Attorney Brian O'Neill is among those challenging the township's shift, arguing that developers relied in good faith on official statements about permitted uses. The dispute centers on whether the township can retroactively alter its zoning posture after stakeholders have committed resources based on prior assurances.

The litigation is now a live variable in the Upper Merion development pipeline. Until the legal question is resolved — either through the courts or a formal zoning amendment — any data center project in the township sits in a holding pattern of uncertain duration.

Source: The Philadelphia Inquirer

Why This Matters

Upper Merion is not an isolated case. Municipalities across the country are experiencing "zoning whiplash" — initially welcoming data centers for their tax base and low-traffic footprint, then reversing course under pressure from residents concerned about noise, water consumption, visual impact, and power draw. When that reversal happens after developers have committed capital, litigation follows.

The second-order effect is chilling. Other developers watching the Upper Merion situation will price in additional entitlement risk when evaluating Pennsylvania sites, particularly in townships without a formal data center use category in their zoning code. That risk premium either kills marginal deals or pushes developers toward markets with clearer regulatory frameworks.

For landowners in the region, the uncertainty cuts both ways. Sites that were being positioned for data center sale or ground lease may need to be repositioned. Conversely, landowners with fully entitled or pre-approved sites now hold a scarcity premium.

Legal disputes over zoning also consume time. Industry context: data center development timelines are already stretched by interconnection queues and supply chain constraints; adding 12–24 months of zoning litigation on top of those delays can make a project economically unviable.

Power & Interconnection Impact

Zoning uncertainty in Upper Merion has indirect but material implications for grid planning. Data centers are among the largest new load additions in the PJM interconnection footprint, and utilities rely on development pipelines to plan substation upgrades and transmission investments. When projects stall in litigation, the load forecasts those utility investments were premised on become unreliable.

Assumption: Developers who had initiated interconnection applications with PECO Energy or other local utilities serving Montgomery County may face a decision about whether to hold their queue position — which carries financial obligations — while the zoning question remains unresolved. Queue withdrawal is costly; holding a position for a project that may never receive entitlement is equally so.

The broader PJM picture remains supply-constrained. Interconnection queue reforms have already made new capacity harder to access. Projects that stall due to local zoning disputes do not simply pause — they often lose their queue position entirely, forcing a restart that adds years to the timeline.

Land, Zoning & Permitting Impact

The core problem here is informal reliance. Developers structured land deals around verbal or informal assurances from township officials rather than formal zoning determinations or use-by-right letters. That is a due diligence gap, but it is also one that reflects how data center site selection has historically operated at pace — developers move fast, and local governments have not always had the policy infrastructure to keep up.

Upper Merion's reversal signals that informal assurances are no longer sufficient in any market. Developers need written zoning opinions, formal interpretations, or use-by-right determinations before committing site control capital. In markets where data centers are not explicitly enumerated as a permitted use, a conditional use or special exception process may be required — adding months and public hearing exposure.

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Permitting complexity will also rise in townships that observe Upper Merion's litigation and preemptively tighten their codes. Industry context: several Pennsylvania municipalities have already enacted or are considering data center-specific regulations, including noise ordinances, stormwater standards, and utility impact fees, as a condition of approval. The era of data centers sliding in under generic industrial or commercial zoning is closing.

Investment Takeaway

Entitlement status is the new primary underwriting variable. Sites with formal, written zoning approvals in Pennsylvania now carry a hard-to-replicate premium. Buyers should verify the form and legal basis of any approval before proceeding.
Litigation timelines are unpredictable and capital-intensive. Investors underwriting Upper Merion projects should stress-test for 18–36 month resolution timelines and model the carrying cost impact on returns.
Alternative markets in PJM may offer better risk-adjusted exposure. Northern Virginia remains supply-constrained; Ohio, Indiana, and western Pennsylvania markets with explicit data center zoning frameworks present lower entitlement risk at this stage.
Landowners with clean entitlements gain leverage. If litigation confirms that prior approvals are protected, entitled sites become scarce and will command higher per-acre pricing.
Legal due diligence is now a line item, not a footnote. Developers should engage land-use counsel at the earliest stage of site assessment, before any site control agreement is signed.

InfraSale Market Angle

For developers actively sourcing data center sites in the Mid-Atlantic, Upper Merion is a signal to expand the search radius and tighten the entitlement checklist. The township's reversal is a case study in what happens when zoning frameworks fail to keep pace with demand — and it will not be the last one.

InfraSale users evaluating Pennsylvania sites should request formal written zoning opinions as a condition of any letter of intent. Sites where the permitted use for data centers is explicitly enumerated in the code — not inferred from a general industrial classification — should be prioritized. For investors, monitoring the O'Neill litigation outcome will provide a clearer read on how Pennsylvania courts treat reliance-based zoning claims.

The regional development pipeline is not dead. It is bifurcating: projects with clean entitlements will proceed; those without will face a longer, more expensive road to approval.

Market Signal

Location: Upper Merion Township, Pennsylvania
Primary Issue: Zoning instability
Infrastructure Theme: Permitting risk
Who Benefits: Developers with existing approvals or alternative sites
Who's at Risk: New data center developers and investors
InfraSale Takeaway: InfraSale users should closely monitor zoning developments in Upper Merion to assess investment viability.

Take Action

Zoning instability in Upper Merion is a real-time reminder that entitlement certainty is the foundation of any data center investment thesis. Developers and landowners need accurate, current site intelligence before committing capital in markets where the regulatory picture is shifting. Use InfraSale to identify sites where zoning clarity already exists — and get ahead of the pipeline before the entitled inventory tightens further.

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FAQ

How do zoning changes affect data center investments?

Zoning changes can invalidate the core assumptions underlying a site's development feasibility, affecting everything from permitting timelines to capital deployment schedules. When a municipality reverses its position on permitted uses, developers face the choice of absorbing delay costs, pursuing litigation, or exiting the site — each of which carries material financial consequences.

What legal challenges are emerging from Upper Merion Township's zoning dispute?

The central legal question is whether developers who relied on official township representations about permitted uses are entitled to protection under doctrines of equitable estoppel or vested rights. If courts side with the developers, prior approvals may be insulated; if the township prevails, projects will need to re-navigate the entitlement process under the revised code — adding significant time and cost.

What should investors consider when evaluating sites in unstable zoning markets?

Investors should require formal written zoning determinations — not verbal assurances — before advancing any site control agreement. Legal counsel specializing in Pennsylvania land use should be engaged early, and deal structures should include entitlement contingencies with well-defined exit provisions if approvals are not confirmed within a specified window.

Are other Pennsylvania municipalities likely to follow Upper Merion's approach?

Industry context: municipalities that observe a neighboring township's litigation tend to respond in one of two ways — they either proactively clarify or restrict data center uses in their own codes to avoid similar disputes, or they use the litigation outcome as precedent to tighten approvals. Either path increases permitting complexity for developers across the region.

What alternatives exist for developers stalled by zoning uncertainty in Upper Merion?

Developers should assess sites in adjacent Montgomery County municipalities or in other PJM-served Pennsylvania markets where data center use is explicitly permitted by code. Assumption: markets in York, Lancaster, and Lehigh Counties have seen early-stage data center interest and may offer more predictable entitlement paths, though interconnection capacity varies significantly by location.