A provision in Delaware's school tax bill could increase annual costs for commercial property owners by as much as 85%—and most don't know it yet.
Most Delaware property owners and managers haven't heard of HB462, but those who own or occupy non-residential property in New Castle County should pay close attention. Buried in what appears to be a routine school funding bill is a provision that fundamentally changes how school property taxes are calculated for commercial and industrial properties.
Under Section 3 of HB462 (amending Delaware Code Title 14, § 1904(c)), school districts in New Castle County now have the authority to levy school property taxes on non-residential properties at up to 1.85 times the residential rate. In plain terms: a commercial property owner could face a school tax bill up to 85% higher than a residential property owner would pay on an equivalent assessed value.
This is not a one-time fee. It's a recurring annual tax obligation that directly affects operating costs for any business that owns its building or leases from an owner who passes through property taxes.
The provision applies to non-residential property—commercial offices, retail spaces, warehouses, manufacturing facilities, and industrial properties. If your business owns real estate in New Castle County or leases space where the landlord is subject to school property tax, you need to understand this change.
Residential property owners are not affected. The differential tax rate applies only to non-residential classifications.
Sections 1–5 and 7–9 of HB462 take effect upon enactment. Section 9 includes a transition provision for school districts that are already exceeding the 1.85x ratio, but the authority for districts to impose the higher rate is now in place.
This means school districts can begin implementing the higher rate immediately, though the timing of actual tax bills will depend on each district's assessment and billing cycle.
First, determine whether your property is classified as non-residential in New Castle County. Check with your local assessor's office if you're uncertain.
Second, contact your school district to ask whether they intend to exercise this authority and, if so, when the higher rate will take effect. Districts are not required to use the full 1.85x multiplier—they may levy at any rate up to that ceiling—so the actual impact will vary by location.
Third, if you lease commercial space, review your lease to understand how property taxes are allocated. Some leases pass through taxes directly; others have caps or sharing arrangements. This change could trigger lease renegotiations.
Finally, factor this into financial planning. Even if your district hasn't announced a rate increase yet, the legal authority now exists, and budgets should reflect the possibility of a material increase in school property tax expense.
Source: Delaware HB462, An Act To Amend Title 14 Of The Delaware Code Relating To School Taxes; Section 3 (§ 1904(c)).