A useful LL97 portfolio plan connects coverage, compliance pathway, annual building data, emissions, filing, operating measures, capital work, and accountable decisions.
Start with a controlled covered-building roster
The roster should identify owner entity, BBL, BIN or BINs, address, gross floor area, Portfolio Manager property, BEAM record, Article 320 or Article 321 pathway, special circumstances, filing contacts, registered design professional, prior filings, open disputes, and current status. Ownership should compare that record with the current NYC Department of Buildings Covered Buildings List and the property’s actual characteristics.
DOB states that the Covered Buildings List reflects agency records, may change, and does not relieve owners of their legal obligations. Incorrect building identifiers, characteristics, or compliance pathways should follow the current dispute process. A portfolio program should track the evidence and disposition of each dispute rather than treating removal from an internal list as the end of the issue.
Build the annual result from auditable building data
Each building record should connect energy bills or utility feeds, fuel types, meter inclusion, district energy, onsite generation where applicable, property-use details, gross floor area, occupancy and operating information, emissions factors, adjustments or deductions, calculation year, and the data shared through Portfolio Manager and BEAM. The technical reviewer needs a clear route from source records to the reported result.
Building owners are responsible for the accuracy of information used for compliance and reporting. Portfolio data should therefore be reviewed before the filing cycle becomes urgent. Corrections to meters, use types, square footage, ownership, building identity, or missing periods may require coordination across utilities, property management, consultants, finance, and the City’s reporting systems.
Keep pathway, limit, filing, and performance separate
Coverage and compliance pathway determine which requirements apply; the applicable annual limit and building data determine the performance calculation; filing documents the required submission; and a capital plan addresses future operating and physical changes. A building can have a completed filing while still carrying performance, penalty, documentation, or future-period risk.
DOB’s current guidance distinguishes Article 320 and Article 321 pathways and requires recurring reports under the applicable rules. The owner and registered design professional should use the requirements in effect for the filing year. KOW’s planning work can coordinate the building data, technical analysis, measures, and project record without replacing the owner’s or design professional’s statutory responsibilities.
Create an action ladder for every building
Actions may include data correction, scheduling and controls improvements, maintenance, retro-commissioning, low-cost operating measures, tenant or operator coordination, lighting, ventilation and air-distribution work, domestic hot-water changes, equipment replacement, electrification, envelope improvements, onsite generation, or other project-specific strategies. Each measure should identify the affected systems, expected timing, dependencies, current evidence, planning cost, disruption, design need, and next decision.
The portfolio should distinguish ideas, screened measures, studied measures, owner-approved projects, funded work, work in design or procurement, completed projects, and verified outcomes. An estimated emissions effect is not a completed reduction, and a completed installation is not a verified annual result until the operating and reporting record supports it.
Roll up exposure without averaging away the problem
A portfolio dashboard can show current status, reported emissions, distance from the applicable limit, projected future exposure, measure pipeline, capital need, filing readiness, and open decisions. But an average portfolio emissions intensity can hide a small number of high-risk buildings, different compliance pathways, data-quality problems, or a capital project that cannot be transferred to another property.
Scenarios should retain their assumptions at the building level: future grid and emissions factors where applicable, use and occupancy, planned acquisitions or dispositions, equipment end of life, implementation date, utility or incentive assumptions, design constraints, and interactions among measures. The roll-up should lead back to the source calculation and project record.
Operate LL97 as an annual governance cycle
A durable program assigns ownership for coverage review, utility and Portfolio Manager data, BEAM records, registered-professional coordination, annual filing, disputes, measure evaluation, capital approval, implementation, commissioning, and post-project verification. Status meetings should focus on decisions and exceptions rather than recreating the building record each year.
The plan should be refreshed as DOB guidance, building data, operations, projects, ownership strategy, and future compliance periods change. Current annual compliance matters, but the larger objective is to connect reporting with a credible building-performance and capital program before time-sensitive projects become emergency responses.
Primary sources
Sources and technical references.
Source review current as of September 1, 2026.