MCI and Preferential Rent Documentation: What Survives a DHCR Audit

MCI rent increases and preferential rent arrangements are both legitimate, commonly-used tools for rent-stabilized owners — and both are also common sources of DHCR overcharge findings when the underlying paperwork doesn't hold up. Neither is complicated in concept; both require documentation discipline that's easy to let slip years after the fact.

What Qualifies as a Major Capital Improvement

A Major Capital Improvement is a building-wide (not apartment-specific) improvement that DHCR recognizes as eligible for a rent increase across the affected rent-stabilized units. Qualifying categories are specific and building-wide in scope: new boilers, roof replacement, elevator modernization, window replacement across the building, and plumbing system upgrades are among the most commonly approved categories. An improvement limited to a single apartment (a kitchen renovation in one unit, for example) is generally not an MCI — it falls under a different category (Individual Apartment Improvement) with its own separate rules.

The DHCR MCI Application Process and What It Requires

An MCI application to DHCR requires a specific documentation package: the building permit authorizing the work, a contractor's itemized invoice showing the scope and cost of the improvement, before-and-after photographs documenting the work, and the owner's certification that the work was completed as described. DHCR reviews this package to confirm the improvement actually qualifies as an MCI (rather than routine repair or maintenance, which doesn't qualify) and to calculate the resulting per-unit rent increase based on the improvement's cost, amortized per DHCR's formula. An MCI rent increase collected before DHCR approval is finalized — or based on an application that's later rejected — can itself become the subject of an overcharge claim, which is why the documentation needs to be assembled and retained at the time of the work, not reconstructed if DHCR asks later.

Preferential Rent and the 2019 HSTPA Change

A preferential rent is a rent charged that's lower than the legal regulated rent the owner would otherwise be entitled to charge — commonly used to make a unit more competitive in the market while preserving the higher legal regulated rent on paper. Before the 2019 Housing Stability and Tenant Protection Act (HSTPA), an owner could generally increase the tenant to the full legal regulated rent at renewal, once the initial preferential-rent lease term ended. HSTPA changed this: where a preferential rent was in effect, the tenant's lease must now be renewed at the preferential rent — with ordinary stabilized guideline increases applied to that preferential figure — for the duration of that tenancy, rather than jumping to the higher legal regulated rent ceiling at renewal. This is a durable, ongoing obligation tied to the tenancy, not a one-time condition that expires.

The Paperwork That Actually Protects You Here

For MCI: retain the permit, the itemized contractor invoice, dated before-and-after photographs, and the DHCR approval itself — together, not any single document alone — for as long as the resulting rent increase remains in effect on the lease. For preferential rent: retain the lease and rider clearly showing both the preferential rent charged and the legal regulated rent on paper, along with every renewal lease showing the preferential rent was correctly carried forward per HSTPA rather than reset to the higher figure. In both cases, the documentation that survives a DHCR audit is the documentation that was created at the time the decision was made — an owner reconstructing an MCI cost breakdown or a preferential-rent history from memory during an active overcharge proceeding is arguing from a much weaker position than one who can produce it as a matter of routine.