What explains the gap — and what does not

We want to be careful here, because the obvious inference is not the only one.

The benign reading. Most increases are within the published ceiling and therefore need no justification and offer nothing to arbitrate. A certification is not a contested event; it is a compliance step. As of July 14, 2026 the ceiling permits an increase of 5.678% without justification, which accommodates most ordinary increases.

The less comfortable reading. The threshold to get to arbitration is high and time-bound, and the parties are unevenly resourced. Under 25 Del. C. § 7046(b)(8), the state's legal-aid fund covers challenging an increase only where the proposed increase is 3% or more above the CPI-U, and only where requested by a homeowners association representing at least 25% of homeowners, or by a simple majority of noticed homeowners. Organising a quarter of a community inside a 30-day petition window, having received 90 days' notice, is a real obstacle.

And the deterrent the Authority itself identified. The minutes' own gloss on the Ridgewood Manor remand is that arbitration “can be both expensive and time-consuming” — a multi-year matter redone from the start after a Supreme Court remand. That is a discouraging precedent for a resident group weighing whether to petition.

We cannot say from the record which reading dominates. What the record does establish is that Delaware's principal check on above-inflation lot rent is almost never invoked.

What arbitration decides, when it happens

The substantive law is settled and favourable to residents on the central question. In July 2025 the Delaware Supreme Court affirmed that only the direct costs of a capital improvement can justify an above-CPI-U increase — not a return on investment, not depreciation, not the income tax the owner will owe on the higher rent. A community owner in that case sought an 8% return, depreciation and taxes on top of a $219,752 boardwalk, and recovered none of it.

The court also reaffirmed the repair-versus-improvement line: replacing a drainage pipe the owner had “always replaced” was ordinary repair, not a capital improvement, and folding it into a project did not change that.

So the doctrine is there. It is the procedural funnel that is narrow.

One qualification worth carrying: that decision construed § 7052(d), and SB 235, signed July 23, 2026, provides that the §§ 7052A/7052B calculations replace the § 7052 grounds. Whether indirect costs can be routed through the permanent calculations is unanswered, and the next arbitration is where it will be tested.

The other reason arbitration matters more than the numbers suggest

Section 7052B lets a community owner raise rent when allowed expenses — including taxes — rise faster than the county's 24-month CPI-U. In August 2025 New Castle County school districts reset their tax rates under emergency legislation, and apartment school-tax rates rose an average of 55% countywide.

Two floor amendments would have barred community owners from passing that specific increase through to lot rent. Both were stricken in the House on August 12, 2025, the same day the tax bill passed both chambers and was signed.

Cost pressure is also building on the infrastructure side. DNREC has identified 98 Delaware manufactured home communities with on-site wastewater systems, many predating any records. Capital improvements are a permitted justification for an above-ceiling increase, so a catalogue of failing systems is also a pipeline of future justifications — and the direct-cost rule is what will decide how much of it residents pay.

What a resident group should actually do

Diarise the 90 days from the notice date, not from when you noticed. The petition window is 30 days and it does not reopen.

Check the certified figure against DEMHRA's published index for your notice date. The Authority had to issue corrected certifications this spring after a state calculation error, so the number on your notice is not automatically right.

Get to 25% early. That is the threshold for association-initiated legal-aid support under § 7046(b)(8), and it is easier to reach before a deadline than during one. Community Legal Aid Society is the contractor and worked 211 cases in the last reported year.

Ask for the direct-cost ledger. If the justification is a capital improvement, the recoverable figure is the direct cost. Anything labelled return, depreciation or tax is, on current Supreme Court authority under § 7052(d), not recoverable.

What to watch next

The Wild Meadows arbitration is the first test of this framework in three years, and the Ridgewood Manor remand is a Supreme Court instruction being worked through on redetermination. Neither had produced a published decision as of this writing, and no Delaware outlet has covered either.

DEMHRA's board met February 5, March 17 and April 30 in 2026, with June 4 and August 27 scheduled. Minutes are posted only through April 30, so the August meeting is unreported.